EXHIBIT 10.14

                                LEASE AGREEMENT

                           UNIVERSITY BUSINESS PARK


STATE OF TEXAS

COUNTY OF BEXAR


     This Lease Agreement (the "Lease"), made and entered into by and between
UBP PARTNERS LIMITED, a Texas partnership (hereinafter referred to as 
"Landlord") and LatinAmerica Telecomm, Inc. a           Corporation hereinafter
                ---------------------------------------------------- 
referred to as "Tenant");

                             W I T N E S S E T H:
                             - - - - - - - - - -


     1.   Definitions.  For the purpose of this Lease, the following terms
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shall have the meanings hereinafter specified:

          (a)  Landlord:      UBP PARTNERS LIMITED
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          (b)  Tenant:        Latin America Telecomm, a         Corporation
               ------        ------------------------------------------------- 

          (c)  Project:       UNIVERSITY BUSINESS PARK
               -------       -------------------------- 

          (d)  Premises: Approximately 4,000 square feet situated within a 
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     building comprising a part of the Project, such Premises being the area
     indicated on the site plan attached hereto as Exhibit "A-2", and also known
     as Suite  407. The gross leasable area of the Premises is hereby stipulated
              ----
     for all purposes to be  4,000 square feet. The Premises represent .044
                            ------                                     ----  
     percent of the area of the Project which shall be Tenant's Proportionate
     Share.

          (e)  Term: Subject to and upon the conditions set forth herein, the
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     Term of this Lease shall commence on May 1  1994 and shall terminate sixty
                                          ------,  --                     -----
     (60) months thereafter on April 30 , 1999
     -----                    ----------     -

          (f)  Base Rent: Subject to the provisions of the Notice of Completion
               ---------
     and Rental Payment Schedule to be attached hereto as Exhibit "F", Base Rent
     shall be payable to Landlord according to the following schedule:

 
 
          Month            Rental Amount        Annual Rental      Rent PSF
          -----            -------------        -------------      --------
                                                           
           1-24            $1,400.00            $16,800.00         $4.20
          25-48            $2,000.00            $24,000.00         $6.00
          49-60            $2,333.34            $28,000.00         $7.00


          Total rent due during Lease Term: $109,600.00


          (g)  Security Deposit is $ O .
               -----------------    ---    

          (h)  Purpose of Tenancy:  Offices for telecommunication operation.
               ------------------- -------------------------------------------- 

          (i)  Common Areas: All parking areas, sidewalks, driveways, 
               ------------
     landscaped areas and other common facilities described in Paragraph 19 of
     this Lease Agreement and such other areas and facilities within the
     Project that the Landlord shall from time to time designate as being for
     the mutual use of the Tenants of the Project.

          (j)  Common Expenses: Those expenses incurred by Landlord in operating
               ---------------
     the Project which are more particularly described in Paragraph 4 of this
     Lease Agreement

          (k)  Rent: The sum of Base Rent plus Tenant's Proportionate Share of 
               ----
     Common Expenses as described in paragraph 4 of this lease.

          (l)  Initial Common Area Charge: $106.00(.04 psf).
               --------------------------  ----------------

     2.   Premises and Term. In consideration of the obligation of Tenant to pay
          -----------------
Rent as herein provided,

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and in consideration of the other terms, provisions and covenants hereof,
Landlord hereby demises and leases to Tenant and Tenant hereby takes from
Landlord the Premises, and to HAVE AND TO HOLD the same for the Term specified
in Section 1.(e), commencing on the Commencement Date herein specified. TENANT
ACKNOWLEDGES THAT IT HAS INSPECTED THE PREMISES AND ACCEPTS THE PREMISES IN
THEIR PRESENT CONDITION AS SUITABLE FOR THE PURPOSE FOR WHICH THE PREMISES ARE
LEASED; AND FURTHER ACKNOWLEDGES, THAT NO REPRESENTATIONS AS TO THE REPAIR OF
THE PREMISES NOR PROMISES TO ALTER, REMODEL OR IMPROVE THE PREMISES HAVE BEEN
MADE BY LANDLORD EXCEPT AS SET OUT IN SECTION 12 OF THIS LEASE. If this Lease is
executed before the Premises become vacant or otherwise available and ready for
occupancy by Tenant, including the Landlord's completion of the Tenant finish
out required under Section 12 of this Lease, or if any present tenant or
occupant of the Premises holds over and Landlord cannot acquire and deliver to
Tenant possession of the Premises prior to the date above recited as the
Commencement Date of this lease, Landlord shall not be deemed to be in default
hereunder or responsible for any claims, damages or liabilities in connection
therewith, or by reason thereof. Tenant agrees to accept possession of the
Premises at such time as Landlord is able to tender the same to Tenant, in which
event, the date of tender of the Premises by the Landlord to Tenant shall be the
Commencement Date unless the delay in tender is due to Tenant's actions, in
which event the Commencement Date shall not be altered; and Landlord hereby
waives payment of Rent covering any period prior to the tendering of possession
to Tenant hereunder. Tenant's failure to occupy the Premises when tendered by
Landlord upon completion of the Landlord's improvements shall not delay the
Commencement Date.


     3.   Base Rent: Tenant agrees to pay monthly as Base Rent during the term 
          ---------                                                     
of this Lease the sum of money set forth in Section 1.(f) of this Lease, which
amount shall be payable to Landlord at the address shown in section 30. The
initial monthly installment of Base Rent shall be due and payable upon the
execution of this Lease and future monthly installments shall be due and payable
on or before the first day of each calendar month succeeding the Rental
Commencement Date during the term of this Lease; provided, if the Commencement
Date should be a date other than the first day of a calendar month, the monthly
rental set forth above shall be prorated to the end of that calendar month, and
all succeeding installments of Rent shall be payable on or before the first day
of each succeeding calendar month during the term of this Lease. Tenant shall
pay, as additional rent, all other sums due under this Lease. Unless otherwise
specifically allowed by the hereinafter enumerated terms of this Lease, the
Tenant shall pay the Rent and other sums payable hereunder without notice or
demand and without regard to any counterclaim, right or set off, deduction or
defense Tenant may have against Landlord, and without abatement, suspension,
deferment, diminution or reduction; and, the obligations of Tenant hereunder
shall not be in any way affected or reduced by any restriction, prevention or
curtailment of or interference with any use of the Project, Premises, or any
part thereof for any reason whatsoever.


     4.   Common Expenses.  "Common Expenses," as used herein, shall consist of 
          ----------------                                           
certain operating expenses of the Project, and shall consist of expenditures by
Landlord to keep and maintain all facilities in operation at the beginning of
the Term of the Lease and such additional facilities in subsequent years as may
be determined by Landlord to be necessary or beneficial for the operation of the
Project. All operating expenses shall be determined in accordance with generally
accepted cash or accrual (at Landlord's option) accounting principles which
shall be consistently applied. The Term "Common Expenses," as used herein, shall
mean all expenses, costs, and disbursements (but not the cost of capital
improvements originally installed in the Project by Landlord, nor specific costs
especially billed to and paid by specific tenants) of every kind and nature
which Landlord shall pay or become obligated to pay because of or in connection
with the ownership and operation of the Project, including, but not limited to,
the following:

          (a)  Cost of all utilities for the Project not separately metered to
     the tenants.

          (b)  Cost of providing those Landlord services to the Project
     prescribed in Paragraph 18 hereof.

          (c)  Lighting, planting, cleaning, policing, inspecting, landscaping
     and repairing the Common Areas.

          (d)  Pest control expenditures attributable to the Project.

          (e)  Except as otherwise provided in this Lease, cost of repairs
     (structural and nonstructural) and general maintenance of the Project
     (excluding repairs and general maintenance paid by proceeds of insurance or
     by Tenant or other third parties, and alterations attributable solely to
     other tenants of the Project).

          (f)  Heating, ventilation and air conditioning maintenance contract.

          (g)  A reasonable management fee for managing the Project.

          Such common expenses shall not include taxes and insurance. Prior to 
January 1 of each calendar year or at any tine during Tenant's occupancy, 
Landlord reserves the right to provide an estimate of Common Expenses for the 
forthcoming calendar year, whereupon, upon receipt of Notice by Landlord, Tenant
shall pay an amount equal to the product of Tenant's Proportionate Share 
multiplied by Landlord's estimate of Common

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Expenses for the forthcoming calendar year.

          By June 1 of each calendar year during Tenant's occupancy, or as soon
thereafter as possible, or upon initial occupancy of the Premises by Tenant, for
the remainder of the calendar year in which Tenant first occupies the Premises.
Landlord shall furnish to Tenant a statement of Landlord's actual Common
Expenses for the previous calendar year. A lump sum payment or credit (which
payment or credit shall be deemed a payment of or credit against the Rent
payable hereunder for all purposes) will be made from Tenant to Landlord in the
case of a payment, and from Landlord to Tenant, in the case of a credit, within
thirty (30) days of the delivery of such statement, equal to the difference
between the product of Tenant's Proportionate Share times Landlord's actual
Common Expenses for the previous calendar year minus the amount already paid by
Tenant pursuant to the immediately preceding paragraph. The effect of this
reconciliation payment is that Tenant will pay during the Term of this Lease,
its Proportionate Share of Common Expenses.


     5.   Security Deposit.  The Security Deposit set forth in 1.(g) above 
          ----------------
shall be held by Landlord for the performance of Tenant's covenants and
obligations under this Lease, it being expressly understood that the deposit
shall not be considered an advance payment of rental or a measure of Landlord's
damage in case of default by Tenant. Upon the occurrence of any event of default
by Tenant or breach by Tenant of Tenant's covenants under this Lease, Landlord
may, from time to time, without prejudice to any other remedy, use the Security
Deposit to the extent necessary to make good any arrears of rent, or to repair
any damage or injury, or pay any expense or liability incurred by Landlord as a
result of the event of default or breach of covenant, and any remaining balance
of the Security Deposit shall be returned by Landlord to Tenant upon termination
of this Lease. If any portion of the Security Deposit is so used or applied,
Tenant shall upon ten days written notice from Landlord, deposit with Landlord
by cash or cashier's check an amount sufficient to restore the Security Deposit
to its original amount.


     6.   Holding Over.  In the event that Tenant does not vacate the Premises 
          ------------
upon the expiration or termination of this Lease, Tenant shall be a tenant at
will for the holdover period and all of the terms and provisions of this Lease
shall be applicable during that period, except that Tenant shall pay Landlord as
Base Rent for the period of such holdover an amount equal to two times the Rent
which would have been payable by Tenant had the holdover period been a part of
the original term of this Lease. Tenant agrees to vacate and deliver the
Premises to Landlord upon Tenant's receipt of notice from Landlord to vacate.
The Rent payable during the holdover period shall be payable to Landlord on
demand. No holding over by Tenant, whether with or without the consent of
Landlord, shall operate to extend the term of this Lease.


     7.   Use.  Tenant warrants and represents to Landlord that the Premises
          ---
shall be used and occupied only for the purpose as set forth in Section 1.(h).
Tenant shall occupy the Premises, conduct its business and control its agents,
employees, invitees and visitors in such a manner as is lawful, reputable and
will not create a nuisance. Tenant shall not permit any operation which emits
any odor or matter which intrudes into other portions of the Project, use any
apparatus or machine which makes undue noise or causes vibration in any portion
of the Project or otherwise interfere with, annoy or disturb any other lessee in
its normal business operations or Landlord in its management of the Project.
Tenant shall neither permit any waste on the Premises nor allow the Premises to
be used in any way which would, in the opinion of Landlord, be extra hazardous
on account of fire or which would in any way increase or render void the fire
insurance on the Project. If at any time during the term of this Lease the State
Board of Insurance or other insurance authority or imposes an additional penalty
or surcharge in Landlord's insurance premiums because of Tenant's original or
subsequent placement or use of storage racks or bins, method of storage or
nature of Tenant's inventory or any other act of Tenant, Tenant agrees to pay as
additional rent the increase in Landlord's insurance premiums.


     8.   Signs.  No sign of any type or description shall be erected, placed or
          -----
painted in or about the Premises or project except those signs submitted to
Landlord in writing and approved by Landlord in writing, and which signs are in
conformance with Landlord's sign criteria established for the project. Tenant
shall remove such signs at the termination of this Lease without defacing the
building.


     9.   Compliance with Laws, Rules and Regulations.  Tenant, at Tenant's sole
          -------------------------------------------
cost and expense, shall comply with all laws, ordinances, orders, rules and
regulations of state, federal, municipal or other agencies or bodies having
jurisdiction over use, condition and occupancy of the Premises. Tenant will
comply with the Rules and Regulations of the project adopted by Landlord which 
are set forth on a Exhibit D attached to this Lease. Landlord shall have the 
right at all times to change and amend the Rules and Regulations in any 
reasonable manner as may be deemed advisable for the safety, care, cleanliness, 
preservation of good order and operation or use of the Project or the Premises. 
All changes and amendments to the Rules and Regulations of the Project will be 
sent by Landlord to Tenant in writing and shall thereafter be carried out and 
observed by Tenant. In addition to the foregoing, Landlord shall bare the 
continuing obligation during the Lease Term to ensure that the Premises and the 
Project are at all times in compliance with all laws, regulations  and 
ordinances including the provisions of the Americans with Disabilities Act.

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     10.  Warranty of Possession.  Landlord warrants that it has the right and
          ----------------------                                              
authority to execute this Lease, and Tenant, upon payment of the required rents
and subject to the terms, conditions, covenants and agreements contained in this
Lease, shall have possession of the Premises during the full term of this Lease
as well as any extension or renewal thereof. Landlord shall not be responsible
for the acts or omissions of any other lessee or third party that may interfere
with Tenant's use and enjoyment of the Premises.


     11.   Inspection.  Landlord or its authorized agents shall at any and all
           ----------                                                         
reasonable times have the right to enter the Premises to inspect the same, to
supply janitorial service or any other service to be provided by Landlord, to
show the Premises to prospective purchasers or lessees, and to alter, improve or
repair the Premises or any other portion of the Project. Tenant hereby waives
any claim for damages for injury or inconvenience to or interference with
Tenant's business, any loss of occupancy or use of the Premises, and any other
loss occasioned thereby. Landlord shall at all times have and retain a key with
which to unlock all of the doors in, upon and about the Premises. Tenant shall
not change Landlord's lock system or in any other manner prohibit Landlord from
entering the Premises, except as may be provided in this Lease or Landlord's
written Rules and Regulations. Landlord shall have the right to use any and all
means which Landlord may deem proper to open any door in an emergency without
liability therefore. Notwithstanding the above, Tenant may secure the storage
and computer room within the Demised Premises.


     12.  Landlord's Improvements.  Landlord shall construct the finish-out
          -----------------------                                      
work (hereinafter "Tenants Improvements") pursuant to the Final Working
Drawings, now or to be hereafter attached as Exhibit "C" pursuant to the terms
and conditions of Landlord's Workletter attached as Exhibit "B".

          In the event of any delay in the completion of Tenant's Improvements
caused by Tenant, Landlord shall not be liable for any damage caused thereby. In
the event Tenant takes occupancy prior to the completion of Landlord's
Improvements, Tenant shall provide uninterrupted access to the Premises to
Landlord, its employees, agents, representatives and governmental inspectors at
all reasonable times.

          Upon Landlord and Tenant's approval in writing of the final plans and
specifications of Tenant's Improvements, including the improvements described in
Exhibit "C", Landlord shall promptly commence work on such improvements and
shall thereafter diligently pursue the completion thereof. The time period for
completion of the Tenant's Improvements shall be extended by any changes in the
work requested by Tenant, any delays beyond Landlord's reasonable control in
securing materials for the improvements, or permits from governmental
authorities having jurisdiction over Landlord's work, and any delays caused by
Tenant or Tenant's contractors. Tenant shall coordinate its work schedule for
improvements being constructed by Tenant and Tenant's "move in" activities with
the Landlord so as not to unreasonably interfere with the completion of the
Tenant's Improvements.


     13.  Utilities and Services.
          ---------------------- 

          (a)  Utility Services.  Landlord shall provide or cause to be provided
               ----------------                                                 
     the mains, conduits and other facilities necessary to supply water, gas,
     electricity, telephone service and sewage service to the Leased Premises.
     Tenant shall, however, be responsible, at its expense, to make provisions
     for connecting or hooking up to such utilities, directly with the
     appropriate utility company furnishing same.

          (b)  Responsibility for Charges.  Landlord, subject to Section C, 
               -------------------------- 
     below, shall bear the cost of water sewage services provided to the Leased
     Premises. Tenant shall promptly pay all charges and deposits for
     electricity, gas, and telephone service and all other utilities (except for
     water and sewage) furnished to the Leased Premises. Landlord may, if it so
     elects, furnish one or more utility services to Tenant, and in such event,
     Tenant shall purchase the use of such services as are tendered by Landlord,
     and shall pay on demand the rates established therefor by Landlord which
     shall not exceed the rates which would be charged for the same services if
     furnished to Tenant directly by the local public utility furnishing the
     same to the public at large. Landlord may at any time discontinue
     furnishing any such service without obligation to Tenant other than to
     connect the Leased Premises to the public utility, if any, furnishing such
     service.

          (c)  Landlord's Services.  Landlord shall provide routine maintenance,
               -------------------   
     painting and electric lighting service for all Common Areas and special
     service areas of the Property in the manner and to the extent deemed by
     Landlord to be standard. Landlord may, in its sole discretion, provide
     additional services not enumerated herein.

          (d)  Excessive Utility Consumption.  Tenant shall pay all water and
               -----------------------------
     sewage costs occasioned by high consumption for such services, as
     determined by Landlord, including (without limitation) the cost of
     installing, servicing and maintaining any special or additional inside or
     outside lines, meters or submeters, or the cost of any other equipment
     necessary to increase the amount or type of water and sewage services
     available to the Leased Premises.

          (e)  Window Coverings.  Landlord may (but shall not be obligated to) 
               ----------------
     furnish and install window coverings on all exterior windows to maintain a 
     uniform exterior appearance. Tenant shall not

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     remove or replace these window coverings or install any other window
     covering which would affect the exterior appearance of the Building. Tenant
     may install lined or unlined over draperies on the interior sides of the
     Landlord furnished window coverings for interior appearance or to reduce
     light transmission, provided such over draperies do not (in Landlord's
     determination) affect the exterior appearance of the Building or affect the
     operation of the Building's heating, ventilating and air conditioning
     systems.

          (f)  No Liability.  Landlord shall not be liable for any interruption
               ------------                                                    
     whatsoever in utility service not furnished by it, nor for interruptions in
     utility service furnished by it which are due to fire, accident, strikes,
     acts of God, riot, civil commotion, terrorist act, national emergency,
     shortages of labor or materials, or other causes beyond the control of
     Landlord or in order to make alterations, repairs or improvements.
     Moreover, Landlord shall not be liable for any interruption of such utility
     services which continues during any reasonable period necessary to restore
     such service upon the occurrence of any of the foregoing conditions.
     Failure by Landlord to any extent to provide any service of Landlord
     specified herein or any other services not specified, or any cessation
     thereof, shall not render Landlord liable in any respect for damages to
     either person or property, be construed as an eviction of Tenant, work an
     abatement of rent or relieve Tenant form fulfillment of any covenant in
     this Lease. If any of the equipment or machinery necessary or useful for
     provision of any utility services, and for which Landlord is responsible,
     breaks down, or for any cause ceased to function properly, Landlord shall
     use reasonable diligence to repair the same promptly, but Tenant shall have
     no claim for rebate of rent or damages on account of any interruption in
     service occasioned from the repairs. Notwithstanding the above, if
     electrical service is disrupted for a continuous period of at least five
     (5) full days because of Landlord's negligence, Tenant may provide Landlord
     with written notice of such fact, afterwhich Landlord shall have forty-
     eight (48) hours to restore service to the Premises. In the event
     electrical service is not restored within said fortyeight (48) hour
     period, Tenant, at Tenant's sole option, may terminate this Lease.

          (g)  Theft or Burglary.  Landlord shall not be liable to Tenant for 
               ----------------- 
     losses to Tenant's property or personal injury caused by criminal acts or
     entry by unauthorized persons into the Leased Premises or the Property.


     14.  Taxes.
          ----- 

          (a)  The maximum amount of taxes levied or assessed against the real
     property of which the Premises are a part during any one real estate tax
     year to be paid by Landlord shall be a total of the actual calendar year
     1994 real estate tax expense for the Project. If, in any real estate tax
     year during the term hereof or any renewal or extension of this Lease, the
     ad valorem taxes levied or assessed against the Premises for such tax year
     shall exceed such specified sum, Tenant shall pay to Landlord upon demand
     within thirty (30) days the amount for such excess. In the event the
     Premises constitute a portion of a multiple occupancy building, Tenant
     agrees to pay to Landlord upon demand the amount of Tenant's proportionate
     share of such excess (with respect to taxes lawfully levied or assessed
     against the building and grounds, parking areas, driveways, and alleys
     around the said building), such share to be calculated by Landlord as .044
                                                                           ----

          (b)  Tenant shall pay before delinquent all taxes, assessments, and
     other charges that are levied against Tenant's personal property installed
     or located in or on the Premises that become due and payable during the
     Term hereof.


    15.   Landlord's Repairs.  Landlord shall, at its expense, keep and 
          ------------------                                           
maintain the roof, foundation, and the structural soundness of the exterior
walls of the building in good repair, reasonable wear and tear excepted.
Landlord expressly reserves the right to use all exterior walls and the roof of
the building of which the Premises are a part. Tenant shall repair and pay for
any damage caused by the negligence of Tenant, or Tenant's employees, agents or
invitees, or caused by Tenant's default hereunder. The term "walls," as used
herein, shall not include windows, glass and plate glass, stairways, doors or
special storefronts. Tenant shall immediately give Landlord written notice of
defect or need for repairs, after which Landlord shall have a reasonable
opportunity to repair same or cure such defect. Landlord's liability hereunder
shall be limited to the cost of such repairs or curing such defect. Landlord
shall not be liable for damage to Tenant's Improvements, inventory and equipment
within the Premises. In the event the Premises have air conditioning and heating
systems, or fire sprinkler systems installed therein on the date of this Lease,
then Landlord represents that on the Commencement Date of this Lease, such air
conditioning and heating systems and sprinkler systems shall be in good
operating condition; provided, however, that during the Term of this Lease,
Tenant shall, at its own cost and expenses, maintain such systems in good 
operating condition, shall make all necessary repairs and replacements, and upon
termination of this Lease, shall deliver such system to Landlord in good 
operating condition.


     16.  Tenant's Repairs.  Tenant shall, at its own cost and expense, keep and
          ----------------
maintain (including periodic cleaning and preventative maintenance) all other 
parts of the Premises in good repair and condition, including, but not limited 
to, windows, glass and plate glass, doors, any special storefront, interior 
walls and finish work, stairways, floors and floor covering, downspouts and 
gutters, dock boards, plumbing work and fixtures, all lighting and all 
electrical systems and the HVAC systems within the Premises and shall take good 
care of the Premises and

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its fixtures; and Tenant shall not permit the Premises to suffer waste. Tenant
shall further be responsible for all damages to the exterior and other portions
of the building of which the Premises are a part, which are caused by Tenant,
Tenant's employees, invitees and guests. Landlord shall make available to Tenant
any and all warranties and guaranties of construction and materials of the
improvements on the Premises and the building in which the same are situated,
and the equipment situated therein. Tenant shall not be obligated to repair any
damage caused by fire, tornado or other casualty covered by items set forth
under the extended coverage provisions of Landlord's fire insurance policy.
Tenant shall not be permitted to dump or drain any garbage, waste water, refuse,
liquids or any other materials directly onto the parking lot surface surrounding
the building in which the Premises are situated or anywhere in the Project
without the prior written consent of Landlord. Tenant shall also be responsible
for any damage to the parking lot caused by front-end loaders or other vehicles
and equipment utilized in connection with Tenant's use of the Premises. If
Tenant fails to make the repairs or replacements promptly as required herein,
Landlord may, at its option, make the repairs and replacements and the
reasonable cost of such repairs and replacements shall be charged to Tenant as
additional rent and shall become due and payable by Tenant within ten (10) days
from receipt of Landlord's invoice. Costs incurred under this paragraph are the
total responsibility of Tenant and do not constitute common expenses under
Paragraph 4.


     17.  Alterations.  Tenant shall not make any alterations, additions or
          -----------                                                      
improvements to the Premises without the prior written consent of Landlord.
Tenant may, without the consent of Landlord, but at its own cost and expense and
in a good and workmanlike manner, make such minor alterations, additions or
improvements, or erect, remove or alter such partitions, or erect such shelves,
bins, machinery and trade fixtures as Tenant may deem advisable without altering
the basic character of the building or improvements and without overloading or
damaging such building or improvements; and, in each case, complying with all
applicable governmental laws, ordinances, regulations, and other requirements.
At the termination of this Lease, Tenant shall, if Landlord so elects, remove
all alterations, additions, improvements and partitions erected by Tenant and
restore the Premises to their original condition; otherwise, such improvements
shall be delivered up to the Landlord with the Premises. All shelves, bins,
machinery and trade fixtures installed by Tenant may be removed by Tenant at the
termination of this Lease if Tenant so elects, and shall be removed if required
by Landlord. All such removals and restoration shall be accomplished in a good
workmanlike manner so as not to damage the primary structure or structural
qualities of the buildings and other improvements situated on the Premises. All
roof penetrations and roof alterations of any kind which are approved by
Landlord, shall be performed by the Landlord's roofing contractor at Tenant's
sole cost and expense.

          Prior to making any alterations or repairs to the Premises which will
involve the alteration or removal of plumbing, electrical wiring, air
conditioning, heating or ventilation systems, or the fire sprinkler system,
Tenant shall furnish Landlord with a set of the plans and specifications for the
alterations or repairs and shall not commence any such work without Landlord's
express written approval.


     18.  Services by the Landlord.  Landlord shall furnish the Tenant, while 
          ------------------------                                     
occupying the Premises, cold water at those points of supply provided for the
general use of the tenants in the building, exterior security lights (as
determined necessary by Landlord) and exterior janitorial service for the
building so that the parking lot, sidewalks, exterior sides of exterior glass,
and landscaping of the Project are maintained in a clean, neat and orderly
fashion. Tenant shall be responsible for all interior janitorial services and
for placing trash in the exterior dumpsters or other trash receptacles serving
the Project in accordance with reasonable rules and regulations promulgated from
time to time by Landlord.

          Landlord, at Landlord's option, may provide general area security or
guard services from time to time for the Project, in which event, the cost of
such service attributable to the Project shall be considered a Common Expense.
Tenant, at its sole cost and expense, shall provide whatever security or alarm
services or systems which Tenant deems necessary and/or appropriate for the
protection of the Premises and contents thereof. In no event shall the Landlord
be responsible for loss or damage to any of the Tenant's property, including all
furniture, fixtures, equipment and inventory, even if Landlord has provided
security service. Tenant may, with Landlord's prior written approval, re-key the
Premises' locks as deemed necessary by Tenant from time to time, provided Tenant
uses the locksmith specified by Landlord and complies with all of Landlord's
Rules and Regulations concerning keys and locks.


     19.  Common Areas.  All parking areas, sidewalks, driveways, landscaped 
          ------------                                                       
areas (inclusive of sprinkler systems), and other common areas located on the
real property on which the Project is located, and such other areas and
facilities that the Landlord shall from time to time designate as being for the
mutual use of itself and the Tenant, their customers and employees, shall be 
known as the "Common Areas." Tenant, its employees, customers and invitees shall
have the nonexclusive right to use the Common Areas, together with the Landlord 
and the other Tenants of the building, their customers, employees and guests, 
and subject to such rules and regulations governing the use of the Common Areas 
as the Landlord may from time to time prescribe, such rules specifically 
including, but not limited to, parking rules. The Tenant shall not solicit any 
business within the Common Areas or use the Common Areas for storage without the
prior written consent of the Landlord or take any action which would interfere 
with the rights of other persons to use the Common Areas. Landlord may 
temporarily close any part of the Common Areas for such period of time as is 
necessary to make repairs or alterations to the Common Areas or the improvements
located in the Project of which the Premises are a part.

                                       6

 
          Tenant shall, at all times during the Term of this Lease, have in
common with the Landlord and all other tenants and guests of the Project, the
nonexclusive use of the parking areas located within the Project; provided,
however, the Landlord shall have the right to designate portions of the parking
areas as reserved for covered parking for specific tenants of the Project.
Landlord may make, modify and enforce rules and regulations relating to the
parking of automobiles, trucks, trailers and other vehicles on the Project, and
the entrances, exits and traffic lanes of parking areas. The Tenant, its
employees, customers and guests, will abide by such rules and regulations.


     20.  Fire & Casualty Damage.
          ---------------------- 

          (a)  Substantial Destruction - If the Leased Premises should be 
               -----------------------                               
     totally destroyed by fire or other casualty, or if the Premises, as
     determined by Landlord, should be damaged so that rebuilding cannot
     reasonably be completed within one hundred twenty (120) working days after
     the date of written notification by Tenant to Landlord of the destruction,
     this Lease shall terminate and the Rent shall be abated for the unexpired
     portion of the Lease, effective as of the date of the written notification.

          (b)  Partial Destruction - If the Premises should be partially damaged
               -------------------                                       
     by fire or other casualty, and rebuilding or repairs can reasonably be
     completed within one hundred twenty (120) working days from the date of
     written notification by Tenant to Landlord of the destruction, this Lease
     shall not terminate, and Landlord shall at its sole risk and expense
     proceed with reasonable diligence to rebuild or repair the building or
     other improvements to substantially the same condition in which they
     existed prior to the damage. If the Premises to be rebuilt or repaired are
     untenantable in whole or in part following the damage, and the damage or
     destruction was not caused or contributed to by act or negligence of
     Tenant, its agents, employees, invitees or those for whom Tenant is
     responsible, the Rent payable under this Lease during the period for which
     the Premises are untenantable shall be adjusted to such an extent as may be
     fair and reasonable under the circumstances.

     In the event that Landlord fails to complete the necessary repairs or
     rebuilding within one hundred twenty (120) working days from the date of
     written notification by Tenant to Landlord of the destruction, Tenant may
     at its option terminate this Lease by delivering written notice of
     termination to Landlord, whereupon all rights and obligations under this
     Lease shall cease to exist. Notwithstanding anything herein to the
     contrary, in the event the holder of any indebtedness secured by a mortgage
     or deed of trust covering the Project of which the Premises are a part
     requires that the insurance proceeds be applied to such indebtedness, then
     Landlord shall have the right to terminate this Lease by delivering written
     notice of termination to Tenant whereupon all rights and obligations
     hereunder shall cease and terminate.


     21.  Insurance.
          --------- 

          (a)  Landlord shall at all times during the term of this Lease
     maintain a policy or policies of insurance with the premiums paid in
     advance, issued by and binding upon some solvent insurance company,
     insuring the building against all risk of direct physical loss in an amount
     equal to at least eighty percent of the full replacement cost of the
     building structure and its improvements as of the date of the loss;
     provided, Landlord shall not be obligated in any way or manner to insure
     any personal property (including, but not limited to, any furniture,
     machinery, goods or supplies) of Tenant upon or within the Leased Premises,
     any fixtures installed or paid for by Tenant upon or within the Premises
     or any improvements which Tenant may construct on the Premises. Tenant
     shall have no right in or claim to the proceeds of any policy of insurance
     maintained by Landlord even if the cost of such insurance is home by Tenant
     as set forth in Paragraph 4 (e).

          (b)  The maximum amount of insurance premiums for fire and extended
     coverage insurance in the Project during any one calendar year which is to
     be paid by the Landlord shall be a total of the actual calendar year 1994
     insurance expense for the Project. If, in any one calendar year during the
     term or any renewal hereof, the fire and extended coverage insurance
     premiums assessed against the building and improvements of which the
     Premises are a part exceed such specified sum, Tenant shall pay to the
     Landlord upon demand the amount of such excess. In the event the Premises
     constitute a portion of a multiple occupancy building, Tenant agrees to pay
     the Landlord upon demand the amount of Tenant's proportionate share of such
     excess as calculated by Landlord.

          (c)  Tenant at all times during the Lease term shall, at its own 
     expense, keep in full force and effect comprehensive general liability
     insurance with "personal injury" coverage and contractual liability
     coverage, with minimum limits of $1,000,000.00 on account of bodily
     injuries to, or death of, one or more than one person as the result of any
     one accident or occurrence and $500,000.00 on account of damage to
     property. Tenant shall also carry insurance against fire and such other
     risks as are from time to time included in Standard All-Risk Insurance
     (including coverage against vandalism and malicious mischief) for the full
     insurable value of Tenant's merchandise, trade fixtures, furnishings, wall
     covering, carpeting, drapes, equipment and all items of personal property
     of Tenant located on or in the Leased Premises. Landlord shall be a named
     additional insured on said policy. All insurance policies or duly executed
     certificates for the same required to be carried by Tenant under this
     Lease, together with satisfactory

                                       7

 
     evidence of the payment of the premium thereof, shall be deposited with
     Landlord on the date Tenant first occupies the Leased Premises and upon
     renewals of such policies not less than fifteen (15) days prior to the
     expiration of the term of such coverage. All insurance required to be
     carried by Tenant under this Lease shall be in form and content, and
     written by insurers acceptable to Landlord, in its sole discretion. If
     Tenant shall fail to comply with any of the requirements contained relating
     to insurance, Landlord may obtain such insurance and Tenant shall pay to
     Landlord, on demand as additional rent hereunder, the premium cost thereof.

          (d)  Tenant, at its sole cost and expense, shall insure all tenant
     improvements excluding improvements done by Landlord prior to occupancy and
     outlined in EXHIBITS "B" and "C" and property located on the Premises.
     Landlord shall in no way be responsible to insure or restore any of
     Tenant's personal property or improvements; and Tenant hereby releases and
     discharges Landlord from any and all such claims and demands.

          (e)  All policies of insurance shall be written by insurance company
     or companies qualified to do business in the State of Texas which are
     acceptable to the Landlord, and all such policies shall contain
     endorsements providing for ten (10) days' notice of termination or
     cancellation to the Landlord, and its mortgagee, if any.

          (f)  Fifteen (15) days prior to the expiration of any policy of
     insurance required to be provided by Tenant under the terms of this Lease,
     the Tenant shall deliver to Landlord a Certificate of Insurance evidencing
     the renewal of each such policy of insurance. Any certificate of insurance
     required hereunder shall provide that at least ten (10) days' written
     notice of any change in or cancellation of the insurance shall be given by
     the insurance company to the Landlord and Landlord's mortgagee, if any. The
     Tenant shall promptly pay the premiums for any renewal of insurance.

          (g)  In compliance with the insurance company requirements, Tenant
     shall not violate or permit to be violated any of the conditions or
     provisions of any such policy or policies of insurance, and Tenant shall
     perform and satisfy the requirements of the company writing such policies.

          (h)  Upon the failure at any time of the Tenant to obtain and deliver
     to the Landlord or the Landlord's mortgagee, any certificate of insurance
     or duplicate policy of insurance required by this Lease, together with the
     appropriate receipts indicating that the policy's premiums have been paid
     at least fifteen (15) days before the expiration of the insurance policies,
     if any, or to pay the premiums therefor, the Landlord shall be at liberty
     from time to time, and as often as such failure should occur, to procure
     such insurance and to pay the premiums therefor as are commercially
     reasonable, and, any and all sums paid for insurance by the Landlord shall
     be and become and are hereby declared to be additional rental under the
     terms of the Lease, which sum shall be immediately due and payable to
     Landlord.



     22.  Waiver of Subrogation.  Anything in this Lease to the contrary
          ---------------------                                         
notwithstanding, Landlord and Tenant hereby waive and release each other of and
from any and all right of recovery, claim, action or cause of action, against
each other, their agents, officers and employees, for any loss or damage that
may occur to the Premises, improvements to the building of which the Premises
are a part, or personal property within the building, by reason of fire or the
elements, regardless of cause or origin, including negligence of Landlord or
Tenant and their agents, officers and employees. Landlord and Tenant agree
immediately to give their respective insurance companies which have issued
policies of insurance covering all risk of direct physical loss, written notice
of the terms of the mutual waivers contained in this section, and to have the
insurance policies properly endorsed, if necessary, to prevent the invalidation
of the insurance coverages by reason of the mutual waivers.


     23.  Hold Harmless.  Landlord shall not be liable to Tenant or Tenant's
          -------------   
employees, agents, patrons or visitors, or to any other person whomsoever for
any injury to person or damage to property on or about the Premises, caused by
the negligence or misconduct of Tenant, its agents, servants or employees, or of
any other person entering upon the Premises under express or implied invitation
of Tenant, or caused by the buildings and improvements located on the Project
becoming out of repair, or caused by leakage of gas, oil, water or steam or by
electricity emanating from the Premises, drain or sewer stoppages or backups, or
due to any cause whatsoever; and, Tenant agrees to indemnify Landlord and hold
it harmless from any loss, expense or claims, including attorneys' fees,
arising out of any such damage or injury, except that any injury to person or
damage to property caused by the negligence of Landlord or by the failure of 
Landlord to repair and maintain that part of the Premises which Landlord is 
obligated to repair and maintain, if any, after the receipt of written notice 
from Tenant of needed repairs or of defects shall be the liability of Landlord 
and not of Tenant; and, Landlord agrees to indemnify Tenant and hold it harmless
from any and all loss, expenses or claims, including attorneys' fees, arising 
out of such damage or injury. Tenant shall procure and maintain throughout the 
Term of this Lease a policy or policies of insurance, at its sole cost and
expense, insuring both Landlord and Tenant against all claims, demands or
actions arising out of or in connection with Tenant's use or occupancy of the
Premises, or by the condition of the Premises, the limits of such policy or
policies to be consistent with the limits of the liability policies described in
Paragraph 21 of this Lease.

                                       8

 
     24.  Assignment and Subletting.  Tenant shall not have the right to 
          -------------------------
assign this Lease or to sublet the whole or any part of the Premises without the
prior written consent of Landlord. Notwithstanding any permitted assignment or
subletting, Tenant shall at all times remain fully responsible and liable for
the payment of the Rent herein specified and for compliance with all of its
other obligations under the terms, provisions and covenants of this Lease. Upon
the occurrence of an "event of default," as hereinafter defined, if the
Premises or any part thereof are then assigned or sublet, Landlord, in addition
to any other remedies herein provided or provided by law, may, at its option,
collect directly from such assignee or subtenant all rents becoming due to
Tenant under such assignment or sublease and apply any such Rent against any
sums due to it by Tenant hereunder; and, no such collection shall be construed
to constitute a novation or a release of Tenant from the further performance of
its obligations hereunder. Landlord shall have the right to assign any of its
rights under this Lease.



     25.  Condemnation.
          ------------ 

          (a)  Substantial Taking - If all or a substantial part of the 
               ------------------  
     Premises are taken for any public or quasi-public use under any
     governmental law, ordinance or regulation, or by right of eminent domain or
     by purchase in lieu thereof, and the taking would prevent or materially
     interfere with the use of the Premises for the purpose for which it is then
     being used, this Lease shall terminate and the Rent shall be abated during
     the unexpired portion of this Lease effective on the date physical
     possession is taken by the condemning authority. Tenant shall have no claim
     to the condemnation award or proceeds in lieu thereof.

          (b)  Partial Taking - If a portion of the Premises shall be taken for 
               --------------                                               
     any public or quasi-public use under any governmental law, ordinance or
     regulation, or by right of eminent domain or by purchase in lieu thereof,
     and this Lease is not terminated as provided in Section 24.(a) above, or if
     necessary access to parking for the Premises is materially affected by such
     action, Tenant shall have the right to terminate this Lease and the Rent
     and other obligations for the unexpired portions of this Lease shall be
     abated. If Tenant does not terminate this Lease, Landlord shall at
     Landlord's sole risk and expense, promptly restore and reconstruct the
     building and other improvements in the Premises to the extent necessary to
     make it reasonably tenantable. The Rent payable under this Lease during the
     unexpired portion of the term shall be adjusted to such an extent as may be
     fair and reasonable under the circumstances. Tenant shall have no claim to
     the condemnation award or proceeds in lieu thereof.


     26.  Default and Remedies.
          -------------------- 

          (a)  Default by Tenant - The following shall be deemed to be events of
               -----------------                                                
     default by Tenant under this Lease:

          (1) Tenant shall fail to pay when due any installment of Rent or any
          other payment required pursuant to this Lease; and the failure is not
          cured within five (5) days after written notice to Tenant;

          (2) Tenant shall abandon, desert, vacate, or cease operation in any
          substantial portion of the Premises and discontinue paying rental;

          (3) Tenant shall fail to comply with any term, provision or covenant
          of this Lease, other than the payment of Rent, and the failure is not
          cured within ten (10) days after written notice to Tenant:

          (4) Tenant shall file a petition or be adjudged bankrupt or insolvent
          under any applicable federal or state bankruptcy or insolvency law or
          admit that it cannot meet its financial obligations as they become
          due; or a receiver or trustee shall be appointed for all or
          substantially all of the assets of Tenant; or Tenant shall make a
          transfer in fraud of creditors or shall make an assignment for the
          benefit of creditors; or

          (5) Tenant shall do or permit to be done any act which results in a
          lien being filed against the Premises or the building and/or project
          of which the Premises are a part.

          (b)  Remedies for Tenant's Default - Upon the occurrence of any event
               -----------------------------                                   
     of default set forth in this Lease, Landlord shall have the option to
     pursue any one or more of the remedies set forth herein without any notice 
     or demand.

          (1) Landlord may enter upon and take possession of the Premises, by
          picking or changing locks if necessary, and lock out, expel or remove
          Tenant and any other person who may be occupying all or any part of
          the Premises without being liable for any claim for damages, and relet
          the Premises on behalf of Tenant and receive the rent directly by
          reason of the reletting. Tenant agrees to pay landlord on demand any
          deficiency that may arise by reason of any reletting of the Premises:
          further, Tenant agrees to reimburse Landlord for any reasonable
          expenditures made by it in order to relet the Premises, including, but
          not limited to, remodeling and repair costs.

                                       9

 
          (2) Landlord may enter upon the Premises, by picking or changing locks
          if necessary, without being liable for any claim for damages, and do
          whatever Tenant is obligated to do under the terms of this Lease.
          Tenant agrees to reimburse Landlord on demand for any expenses which
          Landlord may incur in effecting compliance with Tenant's obligations
          under this Lease; further, Tenant agrees that Landlord shall not be
          liable for any damages resulting to Tenant from effecting compliance
          with Tenant's obligations under this Lease unless caused by the
          negligence of Landlord or otherwise.

          (3) Landlord may terminate this Lease, in which event Tenant shall
          immediately surrender the Premises to Landlord, and if Tenant fails to
          surrender the Premises, Landlord may, without prejudice to any other
          remedy which it may have for possession or arrearages in rent, enter
          upon and take possession of the Premises, by picking or changing locks
          if necessary, and lock out, expel or remove Tenant and any other
          person who may be occupying all or any part of the Premises without
          being liable for any claim for damages. Tenant agrees to pay on demand
          the amount of all loss and damage which Landlord may suffer by reason
          of the termination of this Lease under this section, whether through
          inability to relet the Premises on satisfactory terms or otherwise.
          Notwithstanding any other remedy set forth in this Lease, in the event
          Landlord has made rent concessions of any type or character, or waived
          any Rent, and Tenant fails to take possession of the Premises on the
          commencement or completion date or otherwise defaults at any time
          during the term of this Lease, the rent concessions, including any
          waived Rent, shall be canceled and the amount of the Rent or other
          rent concessions shall be due and payable immediately as if no rent
          concessions or waiver of any Rent had ever been granted. A rent
          concession or waiver of the Rent shall not relieve Tenant of any
          obligation to pay any other charge due and payable under this Lease
          including without limitation any sum due under Section 3.
          Notwithstanding anything contained in this Lease to the contrary, this
          Lease may be terminated by Landlord only by mailing or delivering
          written notice of such termination to Tenant, and no other act or
          omission of Landlord shall be construed as a termination of this
          Lease.

          (c)  Repetitive Default - Should Tenant be in default for the same 
               ------------------                                            
     cause three (3) or more times during the Term of this Lease, regardless of
     whether Tenant has cured previous defaults, Landlord may elect at its
     option to declare the term hereof ended, re-enter the Premises and take
     possession thereof, and remove all persons therefrom, and Tenant shall have
     no further claim therein or hereunder.

          (d)  Fees and Costs - If on account of any breach or default by 
               --------------                                   
     Tenant in Tenant's obligations hereunder, it shall become necessary for
     Landlord to employ (or contract with) an attorney or other professional to
     enforce or defend any of Landlord's rights or remedies hereunder, Tenant
     agrees to pay any reasonable fees and costs incurred by Landlord in such
     connection.

          (e)  Remedies Cumulative - No reference to any specific right or 
               -------------------
     remedy in this Lease shall preclude Landlord from exercising any other
     right or from having any other remedy or from maintaining any action or
     proceeding to which it may otherwise be entitled at law or in equity (or
     both). Landlord's failure to insist upon a strict performance of any
     covenant of this Lease or to exercise any option or right herein contained
     shall not be a waiver or relinquishment for the future of such covenant,
     right or option, or the continuance of the failure of Tenant, but the same
     shall remain in full force and effect.

          (f)  Remedies of Tenant - In the event of any default by Landlord, 
               ------------------
     Tenant's exclusive remedy shall be an action for damages (Tenant hereby
     waiving the benefit of any laws granting Tenant a lien upon the property of
     Landlord and/or upon rental due Landlord), but prior to any such action
     Tenant shall give Landlord written notice specifying such default with
     particularity, and Landlord shall thereupon have thirty (30) days plus such
     additional reasonable period as may be required in the exercise by Landlord
     of due diligence in which to cure any such default. Unless and until
     Landlord fails thereof. All obligations of Landlord hereunder shall be
     construed as covenants, not conditions; and all such obligations shall be
     binding upon Landlord only during the period of Landlord's possession of
     the Shopping Center and not thereafter.

     27.  Liens.
          ----- 

          (a)  Landlord's Lien - As security for payment of Rent, damage and all
               ---------------                                       
     other payments required to be made by this Lease, Tenant hereby grants to
     Landlord a lien upon all property of Tenant now or subsequently located
     upon the Premises. Notwithstanding, Landlord hereby agrees to subordinate
     any statutory or contractual landlord's lien to any security interest in
     Tenant's property, now existing or hereafter granted by Tenant. In this
     regard, Landlord agrees to execute any and all documents which may
     reasonably be necessary to accomplish such subordination. If Tenant
     abandons or vacates any substantial portion of the Premises or is in
     default in the payment of any rentals, damages or other payments required
     to be made by this Lease or is in default of any other provision of this
     Lease. Landlord may enter upon the Premises, by picking or changing locks
     if necessary, and take possession of all or any part of the personal
     property, and may sell all or any part of the personal property at a public
     or private sale, in one or successive sales, with or without notice, to the
     highest bidder for cash, and, on behalf of Tenant, sell and convey all or
     part of the personal property to the highest bidder, delivering to the
     hightest bidder all of Tenant's title and interest in the personal property
     sold. The proceeds of the sale of the personal

                                       10

 
     attorney's fees, and then toward the payment of all sums then due by Tenant
     to Landlord under the terms of this Lease. Any excess remaining shall be
     paid to Tenant or any other person entitled thereto by law.

          (b)  Mortgages - Tenant accepts this Lease subject and subordinate 
               ---------                                                      
     to any recorded mortgage or deed of trust lien presently existing or
     hereafter created upon the building or Project and to all existing recorded
     restrictions, covenants, easements and agreements with respect to the
     building or Project. Landlord is hereby irrevocably vested with full power
     and authority to subordinate Tenant's interest under this Lease to any
     first mortgage or deed of trust lien hereafter placed on the Premises, and
     Tenant agrees upon demand to execute additional instruments subordinating
     this Lease as Landlord may require. If the interests of Landlord under this
     Lease shall be transferred by reason of foreclosure or other proceedings
     for enforcement of any first mortgage or deed of trust on the Premises,
     Tenant shall be bound to the transferee (sometimes called the "Purchaser")
     at the option of the Purchaser, under the terms, covenants and conditions
     of this Lease for the balance of the term remaining, including any
     extensions or renewals, with the same force and effect as if the Purchaser
     were Landlord under this Lease, and, if requested by the Purchaser, Tenant
     agrees to attorn to the Purchaser, including the first mortgagee under any
     such mortgage if it be the Purchaser, as its Landlord.

          (c)  Mechanic's liens - Tenant shall have no authority, express or 
               ----------------                                              
     implied, to create or place any lien or encumbrance of any kind or nature
     whatsoever upon, or in any manner to bind the interest of Landlord in the
     Premises or to charge the rentals payable hereunder for any claim in favor
     of any person dealing with Tenant, including those who may furnish
     materials or perform labor for any construction or repairs, and each such
     claim shall affect and each such lien shall attach to, if at all, only the
     leasehold interest granted to Tenant by this instrument. Tenant covenants
     and agrees that it will pay or cause to be paid all sums legally due and
     payable by it on account of any labor performed or materials furnished in
     connection with any work performed on the Premises on which any lien is or
     can be validly and legally asserted against its leasehold interest in the
     Premises or the improvements thereon, and that it will save and hold
     Landlord harmless from any and all loss, cost or expense based on or
     arising out of asserted claims or liens against the leasehold estate or
     against the rights, title and interest of the Landlord in the Premises or
     under the terms of this Lease.

               Nothing contained in this Lease shall constitute the consent or
     the request of the Landlord, expressed or implied, for the performance of
     any labor or the furnishing of any materials or other property in respect
     to the Leased Premises, or any part thereof, nor is the Tenant given any
     authority to contract for or commit the renting of any services or the
     furnishing of any materials or other properties so as to permit the making
     of any claims against the Landlord.

          (d)  Estoppel Certificates - Tenant agrees to furnish, from time to 
               --------------------- 
     time, within ten (10) days after receipt of a request from Landlord or
     Landlord's mortgagee, a statement certifying, if applicable and to the
     extent true, the following: Tenant is in possession of the Premises; the
     Premises are acceptable; the Lease is in full force and effect; the Lease
     is unmodified; Tenant claims no present charge, lien, or claim of offset
     against rent; the rent is paid for the current month, but is not prepaid
     for more than one month and will not be prepaid for more than one month in
     advance; there is no existing default by reason of some act or omission by
     Landlord; and such other matters as may be reasonably required by Landlord
     or Landlord's mortgagee. Tenant's failure to deliver such statement, in
     addition to being a default under this Lease, shall be deemed to establish
     conclusively that this Lease is in full force and effect except as declared
     by Landlord, that Landlord is not in default of any of its obligations
     under this Lease, and that Landlord has not received more than one month's
     rent in advance.


     28.  Laws and Governmental Regulations.  Tenant agrees to comply promptly 
          ---------------------------------                          
with all laws, rules and orders of the federal, state and municipal governments
and all other departments applicable to the Premises and to comply promptly with
the requirements of the Board of Fire Underwriters. This lease shall be governed
by the laws of the State of Texas.


     29.  Hazardous or Toxic Materials.
          ---------------------------- 

          (a)  Hazardous Substances.
               -------------------- 

          (1) Presence and Use of Hazardous Substances.  Tenant shall not,
              ----------------------------------------                    
          without Landlord's prior written consent, keep on or around the
          Premises, Common Areas or Building, for use, disposal, treatment,
          generation, storage or sale, any substances designated as, or
          containing components designated as hazardous, dangerous, toxic or
          harmful (collectively referred to as "Hazardous Substances"), and/or
          subject to regulation, statute or ordinance. With respect to any such
          Hazardous Substance, Tenant shall:

               (i)    Comply promptly, timely, and completely with all
          governmental requirements for reporting, keeping, and submitting
          manifests, and obtaining and keeping current identification numbers;

                                      11

 
               (ii)   Submit to Landlord true and correct copies of all reports,
          manifests, and identification numbers at the same time as they are
          required to be and/or are submitted to the appropriate governmental
          authorities;

               (iii)  Within five (5) days of Landlord's request, submit written
          reports to Landlord regarding Tenant's use, storage, treatment,
          transportation, generation, disposal of sale of Hazardous Substances
          and provide evidence satisfactory to Landlord of Tenant's compliance
          with the applicable government regulations;

               (iv)   Allow Landlord or Landlord's agent or representative to
          come on the premises at all times to check Tenant's compliance with
          all applicable governmental regulations regarding Hazardous
          Substances;

               (v)    Comply with minimum levels, standards or other performance
          standards or requirements which may be set forth or established for
          certain Hazardous Substances (if minimum standards or levels are
          applicable to Hazardous Substances present on the Premises, such
          levels or standards shall be established by an on-site inspection by
          the appropriate governmental authorities and shall be set forth in an
          addendum to this Lease); and

               (vi)   Comply with all applicable governmental rules, regulations
          and requirements regarding the proper and lawful use, sale,
          transportation, generation, treatment, and disposal of Hazardous
          Substances.

          (2) Any and all costs incurred by Landlord and associated with
          Landlord's inspection of Tenant's Premises and Landlord's monitoring
          of Tenant's compliance with this Paragraph 29, including Landlord's
          attorneys' fees and costs, shall be Additional Rent and shall be due
          and payable to Landlord immediately upon demand by Landlord.

          (b)  Cleanup Costs, Default and Indemnification.
               ------------------------------------------ 

          (1) Tenant shall be fully and completely liable to Landlord for any
          and all cleanup costs, and any and all other charges, fees, penalties
          (civil and criminal) imposed by any governmental authority with
          respect to Tenant's use, disposal, transportation, generation and/or
          sale of Hazardous Substances, in or about the Premises, Common Areas,
          or Building.

          (2) Tenant shall indemnify, defend and save Landlord harmless from any
          and all of the costs, fees, penalties and charges assessed against or
          imposed upon Landlord (as well as Landlord's attorneys' fees and
          costs) as a result of Tenant's use, disposal, transportation,
          generation and/or sale of Hazardous Substances.

          (3) Upon Tenant's default under this Paragraph 29, in addition to the
          rights and remedies set forth elsewhere in this Lease, Landlord shall
          be entitled to the following rights and remedies:

               (i)  At Landlord's option, to terminate this Lease immediately;
          and/or

               (ii) To recover any and all damages associated with the default,
          including, but not limited to cleanup costs and charges, civil and
          criminal penalties and fees, loss of business and sales by Landlord
          and other tenants of the Building, any and damages and claims asserted
          by third parties and Landlord's attorneys' fees and costs.

          (c)  Indemnification.  Notwithstanding Paragraph 29.(b) above, in the
               ---------------                                                 
     event of concurrent negligence of Tenant, its agents, employees,
     sublessees, invitees, licensees or contractors on the one hand, and that of
     Landlord, its partners, directors, officers, agents, employees, or
     contractors on the other hand, which concurrent negligence results in
     injury or damage to persons or property and relates to the construction,
     alteration, repair, addition to, subtraction from, improvement to or
     maintenance of the Premises, Common Areas or Building, Tenant's obligation
     to indemnify Landlord as set forth in this Paragraph 30 shall be limited to
     the extent of Tenant's negligence, and that of its agents, employees,
     sublessees, invitees, licensees or contractors, including Tenant's
     proportional share of costs, attorneys' fees and expenses incurred in
     connection with any claim, action or proceeding brought with respect to
     such injury or damage. Tenant hereby agrees to waive its immunity under
     industrial insurance. Landlord shall indemnify Tenant for any and all costs
     or claims relating to any pre-exiting hazardous substances or contamination
     of Premises of Hazardous Substances which is not caused by Tenant. Such
     costs shall not be considered Common Expenses as described in Paragraph 4
     of this Lease Agreement.


     30.  Notices.  Each provision of this instrument or of any applicable 
          -------
governmental laws, ordinances, regulations and other requirements with 
reference to the sending, mailing or delivery of any notice or the making of any
payment by Landlord to Tenant, or with reference to the sending, mailing or 
delivery of any notice or the making of any payment by Tenant to Landlord, shall
be deemed to be complied with, when and if the following steps are taken:

                                      12

 
          (a)  All Rent and other payments required to be made by Tenant to
     Landlord hereunder shall be payable to Landlord at the address hereinbelow
     set forth or at such other address as Landlord may specify from time to
     time by written notice, delivered in accordance herewith.

          (b)  All payments required to be made by Landlord to Tenant hereunder
     shall be payable to Tenant at the address hereinbelow set forth, or at such
     other address within the continental United States as Tenant may specify
     from time to time by written notice, delivered in accordance herewith.

          (c)  Any notice or document required or permitted to be delivered
     hereunder shall be deemed to be delivered whether actually received or not,
     when deposited in the United States Mail, postage prepaid, Certified or
     Registered Mail, addressed to the parties hereto at the respective
     addresses set forth below, or at such other address as they have
     theretofore specified by written notice, delivered in accordance herewith:
     If and when included within the Term "Landlord," as used in this
     instrument, there are more than one person, firm or corporation, all shall
     jointly arrange among themselves for their joint execution of such a notice
     specifying some individual at some specific address for the receipt of
     notices and payments to Landlord; if, and when included within the Term
     "Tenant," as used in this instrument, there are more than one person, firm
     or corporation, all shall jointly arrange among themselves for their joint
     execution of such a notice specifying some individual at some specific
     address within the continental United States for the receipt of notices and
     payments to Tenant. All parties included within the terms "Landlord" and
     "Tenant," respectively, shall be bound by notices in accordance with the
     provisions of this Section to the same effect as if each had received such
     notice. If requested in writing by Landlord's mortgagee, Tenant agrees to
     furnish the mortgagee with copies of all notices to Landlord.

     Landlord:                               with a copy to:

     UBP Partners Limited
     c/o Fulcrum Property Group, Inc.
     9100 IH 10 West, Suite 330
     San Antonio, Texas 78230

     Tenant:                                 with a copy to:

     /s/ Art Smith
     President
     7710 Crooked Brook-
     San Antonio, 7X 78250
 
     31.  Miscellaneous.
          ------------- 

          (a)  Waiver - Failure of Landlord to declare an event of default
               ------
     immediately upon its occurrence, or delay in taking any action in
     connection with an event of default, shall not constitute a waiver of the
     default; but Landlord shall have the right to declare the default at any
     time and take such action as is lawful or authorized under this Lease
     pursuant to any one or more of the remedies set forth in Paragraph 26.(b)
     above.

               Pursuit of any one or more of the remedies set forth in Paragraph
     26.(b) above shall not preclude pursuit of any one or more of the other
     remedies provided elsewhere in this Lease or provided by law, nor shall
     pursuit of any remedy constitute forfeiture or waiver of any rent or
     damages accruing to Landlord by reason of the violation of any of the
     terms, provisions or covenants of this Lease. Failure by Landlord to
     enforce one or more of the remedies provided upon an event of default shall
     not be deemed or construed to constitute a waiver of the default or of any
     other violation or breach of any of the terms, provisions and covenants
     contained in this Lease.

          (b)  Act of God - Landlord shall not be required to perform any
               ----------
     covenant or obligation in this Lease, or be liable in damages to Tenant, so
     long as the performance or non-performance of the covenant or obligation is
     delayed, caused or prevented by an act of God, force majeure or by Tenant.

          (c)  Attorney's Fees - In the event Tenant defaults in the performance
               ---------------
     of any of the terms, covenants, agreements or conditions contained in this
     Lease and Landlord places in the hands of an attorney the enforcement of
     all or any part of this Lease, the collection of any rent due or to become
     due or recovery of the possession of the leased premises, Tenant agrees to
     pay Landlord's costs of collection, including reasonable attorney's fees
     for the services of the attorney, whether suit is actually filed or not.

          (d)  Successors - This Lease shall be binding upon and inure to the
               ----------
     benefit of Landlord and Tenant and their respective heirs, personal
     representatives, successors and assigns. It is hereby covenanted and agreed
     that should Landlord's interest in the Leased Premises cease to exist for
     any reason during the term of this Lease, then notwithstanding the
     happening of such event, this Lease nevertheless shall remain unimpaired
     and in full force and effect, and Tenant hereunder agrees to attorn to the
     then owner of the Leased Premises.

                                       13

 
          (e)  Captions - The captions appearing in this Lease are inserted 
               ---------                                                    
     only as a matter of convenience and in no way define, limit, construe or
     describe the Scope or intent of any section.

          (f)  Submission of Lease - Submission of this Lease to Tenant for 
               -------------------                                          
     signature does not constitute a reservation of space or an option to lease.
     This Lease is not effective until execution by and delivery to both
     Landlord and Tenant.

          (g)  Corporate Authority - If Tenant executes this Lease as a 
               -------------------                                      
     corporation, each of the persons executing this Lease on behalf of Tenant
     does hereby personally represent and warrant that Tenant is a duly
     authorized and existing corporation, that Tenant is qualified to do
     business in the state of Texas, that the corporation has full right and
     authority to enter into this Lease, and that each person signing on behalf
     of the corporation is authorized to do so. In the event any representation
     or warranty by the Tenant is false, all persons who execute this Lease on
     behalf of Tenant shall be liable, individually, as Tenant.

          (h)  Severability - If any provision of this Lease or the application
               ------------                                                    
     thereof to any person or circumstance shall be invalid or unenforceable to
     any extent, the remainder of this Lease and the application of such
     provisions to other persons or circumstances shall not be affected thereby
     and shall be enforced to the greatest extent permitted by law.

          (i)  Landlord's Liability - If Landlord shall be in default under this
               --------------------                                             
     Lease and, if as a consequence of such default, Tenant shall recover a
     money judgement against Landlord, such judgement shall be satisfied only
     out of the right, title and interest of Landlord in the Project as the same
     may then be encumbered and neither Landlord nor any person or entity
     comprising Landlord shall be liable for any deficiency. In no event shall
     Tenant have the right to levy execution against any property of Landlord
     nor any person or entity comprising Landlord other than its interest in the
     Project as herein expressly provided.

          (j)  Indemnity - Landlord agrees to indemnify and hold harmless Tenant
               ---------                                                        
     from and against any liability or claim, whether meritorious or not,
     arising with respect to any broker whose claim arises by, through or on
     behalf of Landlord. Tenant agrees to indemnify and hold harmless Landlord
     from and against any liability or claim, whether meritorious or not,
     arising with respect to any broker whose claim arises by, through or on
     behalf of Tenant.


     32.  Amendment and Limitation of Warranties.
          -------------------------------------- 

          (a)  Entire Agreement - IT IS EXPRESSLY AGREED BY TENANT, AS A 
               ----------------                                          
     MATERIAL CONSIDERATION FOR THE EXECUTION OF THIS LEASE, THAT THIS LEASE,
     WITH THE SPECIFIC REFERENCES TO WRITTEN EXTRINSIC DOCUMENTS, IS THE ENTIRE
     AGREEMENT OF THE PARTIES; THAT THERE ARE, AND WERE, NO VERBAL
     REPRESENTATIONS, WARRANTIES, UNDERSTANDINGS, STIPULATIONS, AGREEMENTS OR
     PROMISES PERTAINING TO THIS LEASE OR TO THE EXPRESSLY MENTIONED WRITTEN
     EXTRINSIC DOCUMENTS NOT INCORPORATED IN WRITING IN THIS LEASE.

          (b)  Amendment - THIS LEASE MAY NOT BE ALTERED, WAIVED, AMENDED OR
               ---------
     EXTENDED EXCEPT BY AN INSTRUMENT IN WRITING SIGNED BY LANDLORD AND TENANT.

          (c)  Limitation of Warranties - LANDLORD AND TENANT EXPRESSLY
               ------------------------
     AGREE THAT THERE ARE AND SHALL BE NO IMPLIED WARRANTIES OF MERCHANTABILITY,
     HABITABILITY, FITNESS FOR A PARTICULAR PURPOSE OR OF ANY OTHER KIND ARISING
     OUT OF THIS LEASE, AND THERE ARE NO WARRANTIES WHICH EXTEND BEYOND THOSE
     EXPRESSLY SET FORTH IN THIS LEASE.

AGREED TO AND UNDERSTOOD this the 25th day of March  , 1994
                                  ----        -------    --

LANDLORD:                                    TENANT:

UBP PARTNERS LIMITED                         LATIN AMERICA TELECOMM INC.


BY:[SIGNATURE ILLEGIBLE]                     BY:[SIGNATURE ILLEGIBLE]
   --------------------------------             -------------------------------

ITS: general partner                         ITS: President
    -------------------------------              ------------------------------ 

                                       14

 
                         AMENDMENT TO LEASE AGREEMENT

     This lst Amendment to Lease Agreement is entered into this day of April,
1994, by and between UBP PARTNERS LIMITED, a Texas Limited Partnership
(hereinafter referred to as "Landlord") and LATIN AMERICAN TELECOMM, INC.
(hereinafter referred to as "Tenant"):

                                  WITNESSETH:

     WHEREAS, by Lease Agreement dated March 25, 1994, Landlord leased to Tenant
approximately 4,000 square feet of office space located at 12500 Network Blvd,
Suite 407, in the University Business Park, legally described as Lot 1, Block 1,
New City Block 17386, UNIVERSITY BUSINESS PARK, UNIT 1, in the City of San
Antonio, Bexar County, Texas, according to plat thereof recorded in Volume 9506,
Page 165, Deed and Plat Records of Bexar County, Texas; hereinafter referred to
as the "Lease Agreement"); and

     WHEREAS, Landlord and Tenant desire to amend said Lease Agreement;

     NOW, THEREFORE, in consideration of the premises and the mutual benefits to
accrue to Landlord and Tenant under and by virtue of this lst Amendment to Lease
Agreement, Landlord and Tenant agree that Effective April 8, 1994, the following
designated paragraphs of the Lease Agreement shall be, and are hereby amended as
follows:

     A. PARAGRAPH 1(D) PREMISES.  The size of the Demised Premises covered under
     the term of the Lease Agreement shall be increased from 4,000 square feet
     to 5,042 square feet. That area which comprises the increased square
     footage under this Agreement is identified on the attached "Exhibit "A" and
     contains approximately 1,042 square feet (hereinafter referred to as the
     "Expansion Space").

     B. PARAGRAPH 1(F) Base RENT - AMOUNT AND PAYMENT. Subject to Exhibit "F" of
     the Lease Agreement, the Base Rent payable to Landlord during the term of
     the lease shall be increased to conform with the following schedule:



               Months         Monthly        Annual         Per Square Foot
                                                   
               1-24           1,764.70       21,176.40      4.20

               25-48          2,521.00       30,252.00      6.00

               49-60          2,941.16       35,294.00      7.00


     C. PARAGRAPH 1(E) - Initial COMMON AREA CHARGE. Effective the Delivery
     Date as hereinabove defined, the Initial Common Area Charge shall be
     increased from $160.00 per month to $201.68 per month.

     D. OPTION TO Renew.  The extension terms specified on the Lease Addendum
     shall be paid according to the following schedule:

     1st Option

 
 
               Month          Monthly        Annual         Per Square Foot
                                                   
                1-24          3,361.33       40,336.00       8.00

               25-60          3,781.50       45,378.00       9.00
 

     2nd Option

                                                     
                1-36          4,033.60       48,403.20       9.60

               37-60          4,201.66       50,420.00      10.00
 

 
     E. RIGHT OF FIRST REFUSAL.  The Right of First Refusal specified under
     Paragraph two (2) of the Lease Addendum is hereby amended to provide that
     Tenant will have a Right of First Refusal to lease the following spaces:

     Suite 404 which contains 1,950 square feet.

     The remainder of Suite 407 which contains approximately 675 square feet.

     The Right of First Refusal spaces are outlined in blue on the attached
     Exhibit "A".

     F. PARKING.  In addition to the four (4) parking spaces designated for
     Tenant on Exhibit "G", Landlord will designate twelve (12) spaces for
     Tenant's use behind the Demised Premises.


          Except as herein amended, the Lease Agreement dated March 25, 1994, by
     and between Landlord and Tenant shall remain in full force and effect in
     accordance with its terms and provisions.


          IN WITNESS WHEREOF, the parties herein have hereunto set their hands
     the day and year FIRST above written. 

     LATIN AMERICAN TELECOMM, INC.      UBP PARTNERS LIMITED 


         [SIGNATURE ILLEGIBLE]                  [SIGNATURE ILLEGIBLE]
     By:----------------------               By:---------------------
                                                  Name:
                                                  Title: general partner

     Date: 4-11-94                           Date: 4-11-94
          --------------------                    -------------------

 
                       2ND AMENDMENT TO LEASE AGREEMENT

     This 2nd Amendment to Lease Agreement is entered into this 30th day of
                                                                ---- 
September 1994, by and between UBP PARTNERS LIMITED, a Texas Limited Partnership
- ---------
(hereinafter referred to as "Landlord") and AMERICAN TELESOURCE INTERNATIONAL, a
Texas Corporation, as assignee of LATIN AMERICAN TELECOMM, INC. (hereinafter
referred to as "Tenant"):

                             W I T N E S S E T H:

     WHEREAS, by Lease Agreement dated March 25, 1994, Landlord leased to Tenant
approximately 4,000 square feet of office space located at 12500 Network Blvd,
Suite 407, in the University Business Park, legally described as Lot 1, Block 1,
New City Block 17386, UNIVERSITY BUSINESS PARK, UNIT 1, in the City of San
Antonio, Bexar County, Texas, according to plat thereof recorded in Volume 9506,
Page 165, Deed and Plat Records of Bexar County, Texas, and;

     WHEREAS by a lst Amendment to Lease Agreement executed by both Landlord and
Tenant on April 11, 1994 the size of the Premises was increased from 4,000
square feet to 5,042 square feet, (hereinafter the Lease Agreement and the 1st
Amendment to Lease Agreement are collectively referred to as the "Lease
Agreement") and;

     WHEREAS, Landlord and Tenant desire to further amend said Lease Agreement;

     NOW, THEREFORE, in consideration of the premises and the mutual benefits to
accrue to Landlord and Tenant under and by virtue of this 1st Amendment to Lease
Agreement, Landlord and Tenant agree that Effective April 8, 1994, the following
designated paragraphs of the Lease Agreement shall be, and are hereby amended as
follows:

     A. PARAGRAPH 1(d) PREMISES.  The size of the Demised Premises covered under
     the term of the Lease Agreement shall be increased from 5,042 square feet
     to 6,350 square feet. The area which comprises the increased square footage
     under this Agreement is identified on the attached "Exhibit "A" and is
     referred to as the "Expansion Space".

     B. PARAGRAPH 1(F) Base RENT - AMOUNT AND PAYMENT. Effective November 1,
     1994 or upon delivery and acceptance of the Expansion Space by Tenant,
     whichever date shall occur later, the rent payable to Landlord hereunder
     shall be increased to conform to the following schedule:



            DATE                          MONTHLY                  PER SQFT

                                                             
            11/01/94 - 06/30/95           $2,799.30                $5.29
            07/01/95 - 06/30/96           $2,899.30                $5.48
            07/01/96 - 06/30/97           $3,655.60                $6.90
            07/01/97 - 06/30/98           $3,755.60                $7.10
            07/01/98 - 06/30/99           $4,175.76                $7.90


     Note:  In the event Landlord has not substantially completed construction
            and Tenant has not accepted possession of the Expansion Space on or
            before November 1, 1994, then Tenant will continue paying rent to
            Landlord according to the rental schedule set forth in Section "B"
            of the lst Amendment to Lease Agreement until such time as Landlord
            completes construction and delivers the Expansion Space to Tenant.

     C. PARAGRAPH 1(e) - Initial COMMON AREA CHARGE.  Effective the Delivery
     Date as hereinabove defined, the Initial Common Area Charge shall be
     increased from $160.00 per month to $267.08 per month.

     D. LANDLORD'S IMPROVEMENTS.  Landlord shall construct the finish-out work
     (hereinafter referred to as the "Tenants Improvements") pursuant to the
     Drawings and Specifications attached hereto as Exhibit "B". Following the
     full execution of this Second Amendment to Lease Agreement, Landlord shall
     commence construction of the Tenant Improvements and shall use all
     reasonable efforts to substantially complete the Tenant Improvements on or
     before November 1, 1994. Tenant expressly acknowledges that in the event
     the substantial completion of construction is delayed for reasons beyond
     the reasonable control of Landlord, Landlord will not be liable to Tenant
     in any manner.

     In the event of any delay in the completion of Tenant's Improvements caused
     by Tenant,

 
     Landlord shall not be liable for any damage caused thereby. In the event
     Tenant takes occupancy prior to the completion of Landlord's Improvements,
     Tenant shall provide uninterrupted access to the Premises to Landlord, its
     employees, agents, representatives and governmental inspectors at all
     reasonable times.

     E. OPTION TO RENEW.  The Lease extension terms specified in Section D of
     the lst Lease Amendment are hereby modified to conform to the following
     schedule:

     lst Option

 
 
                    Month          Monthly        Annual         Per Sqft

                                                        
                    1-24           $4,596.83      $55,161.96     $ 8.69

                    25-60          $5,017.00      $60,204.00     $ 9.48

     2nd Option

 
                                                         
                    1-36           $5,269.10      $63,229.20     $ 9.96

                    37-60          $5,437.16      $65,245.92     $10.27


          Except as herein amended, the Lease Agreement dated March 25, 1994, by
     and between Landlord and Tenant and all subsequent Amendments to Lease
     Agreement, shall remain in full force and effect in accordance with its
     terms and provisions.


          IN WITNESS WHEREOF, the parties herein have hereunto set their hands
     the day and year first above written.


AMERICAN TELESOURCE INTERNATIONAL, INC.     UBP PARTNERS LIMITED


By:[SIGNATURE ILLEGIBLE]                    By:[SIGNATURE ILLEGIBLE]   
   ----------------------                      ----------------------- 
Title: President                            Title: general partner
      -------------------                         --------------------

Date:  9-29-94                              Date:     9-30-94
     --------------------                        --------------------- 

 
                                  EXHIBIT "B"
                           UNIVERSITY BUSINESS PARK
                             LANDLORD'S WORKLETTER

     By execution hereof, AMERICAN TELESOURCE INTERNATIONAL, a Texas
Corporation, as assignee of LATIN AMERICAN TELECOMM, INC. (hereinafter referred
to as "Tenant") and UBP PARTNERS LIMITED, a Texas Limited Partnership
(hereinafter referred to as "Landlord") agree to simultaneously execute a 2nd
Lease Amendment ("2nd Amendment") for space ("Premises") at 12500 Network Blvd,
located in University Business Park, ("Building"). Pursuant to Section "D" of
the 2nd Amendment, this Letter Agreement shall become Exhibit "C" thereof.

     In consideration of the mutual covenants hereinafter contained, Landlord
and Tenant do mutually agree as follows:

     Landlord will make improvements and alterations to the Premises (herein
called "Landlord's Work") according to the working drawings and specifications
agreed upon by both Landlord and Tenant, a copy of which is attached hereto as
Exhibit "B-2", and is initialled by both Landlord and Tenant.

     1.   Landlord's Work will be limited to the following:

          a.   Demolition work in existing office #115 and #116.

          b.   Construct two (2) new offices in the Expansion Space, including
               all framing and drywall work. All exterior walls to be framed.

          c.   Install RACO track along all ceilings (aluminum finish).

          d.   Install acoustical drop ceiling including at least two (2)
               lighting fixtures for each office and fixtures for the hallway
               and open area. All fixtures to be 2 ft x 4 ft lay-in fluorescent
               fixtures.

          e.   Install telephone outlets (conduit only), duplex outlets,
               computer outlets (conduit only) and J-boxes at locations marked
               on Exhibit "B-2". All electrical to tie into Tenant's existing
               service.

          f.   Install one (1) 4 ton roof top air conditioning unit with gas
               heat.

          g.   Install carpeting to match carpet in Tenant's current offices.

          h.   All finishes, ie:, doors, hardware, paint and trim to match
               Tenant's existing finishes. Note: floor base molding to have
               "shoe".

     2.   It is agreed, that the Commencement Date of the Lease and Tenant's
          obligation to pay rent (on the Expansion Space), shall be the date
          upon which Landlord substantially completes Landlord's Work as
          described above and delivers the Premises to Tenant, or the date upon
          which Tenant opens for business, whichever date shall occur first.
          "Substantial Completion" shall be defined as the completion of
          construction subject to punch list items. Landlord shall use all
          reasonable efforts to complete Landlord's Work on or before November
          1, 1994. Tenant expressly acknowledges that in the event the
          substantial completion of construction is delayed for reasons beyond
          the reasonable control of Landlord, Landlord will not be liable to
          Tenant in any manner. Notwithstanding the foregoing, where Landlord
          shall be delayed in substantially completing said work as a result of:

          a.   Tenant's failure to approve the final working drawings; or

          b.   Change orders (Note: Tenant shall be responsible for the cost of
               completing any change orders, if any); or

          c.   The performance by a person, firm or corporation, employed by
               Tenant, if applicable, within the Premises which interferes with
               the undertaking of Landlord's work;

          then the commencement of the term of said Lease and the obligation of
Tenant for the payment of rent thereunder shall be accelerated by the number of
days of such delay.

AGREED TO AND UNDERSTOOD this the ___ day of __________, 19__.

LANDLORD                                      TENANT

UBP PARTNERS LIMITED                          AMERICAN TELESOURCE
                                              INTERNATIONAL INC.

By:_______________________                    By:[SIGNATURE ILLEGIBLE]
                                                 ---------------------
Its:______________________                    Its:  President
                                                  --------------------