Document:

<PAGE>
                                                                 Exhibit 10.1.13

                                  OFFICE LEASE

                                     between

                         PARKSIDE SALT LAKE CORPORATION

                                    Landlord

                                       and

                        ADVANCED TELECOMMUNICATIONS, INC.

                                     Tenant

                             PARKSIDE TOWER BUILDING
                             215 South State Street
                              Salt Lake City, Utah
<PAGE>

                                TABLE OF CONTENTS

Section
-------
                                                                            Page
                                                                            ----
 1. Rentable Area of Premises .............................................. 6

 2. Term - Commencement Date and Expiration Date ........................... 6

 3. Rent and Other Payments ................................................ 6

 4. Security Deposit ....................................................... 8

 5. Personal Property Taxes ................................................ 9

 6. Use of Premises ........................................................ 9

 7. Condition of Premises: Repairs, Maintenance and Construction ........... 9

 8. Mechanics' Liens .......................................................10

 9. Building Services ......................................................10

10. Common Areas ...........................................................11

11. Landlords Right of Access ..............................................11

12. Indemnification and Waiver .............................................12

13. Insurance ..............................................................12

14. Damage or Destruction of Building or Premises ..........................14

15. Eminent Domain .........................................................14

16. Assigning - Mortgaging - Subletting - Change in Ownership ..............15

17. Subordination - Attornment .............................................16

18. Default ................................................................17

19. Remedies ...............................................................17

20. Rules and Regulations ..................................................18

21. Surrender of Premises ..................................................18

22. Holding Over ...........................................................19

23. Notices ................................................................19

24. Estoppel Certificates ..................................................19

25. Liability of Landlord ..................................................19

26. Landlord's Inability to Perform ........................................19

                                        2
<PAGE>

27. Attorneys Fees                                                          20

28. General Provisions                                                      20

Exhibit "A" Legal Description of Property                                   23

Exhibit "B" Drawings of Premises                                            24

Exhibit "C" Memorandum of Commencement Date Rentable Area                   25

Exhibit "D" Tenant Work Letter                                              26

Exhibit "E" Rules and Regulations                                           39

Exhibit "F" Tenant's Estoppel Certificate                                   42

Exhibit "G" Parking Provisions                                              43

                                        3
<PAGE>

                                  OFFICE LEASE

THIS OFFICE LEASE (this "Lease") is made this 28th day of December 1999,
between, PARKSIDE SALT LAKE CORPORATION, a Delaware corporation ("Landlord "),
and, ADVANCED TELECOMMUNICATIONS, INC., a Delaware corporation ("Tenant").

                                LEASE OF PREMISES

Landlord hereby leases to Tenant and Tenant hereby leases from Landlord, on the
terms and conditions hereinafter set forth, those premises (the Premises") set
forth in Item 2 of the Basic Lease Provisions and shown in the drawing attached
hereto as Exhibit "B", which Premises are a part of that office building (the
"Building") identified in Item 1 of the Basic Lease Provisions and situated on
that certain real property described in Exhibit "A" attached hereto (the
"Property").

                             BASIC LEASE PROVISIONS

<TABLE>
<S>                                 <C>
 1. Building Name and Address:      Parkside Tower Building
                                    215 South State Street
                                    Salt Lake City, Utah 84111

 2. Premises:                       The space on the 3rd, suite 380, as shown on
                                    Exhibit "B".
                                    -----------
    Rentable Area:                  Approximately 6,744 square feet.
    Usable Area:                    Approximately 5,796 square feet.

 3. Basic Annual Rent:              Basic Annual Rent       Monthly Installments
                                    -----------------       --------------------
    Year 1:                         $l14,648.00             $9,554.00
    Year 2:                         $116,334.00             $9,694.50
    Year 3:                         $119,706.00             $9,975.50
    Year 4:                         $123,078.00             $10,256.50
    Year 5:                         $124,764.00             $10,397.00
    Year 6:                         $128,136.00             $10,678.00
    Year 7:                         $129,822.00             $10,818.50
    Year 8:                         $131,508.00             $10,959.00
    Year 9:                         $133,194.00             $11,099.50
    Year 10:                        $134,880.00             $11,240.00

                                    Based on a beginning rate of $17.00 per year
                                    per square foot of Rentable Area.

 4. Tenant's Percentage:            3.6%
    Base Year:                      2000

 5. Scheduled Commencement Date:    On or about February 1, 2000.

 6. Expiration Date:                January 31, 2010

 7. Tenant Improvement Allowance:   $10.00/usable square foot or $57,960.00

 8. Security Deposit:               $20,000.00

 9. Guarantor(s):                   None

10. Tenant's Broker:                Tres Telecom Real Estate Services and CB
    Landlord's Broker:              Richard Ellis NAI Utah Commercial Real
                                    Estate - Collin Perkins
</TABLE>
<PAGE>

      AGENCY DISCLOSURE: At the signing of this Lease, the listing agent
      represents Landlord, and the leasing agent represents Tenant. Landlord and
      Tenant each confirm that prior to signing this Lease, this agency
      disclosure was acknowledged by both parties. (   ) Landlords Initials
      [ILLEGIBLE] Tenant's Initials

11. Use of premises:                      General office purposes.

12. Address for Payments and Notices:
      Landlord:                           Payments and Local Notices

                                          Cottonwood Management
                                          215 S. State, Suite 805
                                          Salt Lake City, UT 84111
                                          Attention: Lorrie Ostlind

    Tenant:                               Notices
                                          Advanced Telecommunications, Inc.
                                          730 2nd Avenue South, Suite 1200
                                          Minnesota, MN 55402

            IN WITNESS WHEREOF, the parties hereto have executed this Lease,
consisting of the foregoing provisions and Sections 1 through 28 of the
Additional Lease Provisions which follow, together with Exhibits "A" through "I"
incorporated herein by this reference, as of the date first above written.

LANDLORD:                                 TENANT:

PARKSIDE SALT LAKE CORPORATION            ADVANCED TELECOMMUNICATIONS, INC.

                                                                     PLEASE SIGN
                                                                       & DATE

By: /s/ [ILLEGIBLE]              RM       By: /s/ Satish C. Tiwari
    -------------------------------           ----------------------------------

Its: Asset Manager                        Its:       SATISH C. TIWARI
     ------------------------------                 V.P. ENGINEERING AND
                                                   NETWORK IMPLEMENTATION
                                             ADVANCED TELECOMMUNICATIONS, INC.
                                                 730 2ND AVE S. SUITE 1200
                                                   MINNEAPOLIS, MN 55402

Date: 1-11-2000                           Date: 12/30/1999
      -----------------------------             --------------------------------

                                       5
<PAGE>

                           ADDITIONAL LEASE PROVISIONS

SECTION 1. RENTABLE AREA OF PREMISES

            The Rentable Area of the Premises is provided in Item 2 of the Basic
Lease Provisions. For the purpose of this Lease, "Rentable Area" is calculated
pursuant to the Standard Method for Measuring Floor Area of Office Buildings,
ANSI 265.1-1980, commonly known as the "BOMA standard."

SECTION 2. TERM -- COMMENCEMENT DATE AND EXPIRATION DATE

            The term of this Lease shall commence on the date on which Tenant
first takes possession of the Premises. If Landlord is unable to deliver
possession of the Premises to Tenant on or before the Scheduled Commencement
Date, this Lease shall not be void or voidable, but rather, shall remain in full
force and effect except as otherwise provided in this Section 2. Landlord shall
not be subject to any liability to Tenant for any loss or damage resulting from
such non-delivery and Tenant's obligations hereunder shall not be affected
thereby. If Landlord is unable to deliver possession of the Premises to Tenant
within thirty (30) days after the Scheduled Commencement Date, Tenant shall have
the option to terminate this Lease, and Landlord shall not, by reason thereof,
be subject to any liability except that Landlord shall return to Tenant all
monies which Landlord has theretofore received from Tenant as prepaid rent or as
a security deposit, without interest; provided, however, Tenant's occupancy of
the Premises at any time shall conclusively be deemed a waiver of this
provision. The term of this Lease shall, unless this Lease is terminated sooner
as provided herein, end on the "Expiration Date" as provided in Item 6 of the
Basic Lease Provisions and shall not be extended by any such delay. The date
upon which the term of this Lease actually commences shall hereafter be referred
to as the "Commencement Date." The period from the Commencement Date through the
Expiration Date is the "Lease Term," unless it is sooner terminated as provided
herein. Within thirty (30) days after the Commencement Date, Landlord and Tenant
shall execute the memorandum attached hereto as Exhibit "C", but failure to do
so shall not affect Tenant's obligations under this Lease.

SECTION 3. RENT AND OTHER PAYMENTS

            3.1 Basic Annual Rent. Tenant shall pay to Landlord rent for the
Premises in an amount equal to the Basic Annual Rent set forth in Item 3 of the
Basic Lease Provisions for each year and a pro rata portion thereof for each
partial year during the Lease Term (the "Basic Annual Rent"). Basic Annual Rent
shall be paid in equal monthly installments in the amount set forth in Item 3 of
the Basic Lease Provisions, in advance and without prior notice, invoice or
demand, on the first day of each month commencing on the Commencement Date.
Basic Annual Rent payable for any period of less than one (1) month shall be
prorated based upon a thirty (30) day month.

            3.2 Additional Rent.

            3.2.1 Tenant's Share. In addition to Basic Annual Rent, Tenant shall
pay to Landlord, as additional rent ("Additional Rent"), the amount, if any, by
which Tenant's Share of Direct Expenses for each Expense Year exceeds Tenant's
Share of Direct Expenses for the Base Year. If the Lease Term falls partially
within an Expense Year, Tenant's share of Direct Expenses shall be equitably
prorated based upon a 360-day year consisting of twelve 30 day months, in
calculating the amount of Tenant's Additional Rent for such Expense Year.
Landlord may estimate Direct Expenses and Tenant's Additional Rent ("Estimated
Additional Rent") periodically, and after notice from Landlord of Estimated
Additional Rent for an Expense Year, Tenant shall pay Landlord, with each
installment of Basic Annual Rent, an amount equal to one-twelfth (1/12) of such
Estimated Additional Rent (or, if the Estimated Additional Rent is for a period
of less than twelve months, Tenant shall pay such Estimated Additional Rent on a
monthly basis ratably over the period to which such Estimated Additional Rent
relates).

            3.2.2 Definitions: As used in this Section 3.2, the following terms
have the meaning hereinafter set forth:

            (i) "Base Year" is the calendar year or other period described in
            Item 4 of the Basic Lease Provisions. The Base Year is an Expense
            Year.

                                       6
<PAGE>

            (ii) "Tenant's Share of Direct Expenses" for a given Expense Year is
            an amount equal to the Tenant's Percentage set forth in Item 4 of
            the Basic Lease Provisions multiplied by the amount of Direct
            Expenses for such Expense Year. If the Rentable Area of the Premises
            and/or the Rentable Area of the Building is changed, Tenant's
            Percentage shall be appropriately adjusted.

            (iii) "Expense Year" shall mean each twelve (12) consecutive month
            period commencing January 1st of each year.

            (iv) "Direct Expenses" shall mean "Operating Expenses" plus "Tax
            Expenses." If during any Expense Year the Building is on a monthly
            average less than ninety-five percent (95%) occupied, the Direct
            Expenses shall be increased to reflect the Direct Expenses which
            Landlord reasonably determines it would have so incurred had the
            Building been ninety-five percent (95%) occupied and the Additional
            Rent shall be based upon the Direct Expenses so adjusted.

            (v) "Operating Expenses" shall mean any and all costs and expenses
            paid or incurred by Landlord in connection with the operation,
            maintenance, management and repair of the Building and Property. By
            way of illustration but not limitation, Operating Expenses shall
            include the following: (A) the cost of supplying all utilities
            (unless Landlord elects to separately meter any utilities to the
            Premises, in which case Tenant shall pay directly the charges for
            those utilities and Operating Expenses shall not include similar
            utilities furnished to other tenants' premises), the cost of
            operating, maintaining, repairing and managing the utility systems,
            mechanical and heating systems, ventilation and air conditioning
            systems, sanitary and storm drainage systems, and escalator and
            elevator systems, the cost of environmental and energy surcharges
            imposed by any governmental entity, and the cost of supplies and
            equipment and maintenance and service contracts in connection
            therewith; (B) the cost of landscape maintenance, all supplies, and
            relamping; (C) the cost of parking area maintenance, including
            resurfacing, repainting and restriping, if applicable, (D) the cost
            of fire, extended coverage, all-risk, boiler, sprinkler, public
            liability, property damage, workmen's compensation, loss of rent,
            earthquake (only if available at commercially reasonable rates) and
            other or additional insurance that Landlord purchases for the
            Building and Property, including such endorsements thereto as
            Landlord may desire, all in such amounts as Landlord may reasonably
            determine; (E) wages, salaries and other labor costs, including
            payroll and employment taxes, and employee medical, welfare, pension
            and other fringe benefits for persons whose services are exclusively
            devoted to on-site management, security and maintenance of the
            Building and Property; (F) fees, charges and other costs, including
            (but not limited to) management fees, consulting fees, legal fees,
            accounting fees and security service fees, of all independent
            contractors engaged by Landlord (including any affiliates of
            Landlord) or reasonably incurred by Landlord in connection with the
            management, operation, maintenance and repair of the Building and
            Property; (G) the cost of licenses, permits and inspections and the
            cost of contesting the validity or applicability of any government
            enactments which may affect Operating Expenses; (H) the fair market
            rental value of the property manager's office in the Property; (I)
            depreciation of the cost of acquiring or the rental expense of
            personal property used in the maintenance, operation and repair of
            the Building and Property; and (J) the cost of any reasonable
            capital improvements made to the Building or Property as a
            labor-saving device or to effect other economies in the operation or
            maintenance of the Building or Property, or as required under any
            governmental law or regulation that was not applicable to the
            Building or Property at the time that permits for the construction
            thereof were obtained, or as periodically required to maintain the
            appearance of the Property and its first-class, competitive quality,
            such costs to be amortized over such reasonable period as Landlord
            shall determine, together with interest on the unamortized balance
            at a market rate. For purposes of this Lease, Operating Expenses
            shall not include "Tax Expenses"; principal or interest expense,
            except as provided in clause (J) above; leasing commissions and
            other costs related to leasing to, improvements for, disputes with
            or eviction of tenants in the Building; depreciation on the
            improvements contained in the Building or Property, except as
            provided in clause (I) above; or the cost of capital expenditures
            not included in clause (J) above. Additionally, for purposes of
            computing Tenant's Base Year, excluded from this calculation are all
            one-time expenses incurred by Landlord which are attributable to
            repair or replacement of deferred items noted during due

                                       7
<PAGE>

            diligence and acquisition of the Property. The computation of
            Operating Expenses shall be made in accordance with generally
            accepted accounting principles.

            (vi) "Tax Expenses" shall include real property taxes, current
            installments of any general or special assessments, license fees,
            commercial rental taxes, in lieu taxes, levies, charges, penalties
            or similar impositions, imposed by any authority having the direct
            power to tax against or attributable to any legal or equitable
            interest of Landlord in the Property, including tenant improvements
            and Changes (as hereafter defined) to the extent not paid directly
            by tenants, which are paid or incurred by Landlord, and which shall
            include, but not be limited to, the following:

                  (A) Any tax on Landlord's rent from the Property or as against
            Landlord's business of leasing any of the Property, but specifically
            excluding Landlord's federal, state or city income, franchise,
            inheritance or estate taxes;

                  (B) Any assessment, tax, fee, levy or charge imposed by
            governmental agencies for such services as fire protection, street,
            sidewalk and road maintenance, refuse removal and for other
            governmental services; and

                  (C) Any assessment, tax, fee, levy or charge, upon this
            transaction evidenced by this Lease or any document to which Tenant
            is a party, creating or transferring an interest or an estate in the
            Premises.

            3.2.3 Statement of Actual Direct Expenses. Landlord shall give to
Tenant on or before the end of each Expense Year falling in whole or in part
during the Lease Term, a statement (the "Statement") which shall state the
Direct Expenses incurred or accrued for such preceding Expense Year, and which
shall indicate the amount, if any, of Tenant's Additional Rent for such
preceding Expense Year. Upon receipt of the Statement for each Expense Year
falling in whole or in part during the Lease Term, if Tenant's Additional Rent
exceeds the amount of Estimated Additional Rent paid by Tenant for such Expense
Year, Tenant shall pay, with its next installment of Basic Annual Rent due, or,
if the Lease Term has ended, within thirty (30) days after the Statement is
rendered, the full amount of such deficiency. If payments of Estimated
Additional Rent made by Tenant for such Expense Year exceed the actual amount of
Tenant's Additional Rent, then Tenant shall receive a credit against future
payments of Additional Rent; provided, if any such credit has not been applied
as of the end of the Lease Term, Landlord shall pay Tenant an amount equal to
such unapplied credit on or before the last to occur of: (i) the thirtieth
(30th) day following the last day of the Lease Term; or (ii) the thirtieth
(30th) day following the delivery to Tenant of the Statement setting forth such
credit. The failure of Landlord to timely furnish the Statement for any Expense
Year shall not prejudice Landlord from enforcing its rights under this Section
3.

            3.3 Payment of Rent. All amounts payable by Tenant to Landlord under
this Lease shall be deemed to be rent and, except as expressly provided in this
Lease, shall be payable to Landlord without abatement, deduction or offset, at
Landlord's address as provided in Item 13 of the Basic Lease Provisions or to
such other persons or at such other places as Landlord designates in writing. If
Tenant's obligation to pay any rent accrues prior to the expiration or earlier
termination of this Lease, then such obligation shall survive such expiration or
termination, even if the amount is not then due or calculated.

SECTION 4. SECURITY DEPOSIT

            Tenant has deposited with Landlord the amount indicated in Item 8 of
the Basic Lease Provisions as security for the full and faithful performance of
each and every provision of this Lease to be performed by Tenant. If Tenant
defaults with respect to any provision of this Lease, Landlord may (but shall
not be required to) use, apply or retain all or any part of this security
deposit for the payment of any rent or any other sum in default, or for the
payment of any other amount which Landlord may spend or become obligated to
spend by reason of Tenant's default or to compensate Landlord for any other loss
or damage which Landlord may suffer by reason of Tenant's default. If any
portion of said deposit is so used or applied, Tenant shall, within five (5)
days after written demand therefor, deposit cash with Landlord in an amount
sufficient to restore the security deposit to its original amount. Prior to the
time when Tenant is entitled to any return of the security deposit, Landlord may
intermingle such deposit with its own funds and use such sum for such purposes
as Landlord may determine. Tenant shall not be entitled to any interest on the
security deposit.

                                       8
<PAGE>

SECTION 5. PERSONAL PROPERTY TAXES

            With respect to Tenant's trade fixtures, furnishings, equipment and
all other personal property located in the Premises, and any improvements made
to the Premises in excess of Landlord's building standard tenant improvements,
(i) Tenant shall be liable for and pay at least ten (10) days prior to
delinquency all taxes assessed against or levied thereon ("Tenant's Taxes") and
(ii) when possible, Tenant shall cause Tenant's Taxes to be assessed and billed
separately from the taxes on the Property of Landlord; but if Tenant's Taxes
shall be assessed and taxed with the Property, Tenant shall pay them to Landlord
within ten (10) days after Landlord's delivery to Tenant of a statement in
writing setting forth the amount of Tenant's Taxes.

SECTION 6. USE OF PREMISES

            6.1 Limitation of Use. Tenant shall use and occupy the Premises
solely for the purpose stated in Item 11 of the Basic Lease Provisions and shall
not use or occupy the Premises or permit the same to be used or occupied for any
other purpose without the prior written consent of Landlord. Tenant agrees that
it will not do or permit anything to be done in or about the Premises which will
in any way obstruct or interfere with or infringe upon the rights of other
tenants or occupants of the Building or Property, or to injure or annoy them, or
use or allow the Premises to be used for any improper, immoral, unlawful or
objectionable purpose, nor shall Tenant cause, maintain or permit any nuisance
in, on or about the Premises.

            6.2 Compliance With Governmental and Insurance Regulations. Tenant
shall not do or permit to be done anything that will invalidate or increase the
cost of any fire, extended coverage or other insurance policy covering the
Building, and Tenant shall promptly upon demand reimburse Landlord for any
additional premium charges for such policy or policies caused by reason of
Tenant's failure to comply with the provisions of this Section 6.2. Tenant shall
not bring or permit to remain on the Premises any Hazardous Substances, except
usual office supply products used and stored in usual quantities and manner. As
used in the preceding sentence, the term "Hazardous Substances" means any
hazardous or toxic substances, materials or wastes, including, but not limited
to, those substances, materials, and wastes listed in the United States
Department of Transportation Hazardous Materials Table (49 CFR ss. 172.101) or
by the Environmental Protection Agency as hazardous substances (40 CFR Part 302)
and amendments thereto, or such substances, materials and wastes which are or
become regulated under any applicable local, state or federal law including,
without limitation, any material, waste or substance which is (i) petroleum,
(ii) asbestos, (iii) polychlorinated biphenyls, (iv) defined as a "hazardous
waste," under Section 19-6-102 of the Utah Code Annotated, Solid and Hazardous
Waste Act, or any rule promulgated thereunder, (v) designated as a "hazardous
substance" pursuant to Section 311 of the Clean Water Act, 33 U.S.C. ss. 1251,
et seq. (33 U.S.C. ss. 1321) or listed pursuant to Section 307 of the Clean
Water Act (33 U.S.C. ss. 1317), (vi) defined as a "hazardous waste" pursuant to
Section 1004 of the Resource Conservation and Recovery Act, 42 U.S.C. ss. 6901,
et seq. (42 U.S.C. ss. 6903) or (vii) defined as a "hazardous substance"
pursuant to Section 101 of the Comprehensive Environmental Response,
Compensation, and Liability Act, (42 U.S.C. ss. 9601).

SECTION 7. CONDITION OF PREMISES: REPAIRS, MAINTENANCE AND CONSTRUCTION

            7.1 Condition of Premises. Tenant acknowledges that neither Landlord
nor any agent of Landlord has made any representation or warranty with respect
to the Building or the Premises or with respect to the suitability of either for
the conduct of Tenant's business. Tenant hereby agrees to take the Premises in
their "as is" condition, subject to the provisions of Section 7.2.2 and Exhibit
"D" attached hereto. The taking of possession of the Premises by Tenant shall
conclusively establish that the Premises and the Building were at such time in
good sanitary order, condition and repair.

            7.2 Maintenance and Repair.

            7.2.1 Tenant Repairs and Maintenance. Tenant shall at its sole cost
and expense keep and maintain in good and tenantable condition and repair, the
Premises and every part thereof, including, without limitation, the floor
coverings, interior walls, ceiling, doors, drapes and other window treatments,
plumbing, fixtures and equipment therein. Tenant shall not commit or suffer to
be committed any waste in or upon the Premises, nor effect any Changes, nor do
anything in or on the Premises that, in Landlord's sole opinion, detracts

                                       9
<PAGE>

from the quality or appearance of the Building. All damage or injury to the
Premises, caused by the act or negligence of Tenant, its employees, agents,
invitees, permittees, licensees or contractors shall be promptly repaired by
Tenant, at its sole cost and expense, to the satisfaction of Landlord, and
subject to such requirements respecting construction that Landlord shall
reasonably impose. Landlord may but shall not be obligated to make any repairs
that are not promptly made by Tenant and to charge Tenant for the cost thereof.
Tenant hereby expressly and irrevocably waives the benefit or applicability of
any statute or law now or hereafter in effect that would otherwise afford Tenant
the right to make repairs at Landlord's expense or to terminate this Lease
because of Landlord's failure to comply with the provisions of Section 7.2.2.

            7.2.2 Landlord Repairs and Maintenance. Landlord shall maintain and
repair the structural, mechanical and utility elements and Common Areas of the
Building and Property. Any restriction on or interference with Tenant's access
to the Premises shall be limited to the minimum amount necessary to accomplish
the maintenance or repair work. Rent under this Lease shall not be abated as a
result of any such activities unless Tenant's access to the Premises is
prevented for more than 48 hours in which case, except as provided in the next
sentence, the rent shall abate for the balance of such obstruction. If the need
for repairs was caused by any act or negligence of Tenant or its employees,
agents, invitees, permittees, licensees or contractors, then such repairs shall
be performed at Tenant's expense and no abatement of rent shall occur.

            7.3 Construction of Improvements to the Premises. Except for
alterations, additions, modifications or improvements (collectively, "Changes")
expressly required or permitted by this Lease, Tenant shall not make any Changes
to the Premises or any part thereof without Landlord's prior written consent,
which consent shall not be unreasonably withheld or delayed. To the extent
permitted or consented to hereunder, any construction undertaken in or to the
Premises shall be performed in accordance with this Section and any reasonable
requirements then imposed by Landlord. All Changes made in or to the Premises
shall become the property of Landlord and a part of the realty. All initial
tenant improvements to the Premises, and all later Changes to the Premises that
are non structural that cost in excess of twenty thousand dollars ($20,000)
shall, at Landlord's option, be performed by Landlord or its contractor. Any
later Changes to the Premises costing less than twenty thousand dollars
($20,000), or later Changes that cost $20,000 or more which Landlord elects not
to construct may be constructed by Tenant, subject to reasonable construction
and other requirements then imposed by Landlord, including the right to
reasonably approve all plans and specifications and charge Tenant a supervision
fee equal to five percent (5%) of the cost of such work. Landlord shall pay for
the cost of initial improvements to the Premises in accordance with the
provision of Exhibit "D" attached hereto up to the amount of the "Tenant
Improvement Allowance" specified in Item 7 of the Basic Lease Provisions, if
any, and the balance shall be paid by as provided for in Exhibit "D". Unless
otherwise expressly provided in this Lease, Tenant shall pay all costs of any
later Changes to the Premises.

SECTION 8. MECHANICS' LIENS

            Tenant hereby agrees to keep the Property free from any liens
arising out of any work performed, materials furnished or obligations incurred
by or on behalf of Tenant and to promptly notify Landlord if it learns of any
such liens.

SECTION 9. BUILDING SERVICES

            9.1 Provision of Services. So long as Tenant is not in default
hereunder, Landlord agrees, subject to the terms and conditions hereinafter set
forth, to furnish or provide for the furnishing to the Premises (i) air
conditioning, heat, lighting, and elevator service only during the hours of 7:30
a.m. to 6:00 p.m. Monday through Friday, except legal holidays, and 8:00 a.m. to
1:00 p.m. Saturdays, in such quantity and of such quality as Landlord determines
in its sole judgment is reasonably necessary for Tenant's comfortable use and
enjoyment of the Premises for general office purposes and, at all other times,
to provide air conditioning, heating and lighting at Landlord's prevailing rate,
and one elevator; (ii) on the same floor as the Premises, water for lavatory and
drinking purposes at all times when the Premises are occupied; (iii) routine
janitorial services five (5) days per week (except for legal holidays); and (iv)
maintenance of the Common Areas. No gas shall be provided to or permitted in the
Premises. Electricity service and costs therefor, except electricity used for
before or after hours lighting or electricity that is separately metered, are
the obligations and expense of Landlord, as Operating Expenses, provided
Landlord is entitled to reimbursement therefor to the extent such costs are
included in Additional Rent. Tenant shall arrange for and shall pay the entire
cost and expense of all materials and services

                                       10
<PAGE>

relating to or used on the Premises not expressly required to be provided and
paid for by Landlord pursuant to this Lease.

            9.2 Interruption of Services. Landlord shall under no circumstances
be liable in damages or otherwise for any failure or interruption of, or
reduction in any utility service or Building service being furnished to the
Premises by Landlord or otherwise and no such failure or interruption shall
under any circumstances entitle Tenant to withhold, reduce or abate any rent or
terminate this Lease, regardless of whether caused by riot, strike, lockout,
labor disputes, breakage, breakdowns, accidents, repairs, governmental
regulation or moratorium, any act or omission of Tenant or its employees,
agents, invitees, licensees, customers or visitors or any other cause.

            9.3 Additional Building Service Demands. Tenant shall not install
any computers, copiers or other electrical office equipment in the Premises
without Landlord's prior written approval. Should any equipment installed by
Tenant produce any significant amount of heat or cause any significant
additional usage or draw on the electrical or other utility system, Landlord
shall not be responsible for the adequacy of any air conditioning, electric
current or other utilities affected thereby, and to the extent Tenant uses or
requests additional utilities or Building services as a result thereof, Tenant
shall pay to Landlord an amount reasonably estimated by Landlord to be the
additional costs incurred thereby. If and where heat generating machines or
devices are used in the Premises which affect the temperature otherwise
maintained by the air conditioning system, Landlord reserves the right to
install additional or supplementary air conditioning units for the Premises or
other affected areas of the Building, and the entire cost of installing,
operating, maintaining and repairing the same shall be paid by Tenant to
Landlord promptly after demand by Landlord.

SECTION 10. COMMON AREAS

            The term "Common Areas" as used herein shall mean all areas and
facilities outside the Premises or premises leased to other tenants of the
Property and within the exterior boundaries of the Property which are provided
and designated from time to time by Landlord for the general use and convenience
of Tenant and other tenants of the Property and their respective employees,
invitees or other visitors. Common Areas include, without limitation, walkways,
sidewalks, service quarters, hallways, restrooms (if not part of the premises),
stairways, elevators and walls, except to the extent situated entirely within
the Premises or premises leased to other tenants of the property. Tenant, its
employees and invitees shall have the nonexclusive right to use the Common Areas
along with others entitled to use same, subject to Landlord's rights and duties
as hereinafter set forth. Landlord shall have the right to temporarily close or
obstruct the Common Areas or any part thereof for maintenance, alteration,
addition or improvement purposes, or to protect Landlord's legal rights, and to
change the size, use, shape or nature of any such Common Areas and remove
portions of the Common Areas from Tenant's use, provided such change does not
deprive Tenant of the substantial benefit and enjoyment of the Common Areas or
its Premises.

SECTION 11. LANDLORD'S RIGHT OF ACCESS

            Landlord reserves for itself at any and all times the right to enter
the Premises and to take materials and equipment therein, as necessary, for
purposes of (i) providing janitorial services and any other service to be
provided by Landlord to Tenant hereunder; (ii) examining or inspecting the
Premises; (iii) serving or posting notices of non- responsibility; (iv) showing
the same to prospective tenants or mortgagees of the Premises or purchasers of
the Building; (v) emergency entry, by force if necessary; (vi) entry by security
personnel during non-business hours to make security checks; or (vii) making
such Changes or repairs to the Premises or to any other portion of the Building
as Landlord may deem necessary or desirable, including the installation of
sprinklers in the Premises and Building, all without being deemed guilty of an
eviction of Tenant and without abatement of rent. Landlord shall at all times
have and retain a key with which to unlock all of the doors in, upon and about
the Premises, excluding Tenant's vaults and safes. Landlord shall have the right
to place, maintain, and repair all utility equipment of any kind in, upon, and
under the premises as may be necessary for the servicing of the premises or
other portions of the Building.

SECTION 12. INDEMNIFICATION

            12.1 Indemnification. To the extent not prohibited by law, Landlord,
its partners, trustees ancillary trustees, and their respective officers,
directors, shareholders, members, beneficiaries, agents, servants, employees,
and independent contractors (collectively, "Landlord Persons") shall not be
liable for any damage,

                                       11
<PAGE>

claims, or loss either to person or property, or resulting from the loss of use
thereof, which damage is sustained by Tenant or by other persons claiming
through Tenant; provided, however, nothing herein is intended to limit the
liability of each of the Landlord Persons for damage arising solely from his,
her or its own gross negligence or intentional misconduct, which gross
negligence or intentional misconduct of Landlord Persons other than Landlord
itself, shall not be imputed to Landlord. Tenant agrees to indemnify, defend,
and hold Landlord harmless from all claims, costs, expenses, losses, damages,
and liabilities, including attorney's fees, except those caused solely by
Landlord's negligence, gross negligence or intentional misconduct, arising or
resulting from (a) any accident, injury, death, loss, or damage to any person or
to any property, including without limitation, the person and property of the
Tenant and its partners, trustees, officers, directors, shareholders, members,
beneficiaries, licensees, invitees, or any subtenants or subtenants' agents,
employees, contractors, or invitees, servants, guests, or independent
contractors ("Tenant Persons"), and all other persons at any time in the
building or the Premises or the Common Areas, (b) the occupancy or use of the
Premises by the Tenant, or (c) any act or omission or negligence of Tenant
Persons. The indemnification obligations of Tenant under this Lease shall
survive the expiration or earlier termination of this Lease.

            12.2 Tenants Compliance with Landlord's Fire and Casualty Insurance.
Tenant shall, at Tenant's expense, comply as to the Premises with all insurance
company requirements pertaining to the use of the Premises. If Tenant's conduct
or use of the Premises causes any increase in the premium for such insurance
policies, then Tenant shall pay Landlord for nay such increase. Tenant, at
Tenant's expense, shall comply with all rules, orders, regulations or
requirements of the American Insurance Association (formerly the National Board
of Fire Underwriters) and with any similar body.

SECTION 13. INSURANCE

            13.1 Tenant's Insurance. Tenant shall maintain the following
coverages in the following amounts.

                  13.1.1 Commercial General Liability Insurance covering the
insured against claims of bodily injury, personal injury, and property damage
arising out of Tenant's operations, assumed liabilities, or use of the Premises,
including a Broad Form Commercial General Liability endorsement covering the
insuring provisions of this Lease and the performance by Tenant of the indemnity
agreements set forth in Section 12.1 of this Lease, for limits of liability not
less than:

            Property Injury and                  $2,000,000 each occurrence
            Property Damage Liability            $2,000,000 annual aggregate

            Personal Injury Liability            $2,000,000 each occurrence
                                                 $2,000,000 annual aggregate

                  13.1.2 Physical Damage Insurance covering (i) all office
furniture, trade fixtures, office equipment, merchandise, and all other items of
Tenant's property on the Premises installed by, for, or at the expense of
Tenant, (ii) the Tenant Improvements, including any Tenant Improvements which
Landlord permits to be installed above the ceiling of the Premises or below the
floor of the Premises, and (iii) all other improvements, alterations, and
additions to the Premises, including any improvements, alterations, or additions
installed at Tenant's request above the ceiling of the Premises or below the
floor of the Premises. Such insurance shall be written on an "all risks" of
physical loss or damages basis, for the full replacement cost value new without
deduction for deprecation of the covered items and in amounts that meet any
co-insurance clauses of the policies of insurance and shall include a vandalism
and malicious mischief endorsement, and sprinkler leakage coverage.

                  13.1.3 Loss-of-income and extra-expense insurance in such
amounts as will reimburse Tenant for direct or indirect loss of earnings
attributable to all perils commonly insured against prudent tenants or
attributable to prevention of access to the Premises or to the Building as a
result of such perils.

                  13.1.4 The minimum limits of policies of insurance required of
Tenant under this Lease shall in no event limit the liability of Tenant under
this Lease. Such insurance shall (i) name Landlord, and any other party it so
specifies, as an additional insured; (ii) specifically cover the liability
assumed by Tenant under this Lease, including, but not limited to, Tenant's
obligations under Section 12.1 of this Lease; (iii) be

                                       12
<PAGE>

issued by an insurance company having a rating of not less than A-X in Best's
Insurance Guide or which is otherwise acceptable to Landlord and licensed to do
business in the state in which the Building is located; (iv) be primary
insurance as to all claims thereunder and provide that any insurance carried by
Landlord is excess and is non-contributing with any insurance requirement of
Tenant; (v) provide that said insurance shall not be canceled, expire, or
coverage changed unless thirty (30) days' prior written notice shall have been
given to Landlord and any mortgagee or ground or underlying lessor of Landlord;
and (vi) contain a cross-liability endorsement or severability of interest
clause acceptable to Landlord. Tenant shall deliver said policy or policies or
certificates thereof to Landlord on or before the Commencement Date and at least
thirty (30) days before the expirations dates thereof. In the event Tenant shall
fail to procure such insurance, or to deliver such policies or certificate,
Landlord may, at its option, procure such policies for the account of Tenant,
and the cost thereof shall be paid to Landlord as additional Rent within five
(5) days after delivery to Tenant of bills thereof.

            13.2 Subrogation. Landlord and Tenant agree to request that their
respective insurance companies issuing property damage insurance waive any
rights of subrogation that such companies may have against Landlord or Tenant,
as the case may be, so long as the insurance carried by Landlord or Tenant,
respectively, is not invalidated thereby. As long as such waivers of subrogation
are contained in their respective insurance policies, and subject to Section 14,
Landlord and Tenant hereby waive any right that either may have against the
other on account of any loss or damage to their respective property to the
extent such loss or damage is actually insured under policies of insurance for
fire, all risk coverage, theft, public liability, or other similar insurance.

            13.3 Additional Insurance Obligations. Tenant shall carry and
maintain during the entire Lease Term, at Tenant's sole cost and expense the
insurance required to be carried by Tenant pursuant to this Section 13, and such
other reasonable types of insurance coverage and in such reasonable amounts
covering the Premises and Tenant's operations therein, as may be reasonably
requested by Landlord. Tenant shall not do or permit to be done anything which
shall cause the cancellation of, invalidate, increase the rate of, or otherwise
adversely affect, the insurance policies referred to in this Section 13.

            13.4 No Gap In Coverage. All insurance provided by Tenant under this
Lease shall be coordinated with any preceding, concurrent or subsequent,
occurrence or claims made in insurance, in such a manner as to avoid any gap in
coverage against claims arising out of occurrences, conduct or events which take
place during the period beginning on the Lease Date and ending on termination of
this Lease.

            13.5 No Landlord Representation. Landlord makes no representation
that the insurance coverage required of Tenant provides adequate coverage for
Tenant's needs or for its obligations under this Lease. Nothing in this Lease is
intended to make Tenant an insured party in any manner under any insurance
policy carried by Landlord.

            13.6 No Waiver of Insurance Requirements. Landlord shall not be
deemed to have waived or reduced any of the insurance coverage requirements for
Tenant except by an express written agreement to that effect. The receipt by
Landlord or its contractors or agents of insurance policies, certificates,
letters, or other correspondence, documents or information which do not conform
to the insurance requirements of this Lease, or the failure of Landlord to
receive policies, certificates, or other documentation requires by this Section
13, shall not be deemed to be Landlord's consent to a waiver or reduction of any
such requirements, despite any failure by landlord to object to same at the time
of receipt (or lack of receipt), or thereafter. Any reduction, modification, or
waiver of any of Tenant's insurance requirements under this Lease may be made
only by written document signed by Landlord and Tenant which expressly amends
the pertinent described portions of this Lease.

SECTION 14. DAMAGE OR DESTRUCTION OF BUILDING OR PREMISES

            14.1 Partial Damage. Except as provided in Section 7.2, if the
Premises or the Building is damaged by fire or other insured casualty and the
insurance proceeds have been made available therefor by the holder or holders
of any mortgages or deeds of trust covering the Property, the damage shall be
repaired by Landlord; provided, if (a) such repairs cannot, in Landlord's sole
opinion, be made within ninety (90) days after the occurrence of such damage
without the payment of overtime or other premiums; (b) such repairs cannot be
made at a cost equal to or less than the amount of insurance proceeds available
therefor; (c) the Premises by reason

                                       13
<PAGE>

of such damage are rendered wholly untenantable; (d) the Premises are damaged in
whole or in part during the last six (6) months of the Lease Term; or (e) the
Premises or the Building (whether the Premises are damaged or not) should be
damaged to the extent of fifty percent (50%) or more of the then-monetary value
thereof, then Landlord shall not be required to make such repairs but may, at
its discretion, elect to do so. Landlord's election to make such repairs must be
evidenced by written notice to Tenant within ninety (90) days of Landlord's
learning of the occurrence of the damage. Any reconstruction or repair of the
Premises Landlord is required or elects to make in accordance with the
provisions of this Section 14.1 shall be substantially to the condition that
existed immediately prior to the damage or destruction. If Landlord is not
required to make such repairs and does not elect to make them then either party
may, by written notice to the other, cancel this Lease as of the date of the
occurrence of such damage, provided, Tenant may not elect to terminate this
Lease if the damages to the Premises were due to the act, omission, fault or
neglect of Tenant or its employees, agents or visitors. If any policy of
insurance required to be obtained by Tenant under this Lease covers any damage
or loss which Landlord is required or elects to repair under this Section 14.1,
Tenant shall take such action as may be necessary to collect the proceeds of
such insurance relating to such damage or loss and shall pay such proceeds to
Landlord.

            14.2 Tenant Reconstruction Obligation. Tenant shall be required to
repair or replace at its sole cost and expense Tenant's trade fixtures,
furniture, equipment and other personal property in the Premises.

            14.3 Rent Abatement. In the event of any repair, reconstruction and
restoration as provided in Sections 14.1, Tenant's rent shall be equitably
abated proportionately with the degree to which Tenant's use of the Premises is
impaired commencing from the date of destruction and continuing during the
period of such repair, reconstruction or restoration, provided, however, that
there shall be no rent abatement whatsoever if either (i) the damage is due to
the act, omission, fault or neglect of Tenant or its employees, agents or
visitors or (ii) if the use and enjoyment of the Premises is not affected for
more than two (2) business days of operation.

            14.4 Notice of Casualty. Tenant shall give prompt notice to Landlord
of any casualty or accident of which Tenant is aware occurring in the Premises
or in the Building and any defects therein or damages thereto or in any fixtures
or equipment.

SECTION 15. EMINENT DOMAIN

            15.1 Partial Taking. If there is a taking of or damage to less than
the entire Premises, then with respect to that portion of the Premises not taken
or damaged, this Lease shall continue in effect and the Basic Annual Rent and
Tenant's Share shall be reduced or adjusted proportionately. Landlord shall, as
promptly as possible, restore, repair and replace that portion of the Premises,
Building or Common Areas not so taken or damaged to a complete architectural
unit or units for the use and occupancy of Tenant and other tenants and, as
nearly as possible, to the condition existing prior to the taking or damaging.
Landlord shall not be required to expend for such work an amount in excess of
the amount received by Landlord as damages for the part of the Property so taken
less amounts required to be paid by Landlord to mortgage lenders.
Notwithstanding the foregoing, Landlord or Tenant may elect, within thirty (30)
days after the taking or damaging, to terminate this Lease if (i) twenty percent
(20%) or more of the Premises or Building are taken or damaged, or (ii) so much
of the parking areas of the Property are taken or damaged that Tenant cannot be
assured the use of the number of parking spaces required by municipal code,
considering the similar usage of other tenants at the Property. In order to
terminate this Lease, Landlord shall deliver written notice to Tenant, which
notice shall specify a termination date at least thirty (30) days and not more
than ninety (90) days from the date thereof. In such event, Landlord shall not
be required to repair, restore or reconstruct the Premises.

            15.2 Allocation of Award. The entire award or compensation,
including interest, whether for a total or partial taking or damaging or for a
diminution in the value of Tenant's leasehold or Landlord's fee or other
interest, shall belong to and be the property of Landlord, and Tenant hereby
assigns to Landlord all of Tenant's interest in any award. Tenant shall have the
right to prove in the proceedings related to the taking or damaging loss of, and
to receive any separate award which may be made for damage to or condemnation
of, Tenant's equipment, trade fixtures, furniture and furnishings, and for
relocation costs and goodwill.

            15.3 Definitions. As used in this Section 15, (i) the term "taking
or damaging" shall include inverse condemnation, or any transfer made in
avoidance of the power of eminent domain; and (ii) the "award"

                                       14
<PAGE>

shall include all monies awarded for a taking or damaging occurring before or
after the commencement of litigation proceedings.

SECTION 16. ASSIGNING - MORTGAGING - SUBLETTING - CHANGE IN OWNERSHIP

            16.1 No Transfer or Sharing Without Consent. Tenant shall not
assign, sublet, enter into a license or concession agreement for, hypothecate or
otherwise divest itself of this Lease or any of its rights hereunder
(collectively, a "transfer of rights") or permit any third party or parties
other than Tenant, its authorized agents, employees, invitees and visitors to
occupy the Premises or any portion thereof (collectively, a "sharing of the
Premises") without Landlord's prior written consent, which consent may be
withheld in Landlord's sole discretion. Unless Landlord expressly agrees
otherwise, Tenant shall not be relieved of any of its duties or obligations
under this Lease as a result of any transfer of rights or sharing of the
Premises, regardless whether consented to by Landlord. Such prohibition against
the transfer of rights shall include any transfer of rights by operation of law.
Any attempted transfer of rights or sharing of the Premises without Landlord's
advance written consent shall constitute a default hereunder and shall be void
ab initio so as not to confer any rights upon any third person. Consent to any
transfer of rights shall not operate as a waiver of the necessity for consent to
any subsequent transfer of rights, and the terms of such consent shall be
binding upon any person holding by, under, or through Tenant. The provisions of
Section 16.2 hereof constitute the sole means by which such consent may be
requested. If a transfer of rights occurs or if there is a sharing of the
Premises, Landlord may collect rent and other charges from such assignee or
other party, and apply the amount collected to the rent and other charges
reserved hereunder, but such collection shall not constitute consent or waiver
of the necessity of consent to such transfer or sharing of the Premises, nor
shall such collection constitute the recognition of such assignee, sublessee, or
other party as the Tenant hereunder or a release of tenant from the further
performance of all of the covenants and obligations of Tenant herein contained.

            Any transfer of this Lease or of Tenant's rights hereunder by
merger, consolidation, transfer of assets or liquidation shall constitute a
transfer of rights. In the event that Tenant is a corporation, an unincorporated
association, or a partnership, the transfer, assignment or hypothecation of any
stock or interest in such corporation, association or partnership in the
aggregate in excess of 49% of the total outstanding stock or interest shall be
deemed a transfer of rights.

            Related Entity: Notwithstanding the provisions of Section 16.1
above, Tenant may assign this Lease or sublet the Premises, or any portion
thereof, without Landlord's consent to any entity resulting from a merger or
consolidation of Tenant with any other entity, (ii) any entity purchasing all or
substantially all of the stock or assets of Tenant, (iii) any entity succeeding
to all or substantially all of the business and all or substantially all of the
assets of Tenant, or (iv) any entity which controls, is controlled by or is
under common control with Tenant, provided that (a) the assignee or sublessee
assumes, in full, the obligations of Tenant under this Lease, (b) Tenant remains
fully liable under this Lease, (c) the use of the Premises under Section 6
remains unchanged, and (d) Landlord shall have received an executed copy of the
assignment or sublease on or before its effective date (e) the net worth of the
entity is equal or greater than Tenant as of the effective date. No change of
stock ownership or control or partnership change, assignment, transfer or
hypothecation of any partnership or other ownership interest in Tenant shall
constitute an assignment hereunder.

            16.2 Procedure for Requesting Consent. If Tenant desires at any time
to effect a transfer of rights or sharing of the Premises it must first notify
Landlord in writing of its desire to do so and shall submit in writing to
Landlord (i) the name of the third party concerned; (ii) the nature of the third
party's business proposed to be carried on in the Premises; (iii) the terms and
provisions of the proposed transfer of rights or sharing of the Premises; and
(iv) such financial and business information as Landlord may reasonably request
concerning the third party. Submission to Landlord by Tenant of an executed
sublease or other document purporting to make a transfer of rights or sharing of
the Premises subject to Landlord's approval shall constitute a request for
Landlord's consent under this Section 16.2.

            16.3 Conditions of Authorization. As conditions precedent to
Landlord's consent to Tenant's transfer of rights or sharing of the Premises,
Landlord may require, without limitation, any or all of the following:

                                       15
<PAGE>

            (a)   Tenant shall reimburse Landlord for Landlord's reasonable
                  attorneys' fees incurred in connection with the review,
                  processing and documentation of such request;

            (b)   If Tenant's transfer of rights or sharing of the Premises
                  provides for the receipt by, on behalf or on account of Tenant
                  of any consideration of any kind whatsoever (including, but
                  not by way of limitation, a premium rental for a sublease or
                  lump sum payment for an assignment) in excess of the rental
                  and other charges due Landlord under this Lease, Tenant shall
                  pay one hundred percent (100%) of said excess to Landlord when
                  such consideration is received by Tenant;

            (c)   In the event of a sublease or sharing of the Premises, the
                  third party shall agree in writing that in the event Landlord
                  gives such third party notice that Tenant is in default under
                  this Lease, such third party shall thereafter make all
                  payments otherwise due Tenant directly to Landlord, which
                  payments will be received by Landlord without any liability of
                  Landlord except to credit such payment against those due under
                  the Lease, and any such third party shall agree to attorn to
                  Landlord or its successors and assigns should this Lease be
                  terminated for any reason; provided however that in no event
                  shall Landlord or its successors or assigns be obligated to
                  accept such attornment;

            (d)   In the case of an assignment of this Lease, the assignee shall
                  agree in writing to assume, be bound by and perform all of the
                  terms, covenants and conditions of this Lease;

            (e)   Tenant shall not then be in default hereunder in any respect;
                  and

            (f)   Tenant shall deliver to Landlord one executed copy of any and
                  all written instruments evidencing or relating to Tenant's
                  transfer of rights or sharing of the Premises.

            16.4 Right of Termination. Notwithstanding any other provision
hereof, in lieu of giving such consent, Landlord may at its election, elect to
(i) construe such proposed transfer of rights or sharing of the Premises as an
offer to Landlord on the same terms and conditions as with the third party,
which offer may be accepted at any time within thirty (30) days after receipt
thereof, and if so accepted, such transfer of rights to or sharing of the
Premises with Landlord shall automatically be deemed consummated on all the
terms and provisions set forth in such proposed transfer (except that Landlord
may further assign or otherwise transfer such interest without Tenant's review
or consent) or (ii) terminate this Lease (or in the case of a proposed
subletting or assignment of a portion of the Premises, elect to terminate this
Lease as respects that portion) upon thirty (30) days' prior notice and release
Tenant from any liability under this Lease (as to that portion of the Premises
involved) accruing after the effective date of such termination.

SECTION 17. SUBORDINATION - ATTORNMENT

            17.1 Subordination. At Landlord's request, Tenant agrees to
subordinate this Lease to the lien of any mortgages or deeds of trust in any
amount hereafter placed on or against the Property and if Landlord elects to
make any such lien subordinate to this Lease, Tenant hereby consents and agrees
to such election. Tenant agrees that at the request of Landlord at any time and
from time to time Tenant shall execute and deliver to Landlord an instrument, in
form reasonably acceptable to Landlord, evidencing such subordination. Tenant
shall not subordinate this Lease to any such lien except at the request or with
the written consent of Landlord. Tenant, at the written request of any person
that acquires Landlord's interest in this Lease by sale, assignment, transfer,
foreclosure, termination of a ground lease or otherwise, shall attorn to such
person and its successors and assigns.

            17.2 Quiet Enjoyment. Upon Tenant paying the Basic Annual Rent and
all Additional Rent and performing all of Tenant's obligations under this Lease,
Tenant may peacefully and quietly enjoy the Premises during the Lease Term as
against all persons or entities lawfully claiming by or through Landlord,
subject, however, to the provisions of this Lease and to any mortgages
encumbering the Property.

                                       16
<PAGE>

SECTION 18. DEFAULT

            The occurrence of any of the following shall constitute Tenant's
breach of and default under this Lease:

            (a)   The failure by Tenant to make any payment of Basic Annual
                  Rent, Additional Rent or pay other sums, taxes and insurance
                  premiums as and when due.

            (b)   Failure by Tenant in the prompt and complete performance and
                  observance of any other express or implied covenant, agreement
                  or obligation of Tenant contained in this Lease and the
                  continuation of such failure for a period of twenty (20) days
                  after notice thereof from Landlord to Tenant, provided,
                  however, that if the nature of Tenant's default is such that
                  more than twenty (20) days are reasonably required for its
                  cure, then Tenant shall not be deemed to be in default if
                  Tenant shall commence such cure within said twenty (20) day
                  period and thereafter diligently prosecute such cure to
                  completion.

            (c)   Any attachment or levy of execution or similar seizure of the
                  Premises or Tenant's fixtures or other property at the
                  Premises or any foreclosure, repossession or sale under any
                  chattel mortgage, security agreement or conditional sales
                  contract covering Tenant's fixtures or other property at the
                  Premises; or the filing by Tenant or any guarantor of this
                  Lease of, or consent to, any petition under any chapter of the
                  Bankruptcy Code or any state proceeding relating to insolvency
                  or protection from creditors, or the adjudication of Tenant or
                  of any guarantor of this Lease as a bankrupt or insolvent; or
                  the appointment of a receiver or trustee to take possession of
                  all or substantially all of the assets of Tenant or of any
                  guarantor of this Lease or a general assignment by Tenant or
                  of any guarantor of this Lease for the benefit of creditors;
                  or any other action taken or consented to by Tenant or by any
                  guarantor of this Lease under any state or federal insolvency
                  or bankruptcy act; or the involuntary filing of a bankruptcy
                  petition or state insolvency action by Tenant or any guarantor
                  of this Lease or appointment of a trustee or receiver for
                  Tenant or any guarantor of this Lease, and the same is not
                  dismissed or stayed within thirty (30) days.

            (d)   The vacation or abandonment of the Premises by Tenant.

SECTION 19. REMEDIES

            19.1 Landlord's Remedies. In the event of default by Tenant under
this Lease, Landlord may, at its option: (1) Terminate Tenant's right to
possession of the Premises because of such breach and recover from Tenant all
damages it may incur by reason of Tenant's default, including, without
limitation, the worth at the time of the award of the amount by which the unpaid
rent for the balance of the Lease Term after the time of award exceeds the
amount of such rental loss that Tenant proved could be reasonably avoided; or
(2) Not terminate Tenant's right to possession because of such breach, but
continue this Lease in full force and effect, in which event Landlord may
enforce all rights and remedies hereunder, including without limitation the
right to recover the Basic Annual Rent and Additional Rent as such becomes due.
In either event Landlord may reenter the Premises and remove all persons and
property from the Premises, storing said property in a public place, warehouse,
or elsewhere at the cost of, and for the account of, Tenant, all without service
of notice or resort to legal process and without being deemed guilty of or
liable in trespass. No such reentry or taking possession of the Leased Premises
by Landlord shall be construed as an election on its part to terminate this
Lease unless a written notice of such intention is given by landlord to Tenant.
No such action by Landlord shall be considered or construed to be a forcible
entry. In addition to, and not in lieu of, any of the remedies provided in this
Section 19.1, Landlord shall be entitled to take any other action and pursue any
other remedy provided at law, in equity or under this Lease. No reentry to,
taking possession of the Premises or other action by Landlord upon or following
the occurrence of any breach or default by Tenant shall be construed as an
election by Landlord to terminate this Lease unless Landlord provides Tenant
written notice of such termination.

            Should Landlord reenter, as provided above, or should it take
possession pursuant to legal proceedings or pursuant to any notice provided for
by Law, and whether or not it terminates this Lease, it may be necessary to
relet the Leased Premises. Landlord may relet the same or any part thereof for
such term or terms

                                       17
<PAGE>

(which may be for a term extending beyond the term of this Lease) and at such
rental or rentals and upon such other terms and conditions as Landlord in its
sole discretion may deem advisable. Upon each such reletting all rentals
received by the Landlord from such reletting shall be applied, first, to the
payment of any costs and expenses of such reletting, including brokerage fees
and attorney's fees and costs of any alterations and repairs; second, to the
payment of any indebtedness other than rent due hereunder from Tenant to
Landlord; third, to the payment of rent due and unpaid hereunder, and the
residue, if any, shall be held by Landlord and applied in payment of future rent
as the same may become due and payable hereunder. If such rentals received from
such reletting during any month shall be less than that to be paid during such
month by Tenant hereunder, Tenant shall pay any such deficiency to Landlord.
Such deficiency shall be calculated and paid monthly.

            19.2 Assignment of Subrents. As additional security for Tenant's
performance of its obligations hereunder, Tenant hereby assigns to Landlord the
right to receive the rents, issues, profits or other payments received under a
transfer of rights or sharing of the Premises by Tenant, reserving unto Tenant
the right prior to any breach or default hereunder to collect and retain said
rents, issues and profits as they become due and payable. Nothing in this
Section 19.2 shall be construed as permitting any transfer of rights or sharing
of the Premises contrary to Section 16.

            19.3 Landlord's Cure of Tenant's Default. If at any time during the
term hereof Tenant fails, refuses or neglects to do any of the things herein
provided to be done by Tenant, Landlord shall have the right but not the
obligation to do the same, but at the cost and for the account of Tenant. The
amount of any money so expended or obligations so incurred by Landlord together
with interest thereon at the lesser of eighteen percent (18%) per annum or the
maximum interest rate permitted by law shall be repaid to Landlord immediately
upon demand therefor, and unless so paid shall be added to the next monthly
payment coming due hereunder and shall be payable as rent.

            19.4 Interest and Charges on Past Due Obligations. Any amount due
from Tenant to Landlord hereunder which is not paid when due shall bear interest
at the lesser of eighteen percent (18%) per annum or the maximum lawful rate of
interest from the due date until paid, unless otherwise specifically provided
herein. In addition to such interest, if an installment of Basic Annual Rent is
not paid within five (5) days after the same is due, a late charge equal to four
percent (4%) of the amount overdue or One Hundred Dollars ($100), whichever is
greater, shall be assessed.

SECTION 20. RULES AND REGULATIONS

            Tenant shall faithfully observe and strictly comply with the rules
and regulations set forth in Exhibit "E" hereto. Said rules and regulations may
be deleted, amended or supplemented by Landlord from time to time with such
other rules and regulations as Landlord may reasonably adopt for the safety,
care, and cleanliness of the Building and the Property and the facilities
thereof, or the preservation of good order therein. Landlord shall not be liable
to Tenant for violation by any other tenant in the Building of any such rules
and regulations, or for breach of any covenant or condition in any lease.
Landlord has not represented and is not hereby representing that all tenants in
the Building are or shall be bound to any part or all of such rules and
regulations.

SECTION 21. SURRENDER OF PREMISES

            Upon the expiration or sooner termination of the term of this Lease,
Tenant shall surrender the Premises in as good condition as when received,
reasonable wear and tear excepted, broom clean and free of trash and rubbish,
and free from all tenancies or occupancies by any person. Tenant shall remove
all trade fixtures, furniture, equipment and other personal property installed
in the Premises prior to the expiration or earlier termination of this Lease.
Tenant shall, at its own cost, completely repair any and all damage to the
Premises and the Building resulting from or caused by such removal. If Tenant
fails to remove such items upon the expiration of this Lease, the same shall be
deemed abandoned and shall become the property of Landlord. Landlord shall not
be deemed to have accepted any surrender of the Premises to Landlord prior to
the end of the Lease Term, unless Landlord has agreed and acknowledged, in
writing, that it has accepted such surrender.

                                       18
<PAGE>

SECTION 22. HOLDING OVER

            Should Tenant, with or without Landlord's written consent, hold over
after the expiration of this Lease, Tenant shall pay, in advance, monthly rent
at the rate of one hundred fifty percent (150%) of one month's Basic Annual
Rent, plus all Additional Rent provided by this Lease.

SECTION 23. NOTICES

            Any notice required or permitted to be given hereunder shall be in
writing and shall be deemed effective either upon personal delivery, or receipt
thereof when deposited in the United States mail, registered or certified
delivery, return receipt requested, addressed to the Tenant at the Premises or
to Landlord or Tenant at the location stated in Item 13 of the Basic Lease
Provisions. Either party may specify a different address for notice purposes in
the manner aforesaid. A copy of all notices to be given to Landlord hereunder
shall be concurrently transmitted by Tenant to any additional party hereafter
designated by a notice from Landlord to Tenant. Notwithstanding the foregoing,
if either party refuses to accept or sign the return receipt for any notice
tendered to it pursuant to this Section 23, such notice shall be deemed
effective when tendered.

SECTION 24. ESTOPPEL CERTIFICATES

            Landlord or Tenant shall, at any time and from time to time, upon
not less than ten (10) days' prior notice from the other party, execute,
acknowledge and deliver to the party requesting a statement in substantially the
form and substance as the Estoppel Certificate attached hereto as Exhibit "F",
plus other information reasonably requested by a potential purchaser or
mortgagee. Landlord's or Tenant's failure to deliver such statement within such
time shall, at the option of Landlord or Tenant, constitute a default under this
Lease and, in any event, shall be conclusive upon Landlord or Tenant that this
Lease is in full force and effect without modification except as may be
represented by Landlord or Tenant in any such certificate prepare by Landlord or
Tenant and delivered to Landlord or Tenant for execution.

SECTION 25. LIABILITY OF LANDLORD

            In the event of any transfer or transfers of Landlord's interest in
the Premises, other than a transfer for security purposes only, Landlord shall
be automatically relieved of any and all obligations and liabilities hereunder
from and after the date of such transfer, it being intended hereby that the
covenants and obligations contained in this Lease on the part of Landlord shall
be binding on Landlord only during and in respect of its ownership. The
transferee of Landlord's interest in this Lease shall be deemed automatically
without further agreement to have assumed all of Landlord's duties and
obligations hereunder. Tenant agrees to look solely to Landlord's estate and
interest in the Property for the satisfaction of any remedy of Tenant for the
collection of a judgment (or other judicial process) requiring the payment of
money by Landlord in the event of any default by Landlord hereunder, and no
other property or assets of Landlord or of any partner, officer, director,
shareholder, agent or employee of Landlord shall be subject to levy, execution
or other enforcement procedure for the satisfaction of Tenant's remedies under
or with respect to this Lease, the relationship of Landlord and Tenant
hereunder, or Tenant's use or occupancy of the Premises.

SECTION 26. LANDLORD'S INABILITY TO PERFORM

            This Lease and the obligations of Tenant hereunder shall not be
affected or impaired because Landlord is unable to fulfill any of its
obligations hereunder or is delayed in doing so, if such inability or delay is
caused by reason of the unavailability of materials, strike or other labor
troubles or any other cause beyond the reasonable control of Landlord. Landlord
shall not be deemed to be in default in the performance of any obligation
required to be performed by it hereunder unless and until it has failed to
perform such obligation within thirty (30) days after notice by Tenant to
Landlord specifying wherein Landlord has failed to perform such obligation;
provided, however, that if the nature of Landlord's obligation is such that more
than thirty (30) days are required for its performance, then Landlord shall not
be deemed to be in default if it shall commence such performance within such
thirty (30) day period and thereafter prosecute same to completion.

                                       19
<PAGE>

SECTION 27. ATTORNEYS' FEES

            If Landlord or Tenant initiates any action to enforce any provision
of this Lease as a result of any breach or default on the part of Landlord or
Tenant, the losing party shall pay to the prevailing party all costs and
expenses, including reasonable attorneys' fees, incurred therein by Landlord or
Tenant.

SECTION 28. GENERAL PROVISIONS

            28.1 Headings and Definitions. The Section headings contained in
this Lease are for convenience of reference only and do not in any way govern
the construction thereof. The terms "Landlord" and "Tenant" as used herein shall
include the plural as well as the singular, and the neuter shall include the
masculine and feminine genders. The words "person" and "persons" whenever used
shall include individuals, firms, associations and corporations.

            28.2 Covenants and Agreements - Time of the Essence. Each of
Tenant's covenants and agreements herein contained are independent and not
dependent on Landlord's performance of its obligations hereunder, and the time
of the performance of each is of the essence of this Lease.

            28.3 Successors and Assigns. All of the covenants, conditions and
provisions of this Lease shall be binding upon and shall inure to the benefit of
the parties hereto and their respective heirs, personal representatives,
successors and assigns, subject to Section 16 hereof.

            28.4 Interpretation. The language in all parts of this Lease shall
be in all cases construed simply according to its fair meaning, and not strictly
for or against Landlord or Tenant. Any provision of this Lease which shall prove
to be invalid, void or illegal shall in no way affect, impair or invalidate any
other provision hereof and such other provisions shall remain in full force and
effect. This Lease may be executed in any number of counterparts, each of which
shall be an original and all of which together shall constitute and be construed
as one and the same instrument. This Lease shall be governed by and construed in
accordance with the laws of the State of Utah. All Exhibits and addenda
referenced or attached hereto are incorporated herein by reference as though
fully set forth herein.

            28.5 Waiver and Default. No waiver by Landlord of any provision of
this Lease shall be deemed to be a waiver of any other provision hereof or of
any subsequent breach by Tenant of the same or any other provision. No delay on
the part of Landlord in exercising any of its rights hereunder shall operate as
a waiver of such rights or of any other right of Landlord, nor shall any delay,
omission or waiver on any one occasion be deemed a waiver of the same or any
other right on any other occasion, nor shall Landlord's receipt from Tenant of
any sum with knowledge of any breach by Tenant of any of its covenants hereunder
be deemed to be a waiver of such breach. Neither Landlord's failure to bill
Tenant for any rent or other sum payable hereunder as it becomes due hereunder,
nor its error in such billing or failure to provide any other documentation in
connection therewith, shall operate as a waiver of Landlord's right to collect
any such rent or other sum payable hereunder which may have at any time become
due hereunder in the full amount to which Landlord is entitled pursuant to the
terms and provisions hereof. Landlord's consent to or approval of any act by
Tenant requiring Landlord's consent or approval, including approvals under
Section 16, shall not be deemed to render unnecessary the obtaining of
Landlord's consent to or approval of any subsequent act of Tenant whether or not
similar to the act so consented to or approved. None of Landlord's agents shall
have any power to accept the keys to the Premises prior to the termination of
this Lease, and the delivery of the keys to any such employee shall not operate
as a termination of this Lease or a surrender or Landlord's acceptance of the
Premises.

            28.6 Entire Agreement: Amendments. This Lease and the exhibits and
any riders attached hereto constitute the entire agreement between the parties
hereto with respect to the subject matter hereof, and no prior agreement or
understanding pertaining to any such matter shall be effective for any purpose.
No provision of this Lease may be amended or supplemented except by an agreement
in writing signed by the party or parties to be bound thereby.

            28.7 Building Name. Landlord reserves the right to change the name
of the Building from time to time during the term of this Lease. Tenant shall
not be allowed to use the name, picture or representation

                                       20
<PAGE>

of the Building, or words to that effect, in connection with any business
carried on in the Premises or otherwise (except as Tenant's address) without the
prior written consent of Landlord.

            28.9 Brokers. In connection with this Lease, Tenant warrants and
represents that it has had dealings only with the Brokers specified in Item 10
of the Basic Lease Provisions and that it knows of no other person who is or
might be entitled to a commission, finder's fee or other like payment in
connection herewith and does hereby indemnify and agree to hold Landlord
harmless from and against any and all loss, liability and expenses including any
attorneys' fees that Landlord may incur should such warranty and representation
prove incorrect.

            28.10 No Option. The submission of this Lease by Landlord, its agent
or representative for examination or execution by Tenant does not constitute an
option or offer to lease the Premises upon the terms and conditions contained
herein or a reservation of the Premises in favor of Tenant, it being intended
hereby that this Lease shall only become effective upon the execution hereof by
Landlord and delivery of a fully executed counterpart hereof to Tenant.

            28.11 Corporate and Partnership Tenant. In the event Tenant is a
corporation or a partnership, the parties executing this Lease on behalf of
Tenant hereby covenant and warrant, individually and on behalf of Tenant, that
Tenant is duly organized and in good standing in the state of its incorporation
or organization and that all steps have been taken prior to the date hereof to
qualify Tenant to do business in Utah, that Tenant has duly authorized this
Lease by all requisite corporate or partnership action and that the persons
executing this Lease have been duly authorized by Tenant to do so on its behalf.

            28.12 Recordation of Lease. Neither this Lease nor any memorandum
hereof shall be recorded by Tenant.

            28.13 Multiple Parties. If there is more than one person, firm,
corporation, partnership or other entity comprising Tenant, then (i) the term
Tenant, as used herein, shall include all of such persons, firms, corporations,
partnerships and other entities; (ii) each and every provision in this Lease
shall be binding on each and every one of them; (iii) each of them shall be
jointly and severally liable hereunder; (iv) Landlord shall have the right to
join one or all of them in any proceeding or to proceed against them in any
order; and (v) Landlord shall have the right to release any one or more of them
without in any way prejudicing its right to proceed against the others.

            28.14 No Partnership. Landlord does not by this Lease, in any way or
for any purpose, become a partner or joint venturer of Tenant in the conduct of
its business or otherwise.

            28.15 Telecommunications Equipment and HVAC. At any time during the
Lease Term, subject to availability, Tenant may install and maintain, at
Tenant's sole cost and expense, telecommunication equipment and/or an HVAC unit
("HVAC") upon the roof of the Building, subject to the payment of the prevailing
Building rates for the same. Upon thirty (30) days prior notice from Tenant to
Landlord, Landlord shall designate areas on the roof of the Building or other
areas of the Property which Tenant may lease for the purpose of installation,
operation and maintenance of (I) the HVAC and (ii) a satellite antenna or other
broadcasting and receiving device and the telecommunications conduits, devices,
fibreoptics and electrical, coaxial and other connections necessary to connect
the transmission devices to the Premises (collectively, the "Telecommunication
Devices"). Tenant shall have the right to use the Building utilities located on
the roof of the Building for the operation of the Telecommunication Devices and
HVAC at Tenant's sole cost and expense. Tenant shall have the right to access
the Telecommunication Devices and HVAC upon reasonable prior written notice to
Landlord, during business hours and subject to Landlord's reasonable rules and
regulations. Upon the expiration or earlier termination of this Lease, or at
such time as Tenant elects to stop paying for the use of space for the
Telecommunication Devices and/or HVAC, Tenant shall remove, at its own cost and
expense, the Telecommunications Devices and HVAC and all related facilities
thereof. If Tenant shall fail to complete such removal and/or fail to repair any
damage caused thereby, Landlord may do so and charge the cost thereof to Tenant
as Additional Rent. The physical appearance and size of the Telecommunication
Devices and HVAC shall be subject to Landlord's reasonable approval and Landlord
may require Tenant to install screening around such equipment, at Tenant's sole
cost and expense, as reasonably designated by Landlord. All Telecommunication
Devices and the HVAC must be compatible with the Building's systems and shall
not impair window washing or the use of chiller units, the cooling tower or
emergency generator, elevator machine rooms, helipads, ventilation

                                       21
<PAGE>

shafts, if any, or any other parts of the Building. The plans and specifications
for the Telecommunication Devices and HVAC and all working drawings for the
installation of the Telecommunication Devices and HVAC shall be subject to the
reasonable prior written approval of Landlord and Tenant obtaining any and all
required permits and governmental approvals, at Tenant's sole cost and expense.
If Tenant elects to install Telecommunication Devices or HVAC, Tenant's
indemnity obligation and waiver set forth in Section 12 of this Lease shall also
cover the use and installation of the Telecommunication Devices and HVAC. In
addition, Tenant shall procure and maintain at Tenant's sole cost and expense,
such insurance, in addition to the Qinsurance required to be maintained by
Tenant under this Lease, in connection with the Telecommunication Devices as
reasonably determined by Landlord. The Telecommunication Devices and the HVAC,
and the installation thereof shall comply with all applicable laws.

Notwithstanding the proceeding, Landlord hereby agrees to provide upon the
commencement of this Lease, a suitable location for Tenant's back-up generator,
HVAC and conduit allowing Tenant to cross connect with the fiberoptic providers
on the Property.

LANDLORD:                                 TENANT:

PARKSIDE SALT LAKE CORPORATION            ADVANCED TELECOMMUNICATIONS, INC.

                                                                     PLEASE SIGN
                                                                       & DATE

By: /s/ [ILLEGIBLE]              RM       By: /s/ Satish C. Tiwari
    -------------------------------           ----------------------------------

Its: Asset Manager                        Its:       SATISH C. TIWARI
     ------------------------------                 V.P. ENGINEERING AND
                                                   NETWORK IMPLEMENTATION
                                             ADVANCED TELECOMMUNICATIONS, INC.
                                                 730 2ND AVE S. SUITE 1200
                                                   MINNEAPOLIS, MN 55402

Date: 1-11-2000                           Date: 12/30/1999
      -----------------------------             --------------------------------

                                       22
<PAGE>

                                   EXHIBIT "A"

                          LEGAL DESCRIPTION OF PROPERTY

PARCEL NO. 1

Beginning at the northwest corner of Lot 5, Block 56, Plat "A", Salt Lake City
Survey, and running thence east 231.00 feet; thence south 231.00 feet; thence
west 66.00 feet; thence south 99.00 feet; thence west 66.00 feet; thence north
50.33 feet; thence west 99.00 feet; thence north 279.67 feet to the point of the
beginning.

            Contains 64,713.33 sq. ft.
              or 1.4856 Acres

PARCEL NO. 2

Beginning at a point east 51.00 feet and south 154.00 feet from the northwest
corner of Lot 7, Block 56, Plat "A" Salt Lake City Survey, and running thence
south 64.83 feet; thence west 51.00 feet; thence south 61.67 feet; thence west
81.00 feet; thence 126.50 feet; thence east 132.00 feet to the point of
beginning.

            Contains 13.552.83 sq. ft
              or 0.3111 Acres

                                       23
<PAGE>

                                   EXHIBIT "B"
                          AS-BUILT DRAWING OF PREMISES

Floor(s): 3rd
Suite Number: 380

                               [GRAPHIC OMITTED]

                                       24
<PAGE>

                                   EXHIBIT "C"

                MEMORANDUM OF COMMENCEMENT DATE AND RENTABLE AREA

Commencement Date: _________________________________
Rentable Area: ____________________________________________ square feet
Basic Annual Rent: $_______________________________________ Year 1
                   $_______________________________________ Year 2
                   $_______________________________________ Year 3
                   $_______________________________________ Year 4
                   $_______________________________________ Year 5
                   $_______________________________________ Year 6
                   $_______________________________________ Year 7
                   $_______________________________________ Year 8
                   $_______________________________________ Year 9
                   $_______________________________________ Year 10

(LANDLORD AND TENANT HEREBY AGREE that, upon execution of this Exhibit "C", the
determination of "Rentable Area" set forth herein shall be binding upon the
parties throughout the term of the Lease, regardless of any discrepancies which
may be shown by subsequent measurements.)

LANDLORD:                              TENANT:

PARKSIDE SALT LAKE CORPORATION         ADVANCED TELECOMMUNICATIONS, INC.

By:___________________________         By:______________________________

Its:__________________________         Its:_____________________________

Date:_________________________         Date:____________________________

                                       25
<PAGE>

                                   EXHIBIT "D"

                               TENANT WORK LETTER

                                 PARKSIDE TOWER
                                 215 SOUTH STATE
                              SALT LAKE CITY, UTAH

This "Work Letter Agreement" shall set forth the terms and conditions relating
to the construction of certain tenant improvements in the Premises. All
references in this Work Letter Agreement to Sections of the Lease shall mean the
relevant portion of Sections 1 through 28 of that certain Office Building Lease
to which this Work Letter Agreement is attached as Exhibit "D" and of which this
Work Letter Agreement forms a part, and all references in this Work Letter
Agreement to Sections of "this Work Letter Agreement" shall mean the relevant
portion of Sections 1 through 6 of this Work Letter Agreement.

                                    SECTION 1

                                  BASE BUILDING

      1.1 Base Building. Landlord owns and, through its advisors, agents,
representatives and employees, operates the base building in which the Premises
is located (collectively, the "Base Building"). Except as otherwise specifically
provided in this Lease, Tenant shall and does hereby accept the Base Building in
its presently existing, as-is condition.

                                    SECTION 2

                               TENANT IMPROVEMENTS

      2.1 Tenant Improvement Allowance. Tenant shall be entitled to a one-time
tenant improvement allowance (the "Tenant Improvement Allowance") in the amount
of $10.00 per usable square foot of the Premises or $57,960.00 for the costs
relating to improvements made to the Premises (collectively, the "Tenant
Improvements"). In no event, however, shall Landlord be obligated to make
disbursements pursuant to this Work Letter Agreement in a total amount which
exceeds the Tenant Improvement Allowance. To the extent the Tenant Improvement
Allowance exceeds the cost of the Tenant Improvements, Landlord shall be
entitled to keep and retain that portion of the Tenant Improvement Allowance
that exceeds the Tenant Improvements and Tenant shall not be entitled to the
same. Additionally, all cost over and above the Tenant Improvement Allowance
shall be the sole responsibility of Tenant.

      2.2 Disbursement of the Tenant Improvement Allowance. Except as otherwise
set forth in this Work Letter Agreement and subject to Section 2.1 of this Work
Letter Agreement, the Tenant Improvement Allowance shall be disbursed by
Landlord upon the following: (i) substantial completion of the Tenant
Improvements, (ii) presentment of invoice(s) from Tenant, and (iii) lien waivers
from all contractors and/or subcontractors. The Tenant Improvement Allowance
shall be for costs related to the Tenant Improvements and for the "Landlord
Supervision Fee," as that term is defined in Section 4.3.2 of this Work Letter
Agreement (collectively, the "Tenant Improvement Allowance Items").

                                    SECTION 3

                              CONSTRUCTION DRAWINGS

      3.1 Selection of Architect/Construction Drawings. Tenant shall retain the
architect/space planner designated by Landlord (the "Architect") to prepare the
"Construction Drawings," as that term is defined in this Section 3.1. Tenant
shall retain the engineering consultants designated by Landlord (the
"Engineers") to prepare all plans and engineering working drawings relating to
the structural, mechanical, electrical, plumbing, HVAC, lifesafety, and
sprinkler work of the Tenant Improvements. The plans and drawings to be prepared
by Architect and the Engineers hereunder shall be known collectively as the
"Construction Drawings." All Construction Drawings shall comply with the drawing
format and specifications as determined by Landlord, and shall be subject to
Landlord's approval, which shall not be unreasonably withheld or delayed. Tenant
and Architect shall verify, in the field, the dimensions and conditions as shown
on the relevant portions of the base Building

                                       26
<PAGE>

plans, and Tenant and Architect shall be solely responsible for the same, and
Landlord shall have no responsibility in connection therewith. Landlord's review
of the Construction Drawings as set forth in this Section 3, shall be for its
sole purpose and shall not imply Landlord's review of the same, or obligate
Landlord to review the same, for quality, design, Code compliance or other like
matters. Accordingly, notwithstanding that any Construction Drawings are
reviewed by Landlord or its space planner, architect, engineers and consultants,
and notwithstanding any advice or assistance which may be rendered to Tenant by
Landlord or Landlord's space planner, architect, engineers, and consultants,
Landlord shall have no liability whatsoever in connection therewith and shall
not be responsible for any omissions or errors contained in the Construction
Drawings, and Tenant's waiver and indemnity set forth in this Lease shall
specifically apply to the Construction Drawings.

      3.2 Final Space Plan. Tenant and the Architect shall prepare the final
space plan for Tenant Improvements in the Premises (collectively, the "Final
Space Plan"), which Final Space Plan shall include a layout and designation of
all offices, rooms and other partitioning, their intended use, and equipment to
be contained therein, and shall deliver the Final Space Plan to Landlord for
Landlord's approval, which shall not be unreasonably withheld or delayed

      3.3 Final Working Drawings. Tenant, the Architect and the Engineers shall
complete the architectural and engineering drawings for the Premises, and the
final architectural working drawings in a form which is complete to allow
subcontractors to bid on the work and to obtain all applicable permits
(collectively, the "Final Working Drawings") and shall submit the same to
Landlord for Landlord's approval, which shall not be unreasonably withheld or
delayed

      3.4 Permits. The Final Working Drawings shall be approved by Landlord (the
"Approved Working Drawings") prior to the commencement of the construction of
the Tenant Improvements. "Contractor" as identified in Section 1 above and as
that term is defined in Section 4.1 below, shall immediately submit the Approved
Working Drawings to the appropriate municipal authorities for all applicable
building permits necessary to allow Contractor, to commence and fully complete
the construction of the Tenant Improvements (the "Permits") and, in connection
therewith, Contractor shall coordinate with Landlord in order to allow Landlord,
at its option, to take part in all phases of the permitting process and shall
supply Landlord, as soon as possible, with all plan check numbers and dates of
submittal and obtain the Permits. Notwithstanding anything to the contrary set
forth in this Section 3.4, Tenant hereby agrees that neither Landlord nor
Landlord's consultants shall be responsible for obtaining any building permit or
certificate of occupancy for the Premises and that the obtaining of the same
shall be Contractor's responsibility; provided however that Landlord shall, in
any event, cooperate with Contractor in executing permit applications and
performing other ministerial acts reasonably necessary to enable Contractor to
obtain any such permit or certificate of occupancy. No changes, modifications or
alterations in the Approved Working Drawings may be made without the prior
written consent of Landlord, which shall not be unreasonably withheld or delayed

                                    SECTION 4

                    CONSTRUCTION OF THE TENANT IMPROVEMENTS

      4.1 Contractor. Tenant shall select one (1) or more contractors (the
"Bidding Contractors") from the list of approved contractors provided Tenant by
Landlord, to bid or quote on the construction of the Tenant Improvements.

      4.2 Cost Proposal. Tenant shall solicit bids or quotes from the Bidding
Contractors for the construction of the Tenant Improvements, which cost
proposals or quotations shall include, as nearly as possible, the cost of all
Tenant Improvement Allowance Items to be incurred by Tenant in connection with
the construction of the Tenant Improvements. Tenant shall approve and select the
cost proposal(s) or quotations (collectively, "Cost Proposal(s)") of the Bidding
Contractor(s) whom Tenant elects to retain to construct the Tenant Improvements
("Contractor(s)") and Tenant shall deliver originals or copies of the selected
Cost Proposal(s) and notice of its selection of the Contractor(s) to Landlord
within five (5) business days of the receipt of the cost proposals. Thereafter,
Tenant shall be released to purchase the items set forth in the Cost Proposal(s)
and to commence the construction relating to such items.

                  4.3.2 Tenant's Retention of Contractor. Tenant shall
independently retain the Contractor(s), to construct the Tenant Improvements and
Landlord shall supervise the construction by the Contractor(s), and Tenant

                                       27
<PAGE>

shall pay (and/or the Tenant Improvement Allowance shall be charged) a
construction supervision and management fee ("Landlord Supervision Fee") to
(and/or for) Landlord in an amount equal to the product of (i) five (5%) percent
of the Tenant Improvements.

Contractor's Warranties and Guaranties. Tenant hereby waives all claims against
Landlord relating to, or arising out of the construction of, the Tenant
Improvements.

                  4.3.4 Tenant's Covenants. Tenant hereby indemnifies Landlord
for any loss, claims, damages or delays arising from the actions of Architect on
the Premises or in the Building. Within ten (10) days after completion of
construction of the Tenant Improvements, Tenant shall cause Contractor and
Architect to cause a Notice of Completion to be recorded in the office of the
County Recorder of the county in which the Building is located in accordance
with any successor statute and furnish a copy thereof to Landlord upon
recordation, failing which, Landlord may itself execute and file the same on
behalf of Tenant as Tenant's agent for such purpose. In addition, immediately
after the Substantial Completion of the Premises, Tenant shall have prepared and
delivered to the Building a copy of the "as built" plans and specifications in
reproducible form (including all working drawings) for the Tenant Improvements.

                                    SECTION 5

                                  MISCELLANEOUS

      6.1 Tenant's Lease Default. Notwithstanding any provision to the contrary
contained in this Lease, if an event of default as described in Section 18 of
the Lease, or a default by Tenant under this Work Letter Agreement, has occurred
at any time, then (i) in addition to all other rights and remedies granted to
Landlord pursuant to the Lease, Landlord shall have the right to withhold
payment of all or any portion of the Tenant Improvement Allowance and/or
Landlord may cause the Contractor(s) to cease the construction of the Premises,
and (ii) all other obligations of Landlord under the terms of this Work Letter
Agreement shall be forgiven until such time as such default is cured pursuant to
the terms of the Lease.

LANDLORD:                                 TENANT:

PARKSIDE SALT LAKE CORPORATION            ADVANCED TELECOMMUNICATIONS, INC.

                                                                     PLEASE SIGN
                                                                       & DATE

By: /s/ [ILLEGIBLE]              RM       By: /s/ Satish C. Tiwari
    -------------------------------           ----------------------------------

Its: Asset Manager                        Its:       SATISH C. TIWARI
     ------------------------------                 V.P. ENGINEERING AND
                                                   NETWORK IMPLEMENTATION
                                             ADVANCED TELECOMMUNICATIONS, INC.
                                                 730 2ND AVE S. SUITE 1200
                                                   MINNEAPOLIS, MN 55402

Date: 1-11-2000                           Date: 12/30/1999
      -----------------------------             --------------------------------

                                       28
<PAGE>

                    Standard Building Specifications/Finishes

I.    PARTITIONS

      A.    Demising Partitions:
            1.    3 5/8" - 25 gauge metal studs at 16" on center.
            2.    5/8" drywall, one layer each side from floor slab to underside
                  of structure. (One hour fire rated assembly.)
            3.    3 1/2" - Batt insulation in wall cavity (R11 rating).
            4.    Partition to be taped and finished smooth to receive paint.
                  Penetrations through walls shall be sealed and openings shall
                  be fire rated as required by local building codes.
            5.    The end of the demising walls must occur at a building column
                  or at a vertical window mullions sealed off as detailed.

      B.    Interior Partitions:
            1.    3 5/8" - 25 gauge metal studs at 16" on center.
            2.    5/8" drywall, one layer each side floor to ceiling.
            3.    Partition to be taped and finished smooth ready to paint.
            4.    Interior partitions that end into glazing or vertical mullion
                  are to be finished as shown.
            5.    Partition height from floor to lay-in ceiling.
            6.    Options:
                  a.    Insulation - fiberglass, batt
                  b.    Insulation - sound attenuation, bat

II.   DOORS/FRAMES/HARDWARE

      A.    Corridor Door Assembly
            1.    Doors - Premium Grade - 3'-0" x 8'-4" x 1 3/4", 1/3 hour
                  rated.
                  a.    solid core, plain sliced red oak, matching hardwood
                        vertical edges.
                  b.    5-ply, 1/50" (min.) veneer, pre-machined
                  c.    Manufacturers: Algoma Hardwoods, Eggers. and Weyerhauser
            2.    Frames - 18 gage, 1/3 hour rated, hollow metal frames painted
                  to match stain finish color.
            3.    Side light - 2' wide per door leaf.

            4.    Glazing -
                  a.    1/4" wired glass. (Diamond or square pattern subject to
                        availability.)
                  b.    Size of glass as selected from standard door types.

            5.    Hinges -
                  a.    Two pairs of 4 1/2" x 4 1/2" ball bearing, butt hinges.
                  b.    Finish to match locksets.
                  c.    Hager 1279 or Stanley FBB 179.

            6.    Locksets -
                  a.    Schlage - Series "D"
                        (1)   Finish - (Choose one)
                              (a)   Satin chromium 626.
                              (b)   Bright Brass 605
                        (2)   Trim - (Choose one)
                              (a)   Knob - Orbit
                              (b)   Lever trim - Athens

            7.    Stops - Quality - Walls, 302 series, floor #431ES, finish to
                  match lockset
            8.    Door closer -
                  a.    Type Parallel arm.
                  b.    Finish - to match locksets

                                       29
<PAGE>

                  c.    Manufacture:
                        (1)   Sargent 1251-UO
                        (2)   Norton 7400 series.

            9.    OPTIONS:
                  a.    Additional corridor doors same as above, minimum. (Door
                        lite not required.)
                  b.    Dead bolts - Schlage Series "B400" 6-pin cylinder

      B.    Interior Door Assembly
            1.    Doors - Premium Grade, 3'-0" x 8'-4" x 1 3/4".
                  a.    Solid core, plain sliced red oak, matching hardwood
                        vertical edges
                  b.    5-ply 1/50" (mn.) veneer, pre-machined
                  c.    Manufactures: Algoma Hardwoods, Eggers, and Weyerhausers
            2.    1" (nominal) oak frame and casing stained and finished to
                  match doors.
            3.    Hinges -
                  a.    Two pairs of 4 1/2" x 4 1/2" butt hinges.
                  b.    Finish - to match lockset finish.
                  c.    Hager 1279 or Stanley FBB 179.
            4.    Latch/Trimset -
                  a.    Schlage - "MD" Designer series (Passage only - Roma)
                        (1)   Finish - Bright Brass 605
                        (2)   Locking function: Dead bolt
            5.    Stops - as manufactured by, Quality
                  a.    Walls - 302 series.
                  b.    Floor #431ES.
                  c.    Stainless steel finish.
            6.    Side Lite - 2' wide per door
            7.    OPTIONS:
                  a.    Door Closers
                        (1)   Type Parallel arm
                        (2)   Finish - to match lockset.
                        (3)   Sargent 125l-UO or Norton 7400 series.

                                       30
<PAGE>

III.  FINISHES:

      A.    Painting -
            1.    One coat of interior wall primer, tinted to match finish
                  color.
            2.    Two coats of satin interior alkyd paint applied with a roller.
            3.    Building standard colors. (Pratt & Lambert, Accolade interior
                  Semi-Gloss Latex, Calibrated Colors IV or equal).
      B.    Clear Finish Over Stained Wood -
            1.    Polyurathane, two coats on stained hardwood.
      C.    OPTIONS:
            1.    Wall Coverings
                  a.    Paneling - Solid wood stained to match color scheme.
                  b.    Vinyl Wall Covering - 13/oz/sq. yd. minimum.
                  c.    Fabric wall covering
                        (1)   100% Marquesa Lana.
                        (2)   13.2 oz/sq. yd. minimum.
                  d.    Others as approved by owner.

IV.   FLOOR COVERING
      A.    Carpet -
            1.    Weight - 36 oz minimum.
            2.    Style - Cut pile, 100% Techni-lon nylon.
            3.    10 year wear warranty.
            4.    Manufacturer - Charleston Carpets
                  a.    Belvedere.
                  b.    Harcourt.
            5.    Colors - See samples for Building Standard Colors Allowance:
      B.    Floor tile - (Reception, Lobby areas.)
            1.    12 x 12 x 3/8 marble, ceramic, or stone tiles.
      C.    Vinyl Composition Tile -
            1.    Manufacturer - Armstrong.
                  a.    Imperial
      D.    Option:
            1.    Carpet border
                  a.    Manufacturer and choices same as above.
            2.    Pad - 5.16" Steiner-Liff "Nova" pad, 6.5# per cubic foot.
            3.    Hardwood flooring - Type and color as approved.
            4.    Carpet accents or upgrades must meet or exceed minimum
                  requirement of standard as approved by owner.

V.    Base

      A.    Corridor -
            1.    4" stained hardwood to match elevator lobby stain color
            2.    4" cast stone to match elevator, Dal-Tile Granite
      B.    Tenant Space -
            1.    4" coved rubber by Roppe - continuous with pre-molded exterior
                  corners.
            2.    3 1/2" stained hardwood. (Corridors, conference rooms, etc.)
            3.    Options:
                  a.    4" marble or cast stone base.

VI.   ACOUSTIC CEILING

      A.    Ceiling height 8'-6".
      B.    Ceiling tile -
            1.    Omni Fissured.
            2.    5/8" X 2'x 2' mineral lay-in tiles.

                                       31
<PAGE>

            3.    Celotex or USG.
      C.    Acoustical suspension system -
            1.    Flat white by Donn Corp or equal.
      D.    OPTIONS:
            1.    Ceiling tile -
                  a.    Natural issured cast product.
                  b.    3/4" x 2' x 2' mineral lay-in tiles.
                  c.    Celotex or USG.
            2.    Sound attenuation tile blankets -

VII.  WINDOW COVERING

      A.    Levelor 1" Mini-Blinds, Color black.
      B.    OPTIONS:
            1.    Interior window covering.
                  a.    Mini-blinds - Levelor 1"
                  b.    Vertical - Levelor 4"
                  c.    Curtain Hardware -
                        (1)   "Super Fine" Kirsch Co.
                        (2)   601 Sanes Graber Industries, Inc.

VIII. CABINETS

      A.    OPTIONS:
            1.    Shelving and brackets. (Exposed to View)
                  a.    Stained hardwood plywood with solid hardwood edge.
            2.    Counter tops.
                  a.    Wilsonart horizontal grade color as approved by Owner.
                  b.    Edging shall be a manufactured hardwood edge as approved
                        by Owner.
            3.    Kitchen type cabinets.
                  a.    Interiors -
                        (1)   Prefinished plastic coated high density particle
                              board. (Kortron or approved equal.)
                        (2)   Stained plywood.
                        (3)   Parts exposed to view to match doors.
                                    b.    Doors -
                                    (1)   Stained solid hardwood.
                                    (2)   Plastic laminate faced millwork.

IX.  PLUMBING
      A.    OPTIONS:
      1.    Toilet Room.
            a.    Fixtures - shall be stainless steel.
      2.    Kitchen/Break Rooms
            a.    Sinks - shall be stainless steel.
            b.    Refrigerator
            c.    Microwave oven
            d.    Dishwasher
      3.    Piping -
            a.    Supply lines - as per state and local building codes.
            b.    Waste and vent lines - as per state and local building codes.

X.    FIRE SPRINKLERS

A.    Chrome semi-recessed heads. Installed per state and local codes.
B.    Escutcheons and trim shall be chrome to match existing.

                                       32
<PAGE>

XI.   HEATING & AIR CONDITIONING DISTRIBUTION

A.    Supply Air Diffusers - Slot type, clear anodized.
B.    Return Air Grille - 2'x 2' perforated grille, white.
C.    Thermostats, Distribution Duct Work - as per building standards
      throughout.

XII.  LIGHTING

A.    Light Fixtures
            1.    Corridors - Day-Brite, 2'x 2' fluorescent, 2 tube,
            Catalog #PGC222-P16S22-ESB, 277 Volts 100 Watts, energy efficient
                  lamps
                  F4OUT12WMII, lay in, return air troffer, 3" 16 cell paralouver
                  lens. (Match existing fixtures.)
            2.    Interior space - Day-Brite, 2'x 4' fluorescent, 4 tube,
                  Catalog #PGC424-ESB, 277 Volts 100 Watts, energy efficient
                  lamps F4OTI2WMII, lay in, return air troffer, 3" 32 cell
                  parlouver lens. (Match existing fixtures.)
            3.    Emergency lighting: Emergency generator system.
      B.    Accent Lighting
            1.    Down Light - Recessed down light with aluminum reflector with
                  black baffle, PL-13 double twin lamp, 277V, 6.5 aperture as
                  manufactured by - Halo H275-409P, Marco FM13-63-277 or
                  Prescolite CFX TO-76S-277.
            2.    Recessed down - Recessed 75W PAR38/3, gimbal ring adjustable,
                  as manufactured by Prescolite PBX-TA-72, or equal Halo, Marco.
      C.    Switch Assembly
            1.    Pass & Seymour 20AC series or equal, with smooth plastic
                  cover.
            2.    Color- Ivory.
      D.    Motion Detector
            1.    Hubbel - H-MOSS 1000 Wall Switch, WSS-1277, with off override
                  and 12 minute delay. (Model 257-151 SA for ceiling
                  applications.)
            2.    Use in lieu of standard switch assembly.
      E.    Exit Lights
            1.    Emergency generator system.
      F.    Installation - Contractor shall install electrical system as
            required per state and local codes.
      G.    Smoke Detection, Alarm & Communication Systems
            1.    Modify existing building systems per as per requirements of
                  the U.B.C. Section 1807 and ANS1A117.1-1996.
      H.    OPTIONS:
            1.    Track Lighting
                  a.    Two circuit track by Halo or Lightolier.
                  b.    Heads - Halo or Lightolier style as selected by tenant.

XII.  POWER -

      A.    Outlets
            1.    Duplex receptacle - Series 5342 (20 Amp) by Pass & Seymour or
                  equal with smooth plastic cover plate.
            2.    Color - Ivory.
      B.    OPTIONS:
            1.    Isolated Circuits. - Pass & Seymour 2091 (20 Amp) or equal,
                  orange, with ivory smooth plastic cover plate.
            2.    Floor Outlets - Model RC-700A as manufactured by Raceway
                  Components Inc., 208 19th avenue, Paterson, NJ 07524.

                                       33
<PAGE>

XIV.  TELEPHONE

      A.    Telephone Outlets - Empty single gang box with 3/4" conduit stubbed
            into ceiling space with blank ivory cover plate.
      B.    Service -
            1.    3/4" conduit from outlet to centrally located pull box or
                  telephone board.
      C.    OPTIONS:
            1.    Telephone equipment board - 3/4" plywood edges filled and
                  finished. Painted to match wall.
            2.    Communication cables must be plenum rated or be in conduit.
            3.    Standard modular telephone outlets as needed.

                                       34
<PAGE>

                                  EXHIBIT "F"

                             RULES AND REGULATIONS

1. The sidewalks, entrances, passages, courts, elevators, stairways, corridors
or halls shall not be obstructed or used for any purpose other than ingress or
egress.

2. No awnings or other projections shall be attached to the outside walls of the
Building.

3. The sashes, sash doors, skylights, windows and doors that reflect or admit
light and air into the halls, passageways or other public places in the Building
shall not be covered or obstructed, nor shall any bottles, parcels or other
articles be placed on the windowsills. If Tenant desires window curtains, the
same must be of such uniform shape, color, material and make as may be
prescribed by Landlord. Neither the interior nor the exterior of any windows
shall be coated or otherwise sunscreened without Landlord's prior written
consent.

4. No sign, advertisement or notice shall be exhibited, painted or affixed by
Tenant on any part of, or so as to be seen from the outside of, its Premises or
the Building without Landlord's prior written consent. In the event of Tenant's
violation of the foregoing, Landlord may remove the same without any liability
and may charge the expense incurred in such removal to Tenant. All signs,
whether on doors, directory tablets or elsewhere, shall be inscribed, painted or
affixed for Tenant by Landlord at the expense of Tenant, and shall be of a size,
color and style acceptable to Landlord. Landlord may prescribe a design standard
for all such signs.

5. The bulletin board or directory of the Building will be provided exclusively
for the display of the name and location of Tenant only; and Landlord reserves
the right to exclude any other names therefrom, and each and every name in
addition to the name of Tenant placed upon such bulletin board or directory,
shall be subject to Landlord's prior written consent (and if approved by
Landlord, all costs therefor shall be paid by Tenant). Any such listings or
representations, once installed, shall be subject to relocation or removal upon
Landlord's written request for any reason (except that any such relocations or
removals at Landlord's request, unless such request is based upon Tenant's
breach of the Lease, of which these Rules and Regulations are a part, shall be
paid for by Landlord), and Tenant shall pay for the removal of any such listings
or representations upon its departure from its Premises.

6. All doors opening into public corridors shall be kept closed, except when
being used for ingress and egress.

7. Tenant shall not mark, paint, drill or bore into, cut or string wires in, lay
linoleum or other floor coverings in, or in any way deface any part of its
Premises or the Building, except with Landlord's prior written consent and as
Landlord may direct.

8. All keys shall be obtained from Landlord and neither Tenant, its agents or
employees shall have any duplicate keys made. No additional locks or bolts of
any kind shall be placed upon any of the doors or windows by Tenant, nor shall
any changes be made in existing locks or the mechanisms thereof. Tenant must,
upon the termination of its tenancy, give to Landlord all keys pertaining to the
Premises and the Building, and in the event of the loss of any keys so
furnished, Tenant shall pay Landlord the cost of replacing same or of changing
the lock or locks opened by such lost key(s) if Landlord shall deem it necessary
to make such change.

9. No window or other air conditioning or heating units or other similar
apparatus shall be installed or used by Tenant without Landlord's prior written
consent. Tenant shall not be permitted upon the roof at any time.

10. The water and wash closets and other plumbing fixtures shall not be used for
any purpose other than those for which they were constructed and no sweepings,
rubbish, rags or other substances shall be thrown therein. All damages resulting
from any misuse of the fixtures by Tenant or its servants, employees, agents,
visitors or licensees shall be bone by Tenant.

                                       35
<PAGE>

11. All removals from, or the carrying in or out of, the Building of any safes,
freight, furniture, heavy or bulky matter of any description, must take place
only between the hours of 9:00 and 11:00 A.M., and 2:00 and 4:00 P.M. of days
other than Saturdays, Sundays and holidays (no moving being permitted on
Saturdays, Sundays or holidays without special permission) and must be made upon
previous written notice to Landlord and under its supervision, and the persons
employed by Tenant for such work must be acceptable to Landlord. Landlord
reserves the right to inspect all safes or other heavy or bulky equipment or
articles to be brought into the Building and to exclude from the Building all
such heavy or bulky equipment or articles, the weight of which may exceed the
floor load for which the Building is designed, or such equipment or articles as
may violate any of the provisions of the Lease of which these Rules and
Regulations are a part. Tenant shall not use any machinery or other bulky
articles in the Premises, even though its installation may have been permitted,
which may cause any noise, or jar, or tremor to the floors or walks, or which by
its weight might injure the floor of the Building.

12. Neither Tenant nor its servants, employees, agents, visitors or licensees
shall at any time bring or keep upon the Premises any flammable, combustible or
explosive fluid, chemical or substance.

13. The Premises shall not be used for manufacturing or for the storage of
merchandise except as such storage may be incidental to the permitted use of the
Premises. Tenant shall not, without Landlord's prior written consent, occupy or
permit any portion of the Premises to be occupied or used for the manufacture or
sale of liquor or tobacco in any form, or as a barber or manicure shop, or as an
employment bureau. The Premises shall not be used for lodging or sleeping. No
sales or auctions shall be conducted from the Premises.

14. Tenant shall not make, or permit to be made, any unseemly or disturbing
noises, or disturb or interfere with occupants of the Building or neighboring
buildings or premises or these having business with it by the use of any musical
instrument, radio, phonographs or unusual noise, or in any other way. Neither
Tenant nor its servants, employees, agents, visitors or licensees shall throw
anything out of doors, windows or skylights or down the passageways.

15. No bicycles, vehicles, birds or animals of any kind shall be brought into or
kept in or about the Premises or the Building and no cooking shall be done or
permitted by Tenant in its Premises, except that the preparation of coffee, tea,
hot chocolate and similar items and items that can be heated in a microwave oven
for Tenant, its employees and visitors shall be permitted provided such
activities do not otherwise violate the Lease of which these Rules and
Regulations are part and provided power shall not exceed that amount which can
be provided by a 30 amp circuit. Tenant shall not cause or permit any unusual or
objectionable odors to be produced in or emanate from the Premises.

16. There shall not be used in any space, or in the public halls of the
Building, any hand truck except those equipped with rubber tires and side
guards.

17. No vending or coin operated machines shall be placed within the Premises
without Landlord's prior written consent.

18. No person shall be employed by Tenant to do janitorial work in any part of
said Building without Landlord's prior written consent. Any person employed by
Tenant to do janitorial, maintenance or similar work with Landlord's consent
shall, while in the Building, be subject to and under the control and direction
of Landlord or its agent or representative (but not as an agent or servant of
Landlord) and Tenant shall be responsible for all acts of such persons.

19. Landlord shall have the right to prohibit any advertising by Tenant which,
in Landlord's opinion, tends to impair the reputation of the Building or its
desirability as an office building, and upon written notice from Landlord,
Tenant shall refrain from or discontinue such advertising.

20. Canvassing, soliciting and peddling in the Building are prohibited and
Tenant shall cooperate to prevent same.

21. Landlord reserves the right to control access to the Building by all persons
after reasonable hours of generally recognized business days and at all hours on
Sundays and legal holidays. Tenant shall be responsible for all persons for whom
it requests after-hours access and shall be liable to Landlord for all acts of
such persons.

                                       36
<PAGE>

Landlord assumes no responsibility and shall not be liable for any damage
resulting from the admission of any unauthorized person to the Building. Upon
request Tenant shall provide Landlord with a description and license plate
number of all its personnel's vehicles utilizing parking at the Building.

22. Landlord reserves the right to exclude or expel from the Building any person
who, in the judgment of Landlord, is intoxicated or under the influence of
liquor or drugs, or who shall in any manner do any act in violation of the Rules
and Regulations of the Building.

23. It is understood and agreed between Landlord and Tenant that no assent or
consent to any waiver or any part hereof by Landlord in spirit or letter shall
be deemed or taken as made except if same is done in writing and attached to or
endorsed hereon by Landlord.

24. Landlord reserves the right at any time to change or rescind any one or more
of these Rules or Regulations, or to make such other and further reasonable
Rules and Regulations as in Landlord's judgment may from time to time be
necessary for the management, safety, care and cleanliness of the Premises,
Building and Common Areas, and for the preservation of good order therein, as
well as for the convenience of other occupants and tenants therein. Landlord
shall not be responsible to Tenant herein or to any other person for the
nonobservance of the Rules and Regulations by any other tenant or other person.
Tenant shall be deemed to have read these Rules and Regulations and to have
agreed to abide by them as a condition to its occupancy of the Premises.

                                       37
<PAGE>

                                  EXHIBIT "F"

                         TENANT'S ESTOPPEL CERTIFICATE

The undersigned, as Tenant, under that certain Office Lease (the "Lease") dated
as of ________, 19__ made with Parkside Salt Lake Corporation, a Delaware
corporation, as Landlord, hereby certifies as follows (all initially capitalized
terms or phrases used herein shall have the same meanings as in the Lease):

            1. The undersigned entered into occupancy of the Premises described
in the Lease on ______________________, 19__;

            2. The undersigned opened for business in the Premises on _______,
19__;

            3. The Lease (including all Exhibits) is in full force and effect
and has not been assigned, modified, supplemented or amended in any way, except
as follows: _______________________________________

            4. The Lease, as affected by those changes set forth in Paragraph 3
above, represents the entire agreement between the parties as to the Premises;

            5. The Commencement Date under the Lease was _________________;

            6.The term of the Lease will expire on _______________________;

            7. All conditions of the Lease to be performed by Landlord and
necessary to the enforceability of the Lease have been satisfied;

            8. There are no uncured defaults by Landlord or Tenant under the
Lease and Tenant knows of no events or conditions which with the passage of time
or notice or both, would constitute a default by Landlord or Tenant under the
Lease, except as follows:

            9. No rents have been prepaid, other than for the current month and
as expressly provided in the Lease;

            10. As of the date hereof, the undersigned has no existing defenses
against or offsets of Basic Annual Rent or Additional Rent or the enforcement of
the Lease by Landlord;

            11. The total amount of security deposit delivered to Landlord is
$_______ , and none of that amount has, to Tenant's knowledge, been applied by
Landlord to cure any default by Tenant; and

            12. The current monthly installment of Basic Annual Rent is
_____________, and has been paid through _____________, 19__.

            EXECUTED this ______ day of _________, 19__.

            "TENANT"

            By:____________________________________

            Its:___________________________________

                                       38
<PAGE>

                                  EXHIBIT "G"

                               PARKING PROVISIONS

            1. Capitalized terms used but not defined in this Exhibit shall have
the meanings ascribed to them in the Office Lease (the "Lease") to which this
Exhibit is attached.

            2. Subject to the terms and conditions of this Exhibit, Landlord
shall issue Tenant parking passes (individually, a "Pass" and collectively, the
"Passes") for the parking facilities owned by Landlord in connection with the
Building (the "Facilities") in such numbers as Tenant may request, up to the
maximum number of thirteen (13) Passes for unreserved parking outstanding to
Tenant at any given time. Unreserved parking shall be designated as parking in
the parking garage rather or the surface parking lot both of which constitute
part of the Facility. Each Pass shall, during the time it is in effect, entitle
Tenant to park one vehicle in the type of parking stall designated in the Pass;
provided Passes for unreserved parking shall be subject to the availability of
parking spaces. Tenant acknowledges that in order for Landlord to fully utilize
the Facilities, and to facilitate the providing of parking to clients and
visitors of tenants of the Building, Landlord will make estimates and
predictions as to the numbers of Passes for unreserved parking that will be used
on each day and at any given time, and permit others to use the Facilities based
upon such estimates and predictions. On occasion, and from time to time,
unanticipated usage of the Facilities may result in parking spaces being
unavailable for the holders of Passes for unreserved parking. If, however, on a
frequent and recurring basis, there are no unreserved parking spaces available
to the holders of Tenant's Passes for unreserved parking, Landlord will, at
Tenant's written request, make reasonable adjustments to Landlord's parking
policies and practices in order to limit the occurrence of such problems to an
occasional basis.

            3. Prior to the first day of each month, Tenant shall pay Landlord
the monthly parking fee of $55.00 per Pass for unreserved Passes, subject to
periodic market adjustments, for each Pass that will be outstanding to Tenant
during such month. If such fee is not paid when due with respect to any Pass,
such Pass shall immediately become null and void and Tenant shall promptly
return such Pass to Landlord. Landlord may, in its discretion, increase such
fees at any time and from time to time so long as the fees charged for the
Passes are reasonably competitive with rates being charged at the time for
similar parking in the general area of the Building.

            4. Tenant's rights under this Exhibit shall terminate and Tenant
shall promptly return to Landlord all outstanding Passes issued to it upon the
occurrence of either of the following: (i) the last day of the Lease Term; or
(ii) any default or breach on the part of Tenant under the Lease or this
Exhibit.

            5. The parking rights granted to Tenant under this Exhibit or under
the Passes shall be deemed a license only and nothing in this Exhibit or the
Passes shall be construed as granting to or vesting in Tenant any fee, leasehold
or other interest in the Facilities other than a license which is subject to
termination as provided in this Exhibit.

            6. Landlord's inability to make parking available at any time to
holders of the Passes shall not be deemed to be a breach or default on the part
of Landlord under the Lease or under this Exhibit so long as such inability is
due to fire, flood, earthquake, strikes, riots, blackouts, condemnation and
other casualties or causes reasonably beyond Landlord's control. The abatement
of Tenant's obligation to pay parking fees for the Passes during any such period
for which parking is unavailable shall constitute Tenant's sole remedy in the
event of such unavailability.

            7. Tenant may permit its personnel to use Passes issued to Tenant
pursuant to this Exhibit, provided Tenant shall maintain on file with Landlord
at all times a current list of each of Tenant's personnel permitted to use a
Pass. Only one of Tenant's personnel at any given time shall be assigned to a
given Pass and only that person may use such Pass. Tenant shall be fully
responsible to Landlord to assure that each of Tenant's personnel whom Tenant
permits to use a Pass fully complies with the terms and conditions of this
Exhibit and shall be liable to Landlord for any failure of any of Tenant's
personnel to so comply. Landlord may deal directly with those persons designated
by Tenant as authorized to use the Passes with regard to such matters as the
renewal of

                                       39
<PAGE>

Passes and the collection of monthly parking fees, and no such direct dealings
shall relieve Tenant of any of its duties or obligation hereunder.

            8. Except as provided in Section 7 above, Tenant shall not assign
any of its rights under this Exhibit other than in connection with a permitted
sublease or assignment under the Lease. Any assignment by Tenant contrary to the
terms of this Exhibit shall be of no force or effect.

            9. In connection with the use of the Facilities, Tenant shall
observe and comply with, and shall cause each person who uses any Pass issued to
Tenant under this Exhibit to observe and comply with, all rules and regulations
promulgated by Landlord, as in effect from time to time with respect to the use
of the Facilities, including, without limitation, rules and regulations
regarding spaces or areas in which parking is restricted, limited or prohibited.
If Tenant or any person using any of Tenant's Passes fails to observe such rules
and regulations, Landlord, at its sole option, may, in addition to any other
remedy it may have, cancel Tenant's rights under this Exhibit and require Tenant
to relinquish all Passes issued to it.

            10. By using the Facilities, Tenant and all persons using Passes
issued to it accept and assume all risk of injury caused by any other users of
the Facilities and of damage, loss or theft of any vehicle or other property
while in the Facilities.

            11. Landlord, at its sole option, shall have the right to move the
locations of reserved parking stalls and to assign designated parking stalls
with respect to Passes for unreserved parking at any time during the term of
this Exhibit.

            12. Tenant's use of the Facilities as herein set forth shall be in
common with other tenants of the Building and any other parties permitted by
Landlord to use the Facilities.

            13. Any breach or default by Tenant under this Exhibit shall
constitute a default on the part of Tenant under the Lease and any breach or
default by Tenant under the Lease shall constitute a default on the part of
Tenant under this Exhibit. If Landlord elects to terminate the License pursuant
to Section 3 of this Exhibit because of a breach or default by Tenant under this
Exhibit, Landlord may, at its discretion, exercise any or all remedies allowed
under the Lease or applicable law.

            14. Nothing in this Exhibit shall be deemed to alter, modify,
release, nullify or reduce, in any manner whatsoever, Tenant's obligations under
the Lease. Tenant shall comply with the Building Rules and Regulations attached
to the Lease in connection with the exercise of its rights under this Exhibit.
Except where the provisions of this Exhibit directly contradict the Lease, the
provisions of the Lease shall apply to this Exhibit and any provision of the
Lease which provides greater protection to Landlord than is provided under this
Exhibit may, at Landlord's discretion, be applied to any dispute or issue
regarding this Exhibit.

LANDLORD:                                 TENANT:

PARKSIDE SALT LAKE CORPORATION            ADVANCED TELECOMMUNICATIONS, INC.

                                                                     PLEASE SIGN
                                                                       & DATE

By: /s/ [ILLEGIBLE]              RM       By: /s/ Satish C. Tiwari
    -------------------------------           ----------------------------------

Its: Asset Manager                        Its:       SATISH C. TIWARI
     ------------------------------                 V.P. ENGINEERING AND
                                                   NETWORK IMPLEMENTATION
                                             ADVANCED TELECOMMUNICATIONS, INC.
                                                 730 2ND AVE S. SUITE 1200
                                                   MINNEAPOLIS, MN 55402

Date: 1-11-2000                           Date: 12/30/1999
      -----------------------------             --------------------------------

                                       40<PAGE>
                     STANDARD OFFICE LEASE AGREEMENT (GROSS)

THIS LEASE AGREEMENT (hereinafter called the "Lease Agreement") made as of the
3rd day of March, 1999, by and between TIMESHARE SYSTEMS INC., a Minnesota
corporation,  having offices at 511 Eleventh Avenue South,  Minneapolis,
Minnesota,  55415  (hereinafter called the "Landlord"), and Advanced
Telecommunications Inc., a Minnesota corporation (hereinafter called the
"Tenant").

                                    WITNESSTH

     FOR AND IN CONSIDERATION of the sum of One Dollar ($l.00) in hand paid by
each of the parties to each other, and other good and valuable consideration,
receipt and sufficiency of which is hereby acknowledged, Landlord does hereby
lease and let unto Tenant, and Tenant does hereby lease and let unto Tenant, and
Tenant does hereby hire, lease and take from Landlord, that area outlined in red
on Exhibit A-1 attached hereto, and by this reference incorporated herein, and
described as Suite 333, 340, 343, 348 and 367, collectively containing
approximately 5,071.5 rentable square feet of area (collectively referred to as
the "Five Suites"), Suite 334, containing approximately 1,046.5 rentable square
feet of area ("Suite 334"); the approximate East Half of Suite 325 (as shown on
Exhibit A-1) containing approximately 5,487.8 rentable square feet of area
("Suite 325E"), and the approximate West Half of 325 containing approximately
5,736.2 rentable square feet of area ("Suite 325W"), collectively the Five
Suites, Suite 334, Suite 325E; and Suite 325W shall constitute the "Premises"
provided such Suites shall not be deemed part of the Premises until the time
permits as set forth in Article 5 below. The Premises are all located within the
building at 511 11th Avenue South, (hereafter called the "Building") in the city
of Minneapolis, County of Hennepin, State of Minnesota. The term Building as it
is used herein shall consist of the land and the building(s) set forth in
Exhibit A-2 hereto. The Premises shall be measured from the outside of the
exterior or corridor walls and from the center of demising walls to obtain the
useable area of the Premises, which shall be multiplied by a factor of 1.15 to
arrive at the rentable area of the Premises. The parties may measure the
premises at any time, but unless the rentable area differs by more or less than
10% the rental amounts set forth below shall not be adjusted.

ARTICLE 1 - TERM AND PRIOR LEASE

     A. To have and to hold said Premises for a term of ten (10) years,
commencing upon the earlier of: i) June 1, 1999; or ii) the date on which Tenant
occupies any portion of the Premises for the conduct of its business; and
terminating on May 31, 2009 (hereinafter called the "Term") upon the rentals
and  subject to the  conditions  set forth in this Lease Agreement, and the
Exhibits attached hereto.  The  commencement and termination dates are
specifically subject to the provisions of Article 5 hereof.

     B. Tenant shall have the right to renew the Term of the Lease Agreement for
two (2) periods of five (5) years each ("Renewal Terms"), subject to the
following terms, covenants or conditions: i) Tenant shall not be in default
beyond any applicable grace period in the performance of any of the terms,
covenants or conditions of this Lease Agreement, either at the time of the
exercise of the right to renew or at the commencement of the applicable Renewal
Term; ii) the Renewal Term(s) shall be on the same terms, covenants and
conditions as provided in this Lease Agreement, except the Minimum Rental during
the Renewal Term shall be at the rates as at forth in the table in Paragraph 3B
and there shall be no further renewal right after the commencement of the second
Renewal Term; and iii) Tenant shall exercise its right to renew by giving
written notice thereof to Landlord at least nine (9) calendar months prior to
the expiration of the initial Term or first Renewal Term, as the case may be,
time being of the essence. If Tenant fails to notify Landlord in the manner and
within the time as provided in this paragraph, Tenant's right to renew this
Lease Agreement shall expire and become null and void. If Tenant fails to
exercise the first Renewal Term, then the following Renewal Term shall also
terminate.

     C. The parties acknowledge that Tenant currently has possession of
approximately 7061 rentable square feet of space on the 4th floor of the
Building denominated Suite 409 ("Suite 409"), pursuant to a lease dated March
3,1999 (the "Prior Lease"). The Parties agree that upon the commencement of the
Term of this Lease Agreement, the Prior Lease shall terminate and be of no
further force or effect without further act or deed of the parties, however,
notwithstanding the foregoing, all rentals due under the Prior Lease shall be
paid through June, 1999 and no rentals under this Lease Agreement shall commence
until July, 1999; and provided further any other obligations under the Prior
Lease which accrue prior to the commencement of the Term of this Lease sha11
continue until satisfied. As at the commencement of the term of this Lease
Agreement, Tenant shall surrender possession of Suite 409 in the condition
required by Article 19, "Surrender" of the Prior Lease. As of the commencement
of the Term of this Lease Agreement, Tenant shall and hereby does transfer,
convey, quitclaim and assign to Landlord all of its rights and interests in and
to Suite 409 and all improvements located therein; provided the foregoing does
not in any way relieve Tenant from its obligations under said Article 19, with
respect to Suite 409.

ARTICLE 2 - USE

     A. The Premises shall be used by the Tenant solely for the following
purposes: General office purposes, including executive corporate and general
offices; In addition Tenant shall be entitled, subject to obtaining such
approvals as may be required from any governmental authorities which may have
jurisdiction thereof, to install, operate and maintain telecommunications
equipment, including telecommunication switching operations and related
facilities utilized in connection with Tenant's telecommunications business.
No other use of the Premises shall be allowed.

     B. Landlord acknowledges that in connection with Tenant's use of the
Premises, it shall be installing specialized telecommunication equipment, and
various electrical equipment and facilities associated therewith
("Telecommunications Equipment"). Tenant shall be solely responsible for
ensuring that the Telecommunications Equipment can be operated consistent with
Landlord's current facilities and utilities and Tenant shall be solely
responsible for any special utility requirements created by the
Telecommunications Equipment (such as, but not limited to: all electrical power
utilized thereby, additional cooling requirements, uninterrupted power sources,
etc.) the installation of which shall be governed by Article 4 below. Tenant
shall also be solely responsible to ensure that any electrical/magnetic field
("EMF") is not emitted beyond the Premises at levels exceeding those acceptable
by the Food and Drug Administration for persons with pacemakers or other
electronic prosthetics (5 goss or 5,1000 miligoss). In all events, Tenant shall
indemnify, defend with counsel of Landlord's selection, and save Landlord
harmless from any claims for injury to a person or damage to property asserted
by any person against Landlord, its agents or employees by reason of any EMF
emitted from or created by the Telecommunications Equipment. In addition, Tenant
hereby assumes all risk in connection with the presence of all EMF within the
Premises and hereby releases Landlord from any and all liability or
responsibility to Tenant, its agents, employees, constructors or anyone claiming
through or under Tenant by way of subrogation or otherwise for the loss or
damage to property or injury to persons arising out of or relating to EMF.

     C. Tenant and its "Affiliates" (as defined in Article 15 below) shall have
the right to provide telecommunication services to other tenants in the Building
on a non-exclusive basis with other providers of such services; provided all
such tenants shall be able to freely choose their telecommunications provider,
and Tenant shall not solicit such tenants (in person) except with Landlord's
prior approval.

ARTICLE 3 - RENTALS

     A. Tenant agrees to pay to Landlord as minimum rental (hereinafter called
"Minimum Rental") for the Premises, without notice set-off or demand, during the
Term, and if properly exercised, each of the two Renewal Terms, at the rate as
set forth in the table in Paragraph 3B below. During any given period during the
Term the appropriate Rental Rate, as set forth below, shall be multiplied by the
number of actual rentable square feet of area as existing within the Premises,
and the resultant product shall be divided by 12 to arrive at the monthly
Minimum Rent installed to be payable during the corresponding time period in
which the Premises contains said same number of rentable square feet of area.
Said monthly installments to be due and payable by Tenant in advance on the
first day of each calendar month during the Term of this Lease Agreement, or any
extension or renewal thereof, at the office of Landlord set forth in the
preamble to this Lease Agreement or at such other place as Landlord may
designate. In the event of any fractional calendar month, Tenant shall pay for
each day in such partial month a rental equal to 1/30 of the Minimum Rental.
Tenant agrees to pay, as Additional Rent, which shall be collectible to the same
extent as Minimum Rental, all amount which may become due to Landlord hereunder
and any tax, charge or fee that my be levied, assessed or imposed upon or
measured by the rents reserved hereunder by any government authority
acting under any present or future law before any fine, penalty, interest or
costs may be added thereto for non-payment.

     B. The scheduled Minimum Rentals to be paid by Tenant are as follows:

                                      -1-
<PAGE>

     B. The scheduled Minimum Rentals to be paid by Tenant are as follows:

Time Period                           Per Annum Minimum     Monthly Minimum Rate
                                         Rental Rate
                                      per Rentable Square
                                     Foot of Area Contained
                                      within the Premises

Commencement Date until second                $17.50             $10,297.30
anniversary thereof

second anniversary of Term until the          $18 50             $10,885.70
fourth anniversary

fourth anniversary of Term until the sixth    $19.50             $11,474.10
anniversary

sixth anniversary of Term until the           $20.50             $12,062.50
eighth anniversary

eighth anniversary of Term until the          $21.5O             $l2.650.95
tenth anniversary

First Renewal Term, if applicable, until      $22.50             $13,239.35
the twelfth anniversary

twelfth anniversary of Term until the         $23.5O             $13,827.75
fourteenth anniversary

fourteenth anniversary of Term until the      $24.50             $14,416.20
fifteenth anniversary

Second Renewal Term, if applicable, until     $25.50             $15,004.60
the sixteenth anniversary

sixteenth anniversary of Term until the       $26.50             $15,593.00
eighteenth anniversary

eighteenth anniversary of Term until the      $27.50             $16,181.45
end of the Second Renewal Term

ARTICLE 4 - CONSTRUCTION

     A. Tenant has provided or shall provide Landlord with plans and/or a
description for permanent improvements to modify the Premises to accomodate
Tenant's intended use (hereafter called the "Preliminary Plans"), which
Preliminary Plans are subject to Landlords approval, which approval shall not
be unreasonably withheld or delayed. Subject to the further written approval of
Landlord, which approval also shall not be unreasonably withheld or delayed,
Tenant shall make such modifications to the Preliminary Plans as it shall
require (hereinafter called "Final Plans"). The Final Plans shall be deemed
approved by Landlord if Landlord fails to make objections thereto within the
later of five (5) days of receipt of such Final Plans from Tenant or the date of
execution of this Lease Agreement. Tenant agrees to make its architect and
engineers available to Landlord for purposes of responding to questions of
Landlord regarding the Preliminary and Final Plans and their impact upon the
Building. Upon receipt of the Final Plans, Tenant shall obtain bids from the
various contractors and subcontractors needed to perform the work contemplated
by the Final Plans ("Work"). The general contractor, construction manager and
major subcontractors contemplated by Tenant shall be first approved by
Landlord, which approval shall not be unreasonably withheld or delayed. Tenant
shall furnish to the Landlord a written statement certified by Tenant and the
general contractor who shall perform the Work listing all subcontractors and
suppliers regarding the Work. Upon submission of such certification, Tenant
shall have the right and license to enter the Premises to do the Work, subject
to all the provisions of this Lease Agreement, except that the Term and the
commencement of rentals shall not commence except pursuant to Paragraph 1A
above. Tenant shall be responsible for constructing the improvements as shown
on the Final Plans (hereafter called "Tenant Improvements") at Tenant's sole
cost and expense. Article 27 below, and Tenant's obligations thereunder shall
specifically be applicable to the Tenant Improvements and all Work performed
or to be performed by Tenant. Tenant acknowledges that the Work shall begin
with Premises in the current "as is" condition with the exception of the
following ("Landlord's Work"): the Premises shall be in broom-clean condition.
After completion of the Tenant Improvements, Tenant shall supply to Landlord
lien waivers from all suppliers, subcontractors and other entities listed on the
sworn construction statement, together with a blanket lien waiver from Tenant's
contractor for the full amount of the Work. Within ninety (90) days subsequent
to the commencement of the Term, Tenant, shall submit in writing to Landlord
a list ("Tenant's Equipment") of any equipment and/or fixtures it deems to be
"trade fixtures" and which Tenant shall be removing at the end of the Term (or
last Renewal Term, if applicable). In no event shall any Tenant Improvement
which alters any existing Building system or any Building equipment
servicing more than just the Premises be included as Tenant's Equipment. If no
list is so submitted to Landlord then none of the equipment and improvements
installed by Tenant shall be deemed trade equipment nor removable by Tenant at
the end of the Term, unless it is covered by a separate license agreement
between Landlord and Tenant. If Tenant desires to add equipment not shown on the
Final Plans (whether during the performance of Tenant's Work or subsequently
during the Term or any Renewal Term) then it shall supplement Tenant's Equipment
List prior to the installation of such equipment. Landlord, in connection with
its approval of the Final Plans, shall provide Tenant with a list of those
improvements which Landlord will require Tenant to remove at the end of the Term
(or last Renewal Term, if applicable) pursuant to Article 19 below. Any Tenant
Improvements not on such list, or if Landlord fails to supply such list to
Tenant prior to the completion of the Tenant Improvements, then Landlord shall
be deemed to have waived its sights under Article 19 to required Tenant to so
remove such Tenant Improvements.

     B. The parties acknowledge that the Tenant's Work shall include the
following matters (whether or not included within the Final Plans):

     1. the following electrical systems requirements:

          (i) reconfiguring the power distribution system in connection with the
power to be distributed to the "Electrical Room" (as defined below) including
installation of electrical grounding facilities connected to the Building's
water main, provided the same does not violate any city ordinance and any
necessary consents from the City of Minneapolis are obtained by Tenant, at its
sole cost and expense;

          (ii) providing of A/C electric capacity delivered to a pull box within
the Premises at a capacity for Tenant's needs (such electrical capacity may
exist, but Tenant is responsible for verifying same, as well as confirming that
such is sufficient for its needs, including the "Tenant Generator", as defined
below). If Tenant determines that its electrical requirements exceed the
existing service to the Premises, Tenant shall be entitled to, at its sole cost
and expense, increase such capacity, provided it obtains the necessary
governmental approvals and no additional costs for service fees are incurred by
Landlord. Landlord agrees to cooperate with any applications Tenant may be
required to make to any appropriate governmental agencies and/or public
utility providers in connection therewith, provided the same shall be without
cost to Landlord;

                                      -2-

<PAGE>

     (iv) Tenant shall install for the Premises (including the Electric Room)
electric submeter for all electrical usage therein;

     2. installation of the following:

     (i) Tenant shall cause to be removed modular interior walls, from within
the Premises, if there are any, and store the same inside the Premises (or at
such other storage location as designated by Landlord) until the completion of
Tenant's Work, at which time said removed modular interior walls (together with
any additional modular interior walls Landlord may have in storage) shall be
made available by Landlord to Tenant for installation of offices and rooms
(including the Electrical Room) utilizing Landlord's modular walls, to the
extent Tenant so desires;

     (ii) installation of floor covering and wall coverings pursuant to Final
Plan;

    (iii) extension of the demising walls above the ceiling to the deck of the
roof, pursuant to Final Plan.

     (iv) installation of cabling and conduit from the Premises to Tenant's
telecommunication antennae and related equipment on the roof of the Building
(which placement, location and maintenance of such equipment shall be governed
by a separate license agreement in the form of Exhibit B attached hereto and
incorporated herein by reference). Tenant agrees that at no time during the Term
shall it use, license or otherwise agree to utilize any space upon the Building
or land upon which it is located for antennae space, except pursuant to Exhibit
B, and in no event shall it use, license, utilize or rent space from other
tenants or licencees of the Building without the consent of Landlord, which
consent may be conditioned upon payment of reasonable fees to Landlord;

     (v) use of the Building's existing conduit and riser space and in the event
existing conduit is not available, the installation of conduit and cabling from
the Electric Room to Tenant's network outside of the Building. In connection
therewith Landlord shall cooperate with Tenant to locate and utilize an
appropriate riser space from the Premises to other necessary levels of the
Building, such cooperation may include core drilling (subject to Paragraph 4C
below). Tenant shall also have the right to construct dual telecommunication
conduit entrances to the Building (as reasonably approved by Landlord), which
may include the removal and replacement of curbing and/or sidewalks, and
trenching and repairing portions of the parking lot and/or other common
areas, all subject to Paragraph 4C below. Tenant agrees to cooperate and
coordinate with other tenants of the Building desiring or constructing such dual
telecommunication conduit entrances. Notwithstanding anything contained in this
Lease Agreement to the contrary, all cabling and conduit, located on the
exterior of the Premises shall become the property of Landlord upon the
expiration of the Term and shall be surrendered with the Premises.

     (vi) Tenant may remove any demising walls between or among the Five Suites
and/or Suite 334 and/or Suite 325E. At such time as possession to State 325E is
delivered to Tenant, Tenant shall construct a temporary demising wall to
separate Suite 325E from Suite 325W at the approximately location as shown by
the dotted line on Exhibit A-1. Said temporary demising wall shall be pursuant
to plans to be approval by Landlord, which approval shall not be unreasonably
withheld or denied.

     3. installation of the following heating, ventilation, air conditioning
systems, equipment or facilities ("HVAC"):

     (i) installation of such plumbing, cables, controls and accessory
equipment to connect the Electrical Room to the Building's chiller equipment
pursuant to the provisions of the license agreement set forth in Exhibit E
attached hereto and to which the parties hereby agree to be bound.

    (ii) such equipment to provide Tenant's necessary HVAC capacity to the
Premises, including but not limited to, condensers on the exterior of the
Building, or on the roof of the Building, at such location as approved by
Landlord ("Cooling Equipment"). If such Cooling Equipment is necessary, it shall
be subject to availability of space and Tenant shall pay for such space at the
same per square foot as is set forth in the table of Article 3.

   (iii) in connection with the Cooling Equipment or other forms of cooling,
such drains as Tenant deems necessary, subject to Paragraph 4C below.

    (iv) Tenant shall have the right to modify the Building's heating system
servicing the Premises, subject to Paragraph 4C below.

     (v) Tenant may modify the duct work and other modifications to the
Building's HVAC so as to service the office portions of the Premises.

     4. subject to the prior approval of Landlord, which approval shall not be
unreasonably withheld or delayed, Tenant shall he entitled to reinforce the
floor load capacity of the Premises. Tenant shall be responsible for assuring
that its equipment and any of the Work performed within the Premises does not
exceed the floor capacities of the Building and/or Premises and Tenant shall
indemnify and hold Landlord harmless from all damage, liability and costs
(including reasonable attorneys' fees) in the event it over-loads the floor
capacity of the Premises, but only to the extent it exceeds 8O ppf live weight
and 20 ppf dead weight.

     5. Tenant stall have the right to modify the Buildings sprinkler system
serving the Premises (including installation of a fire suppression system which
may be independent of the Buildings system or have the system servicing the
Premises modified to a dry pipe system), pursuant to Final Plans to be approved
by Landlord.

     6. If Tenant desires to have the right to install an emergency generator
(the "Tenant Generator") either (at Landlord's election) in an enclosed pad on
the roof of the Building or at the exterior of the Building in a location
approved by Landlord, the same shall be subject to the following:

     a. Tenant shall first obtain such governmental approval, authorizations
        and permits as are required to install and operate the Tenant Generator.

     b. All plans and specifications for the installation of the Tenant
        Generator and its connection to the Premises must be approved, in
        advance, by Landlord. The installation of the Tenant Generator shall be
        performed in a manner approved by Landlord. The Tenant Generator may
        consist of up to 350 KW diesel generator and up to a related 500 gallon
        fuel tank.

     c. Tenant shall pay the entire cost of installing the Tenant Generator,
        including any modifications to the generator area required to
        accommodate and screen the Tenant Generator.

     d. Tenant shall maintain the Tenant Generator and any related equipment, at
        its sole cost and expense, in good order and condition and will repair
        any damage to the Building and/or any other equipment caused by the
        Tenant Generator and/or its installation and/or removal. Landlord shall
        not be liable to Tenant or to any other person for any loss or damage to
        the Tenant Generator regardless of cause, other than the negligence or
        acts of Landlord, its agents or employees.

     e. Tenant shall have the right to install gas generator(s) in lieu of
        diesel. In either event: (i) any fuel tank shall be located above ground
        and within the frame of the generator, (ii) Tenant shall install such
        spill protection and other tank monitoring devices as shall be required
        by govennmental codes and regulations, (iii) Tenant shall provide
        Landlord with copies of all warranties and

                                      -3-

<PAGE>

        evidence of any testing required by law, and (iv) Tenant shall indemnify
        Landlord from and against any and all costs and liability arising from a
        leak from such fuel tank, including, without limitation, any clean-up
        costs.

     f. Upon the termination of the Lease Agreement, Tenant will have the right
        to remove the Tenant Generator, provided (i) the Tenant Generator is
        removed within five (5) days following the termination of the Lease
        Agreement, and (ii) Tenant shall repair all damage to the Building,
        landscaping and/or any other equipment caused by the removal of the
        Tenant Generator and shall restore the area to the condition as existing
        prior to such installation.

     g. The availability of appropriate exterior space, and Tenant shall pay for
        such space at the same per square foot rate as is set forth in the table
        of Article 3.

     C. All of Tenant's Work shall be performed in a good and workmanlike manner
using first grade and new materials and to the extent any of such Work involves
alteration or replacement of any existing equipment or facilities of the
Building, Tenant shall use a standard and grade equal to or better than such
existing equipment and facilities. To the extent any of Tenant's Work involves
areas outside the Premises ("Exterior Work"), Tenant and its contractors shall
coordinate all such Work with Landlord and Landlord's Building Manager, on a
daily basis. All such Work, including the Exterior Work, shall be performed in a
manner so as to not unreasonably disturb or interfere with the operations of the
Building or other tenants of the Building; specifically, but not exclusively
including, the performance of all such Work which may involve loud and/or
instating noises, vibrations, dust and/or odors after normal business hours (as
defined in Paragraph 7D below). In all events, whenever the Tenant's Work
involves the alteration and/or interference with any of the Building's systems,
including, but not limited to, electrical, water, HVAC, sprinkler, plumbing and
life/health/safety systems, Tenant shall indemnify and hold Landlord harmless
with respect to any interruption of such systems to other portions of the
Building and/or other tenants and the continued operational integrity of such
systems as a result of the Work. In all events, Tenant, at is sole cost and
expense, shall obtain all applicable governmental approvals with respect to the
installation or doing of all Work including the Exterior Work. Tenant shall
cause its contractors and subcontractors to utilize only those parking areas
designated by Landlord, and to the extent such use utilizes parking spaces,
Tenant shall utilize its parking licenses (as set forth in Paragraph 14D and
Exhibit C below) for such purposes and Tenant shall be responsible for the
license fees due thereunder during such parking use by Tenant's contractors and
subcontractors. Landlord agrees to cooperate, at no cost to it, with respect to
the obtaining of any such governmental approvals, such cooperation, however,
shall not extend to providing any concessions to the governmental authority with
respect to zoning, parking or other restrictions relating to the Building.

     D. Landlord agrees to make such alterations to the common area restroom
facilities on the first floor as necessary so as to put them in compliance with
Title III of the Americans with Disabilities Act of 1990 ("ADA"). Tenant shall
perform its Work so as to be in compliance with the ADA.

ARTICLE 5 - POSSESSION

     Except as otherwise provided, Landlord shall deliver possession to Tenant
of the Five Suites on June 1, 1999. Landlord shall deliver to Tenant possession
of Suites 334 and 325E on or about July 1, 1999 and Landlord shall deliver to
Tenant possession of Suite 325W on or about September 1, 1999. Delivery of
possession prior to the foregoing dates shall not affect the expiration date of
this Lease Agreement. Failure of Landlord to deliver possession to any given
suite by the dates above provided, due to any cause beyond Landlord's control,
shall not affect the parties' obligations or liabilities hereunder, but such
delay shall simply delay the adding of such suite to and to become part of the
Premises until Landlord is able to so deliver possession of said suite to
Tenant.

     Construction delays affecting Tenant's Work due to material shortages,
strikes, or acts of God, or otherwise shall in no event postpone the date of
commencement of the Term of this Lease Agreement nor of the payment of rentals.
By occupying any given Suite constituting the Premises as a Tenant, or to
install fixtures, facilities or equipment, or to perform the Work, Tenant shall
be conclusively deemed to have accepted the same, except for any latent defects
affecting the Building. Immediately after Tenant's completion of its Work for
the entire Premises, Landlord and Tenant shall execute a ratification agreement
which shall set forth the final Minimum Rental, the square footage of the
Premises, and delivery of the Premises in the condition required by this Lease
Agreement.

ARTICLE 6 - TENANT'S PRO RATA SHARE OF REAL ESTATE TAXES AND OPERATING EXPENSES
            ABOVE BASE

     A. Commencing with the first full calendar year subsequent to the
commencement of the Term, during each full or partial calendar year during the
Term of this Lease Agreement, Tenant shall pay to Landlord, as Additional
Rental, the amounts by which actual Real Estate Taxes and Operating Expenses
(both as hereafter defined) per square foot of rentable area in the Building
multiplied by the number of square feet of rentable area in the Premises exceed
the Real Estate Tax Base and the Operating Expense Base, respectively (both as
hereafter defined) prorated for the period that Tenant occupied the Premises. In
the event that during all or any portion of any calendar year, the Building is
not fully rented and occupied Landlord may make any appropriate adjustment in
occupancy-related Operating Expenses for such year for the purpose of avoiding
distortion of the amount of such Operating Expenses to he attributed to Tenant
by reason of variation in total occupancy of the Building, by employing sound
accounting and management principles to determine Operating Expenses that would
have been paid or incurred by Landlord had the Building been 100% rented and
occupied, and the amount so determined shall be deemed to have been Operating
Expenses for such year. As used herein, the "Real Estate Tax Base" shall be
$l.ll per rentable square foot times the rentable square feet contained within
the Premises, and the "Operating Expense Base" shall be $3.84 per rentable
square foot times the rentable square feet contained within the Premises. If the
actual Real Estate Taxes or Operating Expenses per square foot times the
rentable square feet contained within the Premises are less than the Real Estate
Tax Base or Operating Expense Base, respectively, Tenant shall not be entitled
to any refund or credit.

     B. Commencing with the first full calendar year subsequent to the
commencement of the Term, Landlord shall, each year during the Term of this
Lease Agreement, give Tenant an estimate of Operating Expenses and an estimate
of Real Estate Taxes payable per square foot of rentable area for the coming
calendar year. If either such estimate exceeds the respective Real Estate Tax
Base or Operating Expense Base (as defined above), Tenant shall pay, as
Additional Rental, along with its monthly Minimum Rental payments required
hereunder, one-twelfth (1/12) of such excess estimated Operating Expenses and/or
Real Estate Taxes and such Additional Rental shall be payable until subsequently
adjusted for the following year pursuant to this Article.

     C. As soon as possible after the expiration of each calendar year beginning
with the first full calendar year subsequent to the commencement of the Term,
but in any event no later than ninety (90) days following the close of the
calendar year, Landlord shall determine and certify to Tenant the actual
Operating Expenses and Real Estate Taxes for the previous year per square foot
of rentable area in the Building and the amounts applicable to the Premises. If
such statement shows that Tenant's share of increases in Operating Expenses and
Real Estate Taxes over the Operating Expense Base and the Real Estate Tax Base,
respectively exceeds Tenant's estimated monthly payments for the previous
calendar year, then Tenant shall, within twenty (20) days after receiving
Landlord's certification, pay such deficiency to Landlord. In the event of an
overpayment by Tenant, such overpayment (not to exceed the amount of the
estimated payments) shall be refunded to Tenant, at the time of certification,
in the form of an adjustment in the Additional Rental next coming due, or if at
the end of the Term by a refund. By written notice given to Landlord no later
than six (6) months following delivery of the written certification of Landlord,
Tenant shall have the right to audit, or have audited the written certification
and the books and records from which such certification is derived. Tenant shall
pay the costs of any such audit, unless it is determined that Tenant's
overpayment was more than five percent (5%) of the actual amount in which case
Landlord shall reimburse Tenant for the reasonable cost of the audit.

     D. For purposes of this Article, the term "Real Estate Taxes" means the
total of all taxes, fees, charges and assessments, general and special, ordinary
and extraordinary, foreseen or unforeseen, which become due and payable upon the
Building. All reasonable costs and expenses incurred by Landlord during
negotiations for or contests of the amount of Real Estate Taxes shall be
included within the term "Real Estate Taxes." For purposes of this Article, the
term "Operating Expenses" shall be deemed to mean all costs and expenses
directly related to the Building incurred by Landlord in the repair, operation,
management and maintenance of the Building including interior and exterior and
common area maintenance, management fees, cleaning expenses, energy expenses,
insurance premiums, and the amortization of capital investments made to reduce
operating costs (including reroofing costs) or that are necessary due to
governmental requirements, all in accordance with generally accepted accounting
principles. Notwithstanding the foregoing, the parties acknowledge and agree
that the janitorial services and electricity to the Premises shall be supplied
by Tenant at its costs and/or submetered and paid for by Tenant ("Tenant
Supplied Utilities") and Tenant acknowledges that it shall be given no credit
against Operating Expenses for those portions of the Premises being serviced by
Tenant Supplied Utilities. The following shall not be included in Operating
Expenses:

     (1) real estate brokerage and leasing commissions;

                                      -4-
<PAGE>

     (2) cost of alterations of any tenant's premises;

     (3) allowances or concessions provided to any tenant or occupant of the
Building;

     (4) costs incurred to make major repairs or replacements of any defective
initial construction of the Building and related appurtenances regardless of how
such costs are characterized under generally accepted accounting principles;

     (5) legal expenses incurred in connection with the preparation or
negotiation of leases, subleases, assignments or other lease-related documents
with current, prior or prospective tenants or occupants of the Building;

     (6) marketing or advertising costs to solicit new tenants;

     (7) wages, salaries, fees, and fringe benefits paid to executive personnel
or officers or partners of Landlord not having direct day to day responsibility
for operating or providing services to the Building;

     (8) the cost, above any applicable deductible, of repairs or other work
occasioned by fire, windstorm or other casualty of an insurable nature or by the
exercise of eminent domain;

     (9) costs incurred for alterations, replacements or improvements that would
be considered capital improvements under sound accounting and management
principles consistently applied, except current amortization (together with
interest of ten percent (10%) per annum on the unamortized amount) of the
capital improvement cost over the reasonable useful life of the improvement
where such capital improvement is reasonably necessary to improve the operation
or maintenance efficiency of the Building or as otherwise expressly permitted
above, provided that the amortization costs charged to direct costs for capital
improvements to improve the operation or maintenance efficiency of the Building
shall be limited to the estimated reduction in direct costs for the relevant
years resulting from such capital improvements;

     (10) expenses in connection with services or other benefits of a type which
are not provided or available to Tenant but which are provided to another tenant
of the Building or to some other third party;

     (11) costs incurred due to violation by Landlord or any tenant of the
Building of the terms or conditions of any lease;

     (12) Landlord's general overhead except as it directly relates to the
management and operation of the Building;

     (13) all items and services for which any tenant reimburses Landlord or
pays third persons;

     (14) ground lease rentals, principal or interest payments, refinancing
charges or points, or penalties resulting from late payments by the Landlord, or
depreciation;

     (15) costs incurred in connection with the cure or correction of latent
defects at the Building and cost incurred in connection with the clean-up of
Hazardous Substances from the Project or Building;

     (16) Landlord's cost of services sold separately to tenants for which
Landlord is entitled to be reimbursed by such tenants as an additional charge;

     (17) costs incurred in connection with negotiations or disputes with
tenants of the Building;

     (18) costs incurred in connection with renovating or otherwise improving or
decorating leased space for other tenants or other occupants or vacant tenant
space, other than common areas;

     (19) any particular item or service for which Tenant otherwise reimburses
Landlord by direct payment;

     (20) any expense for which Landlord is compensated through proceeds of
insurance or agreements of indemnity or surety bonds or guaranties;

     (21) any fines or penalties incurred due to actual or alleged violations by
Landlord of any governmental rule or authority,

     (22) cost of legal, accounting and other professional services incurred by
Landlord in connection with leasing activities or other activities which are not
Operating Expenses, and costs of audits of any kind performed by tenants;

     (23) any bad debt loss, rent loss, or reserves for bad debt or rent loss;

     (24) Landlord's general corporate overhead and general administrative
expenses; and

     (25) Costs arising from Landlord's charitable or political contributions.

     E. Landlord may at any time designate a fiscal year in lieu of a calendar
year and in such event, at the time of such a change, there may be a billing for
the fiscal year which is less than 12 calendar months.

     F. Landlord reserves, and Tenant hereby assigns to Landlord, the sole and
exclusive right to contest, protest, petition for review, or otherwise seek a
reduction in the Real Estate Taxes. In the event of any reductions in the Real
Estate Taxes due to Landlord's contesting the same which relate to taxes due
and payable for a year during the Term, such tax reduction, after payment of
Landlord's costs and expenses incurred in connection with effectuating such
reduction, shall be retroactively given effect, and Tenant shall be refunded its
Proportionate Share of said reduction (but not below the Real Estate Tax Base).

     G. Landlord shall keep and maintain records of all Operating Expenses, Real
Estate Taxes for a period of not less than two (2) years, which records shall be
made available to Tenant at reasonable times at Landlord's offices for
inspection and copying by Tenant or its representatives, at Tenant's cost. If
Tenant in good faith disputes the accuracy of the total amount of Operating
Expenses or Real Estate Taxes, Tenant may audit Landlord's books and records by
Tenant's representative. If such audit establishes that any of the actual
Operating Expenses or Real Estate Taxes are less than Landlord's final
determination thereof by four percent (4%) or more, then Landlord shall pay the
cost of such audit. Any over-charged or under-paid amounts shall be reimbursed
by the responsible party with thirty (30) days following delivery of such audit
to Landlord, provided Landlord does not contest the same. Any amounts payable
pursuant to this Lease Agreement shall continue to be paid during the pendency
of any audit or dispute, but upon final determination or resolution of such
dispute, any amounts payable by one party to the other hereunder shall bear
interest at the rate of eight percent (8%) per annum.

ARTICLE 7 - UTILITIES AND SERVICE

     A. Landlord agrees to provided water and sanitary sewer services to the
common area restrooms of the Building, together with janitorial supplies and
cleaning services to such restroom facilities.

                                      -5-
<PAGE>

     B. Landlord agrees to furnish heat during the usual heating season and air
conditioning during the usual air conditioning season (provided Tenant does not
remove and/or relocate the HVAC duct work serving the office areas of the
Premises), as well as electricity and janitorial services to the office areas of
the Premises (all specifically excluded from the Electrical Room), on a 24-hour
basis. Electricity to the Premises shall be by separate submeter.

     C. No temporary interruption or failure of such services incidental to the
making of repairs, alterations or improvements, or due to accidents or strike or
conditions or events not under Landlord's control, shall be deemed as an
eviction of the Tenant or relieve the Tenant from any of the Tenant's
obligations hereunder. Notwithstanding the foregoing, if for any reason
whatsoever, except due to force majeure or by any negligent act or omission or
intentional misconduct of Tenant and as a result: (i) all or any portion of the
Premises shall become untenantable (the "Untenantable Premises") for the normal
conduct of Tenant's business for a period of three (3) consecutive days, (ii)
Tenant shall vacate the Untenantable Premises and cease doing business therein
(provided, however, that the continued presence of Tenant's security personnel
therein for the purposes of preservation of Tenant's property shall not
constitute a failure by Tenant to vacate the Untenantable Premises) and (iii)
Tenant shall give notice to Landlord of the facts set forth in clauses (i) and
(ii) above, then in such event, the portion of the Rents allocable to the
Untenantable Premises shall be fully abated for the period commencing on the day
that all the conditions set forth in (i), (ii ) and (iii) above shall first be
satisfied and ending on the date that the Untenantable Premises shall be
rendered usable for the normal conduct of Tenant's business and Landlord shall
have given notice thereof (or the date Tenant shall re-occupy the Untenantable
Premises for the normal conduct of its business, if earlier).

     D. For the purposes of this Article 7, normal business hours shall be
deemed to mean the period of time between 8:00 a.m. and 6:00 p.m., Monday
through Friday, and 8:00 a.m. to 1:00 p.m. Saturdays, and specifically excluding
Sundays and legal holidays. Landlord agrees that Tenant shall have access to the
Premises 24 hours per day, 7 days per week, however, after normal business hours
such access may be subject to the use of security cards and other rules and
regulations which Landlord may adopt from time to time with respect to the
Building, provided the same are reasonable and are equally applicable to all
tenants of the Building.

     E. Tenant shall have the right to place telecommunications equipment of its
customers within the Premises ("Co-Location") and such Co-Location shall not be
deemed an assignment or sublease under the terms of this Lease Agreement
regardless whether a written agreement exists between Tenant and its customers.

     F. Tenant agrees prior to such time as it installs its own Tenant Generator
(and during such time after Tenant has so installed its own Tenant Generator)
that it elects to continue to have available to it access to the Landlord's
existing back-up emergency generator at no cost. Tenant shall pay to Landlord
its proportionate costs of all maintenance repairs and replacement of the
Building's back-up emergency generator. Such proportionate use shall be based on
electrical connected load hooked up to said generator as compared to electrical
connected load of other tenants within the Building hooked up to said generator.

     G. If the Tenant installs its own Tenant Generator, Tenant shall cooperate
with the Landlord in load shedding and/or peak moving program when requested by
the electric utility supplier (Northern States Power Company). Tenant
acknowledges that compliance with Northern States Power Company's load shedding
program has resulted in lower electrical charges to Landlord and is expected to
result in lower electrical charges to Tenant.

ARTICLE 8 - NON-LIABILITY OF LANDLORD

     Except in the event of negligence of Landlord, its agents, employees or
contractors, or as specifically provided herein, Landlord shall not be liable
for any loss or damage for failure to furnish heat, air conditioning,
electricity, elevator service, water, sprinkler system or janitorial service.
Landlord shall not be liable for personal injury, death or any damage from any
cause about the Premises or the Building except if caused by Landlord's
negligence or willful misconduct.

ARTICLE 9 - CARE OF PREMISES

     A. Tenant agrees:

        1. To keep the Premises in as good condition and repair as they were in
at the time Tenant took possession of same, reasonable wear and tear and damage
from fire and other casualty for which insurance is normally procured excepted;
        2. To keep the Premises in a clean and sanitary condition and to be
responsible for janitorial services for the switch room;
        3. Not to commit any nuisance or waste on the Premises, overload the
Premises or the electrical, water and/or plumbing facilities in the Premises or
Building, throw foreign substances in plumbing facilities, or wastefully use any
of the utilities furnished by Landlord;
        4. To abide by such rules and regulations as may from time to time be
reasonably promulgated by Landlord;
        5. To obtain Landlord's prior approval (not to be unreasonably withheld)
of the interior design of any portion of the Premises visible from the common
areas or from the outside of the Building. "Interior design" as used in the
preceding sentence shall include but not be limited to floor and wall coverings,
furniture, office design, artwork and color scheme; and
        6. Tenant shall maintain, repair and replace, if necessary any and all
equipment and/or facilities and/or trade fixtures which services, or is
dedicated, solely or exclusively to the Premises and/or Tenant, whether
initially installed by Landlord or Tenant, all at Tenant's sole cost and
expense.

     B. If Tenant shall fail to keep and preserve the Premises in the state of
condition required by the provisions of this Article 9, the Landlord may at its
option put or cause the same to be put into the condition and state of repair
agreed upon, and in such case the Tenant, on demand, shall pay the cost thereof.

     C. Landlord agrees to keep and maintain the common areas of the Building
consistent with other Class B buildings in the Minneapolis central business
district and to supply janitorial services for only the office and common areas.

ARTICLE 10 - NON-PERMITTED USE
     A. Tenant agrees to use the Premises only for the purposes set forth in
Article 2 hereof. Tenant further agrees not to commit or permit any act to be
performed on the Premises or any omission to occur which shall be in violation
of any statute, regulation or ordinance of any governmental body or which will
increase the insurance rates on the Building or which will be in violation of
any insurance policy carried on the Building by the Landlord. Tenant, at its
expense, shall comply with all governmental laws, ordinances, rules and
regulations applicable to Tenant's particular use of the Premises and shall
promptly comply with all governmental orders, rulings and directives for the
correction, prevention and abatement of any violation upon, or in connection
with Tenant's particular use of the Premises, including the making of any
alterations or improvements to the Premises, all at Tenant's sole cost and
expense. The Tenant shall not disturb other occupants of the Building by making
any undue or unseemly noise and shall not do or permit to be done in or about
the Premises anything which will be dangerous to life or limb. In connection
with the foregoing provision, Tenant covenants and agrees that it shall not
store, process, produce or dispose of any flammables, explosives, radioactive
materials, ACM's, polychlorinated biphenyls (PCB's), chemicals known to cause
cancer or reproductive toxicity, pollutants, contaminants, hazardous waste,
toxic substances, petroleum and petroleum products, chloraflora carbons (CFC's)
and substances declared to be hazardous or toxic (collectively "Hazardous
Substances") in violation of any present or future federal, state or local
environmental law, ordinance or regulation ("Environmental Laws") upon the
Premises or any part thereof without first obtaining Landlord's written consent,
which consent may be withheld or denied in Landlord's sole discretion, provided
that Landlord hereby consents to Hazardous Substances in small quantities as are
typically used in an office building (such as, toner, cleaning fluids, etc.).
Tenant agrees to indemnify and defend and hold Landlord harmless from and
against all fines, suits, claims, actions, damages, liabilities, costs and
expenses (including reasonable attorneys' fees) asserted against Landlord
arising out of and in any way connected with Tenant's failure to comply with its
obligations of this Paragraph or arising from the consented to presence of
Hazardous Substances (specifically including any diesel fuel), which
indemnification shall survive the expiration of the termination of this Lease
Agreement

     B. Landlord represents that it was not the owner of the Building during
construction, and makes no representations as to any Hazardous Substances but
Landlord shall make available that certain Phase I Environmental Report prepared
on behalf of the FDIC/RTC ("Environmental Report") to Tenant. Landlord hereby
covenants that if, at any time during the Term of the Lease Agreement, as the
same may be extended, "Hazardous Substances" are required to be removed,
encapsulated or otherwise remediated by any legal governmental authority having
jurisdiction over the Building, the presence for which Landlord is the
"responsible party" and Tenant is not a "responsible party" (as defined by
Environmental Laws) then Landlord shall so remediate the same as so required,
at Landlord's sole cost and expense and not as a part of Operating Expenses.
Landlord agrees to indemnify and defend and hold Tenant harmless from and
against all fines, suits, claims, actions, damages, liabilities, costs and
expenses (including attorneys' fees) asserted by such governmental authorities
against

                                      -6-
<PAGE>

Tenant arising out of or in any way connected with Landlord's failure to comply
with its obligations in the preceding sentence, which indemnification shall
survive the expiration or the termination of this Lease Agreement.

ARTICLE 11 - INSPECTION
     The Landlord or its employees or agents shall have the right without any
diminution of rent or other charges payable hereunder by Tenant to enter the
Premises at all reasonable times for the purpose of exhibiting the Premises to
prospective tenants or purchasers, inspection, cleaning, repairing, testing,
altering or improving the same or said Building, but nothing contained in this
Article shall be construed so as to impose any obligation on the Landlord to
make any repairs, alterations or improvements. Landlord's rights under this
section shall be exercised in such a manner as to create the least practicable
interference with Tenant's use and occupancy of the Premises. Except in the
case of an emergency which makes notice to Tenant impractical, any entry on the
Premises by Landlord shall be made at reasonable times after reasonable notice
to Tenant. In exercising Landlord's rights of entry, Landlord shall comply with
Tenant's reasonable security regulations of which Landlord has been advised of
in writing. Landlord hereby recognizes that Tenant is engaged in a business that
involves access to privileged and confidential matters and information and
agrees to take reasonable precautions as to not compromise such confidentiality.
Therefore Landlord agrees that Landlord may enter and pass through the Premises
only when accompanied by a representative of Tenant, provided that Tenant agrees
to make such representative available. Landlord agrees that it shall not enter
the Premises for the purpose of exhibiting the Premises to prospective tenants,
except during the last nine (9) months of any Term, or at any time when Tenant
is in default.

ARTICLE 12 - ALTERATIONS
     Tenant will not make any alterations, additions or improvements in or to
the Premises or add, disturb or in any way change any plumbing, wiring,
life/safety or mechanical systems, locks, or structural portions of the Building
without the prior written consent of the Landlord as to the character of the
alterations, additions or improvements to be made, the manner of doing the work,
and the contractor doing the work. Such consent shall not be unreasonably
withheld or delayed, if such alterations, repairs additions or improvements are
required of Tenant or are the obligation of Tenant pursuant to this Lease
Agreement. All such work shall comply with all applicable governmental laws,
ordinances, rules and regulations. Tenant agrees to indemnify and hold Landlord
free and harmless from any liability, loss, cost, damage or expense (including
attorney's fees) by reasons of any said alteration, repairs, additions or
improvements.

ARTICLE 13 - SIGNS
     Tenant agrees that no signs or other advertising materials shall be
erected, attached or affixed to any portion of the interior or exterior of the
Premises or the Building without the express prior written consent of Landlord.
Landlord, at its sole cost and expense, shall install Building standard tenant
graphics at the main entry to the Premises and an identification strip for
Tenant on the Building's lobby directory.

ARTICLE 14 - COMMON AREAS
     A. Tenant agrees that the use of all corridors, passageways, elevators,
toilet rooms, parking areas and landscaped area in and around said Building, by
the Tenant or Tenant's employees, visitors or invitees, shall be subject to such
reasonable rules and regulations as may from tune to time be made by Landlord
for the safety, comfort and convenience of the owners, occupants, tenants and
invitees of said Building. Tenant agrees that no awnings, curtains, drapes or
shades shall be used upon the Premises except as may be approved by Landlord,
such approval not to be unreasonably withheld, delayed or conditioned.

     B. In addition to the Premises, Tenant shall have the right of
non-exclusive use, in common with others, of (a) all unrestricted automobile
parking areas, driveways and walkways, and (b) loading facilities, freight
elevators and other facilities as may be constructed in the Building, all to be
subject to the terms and conditions of this Lease Agreement and to reasonable
rules and regulations for the use thereof as prescribed from time to time by
Landlord.

     C. Landlord shall have the right to make changes or revisions in the site
plan and in the Building so as to provide additional leasing area. Landlord
shall also have the right to construct additional buildings on the land
described on Exhibit A-2 for such purposes as Landlord may deem appropriate.
Subject to Tenant's rights in respect of the Tenant Improvements, Landlord also
reserves all airspace rights above, below and to all sides of the Premises,
including the right to make changes, alterations or provide additional leasing
areas, provided the same do not interfere with Tenant's operations on or from
the Premises.

     D. Landlord and Tenant agree that Landlord will not be responsible for any
loss, theft or damage to vehicles, or the contents thereof, parked or left in
the parking areas of the Building and Tenant agrees to so advise its employees,
visitors or invitees who may use such parking areas. The parking areas shall
include those areas designated by Landlord, in its sole discretion, as either
restricted or unrestricted parking areas. Any restricted parking areas shall be
leased only by separate license agreement with Landlord. Landlord agrees to
provide Tenant, subject to availability, unassigned parking spaces pursuant to
license agreements in the form of Exhibit C. The parking spaces being made
available to Tenant pursuant to this Paragraph shall be made available at the
commencement of the Term and continuing thereafter during the balance of the
Term and Renewal Terms, but only to the extent Tenant continues the initial
number of parking spaces continuously. If Tenant should cease one or more such
parking spaces, then Landlord shall not and does not guaranty that Tenant shall
be entitled to subsequently have such parking spaces available to it.

ARTICLE 15 - ASSIGNMENT AND SUBLETTING
     A. Tenant agrees not to assign, sublet, license, or encumber this Lease
Agreement, the Premises, or any part thereof, whether by voluntary act,
operation of law, or otherwise without the specific prior written consent of
Landlord; provided however, Landlord agrees not to unreasonably withhold, delay
or deny such consent if: i) such assignment or sublease is in writing and the
assignee or sublessee assumes all the obligations of Tenant under this Lease
Agreement; ii) the proposed subtenant or assignee has a net worth of One Million
Dollars ($1,000,000) or more at the time of such assignment or subletting; iii)
the remaining provisions of this Lease Agreement continue to be applicable; and
iv) Tenant shall remain liable hereunder. Landlord further hereby gives its
consent (subject however to Tenant's providing ten (10) days prior written
notice and clauses i), iii) and iv) above being applicable) to an assignment of
this Lease Agreement or sublease of the Premises to an "Affiliate" of Tenant or
to any entity into or with which Tenant is merged or to the purchaser of all or
substantially all the ownership interests or assets of Tenant; provided the
survivor or transferee continues to operate the business of Tenant as a going
concern. For purposes hereof an Affiliate shall mean any party that is "related
to" Tenant as that term is defined by Sec. 267(b) of the Internal Revenue Code
of 1986. Consent by Landlord in one such instance shall not be a waiver of
Landlord's rights under this Article as to requiring consent for any subsequent
instance. In the event Tenant desires to sublet a part or all of the Premises,
or assign this Lease Agreement, Tenant shall give written notice to Landlord at
least thirty (30) days prior to the proposed subletting or assignment, which
notice shall state the name of the proposed subtenant or assignee, the terms of
any sublease or assignment documents and copies of financial reports or other
relevant financial information of the proposed subtenant or assignee. At
Landlord's option, any and all payments by the proposed assignee or sublessee
with respect to the assignment of sublease shall be paid directly to Landlord.
In any event no subletting or assignment shall release Tenant of its obligation
to pay the rent and to perform all other obligations to be performed by Tenant
hereunder for the Term of this Lease Agreement. The acceptance of rent by
Landlord from any other person shall not be deemed to be a waiver by Landlord of
any provision hereof.

     B. Notwithstanding anything to the contrary contained in this Article,
Tenant may collaterally assign, mortgage, pledge, or hypothecate, without
Landlord's consent, its interest in this Lease Agreement to any financing
entity, or agent on behalf of any financing entity to whom Tenant: i) has
obligations for borrowed money or in respect of guarantees thereof, ii) has
obligations evidenced by bonds, debentures, notes, or similar instruments, or
iii) has obligations under or with respect to letters of credit, bankers'
acceptances and similar facilities or in respect of guarantees thereof.

     C. Landlord's right to assign this Lease Agreement is and shall remain
unqualified upon any sale or transfer of the Building and, providing the
purchaser succeeds to the interests of Landlord under this Lease Agreement and
assumes the Landlord's obligations hereunder, Landlord shall thereupon be
entirely freed of all obligations of the Landlord accruing hereunder after such
conveyance and shall not be subject to any liability resulting from any act or
omission or event occurring after such conveyance.

                                       -7-

<PAGE>

ARTICLE 16 - LOSS BY CASUALTY
     A. If the Building is damaged or destroyed by fire or other casualty, the
Landlord shall have the right to terminate this Lease Agreement, provided it
gives written notice thereof to the Tenant within ninety (90) days after such
damage or destruction. If a portion of the Premises or Building is damaged by
fire or other casualty, and in the reasonable opinion of Landlord: i) the
Premises cannot be restored to tenantable condition within a period of ninety
(90) days following the commencement of such restoration work, and/or ii) the
cost of performing such restoration work exceeds the proceeds of Landlord's
casualty insurance by more than $100,000, then Landlord shall not be required to
make any repairs and Landlord shall have the right to terminate this Lease
Agreement upon written notice to Tenant within thirty (30) days of the date of
such fire or other casualty, in which event, this Lease Agreement shall
terminate as of the date of such notice and Landlord and Tenant shall be
released from any and all liability thereafter accruing hereunder. Landlord
shall notify Tenant of its decision to rebuild or not within said thirty (30)
day period. Anything herein to the contrary notwithstanding, if the Premises are
destroyed or so damaged that they cannot be repaired and made tenantable within
ninety (90) days following commencement of such restoration work, or so damaged
that Landlord shall decide not to repair or rebuild, or Landlord decides to
repair or rebuild, or Landlord decides to repair or rebuild, but does not
restore the Premises to a tenantable condition within ninety (90) days after
commencement of such restoration work (subject to an extension of up to an
additional sixty (60) days due to causes beyond Landlord's control), then, in
any of such instances, Tenant may terminate this Lease Agreement by giving
notice to Landlord within thirty (30) days after Tenant's receipt of Landlord's
notice or the expiration of said ninety (90) day period (as extended due to
causes beyond Landlord's control, as set forth above) as applicable, in which
event this Lease Agreement shall terminate as of the date of such notice and
Landlord and Tenant shall be released from any and all liability thereafter
accruing hereunder. If this Lease Agreement has not been terminated by either
Landlord or Tenant, then the rents due hereunder shall abate during such period
of time as the Premises are untenantable, in the proportion that the
untenantable portion of the Premises bears to entire Premises.

     B. If the Premises are to be repaired under this Article 16, Landlord
shall repair any injury or damage to the Building itself and the Premises in
substantially the condition the Premises were in at the execution of this Lease
Agreement, specifically excluding any leasehold improvements constructed by
Tenant, Tenant's Equipment or any Collateral, all of which shall be restored to
the extent Tenant deems necessary, at Tenant's sole cost and expense. Tenant
shall, at its own cost and expense, remove all of its furniture and other
personal property from the Premises as Landlord shall reasonably require in
connection with its repair and restoration of the Premises under this Article
16.

ARTICLE 17 - WAIVER OF SUBROGATION
     Landlord and Tenant hereby release the other from any and all liability or
responsibility to the other or anyone claiming through or under them by way of
subrogation or otherwise for any loss or damage to property caused by fire or
any of the extended coverage or supplementary contract casualties, even if such
fire or other casualty shall have been caused by the fault or negligence of the
other party, or anyone for whom such party may be responsible, provided however,
that this release shall be applicable and in force and effect only with respect
to loss or damage occurring during such times as the releasing party's policies
shall contain a clause or endorsement to the effect that any such release would
not adversely affect or impair said policies or prejudice the right of the
releasing party to recover thereunder. Landlord and Tenant agree that they will
request their insurance carriers to include in their policies such a clause or
endorsement. If extra cost shall be charged therefore, each party shall advise
the other of the amount of the extra cost, and the other party, at its election,
may pay the same, but shall not be obligated to do so.

ARTICLE 18 - EMINENT DOMAIN
     If the entire Building is taken by eminent domain, this Lease Agreement
shall automatically terminate as of the date of taking. If a portion of the
Building is taken by eminent domain, the Landlord shall have the right to
terminate this Lease Agreement, provided it gives written notice thereof to the
Tenant within ninety (90) days after the date of taking. If a portion of the
Premises is taken by eminent domain and this Lease Agreement is not terminated
by Landlord, Tenant shall have the right to terminate this Lease Agreement,
provided it gives written notice thereof to Landlord within ninety (90) days of
the date of taking. If neither Landlord nor Tenant terminates, then the Landlord
shall, at its expense, restore the Premises to as near the condition which
existed immediately prior to the date of taking as reasonably possible, and the
rentals shall abate during such period of time as the Premises are
untenantable, in the proportion that the untenantable portion of the Premises
bears to the entire Premises. All damages awarded for such taking under the
power of eminent domain shall belong to and be the sole property of Landlord,
irrespective of the basis upon which they are awarded, provided, however, that
nothing contained herein shall prevent Tenant from making a separate claim to
the condemning authority for its moving expenses and trade fixtures. For
purposes of this Article, a taking by eminent domain shall include Landlord's
giving of a deed under threat of condemnation, and shall be deemed to occur on
the earlier of the date fee simple title has vested or possession has been
obtained by the taking authority.

ARTICLE 19 - SURRENDER
     On the last day of the Term of this Lease Agreement or on the sooner
termination thereof in accordance with the terms hereof, Tenant shall peaceably
surrender the Premises in good condition and repair consistent with Tenant's
duty to make repairs as provided in Article 9 hereof. On or before said last
day, Tenant shall at its expense remove all of its equipment from the Premises,
repairing any damage caused thereby, and any property not removed shall be
deemed abandoned, with the exception of any "Collateral" (as defined in Article
28 below) to the extent of any security interests by third parties. All
alterations, additions and fixtures other than Tenant's trade fixtures, which
have been made or installed by either Landlord or Tenant upon the Premises shall
remain as Landlord's property and shall be surrendered with the Premises as a
part thereof, or shall be removed by Tenant (unless such right to remove has
been waived by Landlord pursuant to Article 4 above), in which event Tenant
shall at its expense repair any damage caused thereby. It is specifically agreed
that any and all telephonic, coaxial, ethernet, or other computer,
word-processing, facsimile, or electronic wiring installed by Tenant within the
Premises (hereafter "Wiring") shall be removed at Tenant's cost at the
expiration of the Term, unless Landlord has specifically requested in writing
that said Wiring shall remain, whereupon said Wiring shall be surrendered with
the Premises as Landlord's property. If the Premises are not surrendered at the
end of the Term or the sooner termination thereof, Tenant shall indemnify
Landlord against loss or liability resulting from delay by Tenant in so
surrendering the Premises, including, without limitation, claims made by any
succeeding tenant founded on such delay. Tenant shall promptly surrender all
keys for the Premises to Landlord at the place then fixed for payment of rental
and shall inform Landlord of combinations on any locks and safes on the
Premises.

 ARTICLE 20 - NON-PAYMENT OF RENT, DEFAULTS
     If any one or more of the following occurs: (1) a rent payment or any other
payment due from Tenant to Landlord shall be and remain unpaid in whole or in
part for more than ten (10) days after same is due and payable; (2) Tenant shall
violate or default on any of the other covenants, agreements, stipulations or
conditions herein, or in any parking agreement(s) or other agreements between
Landlord and Tenant relating to the Premises, and such violation or default
shall continue for a period of thirty (30) days after written notice from
Landlord of such violation or default or if such violation or default shall
reasonably require longer than thirty (30) days to cure, if Tenant shall fail to
commence the cure of such default or violation within thirty (30) days after
receipt of notice thereof and/or fail to prosecute a cure to completion with due
diligence; (3) if Tenant shall commence or have commenced against Tenant
proceedings under a bankruptcy, receivership, insolvency or similar type of
action; or (4) if Tenant shall abandon the Premises; then it shall be optional
for Landlord, without further notice or demand, to cure such default or to
declare this Lease Agreement forfeited and the said Term ended, or to terminate
only Tenant's right to possession of the Premises, and to re-enter the Premises,
with or without process of law, using such force as may be necessary to remove
all persons or chattels therefrom, and Landlord shall not be liable for damages
by reason of such re-entry or forfeiture; but notwithstanding re-entry by
Landlord or termination only of Tenant's right to possession of the Premises,
the liability of Tenant for the rent and all other sums provided herein shall
not be relinquished or extinguished for the balance of the Term of this Lease
Agreement and Landlord shall be entitled to periodically sue Tenant for all sums
due under this Lease Agreement or which become due prior to judgment, but such
suit shall not bar subsequent suits for any further sums coming due thereafter.
Tenant shall be responsible for, in addition to the rentals and other sums
agreed to be paid hereunder, the cost of any necessary maintenance, repair,
restoration, reletting (including related cost of removal or modification of
tenant improvements) or cure as well as reasonable attorney's fees incurred or
awarded in any suit or action instituted by Landlord to enforce the provisions
of this Lease Agreement, regain possession of the Premises, or the collection of
the rentals due Landlord hereunder. Tenant shall also be liable to Landlord for
the payment of a late charge in the amount of 5% of the rental installment or
other sum due Landlord hereunder if said payment has not been received within
ten (10) days from the date said payment becomes due and payable, or cleared by
Landlord's bank within three (3) business days after deposit. Tenant agrees to
pay interest at the highest permissible rate of interest allowed under the usury
statutes of the State of Minnesota, or in case no such maximum rate of interest
is provided, at the rate of 12% per annum, on all rentals and other sums due
Landlord hereunder not paid within ten (10) days from the date same become due
and payable. Each right or remedy of Landlord provided for in this Lease
Agreement shall be cumulative and shall be in addition to every other right or
remedy provided for in this Lease Agreement now or hereafter existing at law or
in equity or by statute or otherwise.

                                      -8-
<PAGE>

ARTICLE 21 - LANDLORD'S DEFAULT
     Landlord shall not be deemed to be in default under this Lease Agreement
until Tenant has given Landlord written notice specifying the nature of the
default and Landlord does not cure such default within thirty (30) days after
receipt of such notice or within such reasonable time thereafter as may be
necessary to cure such default where such default is of such a character as to
reasonably require more than thirty (30) days to cure.

ARTICLE 22 - HOLDING OVER

     Tenant will, at the expiration of this Lease Agreement, whether by lapse of
time or termination, give up immediate possession to Landlord. If Tenant fails
to give up possession Landlord may, at its option, serve written notice upon
Tenant that such holdover constitutes any one of (i) creation of a month to
month tenancy, or (ii) creation of a tenancy at sufferance. If Landlord does not
give said notice, Tenant's holdover shall create a tenancy at sufferance. In any
such event the tenancy shall be upon the terms and conditions of this Lease
Agreement, except that the Minimum Rental shall be 150% the Minimum Rental
Tenant was obligated to pay Landlord under this Lease Agreement immediately
prior to termination (in the case of tenancy at sufferance such Minimum Rental
shall be prorated on the basis of a 365 day year for each day Tenant remains in
possession); excepting further that in the case of a tenancy at sufferance, no
notices shall be required prior to commencement of any legal action to gain
repossession of the Premises. In the case of a tenancy at sufferance, Tenant
shall also pay to Landlord all damages sustained by Landlord resulting from
retention of possession by Tenant, provided such damages shall not include
consequential damages if such holdover is for five (5) business days or less.
The provisions of this paragraph shall not constitute a waiver by Landlord of
any right of re-entry as otherwise available to Landlord; nor shall receipt of
any rent or any other act in apparent affirmance of the tenancy operate as a
waiver of the right to terminate this Lease Agreement for a breach by Tenant
hereof.

ARTICLE 23 - SUBORDINATION
     Tenant agrees that this Lease Agreement shall be subordinate to any
mortgage(s) that may now or hereafter be placed upon the Building or any part
thereof, and to any and all advances to be made thereunder, and to the interest
thereon, and all renewals, replacements, and extensions thereof and to execute a
specific subordination agreement (in a form reasonably requested by mortgagee)
if so requested by Landlord, provided the mortgagee named in such subordination
shall agree to recognize this Lease Agreement or Tenant in the event of
foreclosure provided the Tenant is not in default by including non-disturbance
language, in recordable form. In the event of any mortgagee electing to have the
Lease Agreement a prior encumbrance to its mortgage, then and in such event upon
such mortgagee notifying Tenant to that effect, this Lease Agreement shall be
deemed prior in encumbrance to the said mortgage, whether this Lease Agreement
is dated prior to or subsequent to the date of said mortgage. Landlord shall use
its best efforts to obtain a non-disturbance agreement from the existing
mortgagee (the Federal Deposit Insurance Corporation) and any future mortgagees,
in a form reasonably satisfactory to such mortgagee and Tenant.

ARTICLE 24 - INDEMNITY, INSURANCE AND SECURITY
     A. Tenant will keep in force at its own expense for so long as this Lease
Agreement remains in effect public liability insurance with respect to the
Premises in which Landlord shall be named as an additional insured, in companies
and in form acceptable to Landlord with a minimum combined limit of liability of
Two Million Dollars ($2,000,000.00). This limit shall apply per location. Said
insurance shall also provide for contractual liability coverage by endorsement.
Tenant shall further provide for business interruption insurance to cover a
period of not less than six (6) months. Tenant will further deposit with
Landlord the policy or policies of such insurance or certificates thereof, or
other acceptable evidence that such insurance is in effect, which evidence shall
provide that Landlord shall be notified in writing thirty (30) days prior to
cancellation, material change, or failure to renew the insurance. Tenant further
covenants and agrees to indemnify and hold Landlord and Landlord's manager of
the Building harmless for any claim, loss or damage, including reasonable
attorney's fees, suffered by Landlord, Landlord's manager or Landlord's other
tenants caused by: i) any act or omission by Tenant, Tenant's employees or
anyone claiming through or by Tenant in, at, or around the Premises or the
Building; ii) the conduct or management of any work or thing whatsoever done by
Tenant in or about the Premises; or iii) Tenant's failure to comply with any and
all governmental laws, rules, ordinances or regulations applicable to Tenant's
particular use of the Premises. If Tenant shall not comply with its covenants
made in this Article 24, Landlord may, at its option, cause insurance as
aforesaid to be issued and in such event Tenant agrees to pay the premium for
such insurance promptly upon Landlord's demand.

     B. Tenant shall be responsible for the security and safeguarding of the
Premises and all property kept, stored or maintained in the Premises. Landlord
will make available to Tenant, at Tenant's request, the plans and specifications
for construction of the Building and the Premises. Tenant represents that it is
satisfied that the configuration of the Building and the Premises, including the
location and dimensions of the floors, walls, windows, doors and means of access
thereto are suitable for the particular needs of Tenant's business. The
placement and sufficiency of all safes, vaults, cash or security drawers,
cabinets or the like placed upon the Premises by Tenant shall be at the sole
responsibility and risk of Tenant. Tenant shall maintain in force throughout the
Term, insurance upon all contents of the Premises, including that owned by
others and Tenant's equipment and any alterations, additions, fixtures, or
improvements in the Premises acknowledged by Landlord to be the Tenant's.

     C. Landlord shall carry and cause to be in full force and effect a fire and
extended coverage insurance policy on the Building, but not contents owned,
leased or otherwise in possession of Tenant. Landlord will also keep in force
during this Term public liability insurance with respect to the Building with a
minimum combined limit of liability of $2,000,000. The cost of such insurance
shall be an Operating Expense.

ARTICLE 25 - NOTICES
     All notices from Tenant to Landlord required or permitted by any provisions
of this Lease Agreement shall be directed to Landlord postage prepaid, certified
or registered mail or sent by U.S. express mail or any nationally recognized
overnight carrier with a signed receipt obtained upon delivery, at the address
provided for Landlord in the preamble to this Lease Agreement or at such other
address as Tenant shall be advised to use by Landlord. All notices from Landlord
to Tenant required or permitted by any provision of this Lease Agreement shall
be directed to Tenant, postage prepaid, certified or registered mail or sent by
U.S. express mail or any nationally recognized overnight carrier with a signed
receipt obtained upon delivery, at: Landlord and Tenant shall each have the
right at any time and from time to time to designate one (1) additional party to
whom copies of any notice shall be sent

 ARTICLE 26 - APPLICABLE LAW
     This Lease Agreement shall be construed under the laws of the State of
Minnesota.

 ARTICLE 27 - MECHANICS' LIEN
     In the event any mechanic's lien shall at any time be filed against the
Premises or any part of the Building by reason of work, labor, services or
materials performed or furnished to Tenant or to anyone holding the Premises
through or under Tenant, Tenant shall forthwith cause the same to be discharged
of record. Tenant shall and hereby does indemnify Landlord from and against all
costs, damages and expenses (including reasonable attorney's fees) incurred by
Landlord as a result of any such mechanic's lien. If Tenant shall fail to cause
such lien forthwith to be discharged within twenty (20) days after being
notified of the filing thereof, then, in addition to any other right or remedy
of Landlord, Landlord may, but shall not be obligated to, discharge the same by
paying the amount claimed to be due, or by bonding, and the amount so paid by
Landlord and all costs and expenses, including reasonable attorney's fees
incurred by Landlord in procuring the discharge of such lien, shall be due and
payable in full by Tenant to Landlord on demand. Landlord shall have the right
to post on the Premises notices of nonresponsibility for payment of labor and
materials supplied to the Premises pursuant to applicable law.

 ARTICLE 28 - SECURITY DEPOSIT
     INTENTIONALLY DELETED.

 ARTICLE 29 - BROKERAGE
     Each of the parties represents and warrants that there are no claims for
brokerage commissions or finder's fees in connection with this Lease Agreement
and agrees to indemnify the other against, and hold it harmless from all
liabilities arising from any other such claim, including without limitation, the
cost of attorney's fees in connection therewith.

                                      -9-
<PAGE>

ARTICLE 30 - EXCULPATION
     Tenant agrees to look solely to Landlord's interest in the Building for the
recovery of any judgment from Landlord, it being agreed that Landlord and
Landlord's partners, whether general or limited (if Landlord is a partnership)
or its directors, officers or shareholders (if Landlord is a corporation), shall
never be personally liable for any such judgment.

ARTICLE 31- ESTOPPEL CERTIFICATES
     Each party hereto agrees that at any time, and from time to time during the
Term of this Lease Agreement (but not more often than twice in each calendar
year), within ten (1O) days after request by the other party hereto, it will
execute, acknowledge and deliver to such other party or to any prospective
purchaser, assignee or mortgagee designated by such other party, an estoppel
certificate in a form acceptable to Landlord. Tenant agrees to provide Landlord
(but not more often than twice in any calendar year), within ten (10) days of
request, the then most current financial statements of Tenant arid any
guarantors of this Lease Agreement, which shall be certified by Tenant, and if
available, shall be audited and certified by a certified public accountant.
Landlord shall keep such financial statements confidential, except Landlord
shall, in confidence, be entitled to disclose such financial statements to
existing or prospective mortgagees or purchasers of the Building.

ARTICLE 32 - GENERAL
     This Lease Agreement does not create the relationship of principal and
agent or of partnership or of joint venture or of any association between
Landlord and Tenant, the sole relationship between Landlord and Tenant being
that of landlord and tenant. No waiver of any default of Tenant hereunder shall
be implied from any omission by Landlord to take any action on account of such
default if such default persists or is repeated, and no express waiver shall
affect any default other than the default specified in the express waiver and
that only for the time and to the extent therein stated. The covenants of Tenant
to pay the Minimum Rental and the Additional Rental are each independent of any
other covenant, condition, or provision contained in this Lease Agreement. The
marginal or topical headings of the several Articles, paragraphs and clauses are
for convenience only and do not define, limit or construe the contents of such
Articles, paragraphs or clauses. All preliminary negotiations are merged into
and incorporated in this Lease Agreement. This Lease Agreement can only be
modified or amended by an agreement in writing signed by the parties hereto. All
provisions hereof shall be binding upon the heirs, successors and assigns of
each party hereto. If any term or provision of this Lease Agreement shall to any
extent be held invalid or unenforceable, the remainder shall not be affected
thereby, and each other term and provision of this Lease Agreement shall be
valid and be enforced to the fullest extent permitted by law. If Tenant is a
corporation, each individual executing this Lease Agreement on behalf of said
corporation represents and warrants that he is duly authorized to execute and
deliver this Lease Agreement on behalf of said corporation in accordance with a
duly adopted resolution of the Board of Directors of said corporation or in
accordance with the Bylaws of said corporation, and that this Lease Agreement is
binding upon said corporation in accordance with its terms. No receipt or
acceptance by Landlord from Tenant of less than the monthly rent herein
stipulated shall be deemed to be other than a partial payment on account for any
due and unpaid stipulated rent; no endorsement or statement of any check or any
letter or other writing accompanying any check or payment of rent to Landlord
shall be deemed an accord and satisfaction, and Landlord may accept and
negotiate such check or payment without prejudice to Landlord's rights to (i)
recover the remaining balance of such unpaid rent or (ii) pursue any other
remedy provided in this Lease Agreement. Either party may record a memorandum of
this Lease Agreement and the parties agree to execute a reasonable form
memorandum as presented by the other party. Time is of the essence with respect
to the due performance of the terms, covenants and conditions herein contained.
Submission of this instrument for examination does not, constitute a reservation
of or option for the Premises, and this Lease Agreement shall become effective
only upon execution and delivery thereof by Landlord and Tenant.

ARTICLE 33 - QUIET ENJOYMENT
     Landlord covenants that Tenant, upon paying the rental and other charges
due hereunder and performing all of Tenant's obligations under this Lease
Agreement, shall peacefully and quietly hold, occupy and enjoy Premises
throughout the Term hereof, without molestation or hindrance by any person
holding, under or through Landlord, subject, however, to the provisions of this
Lease Agreement and to any mortgages or ground or underlying leases referred to
in Article 23 hereof. Any diminution or shutting off of light, air or view by
any structure which may be erected on lands adjacent to the Building shall in no
way affect this Lease Agreement or impose any liability on Landlord.

ARTICLE 34 - LIMITED EXPANSION RIGHT
     A. Provided Tenant is not then in default under this Lease Agreement beyond
the applicable grace period, Tenant shall have a right of leasing space
contiguous to the Premises on the third floor of the Building (hereafter
referred to as the "Option Space"), in the event such Option Space becomes
"Available for Leasing" (as defined below) during the original Term, subject to
and conditioned upon the provisions of this Article (the "Expansion Right").

     B. Landlord shall notify Tenant ("Landlord's Notice") in the event the
Option Space becomes "Available for Leasing"; or in the event Landlord has a
third party interested in leasing the Option Space which is then "Available for
Leasing". Tenant shall notify Landlord ("Tenant's Leasing Notice") within five
(5) business days after its receipt of Landlord's Notice as to whether Tenant
intends to exercise its Expansion Right with respect to said Option Space as so
identified in Landlord's Notice, time being of the essence. If Tenant exercises
its Expansion Right, it must do so with respect to all the Option Space as so
identified in Landlord's Notice. In such event, Landlord and Tenant shall
execute an amendment to the Lease Agreement incorporating the Option Space as so
identified into the Premises at the Minimum Rent at the then applicable rates as
set forth in the table of Paragraph 3B above. In the event Tenant fails to
notify Landlord within the time period set forth above, Tenant's rights under
this Article shall be null and void with respect to any lease entered into with
respect to the original prospective Tenant for the Option Space as so identified
in Landlord's Notice; provided such Expansion Right shall again be applicable in
the event Landlord does not lease such Option Space to the original prospective
Tenant within nine (9) months of the Landlord's Notice.

     C. Tenant's Expansion Right shall also include Tenant's providing Landlord
a Tenant's Leasing Notice (in the first instance and not in response to a
Landlord's Notice) with respect to the Option Space which is then "Available for
Leasing" provided no Landlord's Notice has been given to Tenant with respect to
any portion of such Option Space within the previous nine (9) months.

     D. The leasing of said Option Space shall commence as of the "Effective
Date" (as set forth below) and shall be in said Option Space's, then "AS-IS"
condition without any improvements, improvement allowances or other
modifications to be made by Landlord. For purposes of this Article, the
"Effective Date" shall mean the date on which Tenant shall begin paying rentals
upon the Option Space after it has exercised its rights to said space; which
shall be thirty (30) days after Tenant's Leasing Notice under this Article to
Landlord exercising its rights hereunder (or such sooner date as Tenant takes
possession and commences its business operations from within the Option Space).
The provisions of this Lease Agreement governing alterations of the Premises
shall apply with respect to the construction of any leasehold improvements
Tenant desires to make to such Option Space.

     E. Notwithstanding anything to the contrary in the foregoing, if Tenant
exercises its rights under this Article and there remains less than thirty-six
(36) months from the Effective Date to the expiration of the Term, then the
Tenant shall not be entitled to exercise its rights under this Article unless it
exercises its Option to Renew the Term, or if no such Option to Renew can then
be exercised, then Tenant shall no longer have any rights under this Article
with respect to the Option Space.

     F. For purposes of this Article, "Available for Leasing" shall mean the
Option Space is not subject to any existing (as of the date of this Lease
Agreement) lease or first rights of refusal, first rights of negotiation, first
rights of leasing, expansion rights, renewal rights and/or similar rights of any
other third party tenant or such rights have been waived in writing (provided if
all such rights are to expire within six (6) months, Landlord may make such
Option Space Available for Leasing contingent upon the expiration of such
rights). In any event Landlord shall be entitled to renew or extend any lease of
an "Occupying Third Party" (as defined below), without providing Tenant a
Landlord's Notice and without it being subject to any rights of a third party
under this Article. Tenants which are either presently occupying Option Space
or may be so occupying in the future pursuant to a third party lease which was
entered into after Tenant's rights were waived or deemed waived pursuant to
Paragraph B of this Article shall be deemed to be an "Occupying Third Party".

     G. If the Lease Agreement or Tenant's right to possession of the Premises
shall terminate in any manner whatsoever before Tenant shall exercise its rights
under this Article, or if Tenant shall have subleased or assigned all or any
portion of the Premises, then immediately upon such termination, sublease, or
assignment, then this Article and Tenant's rights hereunder shall simultaneously
terminate and become null and void. Such right is personal to

                                      -10-
<PAGE>

Tenant. Under no circumstances whatsoever shall the assignee under a complete or
partial assignment of the Lease, or a subtenant under a sublease of the
Premises, have any right to exercise any rights under this Article or have any
right to receive any Landlord's Notice.

ARTICLE 35 - CANCELLATION RIGHT

     A. Tenant shall have two separate rights to notify Landlord, that it elects
to terminate this Lease as of the end of the sixtieth (60th) or the
eighty-fourth (84) month of the Term, subject to and conditioned upon the
following conditions:

     i. Tenant shall give Landlord written notice of Tenant's intention to
     terminate this Lease not less than six (6) months prior to either the fifth
     (5th) or the seventh (7th) anniversaries of the Term, in accordance with
     the notice provisions set forth above ("Termination Notice");

    ii. The Termination Notice shall set forth the effective date for said
    termination ("Termination Date") which date shall be midnight of the day
    prior to: i) the fifth (5th) anniversary of the Term (if the Termination
    Notice is given prior to the fifty-fourth (54th) month of the Term), or ii)
    the seventh (7th) anniversary of the Term (if the Termination Notice is
    given after the fifty-fourth (54th) month but prior to the seventy-eighth
    (78th) month of the Term);

    iii.  Tenant must not be in default either at the time of the Termination
    Notice nor at the Termination Date and Tenant must comply with all of the
    terms and conditions of this Lease Agreement (including surrender of the
    Premises as required by this Lease Agreement) through the Termination Date;

    iv. Tenant must accompany said Termination Notice with a "Termination Fee",
    which shall be equal to six (6) months rental which would otherwise have
    been due under this Lease Agreement immediately following the Termination
    Date.

    v. In no event shall Tenant be entitled to terminate this Lease if it has
    exercised its rights to renew under Article 1 above.

     B. The rights provided to Tenant under this Article are personal to Tenant,
which may assign them only in connection with an assignment of this Lease
Agreement to a company controlled by or which controls (directly or indirectly)
Advanced Telecommunications, Inc. ("Affiliate"), and such rights shall expire
automatically if Tenant assigns this Lease Agreement to any other party or
subleases all or any portion of the Premises to any other party.

     C. Tenant's rights under this Article may be exercise only once, but at
either of the two (2) time periods set forth above.

     D. Notwithstanding anything contained in this Article to the contrary, if
Tenant exercises its Expansion Right pursuant or in response to a "Landlord's
Notice" (as defined in Paragraph 34B above), then Tenant's right to give a
Termination Notice under this Article shall be suspended for a period commencing
with Tenant's giving of its "Tenant's Leasing Notice" (as defined in Paragraph
34B above) and continuing through the 18th month subsequent to the "Effective
Date" (as defined in Paragraph 34D above). Any Termination Notice given during
such period shall be of no effect and shall not result in the termination of
this Lease Agreement. The restrictions of this Paragraph, and specifically the
suspension of Tenant's right to give a Termination Notice under this Article
shall not become applicable if Tenant exercises its Expansion Right pursuant to
Paragraph 35C above (i.e. Tenant shall continue to have the rights to terminate
under this Article if Tenant's expansion was not in response to a "Landlord's
Notice").

     IN WITNESS WHEREOF, this Lease Agreement has been duly executed by the
parties hereto as of the day and year indicated above.

TENANT: ADVANCE TELECOMMUNICATIONS, INC.      LANDLORD: TIMESHARE SYSTEMS, INC.

By:       [ILLEGIBLE]                         By:   [ILLEGIBLE]
   ------------------------------------          -------------------------------
Its:                                          Its:
    -----------------------------------           ------------------------------

By:                                           By:
   ------------------------------------          -------------------------------
Its:                                          Its:   [ILLEGIBLE]
    -----------------------------------           ------------------------------

DATE:   [ILLEGIBLE]                             DATE: 8/1/99
     ----------------------------------

                              SCHEDULE OF EXHIBITS

     Exhibit A-1               Graphical depiction of Premises
     Exhibit A-2               Legal Description of Land and Building
     Exhibit B                 License Agreement (Antenna)
     Exhibit C                 License Agreement (Parking Lot Unassigned)
     Exhibit D                 Rules and Regulations
     Exhibit E                 Chiller License Agreement

                                      -11-

<PAGE>

                                   EXHIBIT A-2
                                LEGAL DESCRIPTI0N

All of Block 7, Atwaters Addition to the Town of Minneapolis; all of Block 8,
Morrison, Smith and Hancocks Addition to Minneapolis; and that part of 12th
Avenue South, Morrison, Smith and Hancocks Addition to Minneapolis; and
Atwaters Addition to the Town of Minneapolis, lying Southwesterly of a line
connecting the most Easterly corner of Block 7, Morrison, Smith and Hancocks
Addition to Minneapolis; and the most Northerly corner of Block 8, Morrison,
Smith and Hancocks Addition to Minneapolis and Northeasterly of a line
connecting the most Southerly corner of Block 7, Atwaters Addition to the Town
of Minneapolis and the most Westerly corner of Block 8, Atwaters Addition to the
Town of Minneapolis and that part of Block 8, Atwaters Addition to the Town of
Minneapolis; except that part of said Block 8 which lies Northeasterly of the
following described line:

Beginning at a point on the Southeasterly line of Lot 7, Block 8, distant
116.50 feet Southwesterly of the most Easterly corner thereof; thence run
Northwesterly to a point on the Northwesterly line of the Southeasterly half of
Lot 9, said Block 8, distant 10 feet Southwesterly of the Northeasterly line of
said Lot 9, and there terminating.

Also except that part of the Northwesterly 1/2 of Lot 9, Block 8, Atwater's
Addition to the Town of Minneapolis which lies Northeasterly of the following
described line: Beginning at a point on the Southeasterly line of the
Northwesterly 1/2 of Lot 9, Block 8, said Addition, distant 5 feet Southwesterly
of the most Easterly corner thereof, thence run Northwesterly to the most
Northerly corner of Lot 9 and there terminating.

All of Block 7, Morrison, Smith and Hancocks Addition to Minneapolis, except
that part of Lots 9, 10, 11 and 12 of said Block 7, described as follows:

Beginning at the most Northerly corner of said Lot 12; thence south 30 degrees
04 minutes 33 seconds West, on an assumed bearing, along the Northwesterly line
of said Lot 12, a distance of 127.58 feet; thence Easterly, a distance of 259.94
feet along a non-tangential curve concave to the South having a radius of 240.00
feet, a central angle of 62 degrees 03 minutes 21 seconds and the chord of said
curve bears North 89 degrees 04 minutes 43 seconds East; thence North 30 degrees
06 minutes 24 seconds East along the prolongation of a radial line of said
curve, a distance of 0.08 feet to the Northeasterly line of said Lot 9; thence
North 59 degrees 54 minutes 07 seconds West along the Northeasterly line of said
Block 7, a distance of 212.08 feet to the point of beginning.

All according to the plats thereof on file and of record in the Hennepin County
Recorders Office and in the Office of the Registrar of Titles, and situate in
Hennepin County, Minnesota.

Part of the above shown below as Parcels 1 through 4, is Registered Property as
evidenced by Certificate No. 830754. Said Registered Property is described as
follows:

Parcel 1: Lots 3, 6, 8 and 9, Block 7;

That part of Lot 7, Block 7 lying Northeasterly of a line drawn parallel with
and distant 96 feet Southwesterly of the Southwesterly boundary line of 5th St;
The Northeasterly 60 feet of the Southwesterly 105 feet of Lot 1, Block 8;
Lots 2, 3, 4, 5, 6 and 10, Block 8;
That part of the Northwesterly 1/2 of vacated 12th Avenue South lying between
the extensions across it of the Northeasterly and Southwesterly lines of said
Lot 6, Block 7 and
That part of the Southeasterly 1/2 of vacated 12th Avenue South lying between
the extensions across it of the Northeasterly and Southwesterly lines of said
Northeasterly 60 feet of the Southwesterly 105 feet of Lot 1, Block 8, all in
Atwaters Addition to the Town of Minneapolis.

Parcel 2: That part of the following described Tract:
The Northwesterly 27 feet of the Northeasterly 100 feet of Lot 7;
The Southwesterly 39 feet of the Northeasterly 139 feet of Lot 7;
The Northwesterly 1/2 of Lot 8 and
The Southeasterly 1/2 of Lot 9,
all in Block 8, Atwaters Addition to the Town of Minneapolis, which lies
Southwesterly of a line drawn from a point on the Southeasterly line of said
Lot 7, distant 116.50 feet Southwesterly of the most Easterly corner thereof to
a point on the Northwesterly line of said Southeasterly 1/2 of Lot 9, distant
10 feet Southwesterly of the Northeasterly line thereof.

Parcel 3: Lots 3 and 8, Block 7,
That part of Lot 7, Block 7 lying Northeasterly of a line drawn parallel with
and distant 96 feet Southwesterly of the Southwesterly boundary line of 5th
Street and Lot 9. Block 7 except that part thereof lying Northerly of the
following described line: Beginning at the most Northerly corner of Lot 12, said
Block 7; thence South 30 degrees 04 minutes 33 seconds West, on an assumed
bearing, along the Northwesterly line of said Lot 12, a distance of 127.58
feet; thence Easterly, a distance of 259.94 feet along a non-tangential curve
concave to the South, having a radius of 240.00 feet, a central angle of 62
degrees, 03 minutes, 21 seconds and the chord of said curve bears North 89
degrees, 04 minutes, 43 seconds East, thence North 30 degrees, 06 minutes, 24
seconds East along the prolongation of a radial line of said curve, a distance
of 0.08 feet to the Northeasterly line of said Lot 9 and said line there
terminating,
all in Morrison, Smith and Hancocks Addition to Minneapolis.

Parcel 4: That part of the Northwesterly 1/2 of vacated 12th Avenue south lying
between the extensions across it of the Northeasterly line of Lot 7, Block 7,
Morrison, Smith and Hancocks Addition to Minneapolis and a line drawn parallel
to and distant 96 feet Southwesterly of the Northeasterly line of said Lot 7

Subject to minerals and mineral rights reserved by the State of Minnesota; (As
to all of above land except Lot 3, Block 7 in Parcel 1; Lot 3, Block 7 in Parcel
3 and the above portion of Lot 9, Block 8 in Parcel 2; and except that part of
Lot 6, Block 7 and of that part of the Northwesterly 1/2 of vacated 12th Avenue
South in Parcel 1 lying Northeasterly of extensions across it of the
Southwesterly line of said Lot 6 and its extension);

Subject to covenants, restrictions, reservations and conditions subsequent,
including a right of re-entry and forfeiture of title upon default as contained
in Deed Doc. No. 1488605; (See Inst)

                                     A-2-1

<PAGE>

                                    EXHIBIT B

                           ANTENNAE LICENSE AGREEMENT

     This License Agreement (the "Agreement"), dated as of this 3rd day of
March, 1999, is between TIMESHARE SYSTEMS, INC. (the "Licensor"), having an
address at 511 Eleventh Avenue South, Minneapolis, MN. 55415 and ADVANCED
TELECOMMUNICATIONS, INC. (the "Licensee"), having an address at 511 Eleventh
Avenue South, Minneapolis, MN. 55415 (the "Premises").

     A. Licensor agrees to permit licensee to utilize for purposes provided
herein, the roof space (the exact location to be determined by Licensor with the
reasonable consent of Licensee, but in no event shall such space exceed 100
contiguous square feet) on the building ("Building") in which the Premises are
located (the "Roof Space"), from the date hereof and expiring April 30, 2099.
Upon termination of Licensee's lease for the Premises for any reason (including
the failure to renew the Term), this License Agreement and the license created
hereby shall automatically expire with said termination. The termination,
cancellation or expiration of this License Agreement or the license created
hereunder shall not be cause or grounds for the cancellation or termination of
Licensee's lease for the Premises.

     H. Licensee may install, use and maintain on such Roof Space equipment
("Equipment") as described in Exhibit A attached hereto. If so requested by
Licensor, Licensee shall, at its sole expense, install a screening and
protective fence ("Fence") around the perimeter of the Roof Space. The Fence
style and installation shall be subject to Licensor's prior approval.

     I. Licensor agrees that Licensee may run cables (the "Cables") between the
Roof Space and the Licensee's Premises. Any damages to the Building or fixtures
or equipment located upon or within the Building resulting therefrom shall be
promptly repaired by Licensee.

     J. The Equipment and Fence shall remain the property of the Licensee or its
contractor. Licensee shall at its cost remove such Equipment and Fence (and if
so requested by Licensor, the Cables) at the expiration or sooner termination of
the license granted hereunder or this License Agreement, and restore the Roof
Space and Building to the condition they were in prior to Licensee's
installation of the Equipment, Fence and Cables. The obligations to remove the
Equipment, Fence and Cables and to restore and repair the Roof Space and
Building shall survive the expiration or sooner termination of the license and
this License Agreement.

     K. Licensee and/or its contractor shall bear all expenses in connection
with the installation, use and maintenance of such Equipment, Fence and Cables
and removal of the same. Licensee shall indemnify and hold Licensor harmless
from and against liability, damages, costs and expenses, including reasonable
attorney's fees incurred by Licensor, arising out of Licensee's installation,
use, maintenance and removal of the Equipment, Fence and Cables. This
obligation shall survive the expiration, cancellation or termination of this
License Agreement and the license created hereunder.

     L. Licensee and/or its contractor shall maintain in force during the term
of this License Agreement comprehensive liability insurance in amounts and in
such form as reasonably satisfactory to Licensor, protecting Licensor against
any liability, damages, cost or expenses, in connection with the installation,
use, maintenance and removal of the Equipment, Fence and Cables and shall
supply the appropriate certificates of such insurance upon request.

     M. Licensee and its contractors shall comply with all applicable federal,
state and local laws, regulations, and building codes in connection with the
installation, use, maintenance and removal of the Equipment, Fence and
Cables. In the event any such laws, regulations, or codes requires physical
improvements be made to the Building or other expenditures by or on behalf of
the Building and/or its owner, the costs of the same shall be borne by Licensee.
Notwithstanding the foregoing, any physical improvements, whether required by
law, regulation, code or otherwise, shall be subject to Licensor's approval,
which approval may be given or denied in Licensor's sole discretion. If any law,
regulation or code prohibits or disallows the Equipment, Fence and/or Cables or
the effective use of the license granted hereby, whether now or in the future,
Licensor shall be entitled to terminate the license granted hereby, without
penalty; and Licensee shall take such action so as to allow the Building to
again be in compliance with such law, regulation or code, including, if
necessary, the removal of the Equipment, Fence and/or Cables.

     N. Licenser agrees to permit Licensee reasonable access to the Roof Space
and other areas so as to facilitate the installation, use, maintenance and
removal of the Equipment, Fence, and Cables. Licensee shall have access to the
Roof Space on a 24 hour per day, 7 days per week basis, in order to facilitate
maintenance and repairs. Licensee agrees to sign the Building's log book on each
occasion Licensee enters the Roof Space, during normal business hours. At times
other than normal business hours, or when the log book is not available for
signing, Tenant shall page Landlord at 470-4500 or shall leave a message by
calling 481-9999 or shall notify Landlord by such other reasonable means as
Landlord shall inform Tenant in writing.

     O. Notwithstanding anything else contained herein to the contrary, the
license granted herein is subject to the non-interference of Licensee's
Equipment with the normal operation, functioning and use of any other equipment
(whether owned by Licensor or by other licensees and/or tenants of Licensor)
currently existing upon the roof of the Building. In the event of any such
interference, Licensor may terminate the License granted hereunder if such
interference is not corrected within three (3) days notice from Licensor to
Licensee. Notwithstanding anything else contained herein to the contrary,
Licensor does not guaranty nor warrant the reception, noninterference or
effective use of Licensee's antenna, or Equipment, either at initial
installation nor thereafter.

     P. Licensee shall be required to get prior approval from Licensor
pertaining to the Antenna size, color, Fence specifications, location on roof,
method of mounting and the location of all Cables. In no instance shall this
installation breach or penetrate the roof membrane.

     Q. Any notice required or desired under this License Agreement shall be
deemed sufficiently given if given in compliance with the Licensee's lease
agreement for the Premises.

     R. Licensee shall pay to Licensor, without set-off, or demand the sum of
$O per month for all Antennae (as listed on Exhibit A, or otherwise located on
the Building pursuant to this License Agreement or the license created
hereunder) for use of the roof space ("License Fee") during the Terms of this
License Agreement. Failure by Licensee to pay said License Fee shall entitle
Licensor, upon 10 days written notice to Licensee, to terminate this License
Agreement and the license created hereunder, and to such other relief as may be
allowed by law or equity. No other Equipment or antennae shall be permitted by
this license, without Licensor's prior written consent, which consent shall not
be unreasonably withheld for a reasonable increase in equipment, provided the
License Fee shall be increased to Licensor's then rate for each additional
antennae.

     S. In the event of default by Licensee of any of the terms and conditions
set forth in this License Agreement, whether suit be commenced or not, Licensee
agrees to pay the attorneys' fees, costs and expenses of Licensor incurred in
enforcing or attempting to enforce this License Agreement.

     T. Licensee shall operate the Licensee facilities in a manner that will not
cause interference to Licensor and other Licensees of the Property provided that
their installations predate that of the Licensee's facilities. All operations by
Licensee shall be in compliance with all Federal Communications Commission
("FCC") requirements.

     U. Licensor waives any lien rights it may have concerning the Equipment
which are deemed Licensee's personal property and not fixtures, and Licensee has
the right to remove the same at any time without Licensor's consent.

     V. This Agreement may be terminated without further liability on thirty
(30) days prior written notice as follows: (i) by either party upon a default of
any covenant or term hereof by the other party, which default is not cured
within sixty (60) days of receipt of written notice or default provided that the
grace period for any monetary default is ten (l0) days from receipt of notice;
or (ii) by Licensee for any reason or for no reason, provided Licensee delivers
written notice of early termination to Licensor with a thirty (30) day notice
provision prior to termination; or (iii) by Licensee if it does not obtain or
maintain any license, permit or other approval necessary for the construction
and operation of the Equipment; or (iv) by Licensee if Licensee is unable to
occupy and utilize the Premises under Licensee's (lease due to an action of the
FCC, including without limitation, a take back of channels or change in
frequencies; or (v) by Licensee if Licensee determines that the Premises are not
appropriate for its operations for technological reasons, including, without
limitation, signal interference.

     W. If the Premises or Equipment are damaged, destroyed, condemned or
transferred in lieu of condemnation, Licensee may elect to terminate this
Agreement as of the date of the damage, destruction, condemnation or transfer in
lieu of condemnation by giving notice to Licensor no more than forty-five (45)
days following the date of such damage, destruction, condemnation or transfer in
lieu of condemnation.

     X. Licensee may not assign, or otherwise transfer all or any part of its
interest in this Agreement without the prior written consent of Licensor,
provided, however, that Licensee may assign its interest to any party to which
it is assigning its interest in the Premises under its lease

                                   B-1

<PAGE>

     Y. Licensor shall be responsible for compliance with all marking and
lighting requirements of the Federal Aviation Administration ("FAA") and the
FCC. Should Licensee be cited because the Property is not in compliance and,
should Licensor fail to cure the conditions of noncompliance, Licensee may
either terminate this Agreement or proceed to cure the conditions of
noncompliance of Licensor's expense, which accounts may be deducted from the
rent under Licensee's lease.

     Z. In no event shall Licensee be entitled to erect any mono pole or
other tower-type structure.

     U. In the event the Equipment, Fence and/or Cables should interfere with
any roof maintenance, repair and/or replacement which Licensor deems necessary
to perform, Licensor shall first notify Licensee and then Licensee shall
cooperate with Licensor and its contractors to remove such interference,
including if necessary, the relocation and/or temporary relocation of the
Equipment, Fence and/or Cables. Such cooperation including such relocations
and/or temporary relocations shall be at the cost and expense of Licensee.

                                    LICENSOR:
                                    TIMESHARE SYSTEMS, (NC.

                                    By:_______________________________________
                                    Its:______________________________________

                                    LICENSEE:
                                    ADVANCED TELECOMMUNICATIONS, INC.

                                    By _______________________________________
                                    Its_______________________________________

                    EXHIBIT A TO ANTENNAE LICENSE AGREEMENT

                                   Equipment

Up to one (1) antenna as well as related base site cabinets and any
other appropriate ancillary equipment so long as it is contained within 100
square feet of roof space and does not exceed 10 feet in height. No additional
antennae may be installed without Landlord's written consent.

                                      B-2

<PAGE>

                                    EXHIBIT C
                                LICENSE AGREEMENT
                          MINNEAPOLIS TECHNOLOGY CENTER
                          WEST PARKING LOT (UNASSIGNED)

     This License Agreement is made as of the 3rd day of March, 1999, by and
between TIMESHARE SYSTEMS, INC., a Minnesota corporation ("Licensor") and
ADVANCED TELECOMMUNICATIONS, INC. ("Licensee"),

     In consideration of the covenants and agreements contained herein, and
other good and valuable consideration, receipt and sufficiency of which is
acknowledged, Licensor and licensee mutually agree as follows:

     A GRANT: Licensor hereby grants to Licensee, for the sole purpose of
parking the automobile(s) described in Licensee's application attached hereto,
_________(___) unassigned parking space(s) in the restricted parking areas of
the West parking lot ("Lot") located at Minneapolis Technology Center, 511 South
Eleventh Avenue South, Minneapolis, Minnesota.

     2 TERM: Thee term of this license commences this date and expires at
midnight April 30, 2099.

     3. LICENSE FEE: Licensee shall pay as its fee for this License the sum of
$95 per admittance card on or before the first day of each month to Timeshare
Systems, Inc., 511 South Eleventh Avenue South, Minneapolis, Minnesota, 55415,
or at such other address that Licensor may designate; together with any use,
sales or other tax (excepting income tax) payable or which may become payable by
Licensor as a result of said fee. In the event the term of this License
commences on other than the first day of a month, the fee will be prorated for
such month. The license fee shall commence on the date Licensor delivers a Lot
gate operator(s) or admittance card(s) to Licensee. The license fee shall
terminate on the expiration date of the license or on the date the Licensee
returns the Lot gate operator(s) and/or admittance card(s) whichever occurs
last. The fee for this License may be adjusted from time to time beginnung
January 1, 2000 to whatever fee Licensor is then charging for Lot parking
stalls; provided that Licensor shall give thirty (30) days prior written notice
of any such increase and Licensee may, within thirty (30) days subsequent to any
such increase, terminate this License by giving ten (10) days written notice to
Licensor.

     4. NEGATIVE COVENANTS: Licensee shall not:

     a) Park more than one (1) standard sized (or smaller) automobile per
admittance card in the Lot, at any one time.

     b) Allow any non-authorized automobile to be parked in the Lot through use
of Licensee's issued admittance card.

     c) Allow any automobile to be stored overnight in the Lot.

     Upon breach of any covenant set forth in this Paragraph 4 by Licensee,
Licensor may, at its option, and in addition to Licensor's remedies provided in
paragraph 5 hereof, charge Licensee the sum of $25.00 for each day of any such
violation, and/or may tow or have towed any automobile which is parked in
violation of any covenant set forth in this paragraph 4, and in such case
Licensee agrees to pay Licensor as an additional license fee hereunder all
towing and storage costs associated with said towing.

     5. RIGHT OF RE-ENTRY AND EXPIRATION: Licensee agrees that this License is
made upon the condition that if the Licensee shall fail to pay the license fee
within ten (10) days of when due, fail to keep any term or condition of this
license, or shall neglect or fail to keep, observe and perform any of the rules
and regulations from time to time adopted and promulgated by Licensor for the
operation of the Lot, then in any of said cases the Licensor may immediately or
at any time thereafter and without notice or demand, retake possession of the
parking stall(s), without such re-taking working a forfeiture of the license fee
to be paid by Licensee for the full tern of this License. In the event of such
retaking or at the end of the Term, Licensee agrees to return to Licensor any
and all Lot gate opentor(s) and/or admittance cards, upon notice from Licensor.
Licensee shall pay to Licensor, Licensor's replacement/lost fee fur all such
operator(s) and/or admittance cards not returned.

     6. PARKING LOT OPERATION: It is specifically understood and agreed that the
Lot area is operated without constant staffing and that Licensor shall not be
responsible for any loss, damage or casualty sustained by Licensee's automobile
or for the loss of any articles, personal property or any such other items from
Licensee's automobile.

     7. OFFICE LEASE: Licensee presently has (or is contemporaneously executing)
a lease for office space within the Minneapolis Technology Center ("Office
Lease").

     a) A termination of the Office Lease, whether by expiration of the term or
otherwise, shall automatically constitute a termination of this License
Agreement.

     8. AUTHORIZED VEHICLES: Licensee agrees, upon request from Licensor, to
furnish Licensor or its authorized agent, the state automobile license number(s)
assigned to those automobile(s) of those persons employed on the premises and
who are designated by Licensee to use the Lot. Any such designation shall not
exceed the number of stalls licensed hereunder. If any automobile of Licensee or
of Licensee's officers, agents or employees who is not designated to park in the
Lot is parked therein, then Licensee shall pay to Licensor an amount equal to
$25 per day for each such vehicle for each day, or a part thereof, such amount
to be due and payable by Licensce within three (3) days after demand therefor.

     9. CANCELLATION: Licensor shall leave the right, upon thirty (30) days
prior written notice to Licensee, to cancel this License Agreement and allow the
Parking Lot to be used on an unrestricted basis for all tenants and their
invitees. Licensee front and after the cancellation date specified in such
written notice, shall have no further obligation for the payment of the fee
hereunder but the use of such Parking Lot shall be subject to the terms of
paragraphs 4(c) 6 and 7 hereof.

     10. LICENSE HOURS: Notwithstanding anything else contained herein to the
contrary, the license granted hereunder shall be limited to the following hours:
Monday through Friday (legal holidays specifically excluded) from 7:00 a.m. to
6:00 p.m. Licensee specifically agrees that should Licensee violate the
foregoing hours during a time period in which there is an event ("Event") at the
Hubert H. Humphrey Metrodome (located across 11th Avenue from the Minneapolis
Technology Center) licensee shall pay to Licensor $25.00 for each such Event
violation (or such higher rate which Licensor may then be charging for dome
Event parking).

(LICENSEE)                                    (LICENSOR)
ADVANCED TELECOMMUNICATIONS. INC.             TIMESHARE SYSTEMS, INC.
By________________________________            By:______________________________
Its:______________________________            Its:_____________________________

Date:_____________________________            Date:____________________________

<PAGE>
                                    EXHIBIT D

                              RULES AND REGULATIONS

     1. No sign, placard, picture, advertisement, name or notice shall be
installed or displayed on any part of the outside or inside of the Building
without the prior written consent of the Landlord. Landlord shall have the right
to remove, at Tenant's expense and without notice, any sign installed or
displayed in violation of this rule. All approved signs or lettering on doors
and walls shall be printed, painted, affixed or inscribed at the expense of
Tenant by a person or vendor chosen by Landlord. In addition, Landlord
reserves the right to change from time to time the format of the signs or
lettering and to require previously approved signs or lettering to be
appropriately altered.

     2. If Landlord objects in writing to any curtains, blinds, shades or
screens attached to or hung in or used in connection with any window or door of
the Premises, Tenant shall immediately discontinue such use. No awning shall be
permitted on any part of the Premises. Tenant shall not place anything or allow
anything to be placed against or near any glass partitions or doors or windows
which may appear unsightly, in the opinion of Landlord, from outside the
Premises.

     3. Tenant shall not obstruct any sidewalks, halls, passages, exits,
entrances, elevators, escalators or stairways of the Building. The halls,
passages, exits, entrances, shopping malls, elevators, escalators and stairways
are not for the general public, and Landlord shall in all cases retain the right
to control and prevent access to the Building of all persons whose presence in
the judgment of Landlord would be prejudicial to the safety, character,
reputation and interests of the Building and its tenants provided that nothing
contained in this rule shall be construed to prevent such access to persons
with whom any tenant normally deals in the ordinary course of its business,
unless such persons are engaged in illegal activities. No tenant and no employee
or invitee of any tenant shall go upon the roof of the Building.

     4. The directory of the Building will be provided exclusively for the
display of the name and location of tenants only and Landlord reserves the right
to exclude any other names therefrom.

     5. Tenant shall not cause any unnecessary labor by carelessness or
indifference to the good order and cleanliness of the Premises. Landlord shall
not in any way be responsible to any Tenant for any loss of property on the
Premises, however occurring, or for any damage to any Tenant's property by the
janitor or any other employee or any other person.

     6. Landlord  will furnish  Tenant free of charge with two keys to each door
in the Premises.  Landlord may make a reasonable charge for any additional keys,
and Tenant  shall not make or have made  additional  keys,  and Tenant shall not
alter any lock or  install a new or  additional  lock or bolt on any door of its
Premises. Tenant, upon the termination of its tenancy, shall deliver to Landlord
the keys of all doors which have been  furnished to Tenant,  and in the event of
loss of any keys so furnished, shall pay Landlord therefor.

     7. It Tenant requires telegraphic, telephonic, burglar alarm or similar
services, it shall first obtain, and comply with, Landlord's instructions in
their installation.

     8. No equipment, materials furniture, packages, supplies, merchandise or
other property will be received in the Building or carried in the elevators
except between such hours and in such elevators as may be designated by
Landlord.

     9. Tenant shall obtain Landlord's consent prior to placing a load upon any
floor which may exceed the load per square foot which such floor was designed to
carry and which is allowed by law. Landlord shall have the right to prescribe
the weight, size and position to all equipment, materials, furniture or other
property brought into the Building. Heavy objects shall stand on such platforms
as determined by Landlord to be necessary to properly distribute the weight.
Business machines and mechanical equipment belonging to Tenant which cause noise
or vibration that my be transmitted to the structure of the Building or to any
space in the Building to such a degree as to be objectionable to Landlord or to
any tenant shall be placed and maintained by Tenant, at Tenant's expense on
vibration eliminators or other devices sufficient to eliminate noise or
vibration. The persons employed to move such equipment in or out of the Building
must be acceptable to Landlord. Landlord will not be responsible for loss of, or
damage to, any such equipment or other property from any cause, and all damage
done to the Building by maintaining or moving such equipment or other property
shall be repaired at the expense of Tenant.

     10. Tenant shall not waste electricity, water or air conditioning. Tenant
shall keep corridor doors closed.

     11. Landlord reserves the right to exclude from the Building between the
hours of 6 p.m. and 7 a.m. the following day, or such other hours as may be
established from time to time by Landlord, and on Sundays and legal holidays any
person unless that person is known to the person or employee in charge of the
Building as being an employee of Tenant and has a pass or is properly
identified. Tenant shall be responsible for all persons for whom it requests
passes and shall be liable to Landlord for all acts of such persons. Landlord
shall not be liable for damages for any error with regard to the admission to or
exclusion from the Building of any person.

     12. Tenant shall close and lock the doors of its Premises and entirely shut
off all water faucets or other water apparatus and electricity, gas or air
outlets before Tenant and its employees leave the Premises. Tenant shall be
responsible for any damage or injuries sustained by other tenants or occupants
of the Building or by Landlord for noncompliance with this rule.

     13. The toilet rooms, toilets, urinals wash bowls and other apparatus shall
not be used for any purpose other than that for which they were constructed, no
foreign substance of any kind whatsoever shall be thrown into any of them, and
the expense of any breakage, stoppage or damage resulting from the violation of
this rule shall be borne by the Tenant who, or whose employees or invitees,
shall have caused it.

     14. Tenant shall not install any radio or television antenna, satellite
dish, loudspeaker or other device on the roof or exterior walls of the Building
except by virtue of a separate license negotiated with Landlord. Tenant shall
not interfere with radio or television broadcasting or reception from or in the
Building or elsewhere.

     15. Except as approved by Landlord, Tenant shall not mark, drive nails,
screw or drill into the partitions, woodwork or plaster or in any way deface the
Premises. Tenant shall not cut or bore holes for wires. Tenant shall not affix
any floor covering to the floor of the Premises in any manner except as approved
by Landlord. Tenant shall repair any damage resulting from noncompliance with
this rule.

     16.No animals are allowed in the Building with the exception of seeing-eye
or hearing animals. In the event any injuries are caused to Tenant's employees
or invitees, the owner of said animal agrees to indemnify and hold the Landlord
and its managing agent and all other tenants harmless from all costs (including
reasonable attorneys' fees) with respect to the presence of any animals in the
Building.

     17. Tenant shall store all its trash and garbage within its Premises.
Tenant shall not place in any trash box or receptacle any material which cannot
be disposed of in the ordinary and customary manner of trash and garbage
disposal. All garbage and refuse disposal shall be made in accordance with
directions issued from time to time by Landlord.

     18. No cooking shall be done or permitted by any Tenant on the Premises,
except by the Tenant of Underwriters' Laboratory approved microwave oven or
equipment for brewing coffee, tea, hot chocolate and similar beverages shall be
permitted provided that such equipment and use is in accordance with all
applicable federal, state and city laws, codes, ordinances, rules and
regulations.

     19. Tenant shall not use in any space or in the public halls of the
Building any hand trucks except those equipped with the rubber tires and side
guards or such other material-handling equipment as Landlord may approve. Tenant
shall not bring any other vehicles of any kind into the Building.

     20. Tenant shall not use the name of the Building in connection with or in
promoting or advertising the business of Tenant except as Tenant's address.

     21. The requirements of Tenant will be attended to only upon appropriate
application to the office of the Building by an authorized individual. Employees
of Landlord shall not perform any work or do anything outside of their regular
duties unless under special instruction from Landlord, and no employee of
Landlord will admit any person (Tenant or otherwise) to any office without
specific instructions from

                                      D-1
<PAGE>

     22. Parking is allowed between the hours of 7:00 a.m. to 6:00 p.m., Monday
through Friday, holidays excepted, in the east parking lot only, subject to
availability and at such rates as Landlord is then charging. Notwithstanding
the foregoing, no parking is allowed during professional sporting events and/or
other events occurring at the Hubert H. Humphrey Metrodome located at across
11th Avenue South from the Building. All visitors to the Building parking in
such parking lot shall pay the then prevailing parking charges. Any visitor
drop-offs are allowed only on the east side of the Building. Notwithstanding the
foregoing, parking by Tenant pursuant to a specific license agreement shall be
24 hours per day, 7 days a week.

     23. Landlord may waive any one or more of these Rules and Regulations fur
the benefit of any particular tenant or tenants, but no such waiver by Landlord
shall be construed as a waiver of such Rules and Regulations in favor of any
other tenant or tenants, nor prevent Landlord from thereafter enforcing any such
Rules end Regulations against any or all of the tenants of the Building. The
foregoing shall not be construed to allow Landlord to discriminatorily enforce
these Rules and Regulations as against Tenant and not other tenants of the
Building.

     24. These Rules and Regulations are in addition to, and shall not be
construed to in any way modify or amend, in whole or in part, the terms,
covenants, agreements and conditions of any lease of premises in the Building.

     25. Landlord reserves the right to make such other and reasonable rules and
regulations as in its judgment may from time to time be needed for safety and
security, for care and cleanliness of the Building and for the preservation of
good order in and about the Building. Tenant agrees to abide by all such rules
and regulations in this Exhibit stated and any additional rules and regulations
which are adopted.

     26. Tenant shall be responsible for the observance of all of the foregoing
rules by Tenant's employees, agents, clients, customers, invitees and guests.

                                      D-2

<PAGE>

                                   EXHIBIT E

                    LICENSE AGREEMENT TO USE BUILDING CHILLER

     This License Agreement (the "Agreement"), entered into as of the 3rd day of
March, 1999, is between TIMESHARE SYSTEMS, INC., a Minnesota corporation (the
"Licensor"), having an address at 511 Eleventh Avenue South, Minneapolis,
Minnesota 55415 and Advanced Telecommunications Inc. (the "Licensee"), having an
address at Suite 409, 511 Eleventh Avenue South, Minneapolis, Minnesota 55415
(the "Premises"), with a notice address at 730 2nd Avenue South, Suite
1200, Minneapolis, MN 55402.

     1. Licensor agrees to permit Licensee to utilize for purposes provided
herein one of the chiller systems (as designated by Licensor) together with
associated plumbing and electrical and mechanical controls (the "Chiller"),
which are located on and at the building ("Building") in which the Premises are
located. This license shall be subject to automatic termination in the event
Licensee's lease for the Premises dated March 3rd, 1999 ("Lease") is
terminated or canceled, but otherwise the term of this Agreement shall be the
same as the Lease. Upon termination of Licensee's Lease for any reason, this
License Agreement and the license created hereby shall automatically expire with
said termination. The termination, cancellation or expiration of this License
Agreement shall not be cause or grounds for the cancellation or termination of
Licensee's Lease.

     2. Licensee may use the Chiller for purposes of cooling Licensee's
telecommunication and other related equipment ("Equipment"). Licensee
acknowledges that the license to utilize the Chiller is non-exclusive. This
Agreement and the license granted hereby is specifically limited to Licensee's
utilization of not more than 50 tons of the Chiller's capacity. Licensor, from
time to time may provide such 50 tons of cooling capacity by any one of the
Building's chillers, but the fees and other obligations hereunder shall continue
to be applicable nonetheless.

     3. Licensor agrees that Licensee may run utility lines (the "Cables")
between the Chiller and the Premises. Any damages to the Building or fixtures or
equipment located upon or within the Building resulting therefrom shall be
promptly repaired by Licensee.

     4. The Chiller shall remain the property of Licensor and any improvements
made to the Chiller shall likewise become the property of Licensor. Licensee
acknowledges that Licensor makes no representations or warranties as to the
condition, fitness or purpose for which Licensee intends to use the Chiller.
Licensee acknowledges and agrees that its use of the Chiller shall be in its
current "AS-IS" condition. This License shall extend to any maintenance or
improvements Licensee may desire and need to make to the Chiller, providing
however, Licensee shall use a contractor authorized and approved by Licensor
("Authorized Contractor") and Licensee obtains Licensor's prior written consent.
No work or maintenance shall be performed on the Chiller except by an Authorized
Contractor, nor without the express written consent of Licensor.

     5. For purposes of this License Agreement Licensee's "Pro Rata Share" shall
be equal to 20.8% and assumes the Chiller to which Licensee shall be connected
shall have an approximately 240 rated capacity. If the Chiller to which Licensee
has a different rated capacity, then Licensee's Pro Rata Share shall be adjusted
accordingly.

     6. Licensee shall bear all expenses in connection with its use and
maintenance of the Chiller, including: i) Licensee's Pro Rata Share of periodic
maintenance costs (no less frequently than quarterly plus an annual preventative
maintenance inspection by an Authorized Contractor) for the Chiller, including
any repairs, wherever or not such repairs involve what may be typically
considered capital items, but not including capital improvements or similar
capital additions; ii) the "User Fee" (as defined in paragraph 7 below); and iv)
the "Utility Fee" (as defined in paragraph 8 below). The foregoing maintenance
costs shall specifically include any up-grades and/or capital costs required or
mandated by any governmental authority, law, rule or regulation.

     7. Licensee shall pay to Licensor a monthly "User Fee" to compensate
Licensor for a share of the supervision costs for approximately one (1) hour
daily by the Building's facility maintenance person for daily logging,
adjusting, switching and for maintaining the cooling tower water and other costs
associated with the use, capital investment and operation of the Chiller. The
User Fee shall be Licensee's Pro Rata Share of such costs (said costs initially
being $5,400 and Licensee's initial Pro Rata Share shall initially be $1123 per
month), but said User Fee shall be adjusted upward in the amount of 3% annually,
on each anniversary date of this Agreement. Licensee acknowledges the
costs to connect the Premises to the Chiller shall be borne by Licensee and are
not part of any of the fees referred to elsewhere in this License Agreement. The
User Fee shall not commence until the Premises are actually connected to the
Chiller and being utilized (the "Effective Date").

Effective 7/1/99:

     8. Commencing with the Effective Date, Licensee agrees to pay to Licensor
at the rate of $1950 per month ("Utility Fee"), which represents Licensee's Pro
Rata Share of Licensor's electrical utility usage of approximately $9375 per
month for electrical consumption by the Chiller, cooling tower, cooling tower
pumps, etc., such Utility Fee to be prorated for any partial calendar month, and
to be adjusted after each calendar year (up or down) at the same average rate as
Landlord's average electrical rates change from year to year. In the event,
whether through more efficient equipment upgrades, changes in electrical rates
or otherwise, it can be shown that the overall utility costs to operate the
Chiller differs from the estimated $9375 per month ("Adjusted Utility Costs"),
then Tenant's Utility Fee shall be adjusted to its Pro Rata Share of the
Adjusted Utility Costs. Landlord shall provide to Tenant all reports and other
back-up supporting any adjustments to the Utility Fee.

Effective 7/1/99:

     9. Prior to the Effective Date Licensee agrees to pay to Licensor a one
time "Start-Up Fee" of $10,000, representing a portion of the "upgrade/start-up"
and accessory costs which were necessary to put the Chiller into operational
condition ("Start Up Costs").

     10. Licensee's contractor shall maintain in force during the term of this
License Agreement comprehensive liability insurance in amounts and in such form
as reasonably satisfactory to Licensor, protecting Licensor against any
liability, damages, cost or expenses, in construction with the maintenance and
alteration of the Chiller and Cables and shall supply the appropriate
certificates of such insurance upon request.

     11. Licensee and its contractors shall comply with all applicable federal,
state and local laws, regulations, and building codes in connection with the
use, maintenance and alteration of the Chiller and Cables. In the event any such
laws, regulations, or codes requires physical improvements be made to the
Building or other expenditures by or on behalf of the Building and/or its owner,
the costs of the same shall be borne by Licensee. Notwithstanding the foregoing,
any physical improvements, whether required by law, regulation, code or
otherwise, shall be subject to Licensor's approval, which approval may be given
or denied in Licensor's sole discretion. If any law, regulation or code
prohibits or disallows the Chiller and/or Cables or the effective use of the
license granted hereby, whether now or in the future, Licensor shall be entitled
to terminate the license granted hereby, without penalty; and Licensee shall
take such action so as to allow the Building to again be in compliance with such
law, regulation or code, including, if neccesary, the removal of Cables;
provided however, Licensor agrees to cooperate, without cost to Licensor, with
Licensee's efforts to comply with such laws, regulation or codes, including any
legal challenges thereto. Licensee shall have the right to challenge, at
Licensee's sole cost, any governmental requirement imposed or sought to be
imposed with respect to the Chiller during the term of this Agreement and in
connection therewith, to delay compliance with such requirements until
resolution of the contest or challenge; provided that neither Licensor nor the
Building is subject to the risk of any fine, penalty, cost, lien or forfeiture
during such contest.

     12. Licensor agrees to permit Licensee reasonable access to the Chiller and
other areas so as to facilitate the use, maintenance and alterations of the
Chiller and Cables. Licensee shall indemnify and hold Licensor harmless from and
against liability, damages, costs and expenses, including reasonable attorneys'
fees incurred by Licensor, arising out of Licensee's use, maintenance and
alterations of the Chiller and Cables, except if due to the negligence or
willful misconduct of Licensor. This obligation shall survive the expiration,
cancellation or termination of this License Agreement and the license created
hereunder.

     13. Any notice required or desired under this License Agreement shall be
deemed sufficiently given if given in compliance with the Licensee's Lease.

     14. In the event of default by either Licensor or Licensee of any of the
terms and conditions set forth in this License Agreement, whether suit be
commenced or not, the defaulting party agrees to pay the reasonable attorneys
fees, costs and expenses of the non-defaulting party incurred in enforcing or
attempting to enforce this License Agreement.

     15. If the Licensor is in default of any of its obligation to provide
services or maintain the Chiller as specified in this Agreement, Licensee shall
notify Licensor that Licensee is dissatisfied with the services and/or
maintenance so to be provided and, if following such notice, the same shall not
have been cured to Licensee's reasonable satisfaction within thirty (30) days of
such notice, then Licensee shall have the right to assume on the expiration of
such 30 day period the obligation to so provide the services and/or maintenance.
During the period that Licensee is performing Licensor's obligations, Licensee
shall be entitled to a credit against the User Fee otherwise due hereunder equal
to the actual cost of such service and/or maintenance.

                                       E-1

<PAGE>

     16. Licensor's right to assign this License Agreement is and shall remain
unqualified upon any sale or transfer of the Building and provided the purchaser
succeeds to the interests of Licensor and assumes all obligations of Licensor
hereunder, Licensor shall thereupon be entirely free of all obligations of the
Licensor hereunder and shall not be subject to any liability resulting from any
act or omission or event occurring after such conveyance.

(LICENSEE)                                 (LICENSOR)
ADVANCED TELECOMMUNICATIONS INC.           TIMESHARE SYSTEMS, INC.

By  [ILLEGIBLE]                            By      [ILLEGIBLE]
  ------------------------------------       -----------------------------------
  Its                                       Its
     ---------------------------------          --------------------------------
Date   [ILLEGIBLE]                          Date    8/1/99
     ---------------------------------           -------------------------------

                                      E-2

<PAGE>

Memorandum

To: Richard Smith, Cliff Williams, Mike Donahue

CC:

From: Lynne Powers

Date: 04/03/99

Re:   511 Building Lease

Please find the attached summary of the 511 Building lease. Both parties have
executed the lease, however the landlord returned the contract without signing
an attached license agreement. This was an oversight on his part and once I
obtain his signature I will forward the original to Mr. Donahue and a copy will
be placed in my files and Mr. Smith's.

I believe I have summarized the most important provisions of the contract on the
attached documents. However, if you wish to read the entire lease agreement
before I have the final signature, please let me know.

<PAGE>

Contract Summary:

511 Building Lease

Lessee:                       Advanced Telecommunications, Inc.
                              730 Second Avenue South
                              Suite 1200
                              Minneapolis, MN 55441

Lessor:                       Timeshare Systems, Inc.
                              511 Eleventh Avenue South
                              Minneapolis, MN 55415

Contract Negotiator:          Lynne Powers, Director of Financial Analysis

Contract Approver:            Richard Smith, Chief Financial Officer

Contact with Lessor Company:  Bassant Kharbanda, 651-481-9999, 612-332-2071

Purpose of Lease:
Rental of 6,300 square feet of building space for operation of Minneapolis
telephone switching equipment.

Base Rent per square foot:    $17.50, Year 1 rising $1 per square foot every
                              2 years

Commencement of Lease:        4/15/1999

Term:                         10 Years

End of Initial Term:          4/15/2009

Renewable for 2 Five(5) year periods
End of 1st Renewable Term:    4/15/2014

End of 2nd Renewable Term:    4/15/2019

Early Termination:            Lease may be terminated as of the end of the 60th
                              or 84th month if written notice given and payment
                              of  termination fee equal to 6 months rent.

Other Terms:
1) ATI is responsible for leasehold improvements and landlord will need to
   approve construction plans prior to commencement.
2) "Real Estate Tax Base" of $1.11 per square feet and "Operating Expense
   Base" of $3.84 per square foot are included in the base rent. Commencing with
   the first full calendar year, ATI will pay Landlord actual taxes and
   operating expenses to the extent they exceed the base.
3) ATI will have submetered utilities and is responsible for those costs
   directly to the utility companies.
4) Lease costs include an additional 15% of square footage on top of the actual
   square footage for use of common areas.
5) ATI has right of first refusal when adjoining lease space becomes
   available.
6) ATI will have access to the Landlord's generator and UPS system at no
   additional cost over the base lease cost.
7) Lease includes 100 square feet of roof space for location of
   antennae.
8) ATI will pay $95 per month per building access card, which includes
   access to parking lot.
9) ATI will have license to use of building chiller for a monthly user fee of
   $1123 and a utility fee of $1950 per month. There is also a "Start-up Fee" of
   $10,000. These fees will commence on 7-1-99.

<PAGE>

<TABLE>
<CAPTION>

                             511 Building Lease Cost

                                                              1            2           3            4            5            6
Anniversary                                    1999         2000         2001         2002         2003         2004         2005
Year
---------                                      ----         ----         ----         ----         ----         ----         ----
<S>                                           <C>           <C>          <C>          <C>          <C>         <C>          <C>
Square Feet                                   6,300         6,300        6,300        6,300        6,300        6,300        6,300
Common Space Multiplier                       x1.15         x1.15        x1.15        x1.15        x1.15        x1.15        x1.15
                                              -----         -----        -----        -----        -----        -----        -----
Total Square Feet                             7,245         7,245        7,245        7,245        7,245        7,245        7,245

Base Rent per Sq Ft till 4/15                         $     17.50  $     17.50  $     16.50  $     18.50  $     19.50  $     19.50
Base Rent per Sq. Ft.                   $     17.50   $     17.50  $     18.50  $     18.50  $     19.50  $     19.50  $     20.50
Annual Base Rent 1/1 - 4/15                      --   $126,787.50  $126,787.50  $134,032.50  $134,032.50  $141,277.50  $141,277.50
Annual Base Rent 4/15 - 12/31           $126,787.50   $126,787.50  $134,032.50  $134,032.50  $141,277.50  $141,277.50  $148,522.50

Monthly Base Rent 1/1 - 4/15            $        --   $ 10,565.63  $ 10,565.63  $ 11,169.38  $ 11,169.38  $ 11,773.13  $ 11,773.13
Monthly Base Rent 4/15 - 12/31          $ 10,565.03   $ 10,565.63  $ 11,169.38  $ 11,169.38  $ 11,773.13  $ 11,776.88  $ 12,376.88

Access Card Fees  (5)                     $   475.00   $   475.00   $   475.00   $   475.00   $   475.00   $   475.00   $   475.00

Chiller Fees (eff. Date 7/1/99) 1/1-4/15
Maintenance & Use                         $      --    $ 1,123.00   $ 1,156.69   $ 1,191.39   $ 1,227.13   $ 1,263.95   $ 1,301.86
Utility Fee                               $      --    $ 1,950.00   $ 1,950.00   $ 1,950.00   $ 1,950.00   $ 1,950.00   $ 1,950.00

Chiller Fees (eff. Date: 7/1/99)
4/15 - 12/31
Maintenance & Use                         $ 1,123.00   $ 1,156.69   $ 1,191.39   $ 1,227.13   $ 1,263.95   $ 1,301.86   $ 1,340.92
Utility Fee                               $ 1,950.00   $ 1,950.00   $ 1,950.00   $ 1,950.00   $ 1,950.00   $ 1,950.00   $ 1,950.00

Monthly Payment w/ Chiller 1/1-4/15       $       --   $14,113.63   $14,147.32   $14,785.77   $14,821.51   $15,462.07   $15,499.99

Monthly Payment w/ Chiller 4/15-12/31     $14,113.63   $14,147.32   $14,785.77   $14,821.51   $15,462.07   $15,499.99   $16,142.80

Jan                                       $       --   $14,113.63   $14,147.32   $14,785.77   $14,821.31   $15,462.07   $15,499.99
Feb                                       $       --   $14,113.63   $14,147.32   $14,785.77   $14,821.31   $15,462.07   $15,499.99
Mar                                       $       --   $14,113.63   $14,147.32   $14,785.77   $14,821.31   $15,462.07   $15,499.99
Apr                                       $ 5,520.31   $14,130.47   $14,466.54   $14,803.64   $15,141.79   $15,481.03   $15,821.39
May                                       $11,040.63   $14,147.32   $14,785.77   $14,821.51   $15,462.07   $15,449.99   $16,142.80
Jun                                       $11,040.63   $14,142.32   $14,785.77   $14,821.51   $15,462.07   $15,449.99   $16,142.80
Jul                                       $14,113.63   $14,147.32   $14,785.77   $14,821.51   $15,462.07   $15,449.99   $16,142.80
Aug                                       $14,113.63   $14,147.37   $14,785.77   $14,821.51   $15,462.07   $15,449.99   $16,142.80
Sep                                       $14,113.63   $14,147.32   $14,785.77   $14,821.51   $15,462.07   $15,449.99   $16,142.80
Oct                                       $14,113.63   $14,147.32   $14,785.77   $14,821.51   $15,462.07   $15,449.99   $16,142.80
Nov                                       $14,113.63   $14,147.32   $14,785.77   $14,821.51   $15,462.07   $15,449.99   $16,142.80
Dec                                       $14,113.63   $14,147.32   $14,785.77   $14,821.51   $15,462.07   $15,449.99   $16,142.80
                                          ----------   ----------   ----------   ----------   ----------   ----------   ----------
Total                                    $112,283.31  $169,649.87  $175,194.61  $177,732.99  $183,302.88  $185,867.16  $191,463.73
                                         ===========  ===========  ===========  ===========  ===========  ===========  ===========
Chiller Start-up Fees                    $ 10,000.00  $        --  $        --  $        --  $        --  $        --  $        --
                                         -----------  -----------  -----------  -----------  -----------  -----------  -----------
Grand Total                              $122,283.31  $169,649.87  $175,194.61  $177,732.99  $183,302.88  $185,867.16  $191,463.73
                                         ===========  ===========  ===========  ===========  ===========  ===========  ===========
</TABLE>

<TABLE>
<CAPTION>

                                               7             8           9            10
Anniversary                                   2006         2007         2008         2009
Year
---------                                     ----         ----         ----         ----
<S>                                          <C>          <C>          <C>          <C>
Square Feet                                   6,300        6,300        6,300        6,300
Common Space Multiplier                       x1.15        x1.15        x1.15        x1.15
                                        -----------  -----------  -----------  -----------
Total Square Feet                             7,245        7,245        7,245        7,245

Base Rent per Sq Ft till 4/15           $     20.50  $     20.50  $     21.50  $     21.50
Base Rent per Sq  Ft                    $     20.50  $     21.50  $     21.50  $     22.50
Annual Base Rent 1/1 - 4/15             $148,522.50  $148,522.50  $155,767.50  $155,767.50
Annual Base Rent 4/15 - 12/31           $148,522.50  $155,767.50  $155,767.50  $163,012.50

Monthly Base Rent 1/1 - 4/15            $ 12,376.88  $ 12,376.88  $ 12,980.63  $ 12,980.63
Monthly Base Rent 4/15 - 12/31          $ 12,376.88  $ 12,980.63  $ 12,980.63  $ 13,584.38

Access Card Fees  (5)                   $    475.00  $    475.00  $    475.00  $    475.00

Chiller Fees (eff. Date 7/1/99) 1/1 - 4/15
Maintenance & Use                       $  1,340.92  $  1,381.15  $  1,422.58  $  1,465.26
Utility Fee                             $  1,950.00  $  1,950.00  $  1,950.00  $  1,950.00

Chiller Fees (eff. Date: 7/1/99)
4/15 - 12/31
Maintenance & Use                       $  1,381.15  $  1,422.58  $  1,465.26  $  1,509.22
Utility Fee                             $  1,950.00  $  1,950.00  $  1,950.00  $  1,950.00

Monthly Payment w/ Chiller 1/1-4/15     $ 16,142.80  $ 16,183.02  $ 16,828.21  $ 16,870.89

Monthly Payment w/ Chiller 4/15-12/31   $ 16,183.02  $ 16,828.21  $ 16,870.89  $ 17,518.59

Jan.                                    $ 16,142.80  $ 16,183.02  $ 16,828.21  $ 16,870.89
Feb.                                    $ 16,142.80  $ 16,183.02  $ 16,828.21  $ 16,870.89
Mar.                                    $ 16,142.60  $ 16,183.02  $ 16,828.21  $ 16,870.89
Apr                                     $ 16,162.91  $ 16,505.62  $ 16,849.55  $ 17,194.74
May                                     $ 16,183.02  $ 16,828.21  $ 16,870.89  $ 17,518.59
Jun                                     $ 16,183.02  $ 16,828.21  $ 16,870.89  $ 17,518.59
Jul                                     $ 16,183.02  $ 16,828.21  $ 16,870.89  $ 17,518.59
Aug                                     $ 16,183.02  $ 16,828.21  $ 16,870.89  $ 17,518.59
Sep                                     $ 16,183.02  $ 16,828.21  $ 16,870.89  $ 17,518.59
Oct                                     $ 16,183.02  $ 16,828.21  $ 16,870.89  $ 17,518.59
Nov                                     $ 16,183.02  $ 16,828.21  $ 16,870.89  $ 17,518.59
Dec                                     $ 16,183.02  $ 16,828.21  $ 16,870.89  $ 17,518.59
                                        -----------  -----------  -----------  -----------
Total                                   $194,055.48  $199,680.35  $202,301.25  $207,956.14
                                        ===========  ===========  ===========  ===========
Chiller Start-up Fees                   $        --  $        --  $        --  $        --
                                        -----------  -----------  -----------  -----------
Grand Total                             $194,065.48  $199,680.35  $202,301.25  $207,956.14
                                        ===========  ===========  ===========  ===========

</TABLE>

<PAGE>

                     STANDARD OFFICE LEASE AGREEMENT (GROSS)

THIS LEASE AGREEMENT (hereinafter called the "Lease Agreement") made as of the
3rd day of March, 1999, by and between TIMESHARE SYSTEMS, INC., a Minnesota
corporation, having offices at 511 Eleventh Avenue South, Minneapolis,
Minnesota, 55415 (hereafter called the "Landlord"), and Advanced
Telecommunications, Inc., a ________________ corporation (hereafter called the
"Tenant").

                                   WITNESSETH

     FOR AND IN CONSIDERATION of the sum of One Dollar ($1.00) in hand paid by
each of the parties to the other, and other good and valuable consideration,
receipt and sufficiency of which is hereby acknowledged, Landlord does hereby
lease and let unto Tenant, and Tenant does hereby hire, lease and take from
Landlord, that area outlined in red on Exhibit A-1 attached hereto, and by this
reference incorporated herein, and described as 325, containing approximately
7061 rentable square feet, (hereafter called the "Premises") at 511 11th Avenue
South (hereafter called the "Building") in the City of Minneapolis, County of
Hennepin, State of Minnesota. The terms Building as it is used herein shall
consist of the land and building(s) set forth in Exhibit A-2 hereto. The
Premisesarea shall be measured from the outside of exterior or corridor walls
and from the center of demising walls to obtain the useable area of the Premise:
which shall be multiplied by a factor of 1.15 to active at the rentable area of
the Premises. The parties may measure the Premises at any time, but unless the
rentable area differs by more or less than 10% the rental amounts set forth
below shall not be adjusted.

 ARTICLE 1 - TERM
     A. To have and to hold said Premises for a term of ten (10) years,
commencing upon the earlier of: 1) April 15, 1999; or ii) the date on which
Tenant occupies any portion of the Premises for the conduct of its business; and
terminating on the last day of the month during which the tenth (10th)
anniversary of the commencement date occurs (hereafter called the "Term") upon
the rentals and subject to the conditions set forth in this Lease Agreement, and
the Exhibits attached hereto. The commencement and termination dates are
specifically subject to the provisions of Article 5 hereof.

     B. Tenant shall have the right to renew the Term of the Lease Agreement
for two (2) periods of five (5) years each ("Renewal Term(s)"), subject to the
following terms, covenants and conditions: i) Tenant shall not be in default
beyond any applicable grace period in the performance of any of the terms,
covenants or conditions of this Lease Agreement, either at the time of the
exercise of the right to renew or at the commencement of the applicable Renewal
Term; ii) the Renewal Terms) shall be on the same terms, covenants and
conditions as provided in this Lease Agreement, except the Minimum Rental during
the Renewal Term shall be at the rates as set forth in the table in Paragraph 3B
and there shall be no further renewal right after the commencement of the second
Renewal Term; and iii) Tenant shall exercise its right to renew by giving
written notice thereof to Landlord at least nine (9) calendar months prior to
the expiration of the initial Term or first Renewal Term, as the case may be,
time being of the essence. If Tenant fails to notify Landlord in the manner and
within the time as provided in this paragraph, Tenant's right to renew this
Lease Agreement shall expire and become null and void. If Tenant fails to
exercise the first Renewal Term, then the following Renewal Term shall also
terminate.

ARTICLE 2 - USE
     A. The Premises shall be used by the Tenant solely for the following
purposes: General office purposes, including executive corporate and general
offices; in addition Tenant shall be entitled, subject to obtaining such
approvals as may be required from any governmental authorities which may have
jurisdiction thereof, to install, operate and maintain telecommunications
equipment, including telecommunication switching operations and related
facilities utilized in connection with Tenant's telecommunication business. No
other use of the Premises shall be permitted or allowed.

     B. Landlord acknowledges that in connection with Tenant's use of the
Premises, it shall be installing specialized telecommunication equipment, and
various electrical equipment and facilities associated therewith
("Telecommunications Equipment"). Tenant shall be solely responsible for
ensuring that the Telecommunications Equipment can be operated consistent with
Landlord's current facilities and utilities and Tenant shall be solely
responsible for any special utility requirements created by the
Telecommunications Equipment (such as, but not limited to: all electrical power
utilized thereby, additional cooling requirements, uninterrupted power sources,
etc.) the installation of which shall be governed by Article 4 below. Tenant
shall also be solely responsible to ensure that any electrical/magnetic field
("EMF") is not emitted beyond the Premises at levels exceeding those acceptable
by the Food and Drug Administration for persons with pacemakers or other
electronic prosthetics (5 goss or 5,000 milligoss). In all events, Tenant shall
indemnify, defend with counsel of Landlord's selection, and save Landlord
harmless from any claim for injury to a person or damage to property asserted by
any person against Landlord, its agents or employees by reason of any EMF
emitted from or created by the Telecommunications Equipment. In addition, Tenant
hereby assumes all risk in connection with the presence of all EMF within the
Premises and hereby releases Landlord from any and all liability or
responsibility to Tenant, its agents, employees, contractors or anyone claiming
through or under Tenant by way of subrogation or otherwise for the loss or
damage to property or injury to persons arising out of or relating to EMF.

     C. Tenant and its "Affiliates" (as defined in Article 15 below) shall have
the right to provide telecommunication services to other tenants in the Building
on a non-exclusive basis with other providers of such services; provided all
such tenants shall be able to freely choose their telecommunications provider,
and Tenant shall not solicit such tenants (in person) except with Landlord's
prior approval.

ARTICLE 3 - RENTALS

     A. Tenant agrees to pay to Landlord as minimum rental (hereinafter called
"Minimum Rental") for the Premises, without notice set-off or demand, monthly
installments during the Term, and if properly exercised, each of the four
Renewal Terms, all as set forth in the table in Paragraph 3B below; said monthly
installments to be due and payable by Tenant in advance on the first day of each
calendar month during the Term of this Lease Agreement, or any extension or
renewal thereof, at the office of Landlord set forth in the preamble to this
Lease Agreement or at such other place as Landlord may designate. In the event
of any fractional calendar month, Tenant shall pay for each day in such partial
month a rental equal to l/30 of the Minimum Rental. Tenant agrees to pay, as
Additional Rent, which shall be collectible to the same extent as Minimum
Rental, all amounts which may become due to Landlord hereunder and any tax,
charge or fee that may be levied, assessed or imposed upon or measured by the
rents reserved hereunder by any governmental authority acting under any present
or future law before any fine, penalty, interest or costs may be added thereto
for non-payment. Notwithstanding anything contained herein to the contrary, upon
the execution by Tenant of this Lease Agreement, Tenant shall pay to Landlord
$10,297.30 which sum shall be applied toward the first monthly Minimum Rental.

                                      -1-

<PAGE>

          (iii) Tenant shall be entitled to install an UPS electrical system
and/or batteries all in a segregated area of the Premises along with the
Telecommunications Equipment ("Electrical Room").

          (iv) Tenant shall install for the Premises (including the Electrical
Room) an electric submeter for all electrical usage therein;

     2. installation of the following:

          (i) Tenant shall cause to be removed modular interior walls from
within the Premises, if there are any, and store the same inside the Premises
(or at such other storage location as designated by Landlord) until the
completion of Tenant's Work, at which time said removed modular interior walls
(together with any additional modular interior walls Landlord may have in
storage) shall be made available by Landlord to Tenant for installation of
offices and rooms (including the Electrical Room) utilizing Landlord's modular
walls, to the extent Tenant so desires;

          (ii) installation of floor covering and wall coverings pursuant to
Final Plans;

          (iii) extension of the demising walls above the ceiling to the deck of
the roof pursuant to Final Plans.

          (iv) installation of cabling and conduit from the Premises to
Tenant's telecommunication antennae and related equipment on the roof of the
Building (which placement, location and maintenance of such equipment shall be
governed by a separate license agreement in the form of Exhibit B attached
hereto and incorporated herein by reference). Tenant agrees that at no time
during the Term shall it use, license or otherwise agree to utilize any space
upon the Building or land upon which it is located for antennae space, except
pursuant to Exhibit B, and in no event shall it use, license, utilize or rent
space from other tenants or licensees of the Building without the consent of
Landlord, which consent may he conditioned upon payment of reasonable fees to
Landlord;

          (v) use of the Building's existing conduit and riser space and in the
event existing conduit is not available, the installation of conduit and cabling
from the Electric Room to Tenant's network outside of the Building. 1n
connection therewith Landlord shall cooperate with Tenant to locate and utilize
an appropriate riser space from the Premises to other necessary levels of the
Building, such cooperation may include core drilling (subject to Paragraph 4C
below). Tenant shall also have the right to construct dual telecommunication
conduit entrances to the Building (as reasonably approved by Landlord), which
may include the removal and replacement of curbing and/or sidewalks, and
trenching and repairing portions of the parking lot and/or other common areas,
all subject to Paragraph 4C below. Tenant agrees to cooperate and coordinate
with other tenants of the Building desiring or constructing such dual
telecommunication conduit entrances. Notwithstanding anything contained in this
Lease Agreement to the contrary, all cabling and conduit, located on the
exterior of the Premises shall become the property of Landlord upon the
expiration of the Term and shall be surrendered with the Premises.

     3. installation of the following heating, ventilation, air conditioning
systems, equipment or facilities ("HVAC"):

          (i) installation of such plumbing, cables, controls and accessory
equipment to connect the Electrical Room to the Building's chiller equipment
pursuant to the provisions of the license agreement set forth in Exhibit E
attached hereto and to which the parties hereby agree to be bound.

          (ii) such equipment to provide Tenant' necessary HVAC capacity to the
Premises, including but not limited to, condensers on the exterior of the
Building, or on the roof of the Building, at such location as approved by
Landlord ("Cooling Equipment"). If such Cooling Equipment is necessary, it shall
be subject to availability of space and Tenant shall pay for such space at the
same per square foot rate as is set forth in the table of Article 3.

          (iii) in connection with the Cooling Equipment or other forms of
cooling, such drains as Tenant deems necessary, subject to Paragraph 4C below.

          (iv) Tenant shall have the right to modify the Building's heating
system servicing the Premises, subject to Paragraph 4C below.

          (v) Tenant may modify the duct work and other modifications necessary
to the Building's HVAC so as to service the office portions of the Premises.

     4. subject to the prior approval of Landlord, which approval shall not be
unreasonably withheld or delayed, Tenant shall be entitled to reinforce the
floor load capacity of the Premises. Tenant shall be responsible for assuring
that its equipment and any of the Work performed within the Premises does not
exceed the floor capacities of the Building and/or Premises and Tenant shall
indemnify and hold Landlord harmless from all damage, liability and costs
(including reasonable attorneys' fees) in the event it over-loads the floor
capacity of the Premises, but only to the extent it exceeds 80 ppf live weight
and 20 ppf dead weight.

     5. Tenant shall have the right to modify the Building's sprinkler system
serving the Premises (including installation of a fire suppression system which
may be independent of the Building's system or have the system servicing the
Premises modified to a dry pipe system), pursuant to Final Plans to be approved
by Landlord.

     6. If Tenant desires to have the right to install an emergency generator
(the "Tenant Generator") either (at Landlord's election) in an enclosed pad on
the roof of the Building or at the exterior of the Building in a location
approved by Landlord, the same shall be subject to the following:

     a. Tenant shall first obtain such governmental approvals, authorizations
        and permits as are required to install and operate the Tenant
        Generator.

     b. All plans and specifications for the installation of the Tenant
        Generator and its connection to the Premises must be approved, in
        advance, by Landlord. The installation of the Tenant Generator shall be
        performed in a manner approved by Landlord. The Tenant Generator may
        consist of up to 350 KW diesel generator and up to a related 500 gallon
        fuel tank.

     c. Tenant shall pay the entire cost of installing the Tenant Generator,
        including any modifications to the generator area required to
        accommodate and screen the Tenant Generator.

                                      -3-

<PAGE>

     d. Tenant shall maintain the Tenant Generator and any related equipment,
        at its sole cost and expense, in good order and condition and will
        repair any damage to the Building and/or any other equipment caused by
        the Tenant Generator and/or its installation and/or removal. Landlord
        shall not be liable to Tenant or to any other person for any loss or
        damage to the Tenant Generator regardless of cause, other than the
        negligence or acts of Landlord, its agents or employees.

     e. Tenant shall have the right to install gas generator(s) in lieu of
        diesel. In either event: (i) any fuel tank shall he located above ground
        and within the frame of the generator, (ii) Tenant shall install such
        spill protection and other tank monitoring devices as shall be required
        by governmental codes and regulations, (iii) Tenant shall provide
        Landlord with copies of all warranties and evidence of any testing
        required by law, and (iv) Tenant shall indemnify Landlord from and
        against any and all costs and liability arising from a leak from such
        fuel tank, including, without limitation, any clean-up costs.

     f. Upon the termination of the Lease Agreement, Tenant will have the right
        to remove the Tenant Generator, provided, (i) the Tenant Generator is
        removed within five (5) days following the termination of the Lease
        Agreement, and (ii) Tenant shall repair all damage to the Building,
        landscaping and/or any other equipment caused by the removal of the
        Tenant Generator and shall restore the area to the condition as existing
        prior to such installation.

     g. The availability of appropriate exterior space, and Tenant shall pay for
        such space at the same per square foot rate as is set forth in the table
        of Article 3.

     C. All of Tenant's Work shall be performed in a good and workmanlike manner
using first grade and new materials and to the extent any of such Work involves
alteration or replacement of any existing equipment or facilities of the
Building, Tenant shall use a standard and grade equal to or better than such
existing equipment and facilities. To the extent any of Tenant's Work involves
areas outside the Premises ("Exterior Work"), Tenant ant its contractors shall
coordinate all such Work with Landlord and Landlord's Building Manager, on a
daily basis. All such Work, including the Exterior Work, shall he performed in a
manner so as to not unreasonably disturb or interfere with the operations of the
Building or other tenants of the Building, specifically, but not exclusively
including, the performance of all such Work which may involve loud and/or
irritating noises, vibrations, dust and/or odors after normal business hours (as
defined in Paragraph 7D below). In all events, whenever the Tenant's Work
involves the alteration and/or interference with any of the Building's systems,
including, but not limited to, electrical, water, HVAC, sprinkler, plumbing and
life/health/safely systems, Tenant shall indemnify and hold Landlord harmless
with respect to any interruption of such systems to other portions of the
Building and/or other tenants and the continued operational integrity of such
systems as a result of the Work. In all events, Tenant, at is sole cost and
expense, shall obtain all applicable governmental approvals with respect to the
installation or doing of all Work including the Exterior Work. Tenant shall
cause its contractors and subcontractors to utilize only those parking areas
designated by Landlord, and to the extent such use utilizes parking spaces,
Tenant shall utilize its parking licenses (as set forth in Paragraph 14D and
Exhibit C below) for such purposes and Tenant shall be responsible for the
license fees due thereunder during such parking use by Tenant's contractors and
subcontractors. Landlord agrees to cooperate, at no cost to it, with respect to
the obtaining of any such governmental approvals, such cooperation, however,
shall not extend to providing any concessions to the governmental authority with
respect to zoning, parking or outer restrictions relating to the Building.

     D. Landlord agrees to make such alterations to the common area restroom
facilities on the first floor as necessary so as to put them in compliance with
Title lI1 of the Americans with Disabilities Act of 1990 ("ADA"). Tenant shall
perform its Work so as to be in compliance with the ADA.

 ARTICLE 5 - POSSESSION
     A. Tenant shall have access and possession to the Premises pursuant to
Article 4 above. Construction delays affecting Tenant's Work due to material
shortages, strikes, or acts of God, or otherwise shall in no event postpone the
date of commencement of the Term of this Lease Agreement nor of the payment of
rentals. By occupying the Premises as a Tenant, or to install fixtures,
facilities or equipment, or to perform the Work, Tenant shall be conclusively
deemed to have accepted the same, except for any latent defects affecting the
Building. Immediately after Tenant's completion of its Work, Landlord and
Tenant shall execute a ratification agreement which shall set forth the final
commencement and termination dates for the Terms and shall acknowledge the
Minimum Rental, the square footage of the Premises, and Delivery of the Premises
in the condition required by this Lease Agreement.

ARTICLE 6 - TENANT'S PRO RATA SHARE OF REAL ESTATE TAXES AND OPERATING EXPENSES
            ABOVE BASE
     A. Commencing with the first full calendar year subsequent to the
commencement of the Term, during each full or partial calendar year during the
Term of this Lease Agreement. Tenant shall pay to Landlord, as Additional
Rental, the amounts by which actual Real Estate Taxes and Operating Expenses
(both as hereafter defined) per square foot of rentable area in the Building
multiplied by the: number of square feet of reusable area in the Premises
exceed the Real Estate Tax Base and the Operating Expense Base, respectively
(both as hereafter defined) prorated for the period that Tenant occupied the
Premises. In the event that during all or any portion of any calendar year, the
Building is not fully rented and occupied Landlord may make any appropriate
adjustment in occupancy-related Operating Expenses for such year for the purpose
of avoiding distortion of the amount of such Operating Expenses to he attributed
to Tenant by reason of variation in total occupancy of the Building by
employing sound accounting and management principles to determine Operating
Expenses that would have been paid or incurred by Landlord had the Building
been 100% rented and occupied, and the amount so determined shall he deemed to
have been Operating Expenses for such year. As used herein, the "Real Estate Tax
Base" shall be $1.11 per rentable square foot times the rentable square feet
contained within the Premises, and the "Operating Expense Base" shall be $3.8.1
per rentable square feet times the rentable square feet contained within the
Premises. If the actual Real Estate Taxes or Operating Expenses per square foot
times the rentable square feet contained within the Premises are less than the
Real Estate Tax Base or Operating Expense Base, respectively. Tenant shall not
be entitled to any refund or credit.

     B. Commencing with the first full calendar year subsequent to the:
commencement of the Term, Landlord shall, each year during the Term of this
Lease Agreement, give Tenant an estimate of Operating Expenses and an estimate
of Real Estate Taxes payable per square feet of rentable area for the coming
calendar year. If either such estimate exceeds the respective Real Estate Tax
Base or Operating Expense Base (as defined above), Tenant shall pay, as
Additional Rental, along with its monthly Minimum Rental payments required
hereunder, one-twelfth (1/12) of such excess estimated Operating Expenses and/or
Real Estate Taxes and such Additional Rental shall be payable until subsequently
adjusted for the following year pursuant to this Article

     C. As soon as possible after the expiration of each calendar year
beginning with the first full calendar your subsequent to the commencement of
the Term but in any event no later than ninety (90) days following the close of
the calendar year, Landlord shall determine and certify to Tenant the actual
Operating Expenses and Real Estate Taxes for the previous year per square foot
of rentable area in the Building and the amount applicable to the Premises. If
such statement shows that Tenant's share of increases in Operating Expenses and
Real Estate Taxes over Operating Expense Base and the Real Estate Tax Base,
respectively exceeds Tenant's estimated monthly payments for the previous
calendar year, then Tenant shall within twenty (20) days after receiving
Landlord's certification, pay such deficiency to Landlord. In the event of an
overpayment by Tenant, such overpayment (not to exceed the amount of the
estimated payments) shall be refunded to Tenant, at the time of certification,
in the form of an adjustment in the Additional Rental next coming due, or if at
the end of the Term by a refund. By written notice given to Landlord no later
than six (6) months following delivery of the written certification of Landlord,
Tenant shall have the right to audit, or have audited the written certification
and the books and record from which such certification is derived. Tenant shall
pay the costs of any such audit, unless it is determined that Tenant's
overpayment was more than five percent (5%) of the actual amount in which case
Landlord shall reimburse Tenant for the reasonable cost of the audit.

                                      -4-

<PAGE>
     D. For purposes of this Article, the term "Real Estate Taxes" means the
total of all taxes, fees, charges and assessments, general and special, ordinary
and extraordinary, foreseen or unforeseen, which become due and payable upon
the Building. All reasonable costs and expenses incurred by Landlord during
negotiations for or contests of the amount of Real Estate taxes shall be
included within the term "Real Estate Taxes." For purposes of this Article,
the term "Operating Expenses" shall be deemed to mean all costs and expenses
directly related to the Building incurred by Landlord to the repair, operation,
management and maintenance of the Building including interior and exterior and
common area maintenance, management fees, cleaning expenses, energy expenses,
insurance premiums, and the amortization of capital investments made to reduce
operating costs (including reroofing costs) or that are necessary due to
governmental requirements, all in accordance with generally accepted accounting
principles. Notwithstanding the foregoing, the parties acknowledge and agree
that the janitorial services and electricity to the Premises shall be supplied
by Tenant at its costs and/or submetered and paid for by Tenant ("Tenant
Supplied Utilities") and Tenant acknowledges that it shall be given no credit
against Operating Expenses for those portions of the Premises being serviced by
Tenant Supplied Utilities. The following shall be included in Operating
Expenses:

     (1) real estate brokerage and leasing commissions;

     (2) cost of alterations of any tenant's premises;

     (3) allowances or concessions provided to any tenant or occupant of the
Building;

     (4) costs incurred to make major repairs or replacements of any defective
initial construction of the Building and related appurtenances regardless of how
such costs are characterized under generally accepted accounting principles;

     (5) legal expenses incurred in connection with the preparation or
negotiation of leases, subleases, assignments or other lease-related documents
with current, prior or prospective tenants or occupants of the Building;

     (6) marketing or advertising costs to solicit new tenants;

     (7) wages, salaries, fees, and fringe benefits paid to executive personnel
or officers or partners of Landlord not having direct day to day responsibility
for operating or providing services to the Building;

     (8) the cost, above any applicable deductible, of repairs or other work
occasioned by fire, windstorm or other casualty of an insurable nature or by the
exercise of eminent domain;

     (9) costs incurred for alterations, replacements or improvements that would
be considered capital improvements under sound accounting and management
principles consistently applied, except current amortization (together with
interest of ten percent (10%) per annum on the unamortized amount) of the
capital improvement cost over the reasonable useful life of the improvement
where such capital improvement is reasonably necessary to improve the operation
or maintenance efficiency of the Building or as otherwise expressly permitted
above, provided that the amortization costs charged to direct costs for capital
improvements to improve the operation or maintenance efficiency of the Building
shall be limited to the estimated reduction in direct costs for the relevant
years resulting from such capital improvements;

     (10) expenses in connection with services or other benefits of a type which
are not provided or available to Tenant but which are provided to another tenant
of the Building or to some other third party,

     (11) costs incurred due to violation by Landlord or any tenant of the
Building of the terms or conditions of any lease;

     (12) Landlord's general overhead except as it directly relates to the
management and operation of the Building;

     (13) all items and services for which any tenant reimburses Landlord or
pays third persons;

     (14) ground lease rentals, principal or interest payments, refinancing
charges or points, or penalties resulting from late payments by the landlord, or
depreciation;

     (15) costs incurred in connection with the cure or correction of latent
defects at the Building and cost incurred in connection with the clean-up of
Hazardous Substances from the Project or Building;

     (16) Landlord's cost of services sold separately to tenants for which
Landlord is entitled to be reimbursed by such tenants as an additional charge;

     (17) costs incurred in connection with negotiations or disputes with
tenants of the Building;

     (18) costs incurred in connection with renovating or otherwise improving or
decorating leased space for other tenants or other occupants or vacant tenant
space, other than common areas;

     (19) any particular item or service for which Tenant otherwise reimburses
Landlord by direct payment;

     (20) any expense for which Landlord is compensated through proceeds of
insurance or agreements of indemnity or surety bonds of guaranties;

     (21) any fines or penalties incurred due to actual or alleged violations
by Landlord of any governmental rule or authority;

     (22) cost of legal, accounting and other professional services incurred by
Landlord in connection with leasing activities or other activities which are not
Operating Expenses, and costs of audits of any kind performed by tenants;

     (23) any bad debt loss, rent loss, or reserves for bad debt or rent loss;

     (24) Landlord's general corporate overhead and general administrative
expenses; and

     (25) Costs arising from Landlord's charitable or political contributions.

     F. Landlord may at any time designate a fiscal year in lieu, of a calendar
year and in such event, at the time of such a change, there may be a billing for
the fiscal year which is less than 12 calendar months.

                                      -5-
<PAGE>

     F. Landlord reserves, and Tenant hereby assigns to Landlord, the sole and
exclusive right to contest, protest, petition for review, or otherwise seek a
reduction in the Real Estate Taxes. In the event of any reductions in the Real
Estate Taxes due to Landlord's contesting the same which relate to texts due and
payable for a year during the Term, such tax reduction, after payment of
Landlord's costs and expenses incurred in connection with effectuating such
reduction, shall be retroactively given effect, and Tenant shall be refunded its
Proportionate Share of said reduction (but not below the Real Estate Tax Base).

     G. Landlord shall keep and maintain records of all Operating Expenses, Real
Estate Taxes for a period of not less than two (2) years, which records shall be
made available to Tenant at reasonable times at Landlord's offices for
inspection and copying by Tenant or its representatives, at Tenant's cost. If
Tenant in good faith disputes the accuracy of the total amount of Operating
Expenses or Real Estate Taxes, Tenant may audit Landlord's books and records by
Tenant's representative. If such audit establishes that any of the actual
Operating Expenses or Real Estate Taxes are less than Landlord's final
determination thereof by four percent (4%) or more, then Landlord shall pay the
cost of such audit. Any over-charged or under-paid amounts shall be reimbursed
by the responsible party with thirty (30) days following delivery of such audit
to Landlord, provided Landlord does not contest the same. Any amounts payable
pursuant to this Lease Agreement shall continue to be paid during the pendency
of any audit or dispute, but upon final determination or resolution of such
dispute, any amounts payable by one party to the other hereunder shall bear
interest at the rate of eight percent (8%) per annum.

ARTICLE 7 - UTILITIES AND SERVICE
     A. Landlord agrees to provided water and sanitary sewer services to the
common area restrooms of the Building, together with janitorial supplies and
cleaning services to such restroom facilities.

     B. Landlord agrees to furnish heat during the usual heating season and air
conditioning during the usual air conditioning season (provided Tenant does not
remove and/or relocate the HVAC duct work serving the office areas of the
Premises), as well as electricity and janitorial services to the office areas of
the Premises (all specifically excluded from the Electrical Room), on a 24-hour
basis. Electricity to the Premises shall be by separate submeter.

     C. No temporary interruption or failure of such services incidental to the
making of repairs, alterations or improvements, or due to accidents or strike
or conditions or events not under Landlord's control, shall be deemed as an
eviction of the Tenant of relieve the Tenant from any of the Tenant's
obligations hereunder. Notwithstanding the foregoing, if for any reason
whatsoever, except due to force majure or by any negligent act or omission or
intentional misconduct of Tenant and as a result: (i) all or any portion of the
Premises shall become untenantable (the "Untenantable Premises") for the normal
conduct of Tenant's business for a period of three (3) consecutive days, (ii)
Tenant shall vacate the Untenantable Premises and cease doing business therein
(provided, however, that the continued presence of Tenant's security personnel
therein for the purposes of preservation of Tenant's property shall not
constitute a failure by Tenant to vacate the Untenantable Premises) and (iii)
Tenant shall give notice to Landlord of the facts set forth in clauses (i) and
(ii) above, then in such event, the portion of the Rents allocable to the
Untenantable Premises shall be fully abated for the period commencing on the day
that all the conditions set forth in (i), (ii) and (iii) above shall first be
satisfied and ending on the date that the Untenantable Premises shall be
rendered usable for the normal conduct of Tenant's business and Landlord shall
have given notice thereof (or the date Tenant shall reoccupy the Untenantable
Premises for the normal conduct of its business, if earlier).

     D. For the purposes of this Article 7, normal business hours shall be
deemed to mean the period of time between 8:00 a.m. and 6:00 p.m., Monday
through Friday, and 8:00 a.m. to 1:00 p.m. Saturdays, and specifically excluding
Sundays and legal holidays. Landlord agrees that Tenant shall have access to the
Premises 24 hours per day, 7 days per week, however, after normal business hours
such access may be subject to the use of security cards and other rules and
regulations which Landlord may adopt from time to time with respect to the
Building, provided the same are reasonable and are equally applicable to all
tenants of the Building.

     E. Tenant shall have the right to place telecommunications equipment of its
customers within the Premises ("Co-Location") and such Co-Location shall not be
deemed an assignment or sublease under the terms of this Lease Agreement
regardless whether a written agreement exists between Tenant and its customers.

     F. Tenant agrees prior to such time as it installs its own Tenant Generator
(and during such time after Tenant has so installed its own Tenant Generator)
that it elects to continue to have available to it access to the Landlord's
existing back-up emergency generator at no cost. Tenant shall pay to Landlord
its proportionate costs of all maintenance repairs and replacement of the
Building's back-up emergency generator. Such proportionate use shall be based on
electrical connected load hooked up to said generator as compared to electrical
connected load of other tenants within the Building hooked up to said generator.

     G. If the Tenant installs its own Tenant Generator, Tenant shall cooperate
with the Landlord in load shedding and/or peak moving program when requested by
the electric utility supplier (Northern States Power Company). Tenant
acknowledges that compliance with Northern States Power Company's load shedding
program has resulted in lower electrical charges to Landlord and is expected to
result in lower electrical charges to Tenant.

ARTICLE 8 - NON-LIABILITY OF LANDLORD
     Except in the event of negligence of Landlord, its agents, employees or
contractors, or as specifically provided herein, Landlord shall not be liable
for any loss or damage for failure to furnish heat, air conditioning,
electricity, elevator service, water, sprinkler system or janitorial service.
Landlord shall not be liable for personal injury, death or any damage from any
cause, about the Premises or the Building except if caused by Landlord's
negligence or willful misconduct.

ARTICLE 9 - CARE OF PREMISES

     A. Tenant agrees:

          1. To keep the Premises in as good condition and repair as they were
in at the time Tenant took possession of same, reasonable wear and tear and
damage from fire and other casualty for which insurance is normally procured
excepted;

          2. To keep the Premises in a clean and sanitary condition and to be
responsible for janitorial services for the switch room;

          3. Not to commit any nuisance or waste on the Premises, overload the
Premises or the electrical, water and/or plumbing facilities in the Premises or
Building, throw foreign substances in plumbing facilities, or wastefully use any
of the utilities furnished by Landlord,

          4. To abide by such rules and regulations as may from lime to time be
reasonably promulgated by Landlord;

          5. To obtain Landlord's prior approval (not to be unreasonably
withheld) of the interior design of any portion of the Premises visible from the
common areas or from the outside of the Building. "Interior design" as used in
the preceding sentence shall include but not be limited to floor and wall
coverings, furniture, office design, artwork and color scheme; and

          6. Tenant shall maintain, repair and replace, if necessary any and all
equipment and/or facilities and/or trade fixtures which service, or is
dedicated, solely or exclusively to the Premises and/or Tenant, whether
initially installed by Landlord or Tenant, all at Tenant's sole cost and

                                      -6-

<PAGE>

     B. If Tenant shall fail to keep and preserve the Premises in the state of
condition required by the provisions of this Article 9, the Landlord may at its
option put or cause the same to be put into the condition and state of repair
agreed upon, and in such case the Tenant, on demand, shall pay the cost
thereof.

     C. Landlord agrees to keep and maintain the common areas of the Building
consistent with other Class D buildings in the Minneapolis central business
district and to supply janitorial services for only the office and common areas.

ARTICLE 10- NON-PERMITTED USE

     A. Tenant agrees to use the Premises only for the purposes set forth in
Article 2 hereof. Tenant further agrees not to commit or permit any act to be
performed on the Premises or any omission to occur which shall be in violation
of any statute, regulation or ordinance of any governmental body or which will
increase the insurance rates on the Building or which will be in violation of
any insurance policy carried on the Building by the Landlord. Tenant, at its
expense, shall comply with all governmental laws, ordinances, rules and
regulations applicable to Tenant's particular use of the Premises and shall
promptly comply with all governmental orders, rulings and directives for the
correction, prevention and abatement of any violation upon, or in connection
with Tenant's particular use of the Premises, including the making of any
alterations or improvements to the Premises, all at Tenant's sole cost and
expense. The Tenant shall not disturb other occupants of the Building by making
any undue or unseemly noise which shall not do or permit to be done in or about
the Premises anything which will be dangerous to life or limb. In connection
with the foregoing provision, Tenant covenants and agrees that it shall not
store, process, produce or dispose of any flammables, explosives, radioactive
materials, ACM's, polychlorinated biphesyls (PCB's), chemicals known to cause
cancer or reproductive toxicity, pollutants, contaminants, hazardous waste,
toxic substances, petroleum and petroleum products, chloraflora carbons (CFC's)
and substances declared to be hazardous or toxic (collectively "Hazardous
Substances") in violation of any present or future federal, state or local
environmental law, ordinance or regulation ("Environmental Laws") upon the
Premises or any part thereof without first obtaining Landlord's written consent,
which consent may be withheld or denied in Landlord's sole discretion, provided
that Landlord hereby consents to Hazardous Substances in small quantities as are
typically used in as office building (such as, toner, cleaning fluids, etc.).
Tenant agrees to indemnify and defend and hold Landlord harmless from and
against all fines, suits, claims, actions, damages, liabilities, costs and
expenses (including reasonable attorneys' fees) asserted against Landlord
arising out of and in any way connected with Tenant's failure to comply with
its obligations of this Paragraph or arising from the consented to presence of
Hazardous Substances (specifically including any diesel fuel), which
indemnification shall survive the expiration of the termination of this Lease
Agreement.

     B. Landlord represents that it was not the owner of the Building during
construction, and makes no representations as to any Hazardous Substances but
Landlord shall make available that certain Phase I Environmental Report prepared
on behalf of the FDIC/RTC ("Environmental Report") to Tenant. Landlord hereby
covenants that if, at any time during the Term of the Lease Agreement, as the
same may he extended, "Hazardous Substances" are required to be removed,
encapsulated or otherwise remediated by any legal governmental authority
having jurisdiction over the Building, the presence for which Landlord is the
"responsible party" and Tenant is not a "responsible party" (as defined by
Environmental Laws) then Landlord shall so remediate the same as so required, at
Landlord's sole cost and expense and not as a part of Operating Expenses.
Landlord agrees to indemnify and defend and hold Tenant harmless from and
against all fines, suits, claims, actions, damages, liabilities, costs and
expenses (including attorneys' fees) asserted by such governmental authorities
against Tenant arising out of or in any way connected with Landlord's failure to
comply with its obligations in the preceding sentence, which indemnification
shall survive the expiration or the termination of this Lease Agreement.

ARTICLE 11 - INSPECTION

     The Landlord or its employees or agents shall have the right without any
diminution of rent or other charges payable hereunder by Tenant to enter the
Premises at all reasonable times for the purpose of exhibiting the Premises to
prospective tenants or purchasers, inspection, cleaning, repairing, testing,
altering or improving the same or said Building, but nothing contained in this
Article shall be construed so as to impose any obligation on the landlord to
make any repairs, alterations or improvements. Landlord's rights under this
section shall be exercised in such a manner as to create the least practicable
interference with Tenant's use and occupancy of the Premises. Except that the
case of an emergency which makes notice to Tenant impractical, any entry on
the Premises by Landlord shall be made at reasonable times after reasonable
notice to Tenant. In exercising Landlord's rights of entry, Landlord shall
comply with Tenant's reasonable security regulations of which Landlord has been
advised of in writing. Landlord hereby recognizes that Tenant is engaged in a
business that involves access to privileged and confidential matters and
information and agrees to take reasonable precautions as to not compromise such
confidentiality. Therefore Landlord agrees that Landlord may enter and pass
through the Premises only when accompanied by a representative of Tenant,
provided that Tenant agrees to make such representative available. Landlord
agrees that it shall not enter the Premises for the purpose of exhibiting the
Premises to prospective tenants, except during the last nine (9) months of any
Term, or at any time when Tenant is in default.

ARTICLE 12 - ALTERATIONS

     Tenant will not make any alterations, additions or improvements in or to
the Premises or add, disturb or in any way change any plumbing, wiring,
life/safety or mechanical systems, locks, or structural portions of the
Building without the prior written consent of the Landlord as to the character
of the alterations, additions or improvements to be made, the manner
of doing the work, and the contractor doing the work. Such consent shall not be
unreasonably withheld or delayed, if such alterations, repairs additions or
improvements are required of Tenant or are the obligation of Tenant pursuant
to this Lease Agreement. All such work shall comply with all applicable
governmental laws, ordinances, rules and regulations. Tenant agrees to indemnify
and hold Landlord free and harmless from any liability, loss, cost, damage or
expense (including attorney's fees) by reasons of any said alteration, repairs,
additions or improvements.

ARTICLE 13 - SIGNS

     Tenant agrees that no signs or other advertising materials shall be
erected, attached or affixed to any portion of the interior or exterior of the
Premises or the building without the express prior written consent of Landlord.
Landlord, at its sole cost and expense, shall install Building standard tenant
graphics at the main entry to the Premises and an identification strip
for Tenant on the Building's lobby directory.

ARTICLE 14 - COMMON AREAS

     A. Tenant agrees that the use of all corridors, passageways, elevators,
toilet rooms, parking areas and landscaped area in and around said Building, by
the Tenant or Tenant's employees, visitors or invitees, shall be subject to such
reasonable rules and regulations as may from time to time be made by Landlord
for the safety, comfort and convenience of the owners, occupants, tenants and
invitees of said Building. Tenant agrees that no awnings, curtains, drapes or
shades shall be used upon the Premises except as may be approved by Landlord,
such approval not to be unreasonably withheld, delayed or conditioned.

     B. In addition to the Premises, Tenant shall have; the right of
non-exclusive use, in common with others, of (a) all unrestricted automobile
parking areas, driveways and walkways, and (b) loading facilities, freight
elevators and other facilities as may be constructed in the Building, all to be
subject to the Terms and conditions of this Lease Agreement and to reasonable
rules and regulations for the use thereof as prescribed from time to tune by
Landlord.

     C. Landlord shall have the right to make changes or revisions in the site
plan and in the Building so as to provide additional leasing area. Landlord
shall also have the right to construct additional buildings on the land
described on Exhibit A-2 for such purposes as Landlord may deem appropriate.
Subject to Tenant's rights in respect of the Tenant Improvements, Landlord also
reserves all airspace rights above, below and to all sides of

                                      -7-
<PAGE>

the Premises, including the right to make changes, alterations or provide
additional leasing areas, provided the same do not interfere with Tenant's
operations on or from the Premises.

     D. Landlord and Tenant agree that Landlord will not be responsible for any
loss, then or damage to vehicles, or the: contents thereto; parked or left in
the parking areas of the Building and Tenant agrees to so advise its employees,
visitors or invitees who may use such parking areas The parking areas shall
include those areas designated by Landlord. In its sole discretion, as either
restricted or unrestricted parking areas. All restricted parking areas shall be
leased only by separate license agreement with Landlord. Landlord agrees to
provide Tenant, subject to availability unassigned parking spaces pursuant to
license agreements in the form of Exhibit C. The parking spaces being made
available to Tenant pursuant to the paragraph shall be made available at the
commencement of the Term and continuing thereafter during the balance of the
Term and Renewal Terms but only to the extent Tenant continues the initial
number of parking spaces continuously. If Tenant should cease one or more such
parking spaces, the Landlord shall not and does not guaranty that Tenant shall
be entitled to subsequently have such parking spaces available to it.

ARTICLE 15 - ASSIGNMENT AND SUBLETTING

     A. Tenant agrees not to assign, sublet, license, or encumber this Lease
Agreement, the Premises, or any part thereof, whether by voluntary act,
operation of law, or otherwise without the specific prior written consent of
Landlord; provided however, landlord agrees not to unreasonably withhold, delay
or deny such consent if i) such assignment or sublease is in writing and the
assignee or sublessee assumes all the obligations of Tenant under this Lease
Agreement; ii) the proposed subtenant or assignee has a net worth of One Million
Dollars ($1,000,000) or more at the time of such assignment or subletting; iii)
the remaining provisions of this Lease Agreement continue to be applicable; and
iv) Tenant shall remain liable hereunder Landlord further hereby gives its
consent (subject however to Tenant's providing ten (10) days prior written
notice and clauses i), iii) and iv) above being applicable) to an assignment of
this Lease Agreement or sublease of the Premises to an "Affiliate" of Tenant or
to any entity into or with which Tenant merged or to the purchaser of all
or substantially all the ownership interests or assets of Tenant; provided the
survivor or transferee continues to operate the business of Tenant as a going
concert. For purposes hereof an Affiliate shall mean any party that is "related
to" Tenant as that term is defined by Sec 267(b) of the Internal Revenue Code of
1986. Consent by Landlord in one such instance shall not be a waiver of
Landlord's rights under this Article as to requiring consent for any subsequent
instance. In the event Tenant desires to sublet a part or all of the Premises,
or assign this Lease Agreement, Tenant shall give written notice to Landlord at
least thirty (30) days prior to the proposed subletting or assignment, which
notice shall state the name of the proposed subtenant or assignee, the terns of
any sublease or assignment documents and copies of financial reports or other
relevant financial information of the proposed subtenant or assignee. At
Landlord's option, any and all payments by the proposed assignee or sublessee
with respect to the assignment to sublease shall be paid directly to Landlord.
In any event no subletting or assignment shall release Tenant of its obligation
to pay the rent and to perform all other obligations to be performed by Tenant
hereunder for the Term of this Lease Agreement. The acceptance of rent by
Landlord from another person shall not be deemed to be a waiver by Landlord of
any provision hereof.

     B. Notwithstanding anything to the contrary contained in this Article,
Tenant may collaterally assign, mortgage, pledge, hypothecate, without
Landlord's consent, its interest in this Lease Agreement to any financing
entity, or agent on behalf of any financing entity to whom Tenant: i) has
obligations for borrowed money or in respect of guarantees thereof, ii) has
obligations evidenced by bonds, debentures, notes, or similar instruments, or
iii) has obligations under or with respect to letters of credit, bankers'
acceptances and similar facilities or in respect of guarantees thereof:

     C. Landlord's right to assign this Lease Agreement is and shall remain
unqualified upon any sale or transfer of the Building and providing the
purchaser succeeds to the interests of Landlord under this Lease Agreement and
assumes the Landlord's obligations hereunder, Landlord shall thereupon be
entirely freed of all obligations of the Landlord accruing hereunder after such
conveyance and shall not be subject to any liability, resulting from any act or
omission or event occurring after such conveyance.

<PAGE>

ARTICLE 16 - LOSS BY CASUALTY

     A. If the Building is damaged or destroyed by fire or other casualty, (the
Landlord shall have the right to terminate this Lease Agreement, provided it
gives written notice thereof to the Tenant within ninety (90) days after such
damage or destniction. If a portion of the Premises of Building is damaged by
fire or other casualty, and in the reasonable opinion of Landlord: i) the
Premises cannot be restored to tenantable condition within a period of ninety
(90) days following the commencement of such restoration work, and/or ii) (the
cost of performing such restoration work exceeds the proceeds of Landlord's
casualty insurance by more than $100,000, then Landlord shall not be required
to make any repairs and Landlord shall have the right to terminate the Lease
Agreement upon written notice to Tenant within thirty (30) days of the date of
such fire or other casualty, the which event, the Lease Agreement shall
terminate as of the date of such notice and Landlord and Tenant shall be:
released from any and all liability thereafter accrued hereunder. Landlord
shall notify Tenant of its decision to rebuild or not within said thirty (30)
day period. Anything herein to the contrary notwithstanding if the Premises are
destroyed or so damaged that they cannot be repaired and made tenantable within
ninety (90) days following commencement of such restoration work, or so damaged
that Landlord shall decide not to repair or rebuild, or Landlord decides to
repair or rebuild, or Landlord decides to repair or rebuild, but does not
restore the Premises to a tenantable condition within ninety (90) days after
commencement of such restoration work (subject to an extension of up to an
additional sixty (60) days due to causes beyond Landlord's control), then, in
any of such instances, Tenant may terminate this Lease Agreement by giving
notice to Landlord within thirty (30) days after Tenant's receipt of Landlord's
notice or the expiration of said ninety (90) day period (as extended due to
causes beyond Landlord's control, as set forth above) as applicable, in which
event this Lease Agreement shall terminate as of the date of such notice and
Landlord and Tenant shall be released from any and all liability thereafter
accruing hereunder. If this Lease Agreement has not been determinated by either
Landlord or Tenant, then the rents due hereunder shall abate during such period
of time as the Premises are untenantable, in the proportion that the
untenantable portion of the Premises bears to entire Premises.

     B. If the Premises are to be repaired under this Article 16, Landlord shall
repair any injury or damage to the Building itself and the Premises in
substantially the condition the Premises were in at the execution of this Lease
Agreement, specifically excluding any leasehold improvements constructed by
Tenant, Tenant's Equipment or any Collateral, all of which shall be restored to
the extent Tenant deems necessary, at Tenant's sole cost and expense. Tenant
shall, at its own cost and expense, remove all of its furniture and other
personal property from the Premises as Landlord shall reasonably require in
connection with its repair and restoration of the Premises under this Article
16.

ARTICLE 17 - WAIVER OF SUBROGATION

     Landlord and Tenant hereby release the other from any and all liability or
responsibility to the other or anyone claiming through or under them by way of
subrogation or otherwise for any loss or damage to property caused by fire or
any of the extended coverage or supplementary contract casualties, even if such
fire or other casualty shall have been caused by the fault or negligence of the
other party, or anyone for whom such party may be responsible, provided however,
that this release shall be applicable and in force and effect only with respect
to loss or damage occurring during such times as the releasing party's policies
shall contain a clause or endorsement to the effect that any such release would
not adversely affect or impair said policies or prejudice the right of the
releasing party to recover thereunder. Landlord and Tenant agree that they will
request their insurance carriers to include in their policies such a clause or
endorsement. If extra cost shall be charged therefore, each party shall advise
the other of the amount of the extra cost, and the other party, at its election,
may pay the same, but shall not be obligated to do so.

ARTICLE 18 - EMINENT DOMAIN

     If the entire Building is taken by eminent domain, this Lease Agreement
shall automatically terminate as of the date of taking. If a portion of the
Building is taken by eminent domain, the Landlord shall have the right to
terminate this Lease Agreement, provided it gives written notice thereof to the
Tenant within ninety (90) days after the date of taking. If a portion of the
Premises is taken by eminent domain and this Lease Agreement is not

                                      -8-
<PAGE>

terminated by Landlord, Tenant shall have the right to terminate this Lease
Agreement, provided it gives written notice thereof to Landlord within ninety
(90) days of the date of taking. If neither Landlord nor Tenant terminates,
the Landlord shall, at its expense, restore the Premises to as near the
condition which existed immediately prior to the date of taking as reasonably
possible, and the rentals shall abate during such period of time us the Premises
are untenantable, in the proportion that the untenantable portion of the
Premises bears to the entire Premises. All damages awarded for such taking under
the power of eminent domain shall belong to and be the sole property of
Landlord, irrespective of the basis upon which they are awarded, provided,
however, that nothing contained herein shall prevent Tenant from making a
separate claim to the condemning authority for its moving expenses and trade
fixtures. For purposes of this Article, a taking by eminent domain shall include
Landlord's giving of a deed under threat of condemnation, and shall be deemed to
occur on the earlier of the date fee simple title has vested or possession has
been obtained by the taking authority.

ARTICLE 19 - SURRENDER
     On the last day of the Tenn of this Lease Agreement or on the sooner
termination thereof in accordance with the terms hereof, Tenant shall peaceably
surrender the Premises in good condition and repair consistent with Tenant's
duty to make repairs as provided in Article 9 hereof. On or before said last
day, Tenant shall at its expense removes all of its equipment from the
Premises, repairing any damage caused thereby, and any property not removed
shall he deemed abandoned, with the exception of any "Collateral" (as defined in
Article 28 below) to the extent of any security interests by third parties. All
alterations, additions and fixtures other than Tenant's trade fixtures, which
have been made or installed by either Landlord or Tenant upon the Premises
shall remain as Landlord's property and shall be surrendered with the Premises
as a part thereof, or shall be removed by Tenant (unless such right to remove
has been waived by Landlord pursuant to Article 4 above), which event Tenant
shall at its expense repair any damage caused thereby. It is specifically agreed
that any and all telephonic, coaxial, ethernet, or other computer,
word-processing, facsimile, or electronic wiring installed by Tenant within the
Premises (hereafter "Wiring") shall be removed at Tenant's cost at the
expiration of the Term, unless Landlord has specifically requested in writing
that said Wiring shall remain, whereupon said Wiring shall be surrendered with
the Premises as Landlord's property. If the Premises are not surrendered at the
end of the Term or the sooner termination thereof, Tenant shall indemnify
Landlord against loss or liability resulting from delay by Tenant in so
surrendering the Premises, including, without limitation, claims made by any
succeeding tenant founded on such delay. Tenant shall promptly surrender all
keys for the Premises to Landlord at the place then fixed for payment of rental
and shall inform Landlord of combinations on any locks and safes on the
Premises.

ARTICLE 20 - NON-PAYMENT OF RENT, DEFAULTS
     If any one or more of the following occurs: (1) a rent payment or any other
payment due from Tenant to Landlord shall be and remain unpaid in whole or in
port for more than ten (10) days after same is due and payable; (2) Tenant
shall violate or default on any of the other covenants, agreements, stipulations
or conditions herein, or in any parking agreement(s) or other agreements between
Landlord and Tenant relating to the Premises, and such violation or default
shall continue for a period of thirty (30) days after written notice from
Landlord of such violation or default or if such violation or default shall
reasonably require longer than thirty (30) days to cure, if Tenant shall fail
to commence the cure of such default or violation within thirty (30) days after
receipt of notice thereof and/or fail to prosecute a cure to completion with due
diligence; (3) if Tenant shall commence or have commenced against Tenant
proceedings under a bankruptcy, receivership, insolvency or similar type of
action; or (4) if Tenant shall abandon the Premises; then it shall be optional
for Landlord, without further notice or demand, to cure such default or to
declare this Lease Agreement forfeits and the said Term ended, or to terminate
only Tenant's right to possession of the Premises, and to re-enter the Premises,
with or without process of law, using such force as may be necessary to remove
all persons or chattels therefrom, and Landlord shall not be liable for damages
by reason of such re-entry or forfeiture; but notwithstanding re-entry by
Landlord or termination only of Tenant's right to possession of the Premises,
the liability of Tenant for the rent and all other sums provided herein
shall not ha relinquished or extinguished for the balance of the Term of this be
Lease Agreement and Landlord shall be entitled to periodically sue Tenant for a
all sums due under this Lease Agreement or which become due prior to judgment,
but such suit shall not bar subsequent suits for any further sums coming due
thereafter. Tenant shall he responsible for, in addition to the rentals and
other sums agreed to be paid hereunder, the cost of any necessary maintenance,
repair, restoration, reletting (including related cost of removal or
modification of tenant improvements) or cure us well as reasonable attorney's
fees incurred or awarded in any suit or action instituted by Landlord to enforce
the provisions of this Lease Agreement, regain possession of the Premises. or
the collection of the rentals due Landlord hereunder, Tenant shall also be
liable to Landlord for the payment of a late charge in the: amount of 5% of the
rental installment or other sum due Landlord hereunder if said payment has not
been receive) within ten (10) days from the date said payment becomes due and
payable, or cleared by Landlord's bank within three (3) business days after
deposit. Tenant agrees to pay interest at the highest permissible rate of
interest allowed under the usury statutes of the State of Minnesota, or in case
no such maximum rate of interest is provided, at the rate of 12% per annum, on
all rentals and other sums due Landlord hereunder not paid within ten (10) days
from the date same become due and payable. Each right or remedy of Landlord
provided for in this Lease Agreement shall be cumulative and shall be in
addition to every other right or remedy provided for in this Lease Agreement now
or hereafter existing at law or in equity or by statute or otherwise.

ARTICLE 21 - LANDLORD'S DEFAULT
     Landlord shall not be deemed to be in default under this Lease Agreement
until Tenant has given Landlord written notice specifying the nature of the
default and Landlord does not cure such default within thirty (30) days after
receipt of such notice or within such reasonable time thereafter as may be
necessary to cure such default where such default is of such a character us to
reasonably require more than thirty (30) days to cure.

ARTICLE 22 - HOLDING OVER
     Tenant will, at the expiration of this Lease Agreement, whether by lapse
of time or termination, give up immediate possession to Landlord. If Tenant
fails to give up possession Landlord may, at its option, serve written notice
upon Tenant that such holdover constitutes any one of (i) creation of a month
to month tenancy, or (ii) creation of a tenancy at sufferance. If Landlord does
not give said notice, Tenant's holdover shall create a tenancy at sufferance. In
any such event the tenancy shall be upon the terms and conditions of this Lease
Agreement, except that the Minimum Rental shall be 150% the Minimum Rental
Tenant was obligated to pay Landlord under this Lease Agreement immediately
prior to termination (in the case of tenancy the sufferance such Minimum Rental
shall be prorated on the basis of a 365 day year for each day Tenant reamains in
possession); excepting further that in the case of a tenancy at sufferance, no
notices shall be required prior to commencement of any legal action to gain
repossession of the Premises. In the case of a tenancy at sufferance, Tenant
shall also pay to Landlord all damages sustained by Landlord resulting from
retention of possession by Tenant, provide) such damages shall not include
consequential damages if such holdover is for five (5) business days
or less. The provisions of this paragraph shall not constitute a waiver by
Landlord of any right of re-entry as otherwise available to Landlord, nor shall
receipt of any rent or any other act in apparent affirmance of the tenancy
operate as a waiver of the right to terminate this Lease Agreement for a breach
by Tenant hereof.

ARTICLE 23 - SUBORDINATION

     Tenant agrees that this Lease Agreement shall be subordinate to any
mortgage(s) that may now or hereafter be placed upon the Building or any part
thereof, and to any and all advances to he made thereunder, and to the interest
thereon, and all renewals, replacements, and extensions thereof and to execute
a specific subordination agreement (in a form reasonably requested by mortgagee)
if so requested by Landlord, provide) the mortgagee named in such subordination
shall agree to recognize this Lease Agreement or Tenant in the event of
foreclosure provided the Tenant is not in default by including non-disturbance
language, in recordable form. In the event of any mortgagee electing to have
the Lease Agreement a prior encumbrance to its mortgage, then and in such event
upon such mortgagee notifying Tenant to that effect, this Lease Agreement shall
be deemed prior in encumbrance to the said mortgage, whether this Lease
Agreement is dated prior to or subsequent to the date of said mortgage. Landlord
shall use its best efforts to obtain a non-disturbance agreement from the
existing mortgagee (the Federal Deposit Insurance Corporation) and any future
mortgagees, in a form reasonably satisfactory to such mortgagee and Tenant.

                                       -9-
<PAGE>

ARTICLE 24 - INDEMNITY, INSURANCE AND SECURITY

            A. Tenant will keep in force at its own expense for so long as this
Lease Agreement remains in effect public liability insurance with respect to the
Premises in which Landlord shall be named as an additional insured, in companies
and in form acceptable to Landlord with minimum combined limit of liability of
Two Million Dollars ($2,000,000.00). This limit shall apply per location. Said
insurance shall also provide [ILLEGIBLE] contractual liability coverage by
endorsement. Tenant shall further provide business interruption insurance to
cover a period of not less than six (6) months. Tenant will further deposit with
Landlord the policy or policies of such insurance or certificates thereof, or
other acceptable evidence that such insurance is in effect, which evidence shall
provide that Landlord shall be notified in writing thirty (30) days prior to
cancellation, material change, failure to renew the insurance. Tenant further
covenants and agrees to indemnify and hold Landlord and Landlord's manager of
the Building harmless for any claim, loss or damage, including reasonable
attorney's fees, suffered by Landlord, Landlord's manager or Landlord's other
tenants caused by: i) any act or omission by Tenant, Tenant's employees or
anyone claiming through or by Tenant in, at, or around the Premises or the
Building; ii) [ILLEGIBLE] conduct or management of any work or thing whatsoever
done by Tenant in or about the Premises; or iii) Tenant's failure to comply with
any and all governmental laws, rules, ordinances or regulations applicable to
Tenant's particular use of the Premises. If Tenant shall not comply with its
covenants made in this Article 24, Landlord may, at its option, cause insurance
as aforesaid to be issued and in such event Tenant agrees to pay the premium of
such insurance promptly upon Landlord's demand.

            B. Tenant shall be responsible for the security and safeguarding of
the Premises and all property kept, stored or maintained on the Premises.
Landlord will make available to Tenant at Tenant's request, the plans and
specifications for construction of the Building and the Premises. Tenant
represents that it is satisfied that the configuration of the Building and the
Premises, including the location and dimensions of the floors, walls, windows,
doors and means of access thereto are suitable for the particular needs of
Tenant's business. The placement and sufficiency of all safes, vaults, cash or
security drawers, cabinets or the like placed upon the Premises by Tenant shall
be at the sole responsibility and risk of Tenant. Tenant shall maintain in force
throughout the Term, insurance upon all contents of the Premises, including that
owned by others and Tenant's equipment and all alterations, additions, fixtures,
or improvements in the Premises acknowledged by Landlord to be the Tenant's.

            C. Landlord shall carry and cause to be in full force and effect a
fire and extended coverage insurance policy on the Building, but [ILLEGIBLE]
contents owned, leased or otherwise in possession of Tenant. Landlord will also
keep in force during this Term public liability insurance with respect
[ILLEGIBLE] the Building with a minimum combined limit of liability of
$2,000,000. The cost of such insurance shall be an Operating Expense.

ARTICLE 25 - NOTICES

            All notices from Tenant to Landlord required or permitted by any
provisions of this Lease Agreement shall be directed to Landlord postage
prepaid, certified or registered mail or sent by U.S. express mail or any
nationally recognized overnight carrier with a signed receipt obtained upon
delivery, at the address provided for Landlord in the preamble to this Lease
Agreement or at such other address as Tenant shall be advised to use by
Landlord. All notices from Landlord to Tenant required or permitted by any
provision of this Lease Agreement be directed to Tenant, postage prepaid,
certified or registered mail or sent by U.S. express mail or any nationally
recognized overnight carrier with a signed receipt obtained upon delivery, at:
730 2nd Avenue South, Suite 1200, Minneapolis, MN 55402. Landlord and Tenant
shall each have the right at any time and from time to time to designate one (1)
additional party to whom copies of any notice shall be sent.

ARTICLE 26 - APPLICABLE LAW

            This Lease Agreement shall be construed under the laws of the State
of Minnesota.

ARTICLE 27 - MECHANICS' LIEN

            In the event any mechanic's lien shall at any time be filed against
the Premises or any part of the Building by reason of work, [ILLEGIBLE] services
or materials performed or furnished to Tenant or to anyone holding the Premises
through or under Tenant, Tenant shall forthwith cause the same to be discharged
of record. Tenant shall and hereby does indemnify Landlord from and against all
costs, damages and expenses (including reasonable attorney's fees) incurred by
Landlord as a result of any such mechanic's lien. If Tenant shall fail to cause
such lien forthwith to be discharged within twenty (20) days after being
notified of the filing thereof, then, in addition to any other right or remedy
of Landlord, Landlord may, but shall not be obligated to, discharge the same by
paying the amount claimed to be due, or by bonding, and the amount so paid by
Landlord and all costs and expenses, including reasonable attorney's fees
incurred by Landlord in procuring the discharge of such lien, shall be due and
payable in full Tenant to Landlord on demand. Landlord shall have the right to
post on the Premises notices of nonresponsibility for payment of labor and
materials supplied to the Premises pursuant to applicable law.

ARTICLE 28 - SECURITY DEPOSIT

            INTENTIONALLY DELETED.

ARTICLE 29- BROKERAGE

            Each of the parties represents and warrants that there are no claims
for brokerage commissions or finder's fees in connection with this Lease
Agreement and agrees to indemnify the other against, and hold it harmless from
all liabilities arising from any other such claim, including without limitation,
the cost of attorney's fees in connection therewith.

ARTICLE 30 - EXCULPATION

            Tenant agrees to look solely to Landlord's interest in the Building
for the recovery of any judgment from Landlord, it being agreed that Landlord
and Landlord's partners, whether general or limited (if Landlord is a
partnership) or its directors, officers or shareholders (if Landlord is a
corporation), shall never be personally liable for any such judgment.

ARTICLE 31 - ESTOPPEL CERTIFICATES

            Each party hereto agrees that at any time, and from time to time
during the Term of this Lease Agreement (but not more often than twice each
calendar year), within ten (10) days after request by the other party hereto, it
will execute, acknowledge and deliver to such other party or any prospective
purchaser, assignee or mortgagee designated by such other party, an estoppel
certificate in a form acceptable to Landlord. Tenant agrees to provide Landlord
(but not more than twice in any calendar year), within ten (10) days of request,
the then most current financial statements of Tenant and any guarantors of this
Lease Agreement, which shall be certified by Tenant, and if available, shall be
audited and certified by a certified public accountant. Landlord shall keep such
financial statements confidential, except Landlord shall, in confidence, be
entitled to disclose such financial statements to existing or prospective
mortgagees or purchasers of the Building.

ARTICLE 32 - GENERAL

            This Lease Agreement does not create the relationship of principal
and agent or of partnership or of joint venture or of an association between
Landlord and Tenant, the sole relationship between Landlord and Tenant being
that of landlord and tenant. No waiver of any default of Tenant hereunder shall
be implied from any omission by Landlord to take any action on account of such
default if such default persists or is repeated and no express waiver shall
affect any default other than the default specified in the express waiver and
that only for the time and to the extent therein stated. The covenants of Tenant
to pay the Minimum Rental and the Additional Rental are each independent of any
other covenant, condition, or provision contained in this Lease Agreement. The
marginal or topical headings of the several Articles, paragraphs and clauses are
for convenience only and do

                                      -10-
<PAGE>

not define, limit or construe the contents of such Articles, paragraphs or
clauses. All preliminary negotiations are merged into and incorporated in this
Lease Agreement. This Lease Agreement can only be modified or amended by an
agreement in writing signed by the parties hereto. All provisions hereof shall
be binding upon the heirs, successors and assigns of each party hereto. If any
term or provision of this Lease Agreement shall to any extant be held invalid or
unenforceable, the remainder shall not be affected thereby, and each other term
and provision of this Lease Agreement shall be valid and be enforced to the
fullest extent permitted by law. If Tenant is a corporation, each individual
executing this Lease Agreement on behalf of said corporation represents and
warrants that he is duly authorized to execute and deliver this Lease. Agreement
on behalf of said corporation in accordance with a duly adopted resolution of
the Board of Directors of said corporation or in accordance with the Bylaws of
said corporation, and that this Lease Agreement is binding upon said corporation
in accordance with its terms. No receipt or acceptance by Landlord from Tenant
of less than the monthly rent herein stipulated shall be deemed to be other than
a partial payment on account for any due and unpaid stipulated rent; no
endorsement or statement of any check or any letter or other writing
accompanying any check or payment of rent to Landlord shall be deemed an accord
and satisfaction, and Landlord may accept and negotiate such check or payment
without prejudice to Landlord's rights to (i) recover the remaining balance o
such unpaid rent or (ii) pursue any other remedy provided in this Lease
Agreement. Either party may record a memorandum of this Lease Agreement and the
parties agree to execute a reasonable form memorandum as presented by the other
party. Time is of the essence with respect to the due performance of the terms,
covenants and conditions herein contained. Submission of this instrument for
examination does not constitute reservation of or option for the Premises, and
this Lease Agreement shall become effective only upon execution and delivery
thereof by Landlord and Tenant.

ARTICLE 33 - QUIET ENJOYMENT

         Landlord covenants that Tenant, upon paying the rental and other
charges due hereunder and performing all of Tenant's obligations under this
Lease Agreement, shall peacefully and quietly hold, occupy and enjoy Premises
throughout the Term hereof, without molestation or hindrance by any person
holding, under or through Landlord, subject, however, to the provisions of this
Lease Agreement and to any mortgages or ground or underlying leases referred to
in Article 23 hereof. Any diminution or shutting off of light, air or view by
any structure which may be erected on lands adjacent to the Building shall in no
way affect this Lease Agreement or impose any liability on Landlord.

ARTICLE 34 - LIMITED EXPANSION RIGHT

          A. Provided Tenant is not then in default under this Lease Agreement
beyond the applicable grace period, Tenant shall have a right [ILLEGIBLE]
leasing Suite 407, contiguous to the Premises (hereafter referred to as the
"Option Space"), in the event such Option Space becomes "Available for Leasing"
(as defined below) during the original Term, subject to and conditioned upon the
provisions of this Article (the "Expansion Right").

          B. Landlord shall notify Tenant ("Landlord's Notice") in the event the
Option Space becomes "Available for Leasing"; or in the event Landlord has a
third party interested in leasing the Option Space which is then "Available for
Leasing". Tenant shall notify Landlord ("Tenant's Leasing Notice") within five
(5) business days after its receipt of Landlord's Notice as to whether Tenant
intends to exercise its Expansion Right with respect to said Option Space as so
identified in Landlord's Notice, time being of the essence. If Tenant exercises
its Expansion Right, it must do so with respect to [ILLEGIBLE] the Option Space
as so identified in Landlord's Notice. In such event, Landlord and Tenant shall
execute an amendment to the Lease Agreement incorporating the Option Space as so
identified into the Premises at the Minimum Rent at the then applicable rates as
set forth in the table of Paragraph 31 above. In the event Tenant fails to
notify Landlord within the time period set forth above, Tenant's rights under
this Article shall be null and void with respect to any lease entered into with
respect to the original prospective Tenant for the Option Space as so identified
in Landlord's Notice; provided such Expansion Right shall again be applicable in
the event Landlord does not lease such Option Space to the original prospective
Tenant within nine (9) months of the Landlord's Notice.

          C. Tenant's Expansion Right shall also include Tenant's providing
Landlord a Tenant's Leasing Notice (in the first instance and not in response to
a Landlord's Notice) with respect to the Option Space which is then "Available
for Leasing" provided no Landlord's Notice has been given to Tenant with respect
to any portion of such Option Space within the previous nine (9) months.

            D. The leasing of said Option Space shall commence as of the
"Effective Date" (as set forth below) and shall be in said Option Space's, then
"AS-IS" condition without any improvements, improvement allowances or other
modifications to be made by Landlord. For purposes of this Article, the
"Effective Date" shall mean the date on which Tenant shall begin paying rentals
upon the Option Space after it has exercised its rights to said space; which
shall be thirty (30) days after Tenant's Leasing Notice under this Article to
Landlord exercising its rights hereunder (or such sooner date as Tenant takes
possession and commences its business operations from within the Option Space).
The provisions of this Lease Agreement governing alterations of the Premises
shall apply with respect to the construction of any leasehold improvements
Tenant desires to make to such Option Space.

            E. Notwithstanding anything to the contrary in the foregoing, if
Tenant exercises its rights under this Article and there remains less than
thirty-six (36) months from the Effective Date to the expiration of the Term,
then the Tenant shall not be entitled to exercise its rights under this Article
unless it exercises its Option to Renew the Term, or if no such Option to Renew
can then be exercised, then Tenant shall no longer have any right under this
Article with respect to the Option Space.

            F. For purposes of this Article, "Available for Leasing" shall mean
the Option Space is not subject to any existing (as of the date of this Lease
Agreement) lease or first rights of refusal, first rights of negotiation, first
rights of leasing, expansion rights, renewal rights and/or similar rights of any
other third party tenant or such rights have been waived in writing (provided if
all such rights are to expire within six (6) months, Landlord may make such
Option Space Available for Leasing contingent upon the expiration of such
rights). In any event Landlord shall be entitled to renew or extend any lease of
an "Occupying Third Party" (as defined below), without providing Tenant a
Landlord's Notice and without it being subject to any rights of a third party
under this Article. Tenants which are either presently occupying Option Space or
may be so occupying in the future pursuant to a third party lease which was
entered into after Tenant's rights were waived or deemed waived pursuant to
Paragraph B of this Article shall be deemed to be an "Occupying Third Party".

            G. If the Lease Agreement or Tenant's right to possession of the
Premises shall terminate in any manner whatsoever before Tenant shall exercise
its rights under this Article, or if Tenant shall have subleased or assigned all
or any portion of the Premises, then immediately upon such termination,
sublease, or assignment, then this Article and Tenant's rights hereunder shall
simultaneously terminate and become null and void. Such right is personal to
Tenant. Under no circumstances whatsoever shall the assignee under a complete or
partial assignment of the Lease, or a subtenant under a sublease of the
Premises, have any right to exercise any rights under this Article or have any
right to receive any Landlord's Notice.

ARTICLE 35 - CANCELLATION RIGHT

            A. Tenant shall have two separate rights to notify Landlord, that it
elects to terminate this Lease as of the end of the sixtieth (60th) [ILLEGIBLE]
the eighty-fourth (84) month of the Term, subject to and conditioned upon the
following conditions:

                  i. Tenant shall give Landlord written notice of Tenant's
            intention to terminate this Lease not less than six (6) months prior
            to either the fifth (5th) or the seventh (7) anniversaries of the
            Term, in accordance with the notice provisions set forth above
            ("Termination Notice");

                                      -11-
<PAGE>

                  ii. The Termination Notice shall set forth the effective date
            for said termination ("Termination Date") which date shall be
            midnight of the day prior to: i) the fifth (5th) anniversary of the
            Term (if the Termination Notice is given prior to the fifty-fourth
            (54th) month of the Term), or ii) the seventh (7th) anniversary of
            the Term (if the Termination Notice is given after the fifty-fourth
            (54th) month but prior to the seventy-eighth (78th) month of the
            Term);

                  iii. Tenant must not be in default either at the time of the
            Termination Notice nor at the Termination Date and Tenant must
            comply with all of the terms and conditions of this Lease Agreement
            (including surrender of the Premises as required by this Lease
            Agreement) through the Termination Date;

                  iv. Tenant must accompany said Termination Notice with a
            "Termination Fee", which shall be equal to six (6) months rental
            which would otherwise have been due under this Lease Agreement
            immediately following the Termination Date.

                  v. In no event shall Tenant be entitled to terminate this
            Lease if it has exercised its rights to renew under Article 1 above.

            B. The rights provided to Tenant under this Article are personal to
Tenant, which may assign them only in connection with an assignment of this
Lease Agreement to a company controlled by or which controls (directly or
indirectly) Advanced Telecommunications, Inc. ("Affiliate"), and such rights
shall expire automatically if Tenant assigns this Lease Agreement to any other
party or subleases all or any portion of the Premises to any other party.

            C. Tenant's rights under this Article may be exercise only once, but
at either of the two (2) time periods set forth above.

            D. Notwithstanding anything contained in this Article to the
contrary, if Tenant exercises its Expansion Right pursuant or in response to a
"Landlord's Notice" (as defined in Paragraph 34B above), then Tenant's right to
give a Termination Notice under this Article shall be suspended for a period
commencing with Tenant's giving of its "Tenant's Leasing Notice" (as defined in
Paragraph 34B above) and continuing through the 18th month subsequent to the
"Effective Date" (as defined in Paragraph 34D above). Any Termination Notice
given during such period shall be of no effect and shall not result in the
termination of this Lease Agreement. The restrictions of this Paragraph, and
specifically the suspension of Tenant's right to give a Termination Notice under
this Article shall not become applicable if Tenant exercises its Expansion Right
pursuant to Paragraph 35C above (i.e. Tenant shall continue to have the rights
to terminate under this Article if Tenant's expansion was not in response to a
"Landlord's Notice").

            IN WITNESS WHEREOF, this Lease Agreement has been duly executed by
the parties hereto as of the day and year indicated above.

TENANT: ADVANCED TELECOMMUNICATIONS,     LANDLORD:  TIMESHARE SYSTEMS, INC.
INC.

By:  /s/ [Illegible]                     By:  /s/ [Illegible]
    ---------------------------------        --------------------------------
Its: Chief Financial Officer             Its: PRES.
    ---------------------------------        --------------------------------

By:                                      By:
    ---------------------------------        --------------------------------
Its:                                     Its:
    ---------------------------------        --------------------------------

Date: 3/30/99                            Date: 3/30/99
    ---------------------------------        --------------------------------

                              SCHEDULE OF EXHIBITS

          Exhibit A-1             Graphical depiction of Premises
          Exhibit A-2             Legal Description of Land and Building
          Exhibit B               License Agreement (Antenna)
          Exhibit C               License Agreement (Parking Lot Unassigned)
          Exhibit D               Rules and Regulations
          Exhibit E               Chiller License Agreement

                                      -12-
<PAGE>

                   [FLOOR PLANS FOR THE FOURTH FLOOR OMITTED]

                                  EXHIBIT A-1
<PAGE>

                                   EXHIBIT A-2
                                LEGAL DESCRIPTION

All of Block 7, Atwaters Addition to the Town of Minneapolis; all of Block 8,
Morrison, Smith and Hancocks Addition to Minneapolis; and that part of 12th
Avenue South, Morrison, Smith and Hancocks Addition to Minneapolis; and Atwaters
Addition to the Town of Minneapolis, lying Southwesterly of a line connecting
the most Easterly corner of Block 7, Morrison, Smith and Hancocks Addition to
Minneapolis; and the most Northerly corner of Block 8, Morrison, Smith and
Hancocks Addition to Minneapolis and Northeasterly of a line connecting the most
Southerly corner of Block 7, Atwaters Addition to the Town of Minneapolis and
the most Westerly corner of Block 8, Atwaters Addition to the Town of
Minneapolis; except that part of said Block 8 which lies Northeasterly of the
following described line:

Beginning at a point on the Southeasterly line of Lot 7, Block 8, distant 116.50
feet Southwesterly of the most Easterly corner thereof; thence run Northwesterly
to a point on the Northwesterly line of the Southeasterly half of Lot 9, said
Block 8, distant 10 feet Southwesterly of the Northeasterly line of said Lot 9,
and there terminating.

Also except that part of the Northwesterly 1/2 of Lot 9, Block 8, Atwater's
Addition to the Town of Minneapolis which lies Northeasterly of the following
described line. Beginning at a point on the Southeasterly line of the
Northwesterly 1/2 of Lot 9, Block 8, said Addition, distant 5 feet Southwesterly
of the most Easterly corner thereof, thence run Northwesterly to the most
Northerly corner of Lot 9 and there terminating.

All of Block 7, Morrison, Smith and Hancocks Addition to Minneapolis, except
that part of Lots 9, 10, 11 and 12 of said Block 7, described as follows:

Beginning at the most Northerly corner of said Lot 12; thence south 30 degrees
04 minutes 33 seconds West, on an assumed bearing, along the Northwesterly line
to said Lot 12, a distance of 127.58 feet; thence Easterly, a distance of 259.94
feet along a non-tangential curve concave to the South having a radius of 240.00
feet, central angle of 62 degrees 03 minutes 21 seconds and the chord of said
curve bears North 89 degrees 04 minutes 43 seconds East; thence North 30 degrees
06 minutes 24 seconds East along the prolongation of a radial line of said
curve, a distance of 0.08 feet to the Northeasterly line of said Lot 9; thence
North 59 degrees 54 minutes 07 seconds West along the Northeasterly line of said
Block 7, a distance of 212.08 feet to the point of beginning.

All according to the plats thereof on file and of record in the Hennepin County
Recorders Office and in the Office of the Registrar of Titles, and situate in
Hennepin County, Minnesota.

Part of the above shown below as Parcels 1 through 4, is Registered Property as
evidenced by Certificate No. 830754. Said Registered Property is described as
follows:

Parcel 1: Lots 3, 6, 8 and 9, Block 7;
That part of Lot 7, Block 7 lying Northeasterly of a line drawn parallel with
and distant 96 feet Southwesterly of the Southwesterly boundary line of 5th
Street;
The Northeasterly 60 feet of the Southwesterly 105 feet of Lot 1, Block 8;
Lots 2, 3, 4, 5, 6 and 10, Block 8;
That part of the Northwesterly 1/2 of vacated 12th Avenue South lying between
the extensions across it of the Northeasterly and Southwesterly lines of said
Lot 6, Block 7 and
That part of the Southeasterly 1/2 of vacated 12th Avenue South lying between
the extensions across it of the Northeasterly and Southwesterly lines of said
Northeasterly 60 feet of the Southwesterly 105 feet of Lot 1, Block 8,
all in Atwaters Addition to the Town of Minneapolis.

Parcel 2: That part of the following described Tract:
The Northwesterly 27 feet of the Northeasterly 100 feet of Lot 7;
The Southwesterly 39 feet of the Northeasterly 1 39 feet of Lot 7;
The Northwesterly 1/2 of Lot 8 and
The Southeasterly 1/2 of Lot 9,
all in Block 8, Atwaters Addition to the Town of Minneapolis, which lies
Southwesterly of a line drawn from a point on the Southeasterly line of said Lot
7, distant 116.50 feet Southwesterly of the most Easterly corner thereof to a
point on the Northwesterly line of said Southeasterly 1/2 of Lot 9, distant 10
feet Southwesterly of the Northeasterly line thereof

Parcel 3: Lots 3 and 8, Block 7.
That part of Lot 7, Block 7 lying Northeasterly of a line drawn parallel with
and distant 96 feet Southwesterly of the Southwesterly boundary line of 5th
Street and Lot 9, Block 7 except that part thereof lying Northerly of the
following described line: Beginning at the most Northerly corner of Lot 12, said
Block 7; thence South 30 degrees 04 minutes 33 seconds West, on an assumed
bearing, along the Northwesterly line of said Lot 12, a distance of 127.58 feet;
thence Easterly a distance of 259.94 feet along a non-tangential curve concave
to the South, having a radius of 240.00 feet, a central angle of 62 degrees, 03
minutes, 21 seconds and the chord of said curve bears North 89 degrees, 04
minutes, 43 seconds East, thence North 30 degrees, 06 minutes, 24 seconds East
along the prolongation of a radial line of said curve, a distance of 0.08 feet
to the Northeasterly line of said Lot 9 and said line there terminating,
all in Morrison, Smith and Hancocks Addition to Minneapolis.

Parcel 4: That part of the Northwesterly 1/2 of vacated 12th Avenue south lying
between the extensions across it of the Northeasterly line of Lot 7, Block 7,
Morrison. Smith and Hancocks Addition to Minneapolis and a line drawn parallel
to and distant 96 feet Southwesterly of the Northeasterly line of said lot 7

Subject to minerals and mineral rights reserved by the State of Minnesota; (As
to all of above land except Lot 3, Block 7 in Parcel 1; Lot 3, Block 7 in Parcel
3 and the above portion of Lot 9, Block 8 in Parcel 2; and except that part of
Lot 6, Block 7 and of that part of the Northwesterly 1/2 of vacated 12th Avenue
South in Parcel 1 lying Northeasterly of extensions across it of the
Southwesterly lien of said Lot 6 and its extension);

Subject to covenants, restrictions, reservations and conditions subsequent,
including a right of re-entry and forfeiture of title upon default as contained
in Deed Doc. No. 1488605; (See Inst)

                                     A-2-1
<PAGE>

                                    EXHIBIT B
                           ANTENNAE LICENSE AGREEMENT

            This License Agreement (the "Agreement"), dated as of this 3rd day
of March, 1999, is between TIMESHARE SYSTEMS, INC. (the "License") having an
address at 511 Eleventh Avenue South, Minneapolis, MN. 55415 and ADVANCED
TELECOMMUNICATIONS, INC. (the "Licensee"), having an address at 511 Eleventh
Avenue South, Minneapolis, MN. 55415 (the "Premises").

            A. Licensor agrees to permit Licensee to utilize for purposes
provided herein, the roof space (the exact location to be determined by Licensor
[with] the reasonable consent of Licensee, but in no event shall such space
exceed 100 contiguous square feet) on the building ("Building") in which the
Premises are located (the "Roof Space"), from the date hereof and expiring April
30, 2099. Upon termination of Licensee's lease for the Premises for any reason
(including the failure to renew the Term), this License Agreement and the
license created hereby shall automatically expire with said termination. The
termination, cancellation or expiration this License Agreement or the license
created hereunder shall not be cause or grounds for the cancellation or
termination of Licensee's lease for the Premises.

            H. Licensee may install, use and maintain on such Roof Space
equipment (" Equipment") as described in Exhibit A attached hereto. If requested
by Licensor, Licensee shall, at its sole expense, install a screening and
protective fence ("Fence") around the perimeter of the Roof Space. The Fence
style and installation shall be subject to Licensor's prior approval.

            I. Licensor agrees that Licensee may run cables (the "Cables")
between the Roof Space and the Licensee's Premises. Any damages to Building or
fixtures or equipment located upon or within the Building resulting therefrom
shall be promptly repaired by Licensee.

            J. The Equipment and Fence shall remain the property of the Licensee
or its contractor. Licensee shall at its cost remove such Equipment and Fence
(and if so requested by Licensor, the Cables) at the expiration or sooner
termination of the license granted hereunder or this License Agreement, and
restore Roof Space and Building to the condition they were in prior to
Licensee's installation of the Equipment, Fence and Cables. The obligations to
remove the Equipment, Fence and Cables and to restore and repair the Roof Space
and Building shall survive the expiration or sooner termination of the license
and this License Agreement.

            K. Licensee and/or its contractor shall bear all expenses in
connection with the installation, use and maintenance of such Equipment, Fence
and Cables and removal of the same. Licensee shall indemnify and hold Licensor
harmless from and against liability, damages, costs and expenses, including
reasonable attorneys' fees incurred by Licensor, arising out of Licensee's
installation, use, maintenance and removal of the Equipment, Fence and Cables.
This obligation shall survive the expiration, cancellation or termination of
this License Agreement and the license created hereunder.

            L. Licensee and/or its contractor shall maintain in force during the
term of this License Agreement comprehensive liability insurance in amount and
in such form as reasonably satisfactory to Licensor, protecting Licensor against
any liability, damages, cost or expenses, in connection with the installation,
use, maintenance and removal of the Equipment, Fence and Cables and shall supply
the appropriate certificates of such insurance upon request.

            M. Licensee and its contractors shall comply with all applicable
federal, state and local laws, regulations, and building codes in connection
with the installation, use, maintenance and removal of the Equipment, Fence and
Cables. In the event any such laws, regulations, or codes require physical
improvements made to the Building or other expenditures by or on behalf of the
Building and/or its owner, the costs of the same shall be borne by Licensee.
Notwithstanding the foregoing, any physical improvements, whether required by
law, regulation, code or otherwise, shall be subject to Licensor's approval,
which approval may be given or denied in Licensor's sole discretion. If any law,
regulation or code prohibits or disallows the Equipment, Fence and/or Cables or
the effective use of the license granted hereby, whether now or in the future,
Licensor shall be entitled to terminate the license granted hereby, without
penalty, and Licensee shall take such action so as to allow the Building to
again be in compliance with such law, regulation or code, including, if
necessary, the removal of the Equipment, Fence and/or Cables.

            N. Licensor agrees to permit Licensee reasonable access to the Roof
Space and other areas so as to facilitate the installation, use, maintenance and
removal of the Equipment, Fence, and Cables. Licensee shall have access to the
Roof Space on a 24 hour per day, 7 days per week basis, in order to facilitate
maintenance and repairs. Licensee agrees to sign the Building's log book on each
occasion Licensee enters the Roof Space, during normal business hours. At times
other than normal business hours, or when the log book is not available for
signing, Tenant shall page Landlord at 470-4500 or shall leave a message by
calling 481-9999 or shall notify Landlord by such other reasonable means as
Landlord shall inform Tenant in writing.

            O. Notwithstanding anything else contained herein to the contrary,
the license granted herein is subject to the non-interference of Licensee's
Equipment with the normal operation, functioning and use of any other equipment
(whether owned by Licensor or by other licensees and/or tenants of Licensor
currently existing upon the roof of the Building. In the event of any such
interference, Licensor may terminate the License granted hereunder if such
interference is not corrected within three (3) days notice from Licensor to
Licensee. Notwithstanding anything else contained herein to the contrary,
Licensor does not guaranty nor warrant the reception, noninterference or
effective use of Licensee's antenna, or Equipment, either at initial
installation nor thereafter.

            P. Licensee shall be required to get prior approval from Licensor
pertaining to the Antenna size, color, Fence specifications, location on roof,
method of mounting and the location of all Cables. In no instance shall this
installation breach or penetrate the roof membrane.

            Q. Any notice required or desired under this License Agreement shall
be deemed sufficiently given if given in compliance with the Licensee's lease
agreement for the Premises.

            R. Licensee shall pay to Licensor, without set-off, or demand the
sum of $0 per month for all Antennae (as listed on Exhibit A, or otherwise
located on the Building pursuant to this License Agreement or the license
created hereunder) for use of the roof space ("License Fee") during the Term of
this License Agreement. Failure by Licensee to pay said License Fee shall
entitle Licensor, upon 10 days written notice to Licensee, to terminate this
License Agreement and the license created hereunder, and to such other relief as
may be allowed by law or equity. No other Equipment or antennae shall be
permitted by this license, without Licensor's prior written consent, which
consent shall not be unreasonably withheld for a reasonable increase in
equipment, provided the License Fee shall be increased to Licensor's then rate
for each additional antennae.

            S. In the event of default by Licensee of any of the terms and
conditions set forth in this License Agreement, whether suit be commenced or not
Licensee agrees to pay the attorneys' fees, costs and expenses of Licensor
incurred in enforcing or attempting to enforce this License Agreement.

            T. Licensee shall operate the Licensee facilities in a manner that
will not cause interference to Licensor and other Licensees of the Property
provided that their installations predate that of the Licensee's facilities. All
operations by Licensee shall be in compliance with all Federal Communications
Commission ("FCC") requirements.

            U. Licensor waives any lien rights it may have concerning the
Equipment which are deemed Licensee's personal property and not fixtures, and
Licensee has the right to remove the same at any time without Licensor's
consent.

            V. This Agreement may be terminated without further liability on
thirty (30) days prior written notice as follows: (i) by either party upon a
default of any covenant or term hereof by the other party, which default is not
cured within sixty (60) days of receipt of written notice or default provided
that the grace period for any monetary default is ten (10) days from receipt of
notice; or (ii) by Licensee for any reason or for no reason, provided License
delivers written notice of early termination to Licensor with a thirty (30) day
notice provision prior to termination; or (iii) by Licensee if it does not
obtain or maintain any license, permit or other approval necessary for the
construction and operation of the Equipment; or (iv) by Licensee if Licensee is
unable to occupy and utilize the Premises under Licensee's lease due to an
action of the FCC, including without limitation, a take back of channels or
change in frequencies; or (v) by Licensee if Licensee determines that the
Premises are not appropriate for its operations for technological reasons,
including, without limitation, signal interference.

                                       B-1
<PAGE>

            W. If the Premises or Equipment are damaged, destroyed, condemned or
transferred in lieu of condemnation, Licensee may elect to terminate this
Agreement as of the date of the damage, destruction, condemnation or transfer in
lieu of condemnation by giving notice to Licensor no more than forty-five (45)
days following the date of such damage, destruction, condemnation or transfer in
lieu of condemnation.

            X. Licensee may not assign, or otherwise transfer all or any part of
its interest in this Agreement without the prior written consent of Licensor
provided, however, that Licensee may assign its interest to any party to which
it is assigning its interest in the Premises under its lease

            Y. Licensor shall be responsible for compliance with all marking and
lighting requirements of the Federal Aviation Administration ("FAA") and the
FCC. Should Licensee be cited because the Property is not in compliance and,
should Licensor fail to cure the conditions of noncompliance, Licensee may
either terminate this Agreement or proceed to cure the conditions of
noncompliance at Licensor's expense, which accounts may be deducted from the
rent under Licensee's lease.

            Z. In no event shall Licensee be entitled to erect any mono pole or
other tower-type structure.

            U. In the event the Equipment, Fence and/or Cables should interfere
with any roof maintenance, repair and/or replacement which Licensor deems
necessary to perform, Licensor shall first notify Licensee and then Licensee
shall cooperate with Licensor and its contractors to remove such interference,
including if necessary, the relocation and/or temporary relocation of the
Equipment, Fence and/or Cables. Such cooperation including such relocations
and/or temporary relocations shall be at the cost and expense of Licensee.

                                    LICENSOR:
                                    TIMESHARE SYSTEMS, INC.

                                    By: /s/ [Illegible]
                                        ---------------------------------------
                                    Its:          PRES.
                                        ---------------------------------------
                                                  3/30/99

                                    LICENSEE:
                                    ADVANCED TELECOMMUNICATIONS, INC.

                                    By: /s/ [Illegible]      3/30/99
                                        ---------------------------------------
                                    Its: Chief Financial Officer
                                        ---------------------------------------

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

                    EXHIBIT A TO ANTENNAE LICENSE AGREEMENT

Up to one (1) antenna as well as related base site cabinets and any other
appropriate ancillary equipment so long as it is contained within 100 square
feet of roof space and does not exceed 10 feet in height. No additional antennae
may be installed without Landlord's written consent.

                                      B-2
<PAGE>

                                [CHECK OMITTED]

[Photocopy of endorsed check payed to order of TIMESHARE SYSTEMS, INC. in the
amount of $10,000.00 as a deposit drawn on ADVANCED TELECOMMUNICATIONS, INC.
account at NORWEST BANK MINNESOTA, N.A. dated 2/19/99]
<PAGE>

                  [Business card of Basant Kharbanda omitted]
<PAGE>

                                    EXHIBIT C
                                LICENSE AGREEMENT
                          MINNEAPOLIS TECHNOLOGY CENTER
                          WEST PARKING LOT (UNASSIGNED)

            This License Agreement is made as of the 3rd day of March, 1999, by
and between TIMESHARE SYSTEMS, INC., a Minnesota corporate ("Licensor") and
ADVANCED TELECOMMUNICATIONS, INC. ("Licensee"),

            In consideration of the covenants and agreements contained herein,
and other good and valuable consideration, receipt and sufficiency of which
acknowledged, Licensor and Licensee mutually agree as follows:

            A. GRANT: Licensor hereby grants to Licensee, for the sole purpose
of parking the automobile(s) described in Licensee's application attach hereto,
_________________________ (_____) unassigned parking space(s) in the restricted
parking areas of the West parking lot ("Lot") located at Minneapolis Technology
Center, 511 South Eleventh Avenue South, Minneapolis, Minnesota.

            2. TERM: The term of this License commences this date amid expires
at Midnight April 30, 2099.

            3. LICENSE FEE: Licensee shall pay as its fee for this License the
sum of $95 per admittance card on or before the first day of each month
Timeshare Systems, Inc., 511 South Eleventh Avenue South, Minneapolis,
Minnesota, 55415, or at such other address that Licensor may designate; together
with all use, sales or other tax (excepting income tax) payable or which may
become payable by Licensor as a result of said fee. In the event the term of
this License commence on other than the first day of the month, the fee will be
prorated for such month. The license fee shall commence on the date Licensor
delivers a Lot gate operator(s) admittance card(s) to Licensee. The license fee
shall terminate on the expiration date of the license or on the date the
Licensee returns the Lot gate operator(s) and admittance card(s) whichever
occurs last. The fee for this License may be adjusted from time to time
beginning January 1, 2000 to whatever fee Licensor is then charging for Lot
parking stalls; provided that Licensor shall give thirty (30) days prior written
notice of any such increase and Licensee may, within thirty (30) days subsequent
to any such increase, terminate this License by giving ten (10) days written
notice to Licensor.

            4. NEGATIVE COVENANTS: Licensee shall not:

                  a)    Park more than one (1) standard sized (or smaller)
                        automobile per admittance card in the Lot, at any one
                        time.

                  b)    Allow any non-authorized automobile to be parked in the
                        Lot through use of License's issued admittance card.

                  c)    Allow any automobile to be stored overnight in the Lot.

            Upon breach of any covenant set forth in this Paragraph 4 by
Licensee, Licensor may, at its option, and in addition to Licensor's remedies
provided in paragraph 5 hereof, charge Licensee the sum of $25.00 for each day
of any such violation, and/or may tow or have towed any automobile which is
parked in violation of any covenant set forth in this paragraph 4, and in such
case Licensee agrees to pay Licensor as an additional license fee hereunder all
towing and storage cost associated with said towing.

            5. RIGHT OF RE-ENTRY AND EXPIRATION: Licensee agrees that this
License is made upon the condition that if the License shall fail to pay the
license fee within ten (10) days of when due, fail to keep any term or condition
of this license, or shall neglect or fail to keep, observe and perform any of
the rules and regulations from time to time adopted and promulgated by Licensor
for the operation of the Lot, then in any of said cases the Licensor may
immediately or a any time thereafter and without notice or demand, retake
possession of the parking stall(s), without such re-taking working a forfeiture
of the license fee to be paid by Licensee for the full term of this License. In
the event of such retaking or at the end of the Term, Licensee agrees to return
to Licensor any and all Lot gate operator(s) and/or admittance cards, upon
notice from Licensor. Licensee shall pay to Licensor, Licensor's
replacement/lost fee for all such operator(s) and/or admittance cards not
returned.

            6. PARKING LOT OPERATION: It is specifically understood and agreed
that the Lot area is operated without constant staffing and that Licensor shall
not be responsible for any loss, damage or casualty sustained by Licensee's
automobile or for the loss of any articles, personal property or any such other
items from Licensee's automobile.

            7. OFFICE LEASE: Licensee presently has (or is contemporaneously
executing) a lease for office space within the Minneapolis Technology Center
("Office Lease").

                  a) A termination of the Office Lease, whether by expiration of
            the term or otherwise, shall automatically constitute a termination
            of this License Agreement.

            8. AUTHORIZED VEHICLES: Licensee agrees, upon request from Licensor,
to furnish Licensor or its authorized agent, the state automobile license
number(s) assigned to those automobile(s) of those persons employed on the
premises and who are designated by Licensee to use the Lot. Any such designation
shall not exceed the number of stalls licensed hereunder. If any automobile of
Licensee or of Licensee's officers, agents or employees who is not designated to
park in the Lot is parked therein, then Licensee shall pay to Licensor an amount
equal to $25 per day for each such vehicle for each day, or a part thereof, such
amount to be due and payable by Licensee within three (3) days after demand
therefor.

            9. CANCELLATION: Licensor shall have the right, upon thirty (30)
days prior written notice to Licensee, to cancel this License Agreement and
allow the Parking Lot to be used on an unrestricted basis for all tenants and
their invitees. Licensee from and after the cancellation date specified in such
written notice, shall have no further obligation for the payment of the fee
hereunder but the use of such Parking Lot shall be subject to the terms of
paragraphs 4(c), 6 and 7 hereof.

            10. LICENSE HOURS: Notwithstanding anything else contained herein to
the contrary, the license granted hereunder shall be limited to the following
hours: Monday through Friday (legal holidays specifically excluded) from 7:00
a.m. to 6:00 p.m. Licensee specifically agrees that should Licensee violate the
foregoing hours during a time period in which there is an event ("Event") at the
Hubert H. Humphrey Metrodome (located across 11th Avenue from the Minneapolis
Technology Center) Licensee shall pay to Licensor $25.00 for each such Event
violation (or such higher rate which Licensor may then be charging for dome
Event parking).

(LICENSEE)                                  (LICENSOR)
ADVANCED TELECOMMUNICATIONS , INC.              TIMESHARE SYSTEMS, INC.

By /s/ [Illegible]                            By /s/ [Illegible]
  -----------------------------------           --------------------------------
  Its   Chief Financial Officer                 Its PRES.
     --------------------------------              -----------------------------
Date: 3/30/99                                 Date: 3/30/99
     --------------------------------              -----------------------------

                                      C-1
<PAGE>

                                    EXHIBIT D

                              RULES AND REGULATIONS

            1. No sign, placard, picture, advertisement, name or notice shall be
installed or displayed on any part of the outside or inside of the Building
without the prior written consent of the Landlord. Landlord shall have the right
to remove, at Tenant's expense and without notice, any sign installed or
displayed violation of this rule. All approved signs or lettering on doors and
walls shall be printed, painted, affixed or inscribed at the expense of Tenant
by a person or vendor chosen by Landlord. In addition, Landlord reserves the
right to change from time to time the format of the signs or lettering and to
require previously approved signs [ILLEGIBLE] lettering to be appropriately
altered.

            2. If Landlord objects in writing to any curtains, blinds, shades or
screens attached to or hung in or used in connection with any window or doors of
the Premises, Tenant shall immediately discontinue such use. No awning shall be
permitted on any part of the Premises. Tenant shall not place anything or allow
anything to be placed against or near any glass partitions or doors or windows
which may appear unsightly, in the opinion of Landlord, from outside the
Premises.

            3. Tenant shall not obstruct any sidewalks, halls, passages, exits,
entrances, elevators, escalators or stairways of the Building. The halls,
passages, exits, entrances, shopping malls, elevators, escalators and stairways
are not for the general public, and Landlord shall in all cases retain the right
to control and prevent access to the Building of all persons whose presence in
the judgment of Landlord would be prejudicial to the safety, character,
reputation and interests of the Building and its tenants provided that nothing
contained in this rule shall be construed to prevent such access to persons with
whom any tenant normally deals in the ordinary course of its business, unless
such persons are engaged in illegal activities. No tenant and no employee or
invitee or any tenant shall go upon the roof of the Building.

            4. The directory of the Building will be provided exclusively for
the display of the name and location of tenants only and Landlord reserves the
right to exclude any other names therefrom.

            5. Tenant shall not cause any unnecessary labor by carelessness or
indifference to the good order and cleanliness of the Premises. Landlord shall
not in any way be responsible to any Tenant for any loss of property on the
Premises, however occurring, or for any damage to any Tenant's property by the
janitor or any other employee or any other person.

            6. Landlord will furnish Tenant free of charge with two keys to each
door in the Premises. Landlord may make a reasonable charge for any additional
keys, and Tenant shall not make or have made additional keys, and Tenant shall
not alter any lock or install a new or additional lock or bolt on any door of
its Premises. Tenant, upon the termination of its tenancy, shall deliver to
Landlord the keys of all doors which have been furnished to Tenant, and in the
event of loss of any keys so furnished, shall pay Landlord therefor.

            7. If Tenant requires telegraphic, telephonic, burglar alarm or
similar services, it shall first obtain, and comply with, Landlord's
instructions in their installation.

            8. No equipment, materials, furniture, packages, supplies,
merchandise or other property will be received in the Building or carried in the
elevators except between such hours and in such elevators as may be designated
by Landlord.

            9. Tenant shall obtain Landlord's consent prior to placing a load
upon any floor which may exceed the load per square foot which such floor was
designed to carry and which is allowed by law. Landlord shall have the right to
prescribed the weight, size and a position to all equipment, materials,
furniture or other property brought into the Building. Heavy objects shall stand
on such platforms as determined by Landlord to be necessary to properly
distribute the weight. Business machines and mechanical equipment belonging to
Tenant which cause noise or vibration that may be transmitted to the structure
of the Building or to any space in the Building to such a degree as to be
objectionable to Landlord or to any tenant shall be placed and maintained by
Tenant, as Tenant's expense on vibration eliminators or other devices sufficient
to eliminate noise or vibration. The persons employed to move such equipment in
or out of the Building must be acceptable to Landlord. Landlord will not be
responsible for loss of, or damage to, any such equipment or other property from
any cause, and all damage done to the Building by maintaining or moving such
equipment or other property shall be repaired at the expense of Tenant.

            10. Tenant shall waste electricity, water or air conditioning.
Tenant shall keep corridor doors closed.

            11. Landlord reserves the right to exclude from the Building between
the hours of 6 p.m. and 7 a.m. the following day, or such other hours as may be
established from time to time by Landlord, and on Sundays and legal holidays any
person unless that person is known to the person or employee in charge of the
Building as being an employee of Tenant and has a pass or is properly
identified. Tenant shall be responsible for all persons for whom it requests
passes and shall be liable to Landlord for all acts of such persons. Landlord
shall not be liable for damages for any error with regard to the admission to or
exclusion from the Building of any person.

            12. Tenant shall close and lock the doors of its Premises and
entirely shut off all water faucets or other water apparatus and electricity,
gas or air outlets before Tenant and its employees leave the Premises. Tenant
shall be responsible for any damage or injuries sustained by other tenants or
occupants of the Building or by Landlord for noncompliance with this rule.

            13. The toilet rooms, toilets, urinals wash bowls and other
apparatus shall not be used for any purpose other than that for which they were
constructed, no foreign substance of any kind whatsoever shall be thrown into
any of them, and the expense of any breakage, stoppage or damage resulting from
the violation of this rule shall be borne by the Tenant who, or whose employees
or invitees, shall have caused it.

            14. Tenant shall not install any radio or television antenna,
satellite dish, loudspeaker or other device on the roof or exterior walls of the
Building except by virtue of a separate license negotiated with Landlord. Tenant
shall not interfere with radio or television broadcasting or reception from or
in the Building or elsewhere.

            15. Except as approved by Landlord, Tenant shall not mark, drive
nails, screw or drill into the partitions, woodwork or plaster or in any way
deface the Premises. Tenant shall not cut or bore holes for wires. Tenant shall
not affix any floor covering to the floor of the Premises in any manner except
as approved by Landlord. Tenant shall repair any damage resulting from
noncompliance with this rule.

            16. No animals are allowed in the Building with the exception of
seeing-eye or hearing animals. In the event any injuries are caused to Tenant's
employees or invitees, the owner of said animal agrees to indemnify and hold the
Landlord and its managing agent and all other tenants harmless from all costs
(including reasonable attorney's fees) with respect to the presence of any
animals in the Building.

            17. Tenant shall store all its trash and garbage within its
Premises. Tenant shall not place in any trash box or receptacle any material
which cannot be disposed of in the ordinary and customary manner of trash and
garbage disposal. All garbage and refuse disposal shall be made in accordance
with directions issued from time to time by Landlord.

            18. No cooking shall be done or permitted by any Tenant on the
Premises, except by the Tenant of Underwriters' Laboratory approved microwave
oven or equipment for brewing coffee, tea, hot chocolate and similar beverages
shall be permitted provided that such equipment and use is in accordance with
all applicable federal, state and city laws, codes, ordinances, rules and
regulations.

            19. Tenant shall not use in any space or in the public halls of the
Building any hand trucks except those equipped with the rubber tires and side
guards or such other material-handling equipment as Landlord may approve. Tenant
shall not bring any other vehicles of any kind into the Building.

                                      D-1
<PAGE>

            20. Tenant shall not use the name of the Building in connection with
or in promoting or advertising the business of Tenant except as Tenant address.

            21. The requirements of Tenant will be attended to only upon
appropriate application to the office of the Building by an authorized
individual. Employees of Landlord shall not perform any work or do anything
outside of their regular duties unless under special instruction from Landlord,
and no employee [ILLEGIBLE] Landlord will admit any person (Tenant or otherwise)
to any office without specific instructions from Landlord.

            22. Parking is allowed between the hours of 7:00 a.m. to 6:00 p.m.,
Monday through Friday, holidays excepted, in the east parking lot [ILLEGIBLE]
subject to availability and at such rates as Landlord is then charging.
Notwithstanding the foregoing, no parking is allowed during professional
sporting events and other events occurring at the Hubert H. Humphrey Metrodome
located at across 11th Avenue South from the Building. All visitors to the
Building parking in such parking lot shall pay the then prevailing parking
charges. Any visitor drop-offs are allowed only on the east side of the
Building. Notwithstanding the foregoing, parking by Tenant pursuant to a
specific license agreement shall be 24 hours per day, 7 days a week.

            23. Landlord may waive any one or more of these Rules and
Regulations for the benefit of any particular tenant or tenants, but no such
waiver [ILLEGIBLE] Landlord shall be construed as a waiver of such Rules and
Regulations in favor of any other tenant or tenants, nor prevent Landlord from
thereafter enforcing any such Rules and Regulations against any or all of the
tenants of the Building. The foregoing shall not be construed to allow Landlord
to discriminatorily enforce these Rules and Regulations as against Tenant and
not other tenants of the Building.

            24. These Rules and Regulations are in addition to, and shall not be
construed to in any way modify or amend, in whole or in part, the terms,
covenants, agreements and conditions of any lease of premises in the Building.

            25. Landlord reserves the right to make such other and reasonable
rules and regulations as in its judgment may from time to time be needed for
safety and security, for care and cleanliness of the Building and for the
preservation of good order in and about the Building. Tenant agrees to abide by
all such rules and regulations which are adopted.

            26. Tenant shall be responsible for the observance of all of the
foregoing rules by Tenant's employees, agents, clients, customers, invitees and
guests.

                                      D-2
<PAGE>

                                    EXHIBIT E

                    LICENSE AGREEMENT TO USE BUILDING CHILLER

            This License Agreement (the "Agreement"), entered into as of the 3rd
day of March, 1999, is between TIMESHARE SYSTEMS, INC., a Minnesota corporation
(the "Licensor"), having an address at 511 Eleventh Avenue South, Minneapolis,
Minnesota 55415 and Advanced Telecommunications Inc. (the "Licensee"), having an
address at Suite 409, 511 Eleventh Avenue South, Minneapolis, Minnesota 55415
(the "Premises"), with a notice address at 730 2nd Avenue South, Suite 1200,
Minneapolis, MN. 55402.

            1. Licensor agrees to permit Licensee to utilize for purposes
provided herein one of the chiller systems (as designated by Licensor) together
with associated plumbing and electrical and mechanical controls (the "Chiller"),
which are located on and at the building ("Building") in which the Premises are
located. This license shall be subject to automatic termination in the event
Licensee's lease for the Premises dated March 3rd, 1999 ("Lease") is terminated
or canceled, but otherwise the term of this Agreement shall be the same as the
Lease. Upon termination of Licensee's Lease for any reason, this License
Agreement and the license created hereby shall automatically expire with said
termination. The termination, cancellation or expiration of this License
Agreement shall not be cause or grounds for the cancellation or termination of
Licensee's Lease.

            2. Licensee may use the Chiller for purposes of cooling Licensee's
telecommunication and other related equipment ("Equipment"). Licensee
acknowledges that the license to utilize the Chiller is non-exclusive. This
Agreement and the license granted hereby is specifically limited to Licensee's
utilization of not more than 50 tons of the Chiller's capacity. Licensor, from
time to time may provide such 50 tons of cooling capacity by any one of the
Building's chillers, but the fees and other obligations hereunder shall continue
to be applicable nonetheless.

            3. Licensor agrees that Licensee may run utility lines (the
"Cables") between the Chiller and the Premises. Any damages to the Building or
fixtures or equipment located upon or within the Building resulting therefrom
shall be promptly repaired by Licensee.

            4. The Chiller shall remain the property of Licensor and any
improvements made to the Chiller shall likewise become the property of Licensor.
Licensee acknowledges that Licensor makes no representations or warranties as to
the condition, fitness or purpose for which Licensee intends to use the Chiller.
Licensee acknowledges and agrees that its use of the Chiller shall be in its
current "AS-IS" condition. This License shall extend to any maintenance or
improvements Licensee may desire and need to make to the Chiller, providing
however, Licensee shall use a contractor authorized and approved by Licensor
("Authorized Contractor") and Licensee obtains Licensor's prior written consent.
No work or maintenance shall be performed on the Chiller except by an Authorized
Contractor, nor without the express written consent of Licensor.

            5. For purposes of this License Agreement Licensee's "Pro Rata
Share" shall be equal to 20.8% and assumes the Chiller to which Licensee shall
be connected shall have an approximately 240 rated capacity. If the Chiller to
which Licensee has a different rated capacity, then Licensee's Pro Rata Share
shall be adjusted accordingly.

            6. Licensee shall bear all expenses in connection with its use and
maintenance of the Chiller, including: i) Licensee's Pro Rata Share of periodic
maintenance costs (no less frequently than quarterly plus an annual preventative
maintenance inspection by an Authorized Contractor) for the Chiller, including
any repairs, whether or not such repairs involve what may be typically
considered capital items, but not including capital improvements or similar
capital additions; ii) the "User Fee" (as defined in paragraph 7 below); and iv)
the "Utility Fee" (as defined in paragraph 8 below). The foregoing maintenance
costs shall specifically include any up-grades and/or capital costs required or
mandated by any governmental authority, law, rule or regulation.

            7. Licensee shall pay to Licensor a monthly "User Fee" to compensate
Licensor for a share of the supervision costs for approximately one (1) hour
daily by the Building's facility maintenance person for daily logging,
adjusting, switching and for maintaining the cooling tower water and other costs
associated with the use, capital investment and operation of the Chiller. The
User Fee shall be Licensee's Pro Rata Share of such costs (said costs initially
being $5,400 and Licensee's initial Pro Rata Share shall initially be $1123 per
month), but said User Fee shall be adjusted upward in the amount of 3% annually,
on each anniversary date of this Agreement. Licensee acknowledges the costs to
connect the Premises to the Chiller shall be borne by Licensee and are not part
of any of the fees referred to elsewhere in this License Agreement. The User Fee
shall not commence until the Premises are actually connected to the Chiller and
being utilized (the "Effective Date").

            8. Commencing with the Effective Date, Licensee agrees to pay to
Licensor at the rate of $1950 per month ("Utility Fee"), which represents
Licensee's Pro Rata Share of Licensor's electrical utility usage of
approximately $9375 per month for electrical consumption by the Chiller, cooling
tower, cooling tower pumps, etc., such Utility Fee to be prorated for any
partial calendar month, and to be adjusted after each calendar year (up or down)
at the same average rate as Landlord's average electrical rates change from year
to year. In the event, whether through more efficient equipment upgrades,
changes in electrical rates or otherwise, it can be shown that the overall
utility costs to operate the Chiller differs from the estimated $9375 per month
("Adjusted Utility Costs"), then Tenant's Utility Fee shall be adjusted to its
Pro Rata Share of the Adjusted Utility Costs. Landlord shall provide to Tenant
all reports and other back-up supporting any adjustments to the Utility Fee.

            9. Prior to the Effective Date Licensee agrees to pay to Licensor a
one time "Start-Up Fee" of $10,000, representing a portion of the
"upgrade/start-up" and accessory costs which were necessary to put the Chiller
into operational condition ("Start Up Costs").

            10. Licensee's contractor shall maintain in force during the term of
this License Agreement comprehensive liability insurance in amounts and in such
form as reasonably satisfactory to Licensor, protecting Licensor against any
liability, damages, cost or expenses, in connection with the maintenance and
alteration of the Chiller and Cables and shall supply the appropriate
certificates of such insurance upon request.

            11. Licensee and its contractors shall comply with all applicable
federal, state and local laws, regulations, and building codes in connection
with the use, maintenance and alteration of the Chiller and Cables. In the event
any such laws, regulations, or codes requires physical improvements be made to
the Building or other expenditures by or on behalf of the Building and/or its
owner, the costs of the same shall be borne by Licensee. Notwithstanding the
foregoing, any physical improvements, whether required by law, regulation, code
or otherwise, shall be subject to Licensor's approval, which approval may be
given or denied in Licensor's sole discretion. If any law, regulation or code
prohibits or disallows the Chiller and/or Cables or the effective use of the
license granted hereby, whether now or in the future, Licensor shall be entitled
to terminate the license granted hereby, without penalty; and Licensee shall
take such action so as to allow the Building to again be in compliance with such
law, regulation or code, including, if necessary, the removal of Cables;
provided however, Licensor agrees to cooperate, without cost to Licensor, with
Licensee's efforts to comply with such laws, regulation or codes, including any
legal challenges thereto. Licensee shall have the right to challenge, at
Licensee's sole cost, any governmental requirement imposed or sought to be
imposed with respect to the Chiller during the term of this Agreement and in
connection therewith, to delay compliance with such requirements until
resolution of the contest or challenge; provide that neither Licensor nor the
Building is subject to the risk of any fine, penalty, cost, lien or forfeiture
during such contest.

            12. Licensor agrees to permit Licensee reasonable access to the
Chiller and other areas so as to facilitate the use, maintenance and alterations
of the Chiller and Cables. Licensee shall indemnify and hold Licensor harmless
from and against liability, damages, costs and expenses, including reasonable
attorneys' fees incurred by Licensor, arising out of Licensee's use, maintenance
and alterations of the Chiller and Cables, except if due to the negligence or
willful misconduct of Licensor. This obligation shall survive the expiration,
cancellation or termination of this License Agreement and the license created
hereunder.

            13. Any notice required or desired under this License Agreement
shall be deemed sufficiently given if given in compliance with the Licensee's
Lease.

                                      E-1
<PAGE>

            14. In the event of default by either Licensor or Licensee of any of
the terms and conditions set forth in this License Agreement, whether suit be
commenced or not, the defaulting party agrees to pay the reasonable attorneys
fees, costs and expenses of the non-defaulting party incurred in enforcing or
attempting enforce this License Agreement.

            15. If the Licensor is in default of any of its obligation to
provide services or maintain the Chiller as specified in this Agreement,
Licensee shall notify Licensor that Licensee is dissatisfied with the services
and/or maintenance so to be provided and, if following such notice, the same
shall not have been cured to Licensee's reasonable satisfaction within thirty
(30) days of such notice, then Licensee shall have the right to assume on the
expiration of such 30 day period the obligation to so provide the services
and/or maintenance. During the period that Licensee is performing Licensor's
obligations, Licensee shall be entitled to a credit against the User Fee
otherwise due hereunder equal to the actual cost of such service and/or
maintenance.

            16. Licensor's right to assign this License Agreement is and shall
remain unqualified upon any sale or transfer of the Building and provided the
purchaser succeeds to the interests of Licensor and assumes all obligations of
Licensor hereunder, Licensor shall thereupon be entirely free of all obligations
of the Licensor hereunder and shall not be subject to any liability resulting
from any act or omission or event occurring after such conveyance.

(LICENSEE)                                  (LICENSOR)
ADVANCED TELECOMMUNICATIONS , INC.              TIMESHARE SYSTEMS, INC.

By /s/ [Illegible]                            By /s/ [Illegible]
  -----------------------------------           --------------------------------
  Its   Chief Financial Officer                 Its PRES.
     --------------------------------              -----------------------------
Date: 3/30/99                                 Date: 3/30/99
     --------------------------------              -----------------------------

                                      E-2
<PAGE>
                     STANDARD OFFICE LEASE AGREEMENT (GROSS)

THIS LEASE AGREEMENT (hereinafter called the "Lease Agreement") made as of the
24th day of July, 1997, by and between TIMESHARE SYSTEMS, INC., a Minnesota
corporation, having offices at 511 Eleventh Avenue South, Minneapolis,
Minnesota, 55415 (hereafter called the "Landlord"), and Frontier Local Services,
Inc., a ______________ corporation (hereafter called the "Tenant").

                                   WITNESSETH

      FOR AND IN CONSIDERATION of the sum of One Dollar ($1.00) in hand paid by
each of the parties to the other, and other good and valuable consideration,
receipt and sufficiency of which is hereby acknowledged, Landlord does hereby
lease and let unto Tenant, and Tenant does hereby hire, lease and take from
Landlord, that area outlined in red on Exhibit A-1 attached hereto, and by this
reference incorporated herein, and described as Suite ____, containing
approximately _____ rentable square feet, (hereafter called the "Premises") at
511 11th Avenue South (hereafter called the "Building") in the City of
Minneapolis, County of Hennepin, State of Minnesota. The term Building as it is
used herein shall consist of the land and building(s) set forth in Exhibit A-2
hereto. The Premises area shall be measured from the outside of exterior or
corridor walls and from the center of demising walls to obtain the useable area
of the Premises, which shall be multiplied by a factor of 1.15 to arrive at the
rentable area of the Premises. The parties may measure the Premises at any time,
but unless the rentable area differs by more or less than 10% the rental amounts
set forth below shall not be adjusted.

ARTICLE I - TERM

      A. To have and to hold said Premises for a term of ten (10) years,
commencing upon the earlier of: i) October 1, 1997; or ii) the date on which
Tenant occupies any portion of the Premises for the conduct of its business; and
terminating on the last day of the month during which the tenth (10th)
anniversary of the commencement date occurs (hereafter called the "Term") upon
the rentals and subject to the conditions set forth in this Lease Agreement, and
the Exhibits attached hereto. The commencement and termination dates are
specifically subject to the provisions of Article 5 hereof.

      B. Tenant shall have the right to renew the Term of the Lease Agreement
for two (2) periods of five (5) years each ("Renewal Term(s)"), subject to the
following terms, covenants and conditions: i) Tenant shall not be in default
beyond any applicable grace period in the performance of any of the terms,
covenants or conditions of this Lease Agreement, either at the time of the
exercise of the right to renew or at the commencement of the applicable Renewal
Term; ii) the Renewal Term(s) shall be on the same terms, covenants and
conditions as provided in this Lease Agreement, except the Minimum Rental during
the Renewal Term shall be at the rates as set forth in the table in Paragraph 3B
and there shall be no further renewal right after the commencement of the second
Renewal Term; and iii) Tenant shall exercise its right to renew by giving
written notice thereof to Landlord at least nine (9) calendar months prior to
the expiration of the initial Term or first Renewal Term, as the case may be,
time being of the essence. If Tenant fails to notify Landlord in the manner and
within the time as provided in this paragraph, Tenant's right to renew this
Lease Agreement shall expire and become null and void. If Tenant fails to
exercise the first Renewal Term, then the following Renewal Term shall also
terminate.

ARTICLE 2 - USE

      A. The Premises shall be used by the Tenant solely for the following
purposes: General office purposes, including executive corporate and general
offices; in addition Tenant shall be entitled, subject to obtaining such
approvals as may be required from any governmental authorities which may have
jurisdiction thereof, to install, operate and maintain telecommunications
equipment, including telecommunications switching operations and related
facilities utilized in connection with Tenant's telecommunication business. No
other use of the Premises shall be permitted or allowed.

      B. Landlord acknowledges that in connection with Tenant's use of the
Premises, it shall be installing specialized telecommunication equipment, and
various electrical equipment and facilities associated therewith
("Telecommunications Equipment"). Tenant shall be solely responsible for
ensuring that the Telecommunications Equipment can be operated consistent with
Landlord's current facilities and utilities and Tenant shall be solely
responsible for any special utility requirements created by the
Telecommunications Equipment (such as, but not limited to: all electrical power
utilized thereby, additional cooling requirements, uninterrupted power sources,
etc.) the installation of which shall be governed by Article 4 below. Tenant
shall also be solely responsible to ensure that any electrical/magnetic field
("EMF") is not emitted beyond the Premises at levels exceeding those acceptable
by the Food and Drug Administration for persons with pacemakers or other
electronic prosthetics (5 goss or 5,000 milligoss). In all events, Tenant shall
indemnify, defend with counsel of Landlord's selection, and save Landlord
harmless from any claim for injury to a person or damage to property asserted by
any person against Landlord, its agents or employees by reason of any EMF
emitted from or created by the Telecommunications Equipment. In addition, Tenant
hereby assumes all risk in connection with the presence of all EMF within the
Premises and hereby releases Landlord from any and all liability or
responsibility to Tenant, its agents, employees, contractors or anyone claiming
through or under Tenant by way of subrogation or otherwise for the loss or
damage to property or injury to persons arising out of or relating to EMF.

        C. Tenant and its "Affiliates" (as defined in Article 15 below) shall
have the right to provide telecommunication services to other tenants in the
Building on a non-exclusive basis with other providers of such services;
provided all such tenants shall be able to freely choose their
telecommunications provider, and Tenant shall not solicit such tenants (in
person) except with Landlord's prior approval.

ARTICLE 3 - RENTALS

      A. Tenant agrees to pay to Landlord as minimum rental (hereinafter called
"Minimum Rental") for the Premises, without notice set-off or demand, monthly
installments during the Term, and if properly exercised, each of the four
Renewal Terms, all as set forth in the table in Paragraph 3B below; said monthly
installments to be due and payable by Tenant in advance on the first day of each
calendar month during the Term of this Lease Agreement, or any extension or
renewal thereof, at the office of Landlord set forth in the preamble to this
Lease Agreement or at such other place us Landlord may designate. In the event
of any fractional calendar month, Tenant shall pay for each day in such partial
month a rental equal to 1/30 of the Minimum Rental. Tenant agrees to pay, as
Additional Rent, which shall be collectible to the same extent as Minimum
Rental, all amounts which may become due to Landlord hereunder and any tax,
charge or fee that may be levied, assessed or imposed upon or measured by the
rents reserved hereunder by any governmental authority acting under any present
or future law before any fine, penalty, interest or costs may be added thereto
for non-payment. Notwithstanding anything contained herein to the contrary, upon
the execution by Tenant of this Lease Agreement, Tenant shall pay to Landlord
$_______ which sum shall be held as a security deposit pursuant to Article 28,
below.

      B. The scheduled Minimum Rentals to be paid by Tenant are as follows:
<TABLE>
<CAPTION>
     =========================================================================================
                                                     Per Annum Minimum
                                                        Rental Rate
                      Time Period                   per Rentable Square   Monthly Minimum Rent
                                                       Foot of Area
                                                   Contained within the
                                                         Premises
     -----------------------------------------------------------------------------------------
     <S>                                                   <C>                   <C>
     Commencement  Date until  second  anniversary         $___                  $___
     thereof
     -----------------------------------------------------------------------------------------
     second  anniversary  of Term until the fourth         $___                  $___
     anniversary
     -----------------------------------------------------------------------------------------
     fourth  anniversary  of Term  until the sixth         $___                  $___
     anniversary
     -----------------------------------------------------------------------------------------
     sixth  anniversary  of Term  until the eighth         $___                  $___
     anniversary
     -----------------------------------------------------------------------------------------
     eighth  anniversary  of Term  until the tenth         $___                  $___
     anniversary
     -----------------------------------------------------------------------------------------
     First Renewal Term, if applicable,  until the         $___                  $___
     twelfth anniversary
     -----------------------------------------------------------------------------------------
     twelfth   anniversary   of  Term   until  the         $___                  $___
     fourteenth anniversary
     -----------------------------------------------------------------------------------------
     fourteenth  anniversary  of  Term  until  the         $___                  $___
     fifteenth anniversary
     -----------------------------------------------------------------------------------------
     Second  Renewal  Term, if  applicable,  until         $___                  $___
     the sixteenth anniversary
     -----------------------------------------------------------------------------------------
     sixteenth   anniversary  of  Term  until  the         $___                  $___
     eighteenth anniversary
     -----------------------------------------------------------------------------------------
     eighteenth  anniversary of Term until the end         $___                  $___
     of the Second Renewal Term
     =========================================================================================
</TABLE>

ARTICLE 4 - CONSTRUCTION

      A. Tenant has provided or shall provide Landlord with plans and/or a
description for permanent improvements to modify the Premises to accommodate
Tenant's intended use (hereafter called the "Preliminary Plans"), which
Preliminary Plans are subject to Landlord's approval, which approval shall not
be unreasonably withheld or delayed. Subject to the further written approval of
Landlord, which approval also shall not be unreasonably withheld or delayed,
Tenant shall make such modifications to the Preliminary Plans as it shall
require (hereafter called the "Final Plans"). The Final Plans shall be deemed
approved by Landlord if Landlord fails to make objections thereto within the
later of five (5) days of receipt of such Final Plans from Tenant or the date of
execution of this Lease Agreement. Tenant agrees to make its architect and
engineers available to Landlord for purposes of responding to questions of
Landlord regarding the Preliminary and Final Plans and their impact upon the
Building. Upon receipt of the Final Plans, Tenant shall obtain bids from the
various contractors and subcontractors needed to perform the work contemplated
by the Final Plans ("Work"). The general contractor or construction manager and
major subcontractors contemplated by Tenant shall be first approved by Landlord,
which approval shall not be unreasonably withheld or delayed, Tenant shall
furnish to the Landlord a written statement certified by Tenant and the general
contractor who shall perform the Work listing all subcontractors and suppliers
regarding the Work. Upon submission of such certification, Tenant shall have the
right and license to enter the Premises to do the Work, subject to all the
provisions of this Lease Agreement, except that the Term and the commencement of
rentals shall not commence except pursuant to Paragraph 1A above. Tenant shall
be responsible for constructing the improvements as shown on the Final Plans
(hereafter called "Tenant's Improvements") at Tenant's sole cost and expense.
Article 27 below, and Tenant's obligations thereunder shall specifically be
applicable to the Tenant's Improvements and all Work performed or to be
performed by Tenant. Tenant acknowledges that the Work shall begin with the
Premises in its current "as is" condition with the exception of the following
("Landlord's Work"): the Premises shall be in broom-clean condition. After
completion of, the Tenant's Improvements, Tenant shall supply to Landlord lien
waivers from all suppliers, subcontractors and other entities listed on the
sworn construction statements together with a blanket lien waiver from Tenant's
contractor for the full amount of the Work. Within ninety (90) days subsequent
to the commencement of the Term, Tenant, shall submit in writing to Landlord a
list ("Tenant's Equipment") of any equipment and/or fixtures it deems to be
"trade fixtures" and which Tenant shall be removing at the end of the Term (or
last Renewal Term, if applicable). In no event shall any Tenant Improvement
which [ILLEGIBLE] any existing Building system or any Building equipment
servicing more than just the Premises be included as Tenant's Equipment. If no
list is so submitted to Landlord then none of the equipment and improvements
installed by Tenant shall be deemed trade equipment nor removable by Tenant at
the end of the Term, unless it is covered by a separate license agreement
between Landlord and Tenant. If Tenant desires to add equipment not shown on the
Final [ILLEGIBLE] (whether during the performance of Tenant's Work or
subsequently during the Term or any Renewal Term) then it shall supplement
Tenant's Equipment List prior to the installation of such equipment. Landlord,
in connection with its approval of the Final Plans, shall provide Tenant with a
list of the improvements which Landlord will require Tenant to remove at the end
of the Term (or last Renewal Term, if applicable) pursuant to Article 19
[ILLEGIBLE] Any Tenant Improvements not on such list, or if Landlord fails to
supply such list to Tenant prior to the completion of the Tenant Improvements,
Landlord shall be deemed to have waived its rights under Article 19 to required
Tenant to so remove such Tenant Improvements.

      B. The parties acknowledge that the Tenant's Work shall include the
following matters (whether or not included within the Final [ILLEGIBLE]

            1 . the following electrical systems requirements:

                  (i) reconfiguring the power distribution system in connection
      with the power to be distributed to the "Electrical [ILLEGIBLE] (as
      defined below) including installation of electrical grounding facilities
      connected to the Building's water main, provided the same [ILLEGIBLE]
      violate any city ordinance and any necessary consents from the City of
      Minneapolis are obtained by Tenant, at its sole cost and expense.

                  (ii) providing of A/C electric capacity delivered to a pull
      box within the Premises at a capacity for Tenant's need [ILLEGIBLE]
      electrical capacity may exist, but Tenant is responsible for verifying
      same, as well as confirming that such is sufficient for its needs,
      [ILLEGIBLE] the "Tenant Generator", as defined below). If Tenant
      determines that its electrical requirements exceed the existing service to
      the [ILLEGIBLE] Tenant shall be entitled to, at its sole cost and expense,
      increase such capacity, provided it obtains the necessary governmental
      approvals [ILLEGIBLE] additional costs for service fees are incurred by
      Landlord. Landlord agrees to cooperate with any applications Tenant may be
      required [ILLEGIBLE] to any appropriate governmental agencies and/or
      public utility providers in connection therewith, provided the same shall
      be without [ILLEGIBLE] Landlord;

                  (iii) Tenant shall be entitled to install an UPS electrical
      system and/or batteries all in a segregated area of the [ILLEGIBLE] along
      with the Telecommunications Equipment ("Electrical Room") which Electrical
      Room shall have an electric submeter for all electric [ILLEGIBLE] of the
      equipment contained therein;

                                       3
<PAGE>

      2. installation of the following:

            (i) Tenant shall cause to be removed all modular interior walls from
within the Premises and store the same inside the Premises (or at such other
storage location as designated by Landlord) until the completion of Tenant's
Work, at which time said removed modular interior walls (together with any
additional modular interior walls Landlord may have in storage) shall be made
available by Landlord to Tenant for installation of offices and rooms (including
the Electrical Room) utilizing Landlord's modular walls, to the extent Tenant so
desires;

            (ii) installation of floor covering and wall coverings pursuant to
Final Plans;

            (iii) installation of cabling and conduit from the Premises to
Tenant's telecommunication antennae and related equipment on the roof of the
Building (which placement, location and maintenance of such equipment shall be
governed by a separate license agreement in the form of Exhibit B attached
hereto and incorporated herein by reference). Tenant agrees that at no time
during the Term shall it use, license or otherwise agree to utilize any space
upon the Building or land upon which it is located for antennae space, except
pursuant to Exhibit B, and in no event shall it use, license, utilize or rent
space from other tenants or licensees of the Building without the consent of
Landlord, which consent may be conditioned upon payment of reasonable fees to
Landlord;

            (iv) use of the Building's existing conduit and riser space and in
the event existing conduit is not available, the installation of conduit and
cabling from the Electric Room to Tenant's network outside of the Building. In
connection therewith Landlord shall cooperate with Tenant to locate and utilize
an appropriate riser space from the Premises to other necessary levels of the
Building, such cooperation may include core drilling (subject to Paragraph 4C
below). Tenant shall also have the right to construct dual telecommunication
conduit entrances to the Building (as reasonably approved by Landlord), which
may include the removal and replacement of curbing and/or sidewalks, and
trenching and repairing portions of the parking lot and/or other common areas,
all subject to Paragraph 4C below. Tenant agrees to cooperate and coordinate
with other tenants of the Building desiring or constructing such dual
telecommunication conduit entrances. Notwithstanding anything contained in this
Lease Agreement to the contrary, all cabling and conduit, located on the
exterior of the Premises shall become the property of Landlord upon the
expiration of the Term and shall be surrendered with the Premises.

      3. installation of the following heating, ventilation, air conditioning
systems, equipment or facilities ("HVAC"):

            (i) installation of such plumbing, cables, controls and accessory
equipment to connect the Electrical Room to cooling equipment to be installed by
Tenant.

            (ii) such equipment to provide Tenant' necessary HVAC capacity to
the Premises, including but not limited to condensers on the exterior of the
Building, or on the roof of the Building, at such location as approved by
Landlord ("Cooling Equipment").

            (iii) in connection with the Cooling Equipment or other forms of
cooling, such drains as Tenant deems necessary, subject to Paragraph 4C below.

            (iv) Tenant shall have the right to modify the Building's heating
system servicing the Premises, subject to Paragraph 4C below.

            (v) Tenant shall modify the duct work and other modifications
necessary to the Building's HVAC so as to service the office portions of the
Premises.

      4. subject to the prior approval of Landlord, which approval shall not be
unreasonably withheld or delayed, Tenant shall be entitled to reinforce the
floor load capacity of the Premises. Tenant shall be responsible for assuring
that its equipment and any of the Work performed within the Premises does not
exceed the floor capacities of the Building and/or Premises and Tenant shall
indemnify and hold Landlord harmless from all damage, liability and costs
(including reasonable attorneys' fees) in the event it over-loads the floor
capacity of the Premises, but only to the extent it exceeds 80 ppf live weight
and 20 ppf dead weight.

      5. Tenant shall have the right to modify the Building's sprinkler system
serving the Premises (including installation of a fire suppression system which
may be independent of the Building's system or have the system servicing the
Premises modified to a dry pipe system), pursuant to Final Plans to be approved
by Landlord.

      6. Tenant shall have the right to install an emergency generator (the
"Tenant Generator") either (at Landlord's election) in an enclosed pad on the
roof of the Building or at the exterior of the Building in a location approved
by Landlord, subject to the following:

      a.    Tenant shall first obtain such governmental approvals,
            authorizations and permits as are required to install and operate
            the Tenant Generator.

      b.    All plans and specifications for the installation of the Tenant
            Generator and its connection to the Premises must be approved, in
            advance, by Landlord. The installation of the Tenant Generator shall
            be performed in a manner approved by Landlord. The Tenant Generator
            may consist of up to 350 KW diesel generator and up to a related
            1000 gallon fuel tank.

      c.    Tenant shall pay the entire cost of installing the Tenant Generator,
            including any modifications to the generator area required to
            accommodate and screen the Tenant Generator.

      d.    Tenant shall maintain the Tenant Generator and any related
            equipment, at its sole cost and expense, in good order and condition
            and will repair any damage to the Building and/or any other
            equipment caused by the Tenant Generator and/or its installation
            and/or removal. Landlord shall not be liable to Tenant or to any
            other person for any loss or damage to the Tenant Generator
            regardless of cause, other than the negligence or acts of Landlord,
            its agents or employees.

      e.    Tenant shall have the right to install gas generator(s) in lieu of
            diesel. In either event: (i) any fuel tank shall be located above
            ground and within the frame of the generator, (ii) Tenant shall
            install such spill protection and other tank monitoring devices as
            shall be required by governmental codes and regulations, (iii)
            Tenant shall provide Landlord with copies of all warranties and
            evidence of any testing required by law, and (iv) Tenant shall
            indemnify Landlord from and against any and all costs and liability
            arising from a leak from such fuel tank, including, without
            Limitation, any clean-up costs.

      f.    Upon the termination of the Lease Agreement, Tenant will have the
            right to remove the Tenant Generator, provided, (i) the Tenant
            Generator is removed within five (5) days following the termination
            of the Lease Agreement, and (ii) Tenant shall repair all damage to
            the Building and/or any other equipment caused by the removal of the
            Tenant Generator.

      C. All of Tenant's Work shall be performed in a good and workmanlike
manner using first grade and new materials and to the extent any of such Work
involves alteration or replacement of any existing equipment or facilities of
the Building, Tenant shall use a standard and grade equal to or

                                       3
<PAGE>

better than such existing equipment and facilities. To the extent any of
Tenant's Work involves areas outside the Premises ("Exterior Work"), Tenant and
its contractors shall coordinate all such Work with Landlord and Landlord's
Building Manager, on a daily basis. All such Work, including the Exterior Work,
shall be performed in a manner so as to not unreasonably disturb or interfere
with the operations of the Building or other tenants of the Building;
specifically, but not exclusively including, the performance of all such Work
which may involve loud and/or irritating noises, vibrations, dust and/or odors
after normal business hours (as defined in Paragraph 7D below). In all events,
whenever the Tenant's Work involves the alteration and/or interference with any
of the Building's systems, including, but not limited to, electrical, water,
HVAC, sprinkler, plumbing and life/health/safety systems, Tenant shall indemnify
and hold Landlord harmless with respect to any interruption of such systems to
other portions of the Building and/or other tenants and the continued
operational integrity of such systems as a result of the Work. In all events,
Tenant, at is sole cost and expense, shall obtain all applicable governmental
approvals with respect to the installation or doing of all Work including the
Exterior Work. Tenant shall cause its contractors and subcontractors to utilize
only those parking areas designated by Landlord, and to the extent such use
utilizes parking spaces, Tenant shall utilize its parking licenses (as set forth
in Paragraph 14D and Exhibit C below) for such purposes and Tenant shall be
responsible for the license fees due thereunder during such parking use by
Tenant's contractors and subcontractors. Landlord agrees to cooperate, at no
cost to it, with respect to the obtaining of any such governmental approvals,
such cooperation, however, shall not extend to providing any concessions to the
governmental authority with respect to zoning, parking or other restrictions
relating to the Building.

      D. Landlord agrees to make such alterations to the common area restroom
facilities on the first floor as necessary so as to put them in compliance with
Title III of the Americans with Disabilities Act of 1990 ("ADA"). Tenant shall
perform its Work so as to be in compliance with the ADA.

ARTICLE 5 - POSSESSION

      A. Tenant shall have access and possession to the Premises pursuant to
Article 4 above. Construction delays affecting Tenant's Work due to material
shortages, strikes, or acts of God, or otherwise shall in no event postpone the
date of commencement of the Term of this Lease Agreement nor of the payment of
rentals. By occupying the Premises as a Tenant, or to install fixtures,
facilities or equipment, or to perform the Work, Tenant shall be conclusively
deemed to have accepted the same, except for any latent defects affecting the
Building. Immediately after Tenant's completion of its Work, Landlord and Tenant
shall execute a ratification agreement which shall set forth the final
commencement and termination dates for the Term and shall acknowledge the
Minimum Rental, the square footage of the Premises, and delivery of the Premises
in the condition required by this Lease Agreement.

      ARTICLE 6 - TENANT'S PRO RATA SHARE OF REAL ESTATE TAXES AND OPERATING
EXPENSES ABOVE BASE

      A . Commencing with the first full calendar year subsequent to the
commencement of the Term, during each full or partial calendar year during the
Term of this Lease Agreement, Tenant shall pay to Landlord, as Additional
Rental, the amounts by which actual Real Estate Taxes and Operating Expenses
(both as hereafter defined) per square foot of rentable area in the Building
multiplied by the number of square feet of rentable area in the Premises exceed
the Real Estate Tax Base and the Operating Expense Base, respectively (both as
hereafter defined) prorated for the period that Tenant occupied the Premises. In
the event that during all or any portion of any calendar year, the Building is
not fully rented and occupied Landlord may make any appropriate adjustment in
occupancy-related Operating Expenses for such year for the purpose of avoiding
distortion of the amount of such Operating Expenses to be attributed to Tenant
by reason of variation in total occupancy of the Building, by employing sound
accounting and management principles to determine Operating Expenses that would
have been paid or incurred by Landlord had the Building been 100% rented and
occupied, and the amount so determined shall be deemed to have been Operating
Expenses for such year. As used herein, the "Real Estate Tax Base" shall be
$0.91 per rentable square foot times the rentable square feet contained within
the Premises, and the "Operating Expense Base" shall be $3.34 per rentable
square foot times the rentable square feet contained within the Premises. If the
actual Real Estate Taxes or Operating Expenses per square foot times the
rentable square feet contained within the Premises are less than the Real Estate
Tax Base or Operating Expense Base, respectively, Tenant shall not be entitled
to any refund or credit.

      B. Commencing with the first full calendar year subsequent to the
commencement of the Term, Landlord shall, each year during the Term of this
Lease Agreement, give Tenant an estimate of Operating Expenses and an estimate
of Real Estate Taxes payable per square foot of rentable area for the coming
calendar year. If either such estimate exceeds the respective Real Estate Tax
Base or Operating Expense Base (as defined above), Tenant shall pay, as
Additional Rental, along with its monthly Minimum Rental payments required
hereunder, one-twelfth (1/12) of such excess estimated Operating Expenses and/or
Real Estate Taxes and such Additional Rental shall be payable until subsequently
adjusted for the following year pursuant to this Article.

      C. As soon as possible after the expiration of each calendar year
beginning with the first full calendar year subsequent to the commencement of
the Term, but in any event no later than ninety (90) days following the close of
the calendar year, Landlord shall determine and certify to Tenant the actual
Operating Expenses and Real Estate Taxes for the previous year per square foot
of rentable area in the Building and the amounts applicable to the Premises. If
such statement shows that Tenant's share of increases in Operating Expenses and
Real Estate Taxes over the Operating Expense Base and the Real Estate Tax Base,
respectively exceeds Tenant's estimated monthly payments for the previous
calendar year, then Tenant shall, within twenty (20) days after receiving
Landlord's certification, pay such deficiency to Landlord. In the event of an
overpayment by Tenant, such overpayment (not to exceed the amount of the
estimated payments) shall be refunded to Tenant, at the time of certification,
in the form of an adjustment in the Additional Rental next coming due, or if at
the end of the Term by a refund. By written notice given to Landlord no later
than six (6) months following delivery of the written certification of Landlord,
Tenant shall have the right to audit, or have audited the written certification
and the books and records from which such certification is derived. Tenant shall
pay the costs of any such audit, unless it is determined that Tenant's
overpayment was more than five percent (5%) of the actual amount in which case
Landlord shall reimburse Tenant for the reasonable cost of the audit.

      D. For purposes of this Article, the term "Real Estate Taxes" means the
total of all taxes, fees, charges and assessments, general and special, ordinary
and extraordinary, foreseen or unforeseen, which become due and payable upon the
Building. All reasonable costs and expenses incurred by Landlord during
negotiations for or contests of the amount of Real Estate Taxes shall be
included within the term "Real Estate Taxes". For purposes of this Article, the
term "Operating Expenses" shall be deemed to mean all costs and expenses
directly related to the Building incurred by Landlord in the repair, operation,
management and maintenance of the Building including interior and exterior and
common area maintenance, management fees, cleaning expenses, energy expenses,
insurance premiums, and the amortization of capital investments made to reduce
operating costs or that are necessary due to governmental requirements, all in
accordance with generally accepted accounting principles. Notwithstanding the
foregoing, the parties acknowledge and agree that the janitorial services and
electricity to the Electrical Room shall be supplied by Tenant at its costs
and/or submetered and paid for by Tenant ("Tenant Supplied Utilities") and
Tenant acknowledges that it shall be given no credit against Operating Expenses
for those portions of the Premises being serviced by Tenant Supplied Utilities.
The following shall not be included in Operating Expenses:

            (1) real estate brokerage and leasing commissions;

            (2) cost of alterations of any tenant's premises;

            (3) allowances or concessions provided to any tenant or occupant of
the Building;

            (4) costs incurred to make major repairs or replacements of any
defective initial construction of the Building and related appurtenances
regardless of how such costs are characterized under generally accepted
accounting principles;

            (5) legal expenses incurred in connection with the preparation or
negotiation of leases, subleases, assignments or other lease-related documents
with current, prior or prospective tenants or occupants of the Building;

            (6) marketing or advertising costs to solicit new tenants;

                                       4
<PAGE>

            (7) wages, salaries, fees, and fringe benefits paid to executive
personnel or officers or partners of Landlord not having direct day to day
responsibility for operating or providing services to the Building;

            (8) the cost, above any applicable deductible, of repairs or other
work occasioned by fire, windstorm or other casualty of an insurable nature or
by the exercise of eminent domain;

            (9) costs incurred for alterations, replacements or improvements
that would be considered capital improvements under sound accounting and
management principles consistently applied, except current amortization
(together with interest of ten percent (10%) per annum on the unamortized
amount) of the capital improvement cost over the reasonable useful life of the
improvement where such capital improvement is reasonably necessary to improve
the operation or maintenance efficiency of the Building or as otherwise
expressly permitted above, provided that the amortization costs charged to
direct costs for capital improvements to improve the operation or maintenance
efficiency of the Building shall be limited to the estimated reduction in direct
costs for the relevant years resulting from such capital improvements;

            (10) expenses in connection with services or other benefits of a
type which are not provided or available to Tenant but which are provided to
another tenant of the Building or to some other third party;

            (11) costs incurred due to violation by Landlord or any tenant of
the Building of the terms or conditions of any lease;

            (12) Landlord's general overhead except as it directly relates to
the management and operation of the Building;

            (13) all items and services for which any tenant reimburses Landlord
or pays third persons;

            (14) ground lease rentals, principal or interest payments,
refinancing charges or points, or penalties resulting from late payments by the
Landlord, or depreciation;

            (15) costs incurred in connection with the cure or correction of
latent defects at the Building and cost incurred in connection with the clean-up
of Hazardous Substances from the Project or Building;

            (16) Landlord's cost of services sold separately to tenants for
which Landlord is entitled to be reimbursed by such tenants as an additional
charge;

            (17) costs incurred in connection with negotiations or disputes with
tenants of the Building;

            (18) costs incurred in connection with renovating or otherwise
improving or decorating leased space for other tenants or other occupants or
vacant tenant space, other than common areas;

            (19) any particular item or service for which Tenant otherwise
reimburses Landlord by direct payment;

            (20) any expense for which Landlord is compensated through proceeds
of insurance or agreements of indemnity or surety bonds or guaranties;

            (21) any fines or penalties incurred due to actual or alleged
violations by Landlord of any governmental rule or authority;

            (22) cost of legal, accounting and other professional services
incurred by Landlord in connection with leasing activities or other activities
which are not Operating Expenses, and costs of audits of any kind performed by
tenants;

            (23) any bad debt loss, rent loss, or reserves for bad debt or rent
loss;

            (24) Landlord's general corporate overhead and general
administrative expenses; and

            25) Costs arising from Landlord's charitable or political
contributions.

      E. Landlord may at any time designate a fiscal year in lieu of a calendar
year and in such event, at the time of such a change, there may be a billing for
the fiscal year which is less than 12 calendar months.

      F. Landlord reserves, and Tenant hereby assigns to Landlord, the sole and
exclusive right to contest, protest, petition for review, or otherwise seek a
reduction in the Real Estate Taxes. In the event of any reductions in the Real
Estate Taxes due to Landlord's contesting the same which relate to taxes due and
payable for a year during the Term, such tax reduction, after payment of
Landlord's costs and expenses incurred in connection with effectuating such
reduction, shall be retroactively given effect, and Tenant shall be refunded its
Proportionate Share of said reduction (but not below the Real Estate Tax Base).

      G. Landlord shall keep and maintain records of all Operating Expenses,
Real Estate Taxes for a period of not less than two (2) years. which records
shall be made available to Tenant at reasonable times at Landlord's offices for
inspection and copying by Tenant or its representatives, at Tenant's cost. If
Tenant in good faith disputes the accuracy of the total amount of Operating
Expenses or Real Estate Taxes, Tenant may audit Landlord's books and records by
Tenant's representative. If such audit establishes that any of the actual
Operating Expenses or Real Estate Taxes are less than Landlord's final
determination thereof by four percent (4%) or more, then Landlord shall pay the
cost of such audit. Any over-charged or under-paid amounts shall be reimbursed
by the responsible party with thirty (30) days following delivery of such audit
to Landlord, provided Landlord does not contest the same. Any amounts payable
pursuant to this Lease Agreement shall continue to be paid during the pendency
of any audit or dispute, but upon final determination or resolution of such
dispute, any amounts payable by one party to the other hereunder shall bear
interest at the rate of eight percent (8%) per annum.

ARTICLE 7 - UTILITIES AND SERVICE

      A. Landlord agrees to provided water and sanitary sewer services to the
common area restrooms of the Building, together with janitorial supplies and
cleaning services to such restroom facilities.

      B. Landlord agrees to furnish heat during the usual heating season and air
conditioning during the usual air conditioning season, as well as electricity
and janitorial services to the office areas of the Premises (all specifically
excluded from the Electrical Room), on a 24-hour basis. Electricity to the
Electrical Room shall be by separate submeter.

      C. No temporary interruption or failure of such services incidental to the
making of repairs, alterations or improvements, or due to accidents or strike or
conditions or events not under Landlord's control, shall be deemed as an
eviction of the Tenant or relieve the Tenant from any of the Tenant's
obligations hereunder. Notwithstanding the foregoing, if for any reason
whatsoever, except due to force majeure or by any negligent act or omission or
intentional misconduct of Tenant and as a result: (i) all or any portion of the
Premises shall become untenantable (the "Untenantahle Premises")

                                       5
<PAGE>

for the normal conduct of Tenant's business for a period of three (3)
consecutive days, (ii) Tenant shall vacate the Untenantable Premises and cease
doing business therein (provided, however, that the continued presence of
Tenant's security personnel therein for the purposes of preservation of Tenant's
property shall not constitute a failure by Tenant to vacate the Untenantable
Premises) and (iii) Tenant shall give notice to Landlord of the facts set forth
in clauses (i) and (ii) above, then in such event, the portion of the Rents
allocable to the Untenantable Premises shall be fully abated for the period
commencing on the day that all the conditions set forth in (i), (ii) and (iii)
above shall first be satisfied and ending on the date that the Untenantable
Premises shall be rendered usable for the normal conduct of Tenant's business
and Landlord shall have given notice thereof (or the date Tenant shall re-occupy
the Untenantable Premises for the normal conduct of its business, if earlier).

      D. For the purposes of this Article 7, normal business hours shall be
deemed to mean the period of time between 8:00 a.m. and 6:00 p.m., Monday
through Friday, and 8:00 a.m. to 1:00 p.m. Saturdays, and specifically excluding
Sundays and legal holidays. Landlord agrees that Tenant shall have access to the
Premises 24 hours per day, 7 days per week, however, after normal business hours
such access may be subject to the use of security cards and other rules and
regulations which Landlord may adopt from time to time with respect to the
Building, provided the same are reasonable and are equally applicable to all
tenants of the Building.

      E. Tenant shall have the right to place telecommunications equipment of
its customers within the Premises ("Co-Location") and such Co-Location shall not
be deemed an assignment or sublease under the terms of this Lease Agreement
regardless whether a written agreement exists between Tenant and its customers.

      F. Tenant agrees prior to such time as it installs its own Tenant
Generator (and during such time after Tenant has so installed its own Tenant
Generator that it elects to continue to have available to it access to the
Landlord's back-up emergency and UPS generator(s)) that it shall: i) pay to
Landlord and additional $.50 per square foot of rentable area within the
Premises, per annum, in monthly installments, as additional rent for each of
Landlord's back-up emergency generator and its UPS generator (i.e. a total of
$1.00 per square foot); and ii) pay to Landlord its proportionate costs of all
maintenance of the Building's back-up emergency generator and UPS generator.
Such proportionate use shall be based on electrical connected load hooked up to
said generators as compared to electrical connected load of other tenants within
the Building hooked up to said generators.

      G. If the Tenant installs its own Tenant Generator, Tenant shall cooperate
with the Landlord in load shedding and/or peak moving program when requested by
the electric utility supplier (Northern States Power Company). Tenant
acknowledges that compliance with Northern States Power Company's load shedding
program has resulted in lower electrical charges to Landlord and is expected to
result in lower electrical charges to Tenant.

ARTICLE 8 - NON-LIABILITY OF LANDLORD

      Except in the event of negligence of Landlord, its agents, employees or
contractors, or as specifically provided herein, Landlord shall not be liable
for any loss or damage for failure to furnish heat, air conditioning,
electricity, elevator service, water, sprinkler system or janitorial service.
Landlord shall not be liable for personal injury, death or any damage from any
cause about the Premises or the Building except if caused by Landlord's
negligence or willful misconduct.

ARTICLE 9 - CARE OF PREMISES

        A.   Tenant agrees:

            1. To keep the Premises in as good condition and repair as they were
in at the time Tenant took possession of same, reasonable wear and tear and
damage from fire and other casualty for which insurance is normally procured
excepted;

            2. To keep the Premises in a clean and sanitary condition;

            3. Not to commit any nuisance or waste on the Premises, overload the
Premises or the electrical, water and/or plumbing facilities in the Premises or
Building, throw foreign substances in plumbing facilities, or wastefully use any
of the utilities furnished by Landlord;

            4. To abide by such rules and regulations as may from time to time
be reasonably promulgated by Landlord;

            5. To obtain Landlord's prior approval (not to be unreasonably
withheld) of the interior design of any portion of the Premises visible from the
common areas or from the outside of the Building. "Interior design" as used in
the preceding sentence shall include but not be limited to floor and wall
coverings, furniture, office design, artwork and color scheme; and

              6. Tenant shall maintain, repair and replace, if necessary any and
all equipment and/or facilities and/or trade fixtures which services, or is
dedicated, solely or exclusively to the Premises and/or Tenant, whether
initially installed by Landlord or Tenant, all at Tenant's sole cost and
expense.

      B. If Tenant shall fail to keep and preserve the Premises in the state of
condition required by the provisions of this Article 9, the Landlord may at its
option put or cause the same to be put into the condition and state of repair
agreed upon, and in such case the Tenant, on demand, shall pay the cost thereof.

      C. Landlord agrees to keep and maintain the common areas of the Building
consistent with other Class B buildings in the Minneapolis central business
district.

ARTICLE 10 - NON-PERMITTED USE

      A. Tenant agrees to use the Premises only for the purposes set forth in
Article 2 hereof. Tenant further agrees not to commit or permit any act to be
performed on the Premises or any omission to occur which shall be in violation
of any statute, regulation or ordinance of any governmental body or which will
increase the insurance rates on the Building or which will be in violation of
any insurance policy carried on the Building by the Landlord. Tenant, at its
expense, shall comply with all governmental laws, ordinances, rules and
regulations applicable to Tenant's particular use of the Premises and shall
promptly comply with all governmental orders, rulings and directives for the
correction, prevention and abatement of any violation upon, or in connection
with Tenant's particular use of the Premises, including the making of any
alterations or improvements to the Premises, all at Tenant's sole cost and
expense. The Tenant shall not duster other occupants of the Building by making
any undue or unseemly noise and shall not do or permit to be done in or about
the Premises anything which will be dangerous to life or limb. In connection
with the foregoing provision, Tenant covenants and agrees that it shall not
store, process, produce or dispose of any flammables, explosives, radioactive
materials, ACM's, polychlorinated biphenyls (PCB's), chemicals known to cause
cancer or reproductive toxicity, pollutants, contaminants, hazardous waste,
toxic substances, petroleum and petroleum products, [ILLEGIBLE] carbons (CPC's)
and substances declared to be hazardous or toxic (collectively "Hazardous
Substances") in violation of any present or future Federal, state or local
environmental law, ordinance or regulation ("Environmental Laws") upon the
Premises or any part thereof without first obtaining Landlord's written consent,
which consent may be withheld or denied in Landlord's sole discretion, provided
that Landlord hereby consents to Hazardous substances in small quantities as are
typically used in an office building (such as, toner, cleaning fluids, etc.).
Tenant agrees to indemnify and defend and hold Landlord harmless from and
against all fines, suits, claims, actions, damages, liabilities, costs and
expenses (including reasonable attorney's fees) entered against Landlord arising
out of and in any way connected with Tenant's failure to comply with its
obligations of this Paragraph or arising from [ILLEGIBLE] (specifically
including any diesel fuel), which indemnification shall survive the expiration
of the termination of this Lease Agreement.

      B. Landlord represents that it was not the owner of the Building during
construction, but to Landlord's actual knowledge [which is not based upon any
outside investigation other than that certain Phase I Environmental Report
prepared on behalf of the FDIC/RTC ("Environmental Report"), a copy of which has
been provided to Tenant] that the Building was constructed using no asbestos or
asbestos containing materials ("ACM"). Landlord hereby covenants that if, at any
time during the Term of the Lease Agreement, as the same may be extended,
"Hazardous Substances" are required to be removed, encapsulated or otherwise
remediated by any legal governmental authority having jurisdiction over the
Building, the presence for which Landlord is the "responsible party" and Tenant
is not a "responsible party" (as defined by Environmental Laws) then Landlord
shall so remediate the same as of

                                       6
<PAGE>

required, at Landlord's sole cost and expense and not as a part of Operating
Expenses. Landlord agrees to indemnify and defend and hold Tenant harmless from
and against all fines, suits, claims, actions, damages, liabilities, costs and
expenses (including attorneys' fees) asserted by such governmental authorities
against Tenant arising out of or in any way connected with Landlord's failure to
comply with its obligations in the preceding sentence, which indemnification
shall survive the expiration or the termination of this Lease Agreement.

ARTICLE 11 - INSPECTION

      The Landlord or its employees or agents shall have the right without any
diminution of rent or other charges payable hereunder by Tenant to enter the
Premises at all reasonable times for the purpose of exhibiting the Premises to
prospective tenants or purchasers, inspection, cleaning, repairing, testing,
altering or improving the same or said Building, but nothing contained in this
Article shall be construed so as to impose any obligation on the Landlord to
make any repairs, alterations or improvements. Landlord's rights under this
section shall be exercised in such a manner as to create the least practicable
interference with Tenant's use and occupancy of the Premises. Except in the case
of an emergency which makes notice to Tenant impractical, any entry on the
Premises by Landlord shall be made at reasonable times after reasonable notice
to Tenant. In exercising Landlord's rights of entry, Landlord shall comply with
Tenant's reasonable security regulations of which Landlord has been advised of
in writing. Landlord hereby recognizes that Tenant is engaged in a business that
involves access to privileged and confidential matters and information and
agrees to take reasonable precautions as to not compromise such confidentiality.
Therefore Landlord agrees that Landlord may enter and pass through the Premises
only when accompanied by a representative of Tenant, provided that Tenant agrees
to make such representative available. Landlord agrees that it shall not enter
the Premises for the purpose of exhibiting the Premises to prospective tenants,
except during the last nine (9) months of any Term, or at any time when Tenant
is in default.

ARTICLE 12 - ALTERATIONS

      Tenant will not make any alterations, additions or improvements in or to
the Premises or add, disturb or in any way change any plumbing, wiring,
life/safety or mechanical systems, locks, or structural portions of the Building
without the prior written consent of the Landlord as to the character of the
alterations, additions or improvements to be made, the manner of doing the work,
and the contractor doing the work. Such consent shall not be unreasonably 6 6 0
withheld or delayed, if such alterations, repairs additions or improvements are
required of Tenant or are the obligation of Tenant pursuant to this Lease
Agreement. All such work shall comply with all applicable governmental laws,
ordinances, rules and regulations. Tenant agrees to indemnify and hold Landlord
free and harmless from any liability, loss, cost, damage or expense (including
attorney's fees) by reasons of any said alteration, repairs, additions or
improvements.

ARTICLE 13 - SIGNS

      Tenant agrees that no signs or other advertising materials shall be
erected, attached or affixed to any portion of the interior or exterior of the
Premises or the Building without the express prior written consent of Landlord.
Landlord, at its sole cost and expense, shall install Building standard tenant
graphics at the main entry to the Premises and an identification strip for
Tenant on the Building's lobby directory.

ARTICLE 14 - COMMON AREAS

      A. Tenant agrees that the use of all corridors, passageways, elevators,
toilet rooms, parking areas and landscaped area in and around said Building, by
the Tenant or Tenant's employees, visitors or invitees, shall be subject to such
reasonable rules and regulations as may from time to time be made by Landlord
for the safety, comfort and convenience of the owners, occupants, tenants and
invitees of said Building. Tenant agrees that no awnings, curtains, drapes or
shades shall be used upon the Premises except as may be approved by Landlord,
such approval not to be unreasonably withheld, delayed or conditioned,

      B. In addition to the Premises, Tenant shall have the right of
non-exclusive use, in common with others, of (a) all unrestricted automobile
parking areas, driveways and walkways, and (b) loading facilities, freight
elevators and other facilities as may be constructed in the Building, all to be
subject to the terms and conditions of this Lease Agreement and to reasonable
rules and regulations for the use thereof as prescribed from time to time by
Landlord.

      C. Landlord shall have the right to make changes or revisions in the site
plan and in the Building so as to provide additional leasing area. Landlord
shall also have the right to construct additional buildings on the land
described on Exhibit A-2 for such purposes as Landlord may deem appropriate.
Subject to Tenant's rights in respect of the Tenant Improvements, Landlord also
reserves all airspace rights above, below and to all sides of the Premises,
including the right to make changes, alterations or provide additional leasing
areas, provided the same do not interfere with Tenant's operations on or from
the Premises.

      D . Landlord and Tenant agree that Landlord will not be responsible for
any loss, theft or damage to vehicles, or the contents thereof, parked or left
in the parking areas of the Building and Tenant agrees to so advise its
employees, visitors or invitees who may use such parking areas. The parking
areas shall include those areas designated by Landlord, in its sole discretion,
as either restricted or unrestricted parking areas. Any restricted parking areas
shall be leased only by separate license agreement with Landlord. Landlord
agrees to provide Tenant ___unassigned parking spaces and ____ assigned parking
spaces pursuant to license agreements in the form of Exhibit C and Exhibit C-1 ,
respectively. The parking spaces being made available to Tenant pursuant to this
Paragraph shall be made available at the commencement of the Term and continuing
thereafter during the balance of the Term and Renewal Terms, but only to the
extent Tenant continues the initial said number of parking spaces continuously.
If Tenant should cease one or more such parking spaces, then Landlord shall not
and does not guaranty that Tenant shall be entitled to subsequently have such
parking spaces available to it.

ARTICLE 15 - ASSIGNMENT AND SUBLETTING

      A. Tenant agrees not to assign, sublet, license, or encumber this Lease
Agreement, the Premises, or any part thereof, whether by voluntary act,
operation of law, or otherwise without the specific prior written consent of
Landlord; provided however, Landlord agrees not to unreasonably withhold, delay
or deny such consent if: i) such assignment or sublease is in writing and the
assignee or sublessee assumes all the obligations of Tenant under this Lease
Agreement; ii) the proposed subtenant or assignee has a net worth of One Million
Dollars ($1,000,000) or more at the time of such assignment or subletting iii)
the remaining provisions of this Lease Agreement continue to be applicable; and
iv) Tenant shall remain liable hereunder. Landlord further hereby gives its
consent (subject however to Tenant's providing ten (10) days prior written
notice and clauses i), iii) and iv) above being applicable) in an [ILLEGIBLE] of
this Lease Agreement or sublease of the Premises to an "Affiliate" of Tenant or
to any entity into or with which Tenant is [ILLEGIBLE] substantially all the
ownership interests or assets of Tenant; provided the survivor or transferee
continues to operate the business of Tenant [ILLEGIBLE] hereof an Affiliate
shall mean any party that is "related to" Tenant as that term is defined by Sec.
267(b) of the Internal Revenue Code of 1986. Consent by Landlord in one such
instance shall not be a waiver of Landlord's rights under this Article as to
requiring consent for any subsequent instance. In the event Tenant desires to
sublet a part or all of the Premises, or assign this Lease Agreement, Tenant
shall give written notice to Landlord at least thirty (30) days prior to the
proposed subletting or assignment, which notice shall state the name of the
proposed subtenant or assignee, the terms of any sublease or assignment
documents and copies of financial reports or other relevant financial
information of the proposed subtenant or assignee. At Landlord's option, any and
all payments by the proposed assignee or sublessee with respect to the
assignment of sublease shall be paid directly to Landlord. In any event no
subletting or assignment shall release Tenant of its obligation to pay the rent
and to perform all other obligations to be performed by Tenant hereunder for the
Term of this Lease Agreement. The acceptance of rent by Landlord from any other
person shall not be deemed to be a waiver by Landlord of any provision hereof.

      B. Notwithstanding anything to the contrary contained in this Article,
Tenant may collaterally assign, mortgage, pledge, or hypothecate, without
Landlord's consent, its interest in this Lease Agreement to any financing
entity, or agent on behalf of any financing entity to whom Tenant: i) has
obligations for borrowed money or in respect of guarantees thereof, ii) has
obligations evidenced by bonds, debentures, notes, or similar instruments, or
iii) has obligations under or with respect to letters of credit, bankers'
acceptances and similar facilities or in respect of guarantees thereof.

                                       7
<PAGE>

      C. Landlord's right to assign this Lease Agreement is and shall remain
unqualified upon any sale or transfer of the Building and, providing the
purchaser succeeds to the interests of Landlord under this Lease Agreement and
assumes the Landlord's obligations hereunder, Landlord shall thereupon be
entirely freed of all obligations of the Landlord accruing hereunder after such
conveyance and shall not be subject to any liability resulting from any act or
omission or event occurring after such conveyance.

ARTICLE 16 - LOSS BY CASUALTY

      If the Building is damaged or destroyed by fire or other casualty, the
Landlord shall have the right to terminate this Lease Agreement, provided it
gives written notice thereof to the Tenant within ninety (90) days after such
damage or destruction. If a portion of the Premises or Building is damaged by
fire or other casualty, and in the reasonable opinion of Landlord: i) the
Premises cannot be restored to tenantable condition within a period of ninety
(90) days following the commencement of such restoration work, and/or ii) the
cost of performing such restoration work exceeds the proceeds of Landlord's
casualty insurance by more than $100,000, then Landlord shall not be required to
make any repairs and Landlord shall have the right to terminate this Lease
Agreement upon written notice to Tenant within thirty (30) days of the date of
such fire or other casualty, in which event, this Lease Agreement shall
terminate as of the date of such notice and Landlord and Tenant shall be
released from any and all liability thereafter accruing hereunder. Landlord
shall notify Tenant of its decision to rebuild or not within said thirty (30)
day period. Anything herein to the contrary notwithstanding, if the Premises are
destroyed or so damaged that they cannot be repaired and made tenantable within
ninety (90) days following commencement of such restoration work, or so damaged
that Landlord shall decide not to repair or rebuild, or Landlord decides to
repair or rebuild, or Landlord decides to repair or rebuild, but does not
restore the Premises to a tenantable condition within ninety (90) days after
commencement of such restoration work (subject to an extension of up to an
additional sixty (60) days due to causes beyond Landlord's control), then, in
any of such instances, Tenant may terminate this Lease Agreement by giving
notice to Landlord within thirty (30) days after Tenant's receipt of Landlord's
notice or the expiration of said ninety (90) day period (as extended due to
causes beyond Landlord's control, as set forth above as applicable, in which
event this Lease Agreement shall terminate as of the date of such notice and
Landlord and Tenant shall be released from any and all liability thereafter
accruing hereunder. If this Lease Agreement has not been terminated by either
Landlord or Tenant, then the rents due hereunder shall abate during such period
of time as the Premises are untenantable, in the proportion that the
untenantable portion of the Premises bears to entire Premises.

      16.1 If the Premises are to be repaired under this Article 16, Landlord
shall repair any injury or damage to the Building itself and the Premises in
substantially the condition the Premises were in at the execution of this Lease
Agreement, specifically excluding any leasehold improvements constructed by
Tenant, Tenant's Equipment or any Collateral, all of which shall be restored to
the extent Tenant deems necessary, at Tenant's sole cost and expense. Tenant
shall, at its own cost and expense, remove all of its furniture and other
personal property from the Premises as Landlord shall reasonably require in
connection with its repair and restoration of the Premises under this Article
16.

ARTICLE 17 - WAIVER OF SUBROGATION

      Landlord and Tenant hereby release the other from any and all liability or
responsibility to the other or anyone claiming through or under them by way of
subrogation or otherwise for any loss or damage to property caused by fire or
any of the extended coverage or supplementary contract casualties, even if such
fire or other casualty shall have been caused by the fault or negligence of the
other party, or anyone for whom such party may be responsible, provided however,
that this release shall be applicable and in force and effect only with respect
to loss or damage occurring during such times as the releasing party's policies
shall contain a clause or endorsement to the effect that any such release would
not adversely affect or impair said policies or prejudice the right of the
releasing party to recover thereunder. Landlord and Tenant agree that they will
request their insurance carriers to include in their policies such a clause or
endorsement. If extra cost shall be charged therefore, each party shall advise
the other of the amount of the extra cost, and the other party, at its election,
may pay the same, but shall not be obligated to do so.

ARTICLE 18 - EMINENT DOMAIN

      If the entire Building is taken by eminent domain, this Lease Agreement
shall automatically terminate as of the date of taking. If a portion of the
Building is taken by eminent domain, the Landlord shall have the right to
terminate this Lease Agreement, provided it gives written notice thereof to the
Tenant within ninety (90) days after the date of taking. If a portion of the
Premises is taken by eminent domain and this Lease Agreement is not terminated
by Landlord, Tenant shall have the right to terminate this Lease Agreement,
provided it gives written notice thereof to Landlord within ninety (90) days of
the date of taking. If neither Landlord nor Tenant terminates, then the Landlord
shall, at its expense, restore the Premises to as near the condition which
existed immediately prior to the date of taking as reasonably possible, and the
rentals shall abate during such period of time as the Premises are untenantable,
in the proportion that the untenantable portion of the Premises hears to the
entire Premises. All damages awarded for such taking under the power of eminent
domain shall belong to and be the sole property of Landlord, irrespective of the
basis upon which they are awarded, provided, however, that nothing contained
herein shall prevent Tenant from making a separate claim to the condemning
authority for its moving expenses and trade fixtures. For purposes of this
Article, a taking by eminent domain shall include Landlord's giving of a deed
under threat of condemnation, and shall be deemed to occur on the earlier of the
date fee simple title has vested or possession has been obtained by the taking
authority.

ARTICLE 19 - SURRENDER

      On the last day of the Term of this Lease Agreement or on the sooner
termination thereof in accordance with the terms hereof, Tenant shall peaceably
surrender the Premises in good condition and repair consistent with Tenant's
duty to make repairs as provided in Article 9 hereof. On or before said last
day, Tenant shall at its expense remove all of its equipment from the Premises,
repairing any damage caused thereby, and any property not removed shall be
deemed abandoned, with the exception of any "Collateral" (as defined in Article
28 below) to the extent of any security interests by third parties. All
alterations, additions and fixtures other than Tenant's trade fixtures, which
have been made or installed by either Landlord or Tenant upon the Premises shall
remain as Landlord's property and shall be surrendered with the Premises as a
part thereof, or shall be removed by Tenant (unless such right to remove has
been waived by Landlord pursuant to Article 4 above), in which event Tenant
shall at its expense repair any damage caused thereby. It is specifically agreed
that any and all telephonic, coaxial, ethernet, or other computer, word
processing, facsimile, or electronic wiring installed by Tenant within the
Premises (hereafter "Wiring") shall be removed at Tenant's cost at the
expiration of the Term, unless Landlord has specifically requested in writing
that said Wiring shall remain, whereupon said Wiring shall be surrendered with
the Premises as Landlord's property. If the Premises are not surrendered at the
end of the Term or the sooner termination thereof, Tenant shall indemnify
Landlord against loss or liability resulting from delay by Tenant in so
surrendering the Premises, including, without limitation, claims made by any
succeeding tenant founded on such delay. Tenant shall promptly surrender all
keys for the Premises to Landlord at the place then fixed for payment of rental
and shall inform Landlord of combinations on any locks and safes on the
Premises.

ARTICLE 20- NON-PAYMENT OF RENT, DEFAULTS

      If any one or more of the following occurs: (1) a rent payment or any
other payment due from Tenant to Landlord shall be and remain unpaid in whole or
in part for more than ten (10) days after same is due and payable; (2) Tenant
shall violate or default on any of the other covenants, agreements, stipulations
or conditions herein, or in any parking agreement(s) or other agreements between
Landlord and Tenant relating to the Premises, and such violation or default
shall continue for a period of thirty (30) days after written notice from
Landlord of such violation or default or if such violation or default shall
reasonably require longer than thirty (30) days to cure, if Tenant shall fail to
commence the cure of such default or violation within thirty (30) days after
receipt of notice thereof and/or fail to prosecute a cure to completion with due
diligence; (3) if Tenant shall commence or have commenced against Tenant
proceedings under a bankruptcy, receivership, insolvency or similar type of
action; or (4) if Tenant shall abandon the Premises; then it shall be optional
for Landlord, without further notice or demand, to cure such default or to
declare this Lease Agreement forfeited and the said Term ended, or to terminate
only Tenant's right to possession of the Premises, and to re-enter the Premises,
with or without process of law, using such force as may be necessary to remove
all persons or chattels therefrom, and Landlord shall not be liable for damages
by reason of such re-entry or forfeiture; but notwithstanding re-entry by
Landlord or termination only of Tenant's right to possession of the Premises,
the liability of Tenant for the rent and all other sums provided herein shall
not be relinquished or extinguished for the balance of the Term of this Lease
Agreement and Landlord shall be entitled to periodically sue Tenant for all sums
due under this Lease Agreement or which become due prior to judgment, but such
suit shall not bar subsequent

                                       8
<PAGE>

suits for any further sums coming due thereafter. Tenant shall be responsible
for, in addition to the rentals and other sums agreed to be paid hereunder, The
cost of any necessary maintenance, repair, restoration, reletting (including
related cost of removal or modification of tenant improvements) or cure as well
as reasonable attorney's fees incurred or awarded in any suit or action
instituted by Landlord to enforce the provisions of this Lease Agreement, regain
possession of the Premises, or the collection of the rentals due Landlord
hereunder. Tenant shall also be liable to Landlord for the payment of a late
charge in the amount of 5% of the rental installment or other sum due Landlord
hereunder if said payment has not been received within ten (10) days from the
date said payment becomes due and payable, or cleared by Landlord's bank within
three (3) business days after deposit. Tenant agrees to pay interest at the
highest permissible rate of interest allowed under the usury statutes of the
State of Minnesota, or in case no such maximum rate of interest is provided, at
the rate of 12% per annum, on all rentals and other sums due Landlord hereunder
not paid within ten (10) days from the date same become due and payable. Each
right or remedy of Landlord provided for in this Lease Agreement shall be
cumulative and shall be in addition to every other right or remedy provided for
in this Lease Agreement now or hereafter existing at law or in equity or by
statute or otherwise.

ARTICLE 21 - LANDLORD'S DEFAULT

      Landlord shall not be deemed to be in default under this Lease Agreement
until Tenant has given Landlord written notice specifying the nature of the
default and Landlord does not cure such default within thirty (30) days after
receipt of such notice or within such reasonable time thereafter as may be
necessary to cure such default where such default is of such a character as to
reasonably require more than thirty (30) days to cure.

ARTICLE 22 - HOLDING OVER

      Tenant will, at the expiration of this Lease Agreement, whether by lapse
of time or termination, give up immediate possession to Landlord. If Tenant
fails to give up possession Landlord may, at its option, serve written notice
upon Tenant that such holdover constitutes any one of (i) creation of, a month
to month tenancy, or (ii) creation of a tenancy at sufferance. If Landlord does
not give said notice, Tenant's holdover shall create a tenancy at sufferance. In
any such event the tenancy shall be upon the terms and conditions of this Lease
Agreement, except that the Minimum Rental shall be 150% the Minimum Rental
Tenant was obligated to pay Landlord under this Lease Agreement immediately
prior to termination (in the case of tenancy at sufferance such Minimum Rental
shall be prorated on the basis of a 365 day year for each day Tenant remains in
possession); excepting further that in the case of a tenancy at sufferance, no
notices shall be required prior to commencement of any legal action to gain
repossession of the Premises. In the case of a tenancy at sufferance, Tenant
shall also pay to Landlord all damages sustained by Landlord resulting from
retention of possession by Tenant, provided such damages shall not include
consequential damages if such holdover is for five (5) business days or less.
The provisions of this paragraph shall not constitute a waiver by Landlord of
any right of re-entry as otherwise available to Landlord; nor shall receipt of
any rent or any other act in apparent affirmance of the tenancy operate as a
waiver of the right to terminate this Lease Agreement for a breach by Tenant
hereof.

ARTICLE 23 - SUBORDINATION

      Tenant agrees that this Lease Agreement shall be subordinate to any
mortgage(s) that may now or hereafter be placed upon the Building or any part
thereof, and to any and all advances to be made thereunder, and to the interest
thereon, and all renewals, replacements, and extensions thereof and to execute a
specific subordination agreement (in a form reasonably requested by mortgagee)
if so requested by Landlord, provided the mortgagee named in such subordination
shall agree to recognize this Lease Agreement or Tenant in the event of
foreclosure provided the Tenant is not in default by including non-disturbance
language, in recordable form. In the event of any mortgagee electing to have the
Lease Agreement a prior incumbrance to its mortgage, then and in such event upon
such mortgagee notifying Tenant to that effect, this Lease Agreement shall be
deemed prior in incumbrance to the said mortgage, whether this Lease Agreement
is dated prior to or subsequent to the date of said mortgage. Landlord shall use
its best efforts to obtain a non-disturbance agreement from the existing
mortgagee (the Federal Deposit Insurance Corporation) and any future mortgagees,
in a form reasonably satisfactory to such mortgagee and Tenant.

ARTICLE 24 - INDEMNITY, INSURANCE AND SECURITY

      A. Tenant will keep in force at its own expense for so long as this Lease
Agreement remains in effect public liability insurance with respect to the
Premises in which Landlord shall be named as an additional insured, in companies
and in form acceptable to Landlord with a minimum combined limit of liability of
Two Million Dollars (2,000,000.00). This limit shall apply per location. Said
insurance shall also provide for contractual liability coverage by endorsement.
Tenant shall further provide for business interruption insurance to cover a
period of not less than six (6) months. Tenant will further deposit with
Landlord the policy or policies of such insurance or certificates thereof, or
other acceptable evidence that such insurance is in effect, which evidence shall
provide that Landlord shall be notified in writing thirty (30) days prior to
cancellation, material change, or failure to renew the insurance. Tenant further
covenants and agrees to indemnify and hold Landlord and Landlord's manager of
the Building harmless for any claim, loss or damage, including reasonable
attorney's fees, suffered by Landlord, Landlord's manager or Landlord's other
tenants caused by: i) any act or omission by Tenant, Tenant's employees or
anyone claiming through or by Tenant in, at, or around the Premises or the
Building; ii) the conduct or management of any work or thing whatsoever done by
Tenant in or about the Premises; or iii) Tenant's failure to comply with any and
all governmental laws, rules, ordinances or regulations applicable to Tenant's
particular use of the Premises. If Tenant shall not comply with its covenants
made in this Article 24, Landlord may, at its option, cause insurance as
aforesaid to be issued and in such event Tenant agrees to pay the premium for
such insurance promptly upon Landlord's demand.

      B. Tenant shall be responsible for the security and safeguarding of the
Premises and all property kept, stored or maintained in the Premises. Landlord
will make available to Tenant, at Tenant's request, the plans and specifications
for construction of the Building and the Premises. Tenant represents that it is
satisfied that the configuration of the Building and the Premises, including the
location and dimensions of the floors, walls, windows, doors and means of access
thereto are suitable for the particular needs of Tenant's business. The
placement and sufficiency of all safes, vaults, cash or security drawers,
cabinets or the like placed upon the Premises by Tenant shall be at the sole
responsibility and risk of Tenant. Tenant shall maintain in force throughout the
Term, insurance upon all contents of the Premises, including that owned by
others and Tenant's equipment and any alterations, additions, fixtures, or
improvements in the Premises acknowledged by Landlord to be the Tenant's.

      C. Landlord shall carry and cause to be in full force and effect a fire
and extended coverage insurance policy on the Building, but not contents owned,
leased or otherwise in possession of Tenant. Landlord will also keep in force
during this Term public liability insurance with respect to the Building with a
minimum combined limit of liability of $2,000,000. The cost of such insurance
shall be an Operating Expense.

ARTICLE 25 - NOTICES

      All notices from Tenant to Landlord required or permitted by any
provisions of this Lease Agreement shall be directed to Landlord postage
prepaid, certified or registered mail or sent by U.S. express mail or any
nationally recognized overnight carrier with a signed receipt obtained upon
delivery, at the address provided for Landlord in the preamble to this Lease
Agreement or at such other address as Tenant shall be advised to use by
Landlord. All notices from Landlord to Tenant required or permitted by any
provision of this Lease Agreement shall be directed to Tenant, postage prepaid,
certified or registered mail or sent by U.S. express mail or any nationally
recognized overnight carrier with a signed receipt obtained upon delivery,
at:____________________________________________________________________________
_______________________________________________________________________________
Landlord and Tenant shall each have the right at any time and from time to time
to designate one (1) additional party to whom copies of any notice shall be
sent.

ARTICLE 26 - APPLICABLE LAW

      This Lease Agreement shall be construed under the laws of the State of
Minnesota.

                                       9
<PAGE>

      fifty-fourth (54th) month of the Term), or ii) the seventh (7th)
      anniversary of the Term (if the Termination Notice is given after the
      fifty-fourth (54th) month but prior to the seventy-eighth (78th) month of
      the Term);

            iii. Tenant must not be in default either at the time of the
      Termination Notice nor at the Termination Date and Tenant must comply with
      all of the terms and conditions of this Lease Agreement (including
      surrender of the Premises as required by this Lease Agreement) through the
      Termination Date;

            iv. Tenant must accompany said Termination Notice with a
      "Termination Fee", which shall be equal to the unamortized "Transaction
      Costs" incurred by Landlord in entering into this Lease Agreement. Said
      unamortized Transaction Costs shall be equivalent to the remaining
      principal balance of a hypothetical loan as of the Termination Date, which
      originally had been made as of the commencement date of the Term, in the
      original principal amount equal to the Transaction Costs and amortized
      over the same number of months Tenant is to pay rent under the original
      Term of this Lease at 10.5 % per annum. For purposes of the foregoing,
      "Transaction Costs" shall mean any legal fees and brokerage fees paid in
      connection with this Lease, plus the amount of "free rent" provided to
      Tenant (which shall mean the period from the time Tenant is given access
      to the Premises, until Tenant commences paying Minimum Renal at the rate
      Tenant is required to pay rent at the commencement of the Term) in
      connection with the entering into of this Lease Agreement.

            v. In no event shall Tenant be entitled to terminate this Lease if
      it has exercised its rights to renew under Article I above.

      B. The rights provided to Tenant under this Article are personal to Tenant
and shall expire automatically if Tenant assigns this Lease or subleases all or
any portion of the Premises.

      C. Tenant's rights under this Article may be exercise only once, but at
either of the two (2) time periods set forth above.

      D. Notwithstanding anything contained in this Article to the contrary,
Tenant's rights under this Article shall become null, void and of no further
force or effect if Tenant exercises its Expansion Right (as set forth in the
following Article) at any time after the second (2nd) anniversary of the Term;
provided that if Tenant exercises its Expansion Right at any time prior to the
second (2nd) anniversary of the Term, then Tenant's rights under this Article
shall be limited to Tenant's Termination Notice providing a Termination Date of
midnight prior to the seventh (7th) anniversary of the Term.

ARTICLE 35 - LIMITED EXPANSION RIGHT

      A. Provided Tenant is not then in default under this Lease Agreement
beyond the applicable grace period, Tenant shall have a first right of leasing
on the space(s) on the contiguous first and second floors of the Building
(hereafter referred to as the "Option Space"), in the event such Option Space
becomes "Available for Leasing" (as defined below) during the original Term,
subject to and conditioned upon the provisions of this Article (the "Expansion
Right").

      B. Landlord shall notify Tenant ("Landlord's Notice") in the event any
portion of the Option Space becomes "Available for Leasing"; or in the event
Landlord has a third party interested in leasing any portion of the Option Space
which is then "Available for Leasing". Tenant shall notify Landlord ("Tenant's
Leasing Notice") within five (5) business days after its receipt of Landlord's
Notice as to whether Tenant intends to exercise its Expansion Right with respect
to said Option Space as so identified in Landlord's Notice, time being of the
essence. If Tenant exercises its Expansion Right, it must do so with respect to
all the Option Space as so identified in Landlord's Notice. In such event,
Landlord and Tenant shall execute an amendment to the Lease Agreement
incorporating the Option Space as so identified into the Premises at the Minimum
Rent at the then applicable rates as set forth in the table of Paragraph 3B
above. In the event Tenant fails to notify Landlord within the time period set
forth above, Tenant's rights under this Article shall be null and void with
respect to any lease entered into with respect to the original prospective
Tenant for the Option Space as so identified in Landlord's Notice; provided such
Expansion Right shall again be applicable in the event Landlord does not lease
such Option Space to the original prospective Tenant within nine (9) months of
the Landlord's Notice.

      C. Tenant's Expansion Right shall also include Tenant's providing Landlord
a Tenant's Leasing Notice (in the first instance and not response to a
Landlord's Notice) with respect to any Option Space contiguous to the Premises
which is then "Available for Leasing" provided no Landlord's Notice has been
given to Tenant with respect to any portion of such Option Space within the
previous nine (9) months.

      D. The leasing of said Option Space shall commence as of the "Effective
Date" (as set forth below) and shall be in said Option Space's, then "AS-IS"
condition without any improvements, improvement allowances or other
modifications to be made by Landlord. For purposes of this Article, the
"Effective Date" shall mean the date on which Tenant shall begin paying rentals
upon the Option Space after it has exercised its rights to said space; which
shall be thirty (30) days after Tenant's Leasing Notice under this Article to
Landlord exercising its rights hereunder (or such sooner date as Tenant takes
possession of such Option Space). The provisions of this Lease Agreement
governing alterations of the Premises shall apply with respect to the
construction of any leasehold improvements Tenant desires to make to such Option
Space.

      E. Notwithstanding anything to the contrary in the foregoing, if Tenant
exercises its rights under this Article and there remains less than thirty-six
(36) months from the Effective Date to the expiration of the Term, then the
Tenant shall not be entitled to exercise its rights under this Article unless it
exercises its Option to Renew the Term.

      F. For purposes of this Article, "Available for Leasing" shall mean the
Option Space is contiguous to the Premises (either to the sides of the Premises
on the first floor of the Building, or immediately above the Premises on the
second floor of the Building) and not subject to any existing (as of the date of
this Lease Agreement) lease or first rights of refusal, first rights of
negotiation, first rights of leasing, expansion rights, renewal rights and/or
similar rights of any other third party tenant or such rights have been waived
in writing (provided if all such rights are to expire within six (6) months,
Landlord may make such Option Space Available for Leasing contingent upon the
expiration of such rights). In any event Landlord shall be entitled to renew or
extend any lease of an "Occupying Third Party" (as defined below), without
providing Tenant a Landlord's Notice and without it being subject to any rights
of Tenant under this Article. Tenants which are either presently occupying
Option Space or may be so occupying in the future pursuant to a third party
lease which was entered into after Tenant's rights were waived pursuant to
Paragraph B of this Article shall be deemed to be an "Occupying Third Party".

      G. If the Lease Agreement or Tenant's right to possession of the Premises
shall terminate in any manner whatsoever before Tenant shall exercise its rights
under this Article, or if Tenant shall have subleased or assigned all or any
portion of the Premises, then immediately upon such termination, sublease, or
assignment, then this Article and Tenant's rights hereunder shall simultaneously
terminate and become null and void. Such right is personal to Tenant. Under no
circumstances whatsoever shall the assignee under a complete or partial
assignment of the Lease, or a subtenant under a sublease of the Premises, have
any right to exercise any rights under this Article or have any right to receive
any Landlord's Notice.

                                       11
<PAGE>

          IN WITNESS WHEREOF, this Lease Agreement has been duly executed by the
          parties hereto as of the day and year indicated above.

TENANT: FRONTIER LOCAL SERVICES, INC.   LANDLORD: TIMESHARE SYSTEMS, INC.

By:__________________________________   By:___________________________________

Its:_________________________________   Its:__________________________________

By:__________________________________   By:___________________________________

Its:_________________________________   Its:__________________________________

DATE:________________________________   DATE:_________________________________

                              SCHEDULE OF EXHIBITS

               Exhibit A-1    Graphical depiction of Premises

               Exhibit A-2    Legal Description

               Exhibit B      License Agreement (Antenna)

               Exhibit C      License Agreement (Parking Lot Unassigned)

               Exhibit C-1    License Agreement (Parking Lot Assigned)

               Exhibit D      Rules and Regulations

                                       12
<PAGE>

                                   EXHIBIT A-1

                                (To be provided)

                                       13
<PAGE>

                                    EXHIBIT A-2

                                LEGAL DESCRIPTION

All of Block 7, Atwaters Addition to the Town of Minneapolis; all of Block 8,
Morrison, Smith and Hancocks Addition to Minneapolis; and that part of 12th
Avenue South, Morrison, Smith and Hancocks Addition to Minneapolis; and Atwaters
Addition to the Town of Minneapolis, lying Southwesterly of a line connecting
the most Easterly corner of Block 7, Morrison, Smith and Hancocks Addition to
Minneapolis; and the most Northerly corner of Block 8, Morrison, Smith and
Hancocks Addition to Minneapolis and Northeasterly of a line connecting the most
Southerly corner of Block 7, Atwaters Addition to the Town of Minneapolis and
the most Westerly corner of Block 8, Atwaters Addition to the Town of
Minneapolis and that part of Block 8, Atwaters Addition to the Town of
Minneapolis; except that part of said Block 8 which lies Northeasterly of the
following described line:

Beginning at a point on the Southeasterly line of Lot 7, Block 8, distant 116.50
feet Southwesterly of the most Easterly corner thereof; thence run Northwesterly
to a point on the Northwesterly line of the Southeasterly half of Lot 9, said
Block 8, distant 10 feet Southwesterly of the Northeasterly line of said Lot 9,
and there terminating.

Also except that part of the Northwesterly 1/2 of Lot 9, Block 8, Atwater's
Addition to the Town of Minneapolis which lies Northeasterly of the following
described line: Beginning at a point on the Southeasterly line of the
Northwesterly 1/2 of Lot 9, Block 8, said Addition, distant 5 feet Southwesterly
of the most Easterly corner thereof; thence run Northwesterly to the most
Northerly corner of Lot 9 and there terminating.

All of Block 7, Morrison, Smith and Hancocks Addition to Minneapolis, except
that part of Lots 9, 10, I I and 12 of said Block 7, described as follows:

Beginning at the most Northerly corner of said Lot 12; thence south 30 degrees
04 minutes 33 seconds West, on an assumed bearing, along the Northwesterly line
of said Lot 12, a distance of 127.58 feet; thence Easterly, a distance of 259.94
feet along a non-tangential curve concave to the South having a radius at 240.00
feet, a central angle of 62 degrees 03 minutes 21 seconds and the chord of said
curve bears North 89 degrees 04 minutes 43 seconds East; thence North 30 degrees
06 minutes 24 seconds East along the prolongation of a radial line of said
curve, a distance of 0.08 feet to the Northeasterly line of said Lot 9; thence
North 59 degrees 54 minutes 07 seconds West along the Northeasterly line of said
Block 7, a distance of 212.08 feet to the point of beginning.

All according to the plats thereof on file and of record in the Hennepin County
Recorders Office and in the Office of the Registrar of Titles, and situate in
Hennepin County, Minnesota.

Part of the above shown below as Parcels 1 through 4, is Registered Property as
evidenced by Certificate No. 830754. Said Registered Property is described as
follows:

Parcel 1: Lots 3, 6, 8 and 9, Block 7;

That part of Lot 7, Block 7 lying Northeasterly of a line drawn parallel with
and distant 96 feet Southwesterly of the Southwesterly boundary line of 5th
Street;

The Northeasterly 60 feet of the Southwesterly 105 feet of Lot 1, Block 8;

Lots 2, 3, 4, 5, 6 and l0, Block 8;

That part of the Northwesterly 1/2 of vacated 12th Avenue south lying between
the extensions across it of the Northeasterly and Southwesterly lines of said
Lot 6, Block 7 and

That part of the Southeasterly 1/2 of vacated 12th Avenue South lying between
the extensions across it of the Northeasterly and Southwesterly lines of said
Northeasterly 60 feet of the Southwesterly 105 feet of Lot 1, Block 8,

all in Atwaters Addition to the Town of Minneapolis.

Parcel 2: That part of the following described Tract:

The Northwesterly 27 feet of the Northeasterly 100 feet of Lot 7;

The Southwesterly 39 feet of the Northeasterly 139 feet of Lot 7;

The Northwesterly 1/2 of Lot 8 and

The Southeasterly 1/2 of Lot 9,

all in Block 8, Atwaters Addition to the Town of Minneapolis, which lies
Southwesterly of a line drawn from a point on the Southeasterly line of said Lot
7, distant 116.50 feet Southwesterly of the most Easterly corner thereof to a
point on the Northwesterly line of said Southeasterly 1/2 of Lot 9, distant 10
feet Southwesterly of the Northeasterly line thereof.

Parcel 3: Lots 3 and 8, Block 7,

That part of Lot 7, Block 7 lying Northeasterly of a line drawn parallel with
and distant 96 feet Southwesterly of the Southwesterly boundary line of 5th
Street

and

Lot 9, Block 7 except that part thereof lying Northerly of the following
described line: Beginning at the most Northerly corner of Lot 12, said Block 7;
thence South 30 degrees 04 minutes 33 seconds West, on an assumed bearing, along
the Northwesterly line of said Lot 12, a distance of 127.58 feet; thence
Easterly, distance of 259.94 feet along a non-tangential curve concave to the
South, having a radius, of 240.00 feet, a central angle of 62 degrees, 03
minutes, 21 seconds and the chord of said curve bears North 89 degrees, 04
minutes, 43 seconds East, thence North 30 degrees, 06 minutes, 24 seconds East
along the prolongation of a radial line of said curve, a distance of 0.08 feet
to the Northeasterly line of said Lot 9 and said line there terminating, all in
Morrison, Smith and Hancocks Addition to Minneapolis.

Parcel 4: That part of the Northwesterly 1/2 of vacated 12th Avenue south lying
between the extensions across it of the Northeasterly line of Lot 7, Block 7,
Morrison, Smith and Hancock's Addition to Minneapolis and a line drawn parallel
to and distant 96 feet Southwesterly of the Northeasterly line of said Lot 7

Subject to minerals and mineral rights reserved by the State of Minnesota; (As
to all of above land except Lot 3, Block 7 in Parcel 1; Lot 3, Block 7 in Parcel
3 and the above portion of Lot 9, Block 8 in Parcel 2; and except that part of
Lot 6, Block 7 and of that part of the Northwesterly 1/2 of vacated 12th Avenue
South in Parcel 1 lying Northeasterly of extensions across it of the
Southwesterly lien of said Lot 6 and its extension);

Subject to covenants, restrictions, reservations and conditions subsequent,
including a right of re-entry and forfeiture of title upon default as contained
in Deed Doc. No. 1488605; (See lnst)

                                       14

<PAGE>
                                    EXHIBIT B

                           ANTENNAE LICENSE AGREEMENT

      This License Agreement (the "Agreement"), dated as of this 14th day of
March, 1997, is between TIMESHARE SYSTEMS, INC. (the "Licensor"), having an
address at 511 Eleventh Avenue South, Minneapolis, MN. 55415 and FRONTIER LOCAL
SERVICES, INC. (the "Licensee"), having an address at 511 Eleventh Avenue South,
Minneapolis, MN, 55415 (the "Premises").

      A. Licensor agrees to permit Licensee to utilize for purposes provided
herein, the roof space (the exact location to be determined by Licensor with the
reasonable consent of Licensee, but in no event shall such space exceed 500
contiguous square feet) on the building ("Building") In which the Premises are
located (the "Roof Space"), from the date hereof and expiring August 31, 2017.
Upon termination of Licensee's lease for the Premises for any reason (including
the failure to renew the Term), this License Agreement arid the license created
hereby shall automatically expire with said termination. The termination,
cancellation or expiration of this License Agreement or the license created
hereunder shall not be cause or grounds for the cancellation or termination of
Licensee's lease for the Premises.

      B. Licensee may install, use and maintain on such Roof Space equipment
("Equipment") as described in Exhibit A attached hereto. If so requested by
Licensor, Licensee shall, at its sole expense, install a screening and
protective fence ("Fence") around the perimeter of the Roof Space. The Fence
style and installation shall be subject to Licensor's prior approval.

      C. Licensor agrees that Licensee may run cables (the "Cables") between the
Roof Space and the Licensee's Premises. Any damages to the Building or fixtures
or equipment located upon or within the Building resulting therefrom shall be
promptly repaired by Licensee.

      D. The Equipment and Fence shall remain the property of the Licensee or
its contractor. Licensee shall at its cost remove such Equipment and Fence (and
if so requested by Licensor, the Cables) at the expiration or sooner termination
of the license granted hereunder or this License Agreement, and restore the Roof
Space and Building to the condition they were in prior to Licensee's
installation of the Equipment, Fence and Cables. The obligations to remove the
Equipment, Fence and Cables and to restore and repair the Roof Space and
Building shall survive the expiration or sooner termination of the license and
this License Agreement.

      E. Licensee and/or its contractor shall bear all expenses in connection
with the installation, use and maintenance of such Equipment, Fence and Cables
and removal of the same. Licensee shall indemnify and hold Licensor harmless
from and against liability, damages, costs and expenses, including reasonable
attorneys' fees incurred by Licensor, arising out of Licensee's installation,
use, maintenance and removal of the Equipment, Fence and Cables. This obligation
shall survive the expiration, cancellation or termination of this License
Agreement and the license created hereunder.

      F. Licensee and/or its contractor shall maintain in force during the term
of this License Agreement comprehensive Liability insurance in amounts and in
such form as reasonably satisfactory to Licensor, protecting Licensor against
any liability, damages, cost or expenses, in connection with the installation,
use, maintenance and removal of the Equipment, Fence and Cables and shall supply
the appropriate certificates of such insurance upon request.

      G. Licensee and its contractors shall comply with all applicable federal,
state and local laws, regulations, and building codes in connection with the
installation, use, maintenance and removal of the Equipment, Fence and Cables.
In the event any such laws, regulations, or codes requires physical improvements
be made to the Building or other expenditures by or on behalf of the Building
and/or its owner, the costs of the same shall be borne by Licensee.
Notwithstanding the foregoing, any physical improvements, whether required by
law, regulation, code or otherwise, shall be subject to Licensor's approval,
which approval may be given or denied in Licensor's sole discretion. If any law,
regulation or code prohibits or disallows the Equipment, Fence and/or Cables or
the effective use of the license granted hereby, whether now or in the future,
Licensor shall be entitled to terminate the license granted hereby, without
penalty; and Licensee shall take such action so as to allow the Building to
again be in compliance with such law, regulation or code, including, if
necessary, the removal of the Equipment, Fence and/or Cables.

      H. Licensor agrees to permit Licensee reasonable access to the Roof Space
and other areas so as to facilitate the installation, use, maintenance and
removal of the Equipment, Fence, and Cables. Licensee shall have access to the
Roof Space on a 24 hour per day, 7 days per week basis, in order to facilitate
maintenance and repairs. Licensee agrees to sign the Building's log book on each
occasion Licensee enters the Roof Space, during normal business hours. At times
other than normal business hours, or when the Log book is not available for
signing, Tenant shall page Landlord at 470-4500 or shall leave a message by
calling 481-9999 or shall notify Landlord by such other reasonable means as
Landlord shall inform Tenant in writing.

      I. Notwithstanding anything else contained herein to the contrary, the
license granted herein is subject to the non' interference of Licensee's
Equipment with the normal operation, functioning and use of any other equipment
(whether owned by Licensor or by other licensees and/or tenants of Licensor)
currently existing upon the roof of the Building. In the event of any such
interference, Licensor may terminate the License granted hereunder if such
interference is not corrected within three (3) days notice from Licensor to
Licensee. Notwithstanding anything else contained herein to the contrary,
Licensor does not guaranty nor warrant the reception, noninterference or
effective use of Licensee's antenna, or Equipment, either at initial
installation nor thereafter.

      J. Licensee shall be required to get prior approval from Licensor
pertaining to the Antenna size, color, Fence specifications, location on roof,
method of mounting and the location of all Cables. In no instance shall this
installation breach or penetrate the roof membrane.

      K. Any notice required or desired under this License Agreement shall be
deemed sufficiently given if given in compliance with the Licensee's lease
agreement for the Premises.

      L. Licensee shall pay to Licensor, without set-off, or demand the sun of
$0 per month for all Antennae (as listed on Exhibit A, or otherwise located on
the Building pursuant to this License Agreement or the license created
hereunder) for use of the roof space ("License Fee") during the Term of this
License Agreement. Failure by Licensee to pay said License Fee shall entitle
Licensor, upon 10 days written notice to Licensee, to terminate this License
Agreement and the license created hereunder, and to such other relief as may be
allowed by law or equity. No other Equipment or antennae shall be permitted by
this license, without Licensor's prior written consent, which consent shall not
be unreasonably withheld for a reasonable increase in equipment, provided the
License Fee shall be increased to Licensor's then rate for each additional
antennae.

      M. In the event of default by Licensee of any of the terms and conditions
set forth in this License Agreement, whether suit be commenced or not, Licensee
agrees to pay the attorneys' fees, costs and expenses of Licensor incurred in
enforcing or attempting to enforce this License Agreement.

      N. Licensee shall operate the Licensee facilities in a manner that will
not cause interference to Licensor and other Licensees of the Property provided
that their installations predate that of the Licensee's facilities. All
operations by Licensee shall be in compliance with all Federal Communications
Commission ("FCC") requirements.

      O. Licensor waives any lien rights it may have concerning the Equipment
which are deemed Licensee's personal property and not fixtures, and Licensee has
the right to remove the same at any time without Licensor's consent.

      P. This Agreement may be terminated without further liability on thirty
(30) days prior written notice as follows: (i) by either party upon a default of
any covenant or term hereof by the other party, which default is not cured
within sixty (60) days of receipt of written notice or default provided that the
grace period for any monetary default is ten (10) days from receipt of notice;
or (ii) by Licensee for any reason or for no reason, provided Licensee delivers
written notice of early termination to Licensor with a thirty (30) day notice
provision prior to termination; or (iii) by Licensee if it does not obtain or
maintain any license, permit or other approval necessary for the construction
and operation of the Equipment; or (iv) by Licensee if Licensee is unable to
occupy and utilize the Premises under Licensee's lease due to an action of the
FCC, including without limitation, a take back of channels or change in
frequencies; or (v) by Licensee if Licensee determines that the Premises are not
appropriate for its operations for technological reasons, including, without
limitation, signal interference.

                                       i
<PAGE>

                                    Equipment

Up to 100 antennae as well as related base site cabinets and any other
appropriate ancillary equipment so long as it is contained within the 500 square
foot roof space and does not exceed 10 feet in height. No additional antennae
may be installed without Landlord's written consent.

<PAGE>

                                    EXHIBIT C
                                LICENSE AGREEMENT
                          MINNEAPOLIS TECHNOLOGY CENTER
                            PARKING LOT (UNASSIGNED)

      This License Agreement Is made as of this 14th day of March, 1997, by and
between TIMESHARE SYSTEMS, INC., a Minnesota corporation ("Licensor") and
FRONTIER LOCAL SERVICES, INC. ("Licensee"),

      In consideration of the covenants and agreements contained herein, and
other good and valuable consideration, receipt and sufficiency of which is
acknowledged, Licensor and Licensee mutually agree as follows:

      1. GRANT: Licensor hereby grants to Licensee, for the sole purpose of
parking the automobile(s) described in Licensee's application attached hereto,
_____________________ (___) unassigned parking space(s) in the restricted
parking areas of the West parking lot ("Lot") located at Minneapolis Technology
Center, 511 South Eleventh Avenue South, Minneapolis, Minnesota.

      2. TERM: The term of this License commences this date and expires at
midnight August 31, 2017.

      3. LICENSE FEE: Licensee shall pay as its fee for this License the sum of
$95 per admittance card on or before the first day of each month to Timeshare
Systems, Inc., 511 South Eleventh Avenue South, Minneapolis, Minnesota, 55415,
or at such other address that Licensor may designate; together with any use,
sales or other tax (excepting income tax) payable or which may become payable by
Licensor as a result of said fee. In the event the term of this License
commences on other than the first day of a month, the fee will be prorated for
such month. The license fee shall commence on the date Licensor delivers a Lot
gate operator(s) or admittance card(s) to Licensee. The license fee shall
terminate on the expiration date of the license or on the date the Licensee
returns the Lot gate operator(s) and/or admittance card(s) whichever occurs
last. The fee for this License may be adjusted from time to time beginning
September 1, 1998 to whatever fee Licensor is then charging for Lot parking
stalls; provided that Licensor shall give thirty (30) days prior written notice
of any such increase and Licensee may, within thirty (30) days subsequent to any
such increase, terminate this License by giving ten (10) days written notice to
Licensor.

      4. NEGATIVE COVENANTS: Licensee shall not:

            a) Park more than one (1) standard sized (or smaller) automobile per
admittance card in the Lot, at any one time.

            b) Allow any non-authorized automobile to be parked in the Lot
through use of Licensee's issued admittance card.

            c) Allow any automobile to be stored overnight in the Lot.

      Upon breach of any covenant set forth in this Paragraph 4 by Licensee,
Licensor may, at its option, and in addition to Licensor's remedies provided in
paragraph 5 hereof, charge Licensee the sum of $25.00 for each day of any such
violation, and/or may tow or have towed any automobile which is parked in
violation of any covenant set forth in this paragraph 4, and in such case
Licensee agrees to pay Licensor as an additional license fee hereunder all
towing and storage costs associated with said towing.

      5. RIGHT OF RE-ENTRY AND EXPIRATION: Licensee agrees that this License is
made upon the condition that if the Licensee shall fail to pay the license fee
within ten (10) days of when due, fail to keep any term or condition of this
license, or shall neglect or fail to keep, observe and perform any of the rules
and regulations from time to time adopted and promulgated by Licensor for the
operation of the Lot, then in any of said cases the Licensor may immediately or
at any time thereafter and without notice or demand, retake possession of the
parking stall(s), without such re-taking working a forfeiture of the license fee
to be paid by Licensee for the full term of this License. In the event of such
retaking or at the end of the Term, Licensee agrees to return to Licensor any
and all Lot gate operator(s) and/or admittance cards, upon notice from Licensor.
Licensee shall pay to Licensor, Licensor's replacement/lost fee for all such
operator(s) and/or admittance cards not returned.

      6. PARKING LOT OPERATION: It is specifically understood and agreed that
the Lot area is operated without constant staffing and that Licensor shall not
be responsible for any Loss, damage or casualty sustained by Licensee's
automobile or for the loss of any articles, personal property or any such other
items from Licensee's automobile.

      7. OFFICE LEASE: Licensee presently has (or is contemporaneously
executing) a lease for office space within the Minneapolis Technology Center
("Office Lease").

            a) A termination of the Office Lease, whether by expiration of the
term or otherwise, shall automatically constitute a termination of this License
Agreement.

      8. AUTHORIZED VEHICLES: Licensee agrees, upon request from Licensor, to
furnish Licensor or its authorized agent, the state automobile license number(s)
assigned to those automobile(s) of those persons employed on the premises and
who are designated by Licensee to use the Lot. Any such designation shall not
exceed the number of stalls licensed hereunder. If any automobile of Licensee or
of Licensee's officers, agents or employees who is not designated to park in the
Lot is parked therein, then Licensee shall pay to Licensor an amount equal to
$25 per day for each such vehicle for each day, or a part thereof, such amount
to be due and payable by Licensee within three (3) days after demand therefor.

      9. CANCELLATION: Licensor shall have the right, upon thirty (30) days
prior written notice to Licensee, to cancel this License Agreement and allow the
Parking Lot to be used on an unrestricted basis for all tenants and their
invitees. Licensee from and after the cancellation date specified in such
written notice, shall have no further obligation for the payment of the fee
hereunder but the use of such Parking Lot shall be subject to the terms of
paragraphs 4(c), 6 and 7 hereof.

      10. LICENSE HOURS: Notwithstanding anything else contained herein to the
contrary, the license granted hereunder shall be limited to the following hours:
Monday through Friday (legal holidays specifically excluded) from 7:00 a.m. to
6:00 p.m. Licensee specifically agrees that should Licensee violate the
foregoing hours during a time period in which there is an event ("Event") at the
Hubert H. Humphrey Metrodome (located across 11th Avenue from the Minneapolis
Technology Center) Licensee shall pay to Licensor $25.00 for each such Event
violation (or such higher rate which Licensor may then be charging for dome
Event parking).

(LICENSEE)                       (LICENSOR)

FRONTIER LOCAL SERVICES, INC.    TIMESHARE SYSTEMS, INC.

By____________________________   By___________________________________

Its___________________________   Its__________________________________

Date:_________________________   Date:________________________________

                                       1
<PAGE>

                                    EXHIBIT D

                              RULES AND REGULATIONS

      1. No sign, placard, picture, advertisement, name or notice shall be
installed or displayed on any part of the outside or inside of the Building
without the prior written consent of the Landlord. Landlord shall have the right
to remove, at Tenant's expense and without notice, any sign installed or
displayed in violation of this rule. All approved signs or lettering on doors
and walls shall be printed, painted, affixed or inscribed at the expense of
Tenant by a person or vendor chosen by Landlord. In addition, Landlord reserves
the right to change from time to time the format of the signs or lettering and
to require previously approved signs or lettering to be appropriately altered.

      2. If Landlord objects in writing to any curtains, blinds, shades or
screens attached to or hung in or used in connection with any window or door of
the Premises, Tenant shall immediately discontinue such use. No awning shall be
permitted on any part of the Premises. Tenant shall not place anything or allow
anything to be placed against or near any glass partitions or doors or windows
which may appear unsightly, in the opinion of Landlord, from outside the
Premises.

      3. Tenant shall not obstruct any sidewalks, halls, passages, exits,
entrances, elevators, escalators or stairways of the Building. The halls,
passages, exits, entrances, shopping malls, elevators, escalators and stairways
are not for the general public, and Landlord shall in all cases retain the right
to control and prevent access to the Building of all persons whose presence in
the judgment of Landlord would be prejudicial to the safety, character,
reputation and interests of the Building and its tenants provided that nothing
contained in this rule shall be construed to prevent such access to persons with
whom any tenant normally deals in the ordinary course of its business, unless
such persons are engaged in illegal activities. No tenant and no employee or
invitee of any tenant shall go upon the roof of the Building,

      4. The directory of the Building will be provided exclusively for the
display of the name and location of tenants only and Landlord reserves the right
to exclude any other names therefrom.

      5. Tenant shall not cause any unnecessary labor by carelessness or
indifference to the good order and cleanliness of the Premises. Landlord shall
not in any way be responsible to any Tenant for any loss of property on the
Premises, however occurring, or for any damage to any Tenant's property by the
janitor or any other employee or any other person.

      6. Landlord will furnish Tenant free of charge with two keys to each door
in the Premises. Landlord may make a reasonable charge for any additional keys,
and Tenant shall not make or have made additional keys, and Tenant shall not
alter any lock or install a new or additional lock or bolt on any door of its
Premises. Tenant, upon the termination of its tenancy, shall deliver to Landlord
the keys of all doors which have been furnished to Tenant, and in the event of
loss of any keys so furnished, shall pay Landlord therefor.

      7. If Tenant requires telegraphic, telephonic, burglar alarm or similar
services, it shall first obtain, and comply with, Landlord's instructions in
their installation.

      8. No equipment, materials, furniture, packages, supplies, merchandise or
other property will be received in the Building or carried in the elevators
except between such hours and in such elevators as may be designated by
Landlord.

      9. Tenant shall obtain Landlord's consent prior to placing a load upon any
floor which may exceed the load per square foot which such floor was designed to
carry and which is allowed by law. Landlord shall have the right to prescribe
the weight, size and position to all equipment, materials, furniture or other
property brought into the Building, Heavy objects shall stand on such platforms
as determined by Landlord to be necessary to properly distribute the weight.
Business machines and mechanical equipment belonging to Tenant which cause noise
or vibration that my be transmitted to the structure of the Building or to any
space in the Building to such a degree as to be objectionable to Landlord or to
any tenant shall be placed and maintained by Tenant, at Tenant's expense on
vibration eliminators or other devices sufficient to eliminate noise or
vibration. The persons employed to move such equipment in or out of the Building
must be acceptable to Landlord. Landlord will not be responsible for loss of, or
damage to, any such equipment or other property from any cause, and all damage
done to the Building by maintaining or moving such equipment or other property
shall be repaired at the expense of Tenant.

      10. Tenant shall not waste electricity, water or air conditioning. Tenant
shall keep corridor doors closed.

      11. Landlord reserves the right to exclude from the Building between the
hours of 6 p.m. and 7 a.m. the following day, or such other hours as may be
established from time to time by Landlord, and on Sundays and legal holidays any
person unless that person is known to the person or employee in charge of the
Building as being an employee of Tenant and has a pass or is properly
identified. Tenant shall be responsible for all persons for whom it requests
passes and shall be liable to Landlord for all acts of such persons. Landlord
shall not be liable for damages for any error with regard to the admission to or
exclusion from the Building of any person.

      12. Tenant shall close and lock the doors of its Premises and entirely
shut off all water faucets or other water apparatus and electricity, gas or air
outlets before Tenant and its employees leave the Premises. Tenant shall be
responsible for any damage or injuries sustained by other tenants or occupants
of the Building or by Landlord for noncompliance with this rule.

      13. The toilet rooms, toilets, urinals wash bowls and other apparatus
shall not be used for any purpose other than that for which they were
constructed, no foreign substance of any kind whatsoever shall be thrown into
any of them, and the expense of any breakage, stoppage or damage resulting from
the violation of this rule shall be borne by the Tenant who, or whose employees
or invitees, shall have caused it.

      14. Tenant shall not install any radio or television antenna, satellite
dish, loudspeaker or other device on the roof or exterior walls of the Building
except by virtue of a separate license negotiated with Landlord. Tenant shall
not interfere with radio or television broadcasting or reception from or in the
Building or elsewhere.

      15. Except as approved by Landlord, Tenant shall not mark, drive nails,
screw or drill into the partitions, woodwork or plaster or in any way deface the
Premises. Tenant shall not cut or bore holes for wires. Tenant shall not affix
any floor covering to the floor of the Premises in any manner except as approved
by Landlord. Tenant shall repair any damage resulting from noncompliance with
this rule.

      16. No animals are allowed in the Building with the exception of
seeing-eye or hearing animals. In the event any injuries are caused to Tenant's
employees or invitees, the owner of said animal agrees to indemnify and hold the
Landlord and its managing agent and all other tenants harmless from all costs
(including reasonable attorneys' fees) with respect to the presence of any
animals in the Building.

      17. Tenant shall store all its trash and garbage within its Premises.
Tenant shall not place in any trash box or receptacle any material which cannot
be disposed of in the ordinary and customary manner of trash and garbage
disposal. All garbage and refuse disposal shall be made in accordance with
directions issued from time to time by Landlord.

      18. No cooking shall be done or permitted by any Tenant on the Premises,
except by the Tenant of Underwriters' Laboratory approved microwave oven or
equipment for brewing coffee, tea, hot chocolate and similar beverages shall be
permitted provided that such equipment and use is in accordance with all
applicable federal, state and city laws, codes, ordinances, rules and
regulations.

      19. Tenant shall not use in any space or in the public hails of the
Building any hand trucks except those equipped with the rubber tires and side
guards or such other material-handling equipment as Landlord may approve. Tenant
shall not bring any other vehicles of any kind into the Building.

      20. Tenant shall not use the name of the Building in connection with or in
promoting or advertising the business of Tenant except as Tenant's address.

                                       i
<PAGE>

      21. The requirements of Tenant will be attended to only upon appropriate
application to the office of the Building by an authorized individual. Employees
of Landlord shall not perform any work or do anything outside of their regular
duties unless under special instruction from Landlord, and no employee of
Landlord will admit any person (Tenant or otherwise) to any office without
specific instructions from Landlord.

      22. Parking is allowed between the hours of 7:00 a.m. to 6:00 p.m., Monday
through Friday, holidays excepted, in the east parking lot only, subject to
availability and at such rates as Landlord is then charging. Notwithstanding the
foregoing, no parking is allowed during professional sporting events and/or
other events occurring at the Hubert H. Humphrey Metrodome located at across
11th Avenue South from the Building. All visitors to the Building parking in
such parking lot shall pay the then prevailing parking charges. Any visitor
drop-offs are allowed only on the east side of the Building. Notwithstanding the
foregoing, parking by Tenant pursuant to a specific license agreement shall be
24 hours per day, 7 days a week.

      23. Landlord may waive any one or more of these Rules arid Regulations for
the benefit of any particular tenant or tenants, but no such waiver by Landlord
shall be construed as a waiver of such Rules and Regulations in favor of any
other tenant or tenants, nor prevent Landlord from thereafter enforcing any such
Rules and Regulations against any or all of the tenants of the Building. The
foregoing shall not be construed to allow Landlord to discriminatorily enforce
these Rules and Regulations as against Tenant and not other tenants of the
Building.

      24. These Rules and Regulations are in addition to, and shall not be
construed to in any way modify or amend, in whole or in part, the terms,
covenants, agreements and conditions of any lease of premises in the Building.

      25. Landlord reserves the right to make such other and reasonable rules
and regulations as in its judgment may from time to time be needed for safety
and security, for care and cleanliness of the Building and for the preservation
of good order in and about the Building. Tenant agrees to abide by all such
rules and regulations in this Exhibit stated and any additional rules and
regulations which are adopted.

      26. Tenant shall be responsible for the observance of all of the foregoing
rules by Tenant's employees, agents, clients, customers, invitees and guests.

  8/04/97, LBG, 718651M

                                       ii

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00007-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00007-of-00352.parquet"}]]