<PAGE>
 
                                                                   EXHIBIT 10.10

                           In commercial confidence

THE UNDERSIGNED,

 .    PTT Telecom BV, a private company with limited liability under Dutch law
     with its registered office at Prinses Beatrixlaan 23, The Hague, duly
     represented for the present purposes by Rik Luchies, International Sales
     Manager U.S.A. & Canada, of Station 12, the satellite division of PTT
     Telecom, hereafter called `Station 12',

and

 .    SkySite Communications Corporation, a corporation duly organised and
     existing under the laws of California, having its statutory office at 11500
     Sherman Way, North Hollywood 91605, California, U.S.A., duly represented
     for the present purposes by Mayo Overbeck, National Sales Director,
     hereafter called `the Service Provider',

WHEREAS:

 .    Station 12 offers mobile satellite services including but not limited to
     services based on the Inmarsat mini-M service;

 .    based on the Inmarsat mini-M service, Station 12 has developed special
     subscription-offerings, which offerings are marketed by Station 12 under
     the brand name of `Altus';

 .    Station 12 is willing to use third parties referred to as service providers
     and agents to market and sell the Altus subscriptions;

 .    the Service Provider is able and willing to promote, stimulate and offer
     end-users the aforementioned Altus subscriptions;

PARTIES HAVE AGREED AS SET FORTH BELOW:

CLAUSE 1 / DEFINITIONS
----------------------

mini-M Service       :  the telecommunication service as described in Appendix 1
                                                                      ----------
                        offered by Station 12 and enabling communication from,
                        to and between Terminals, through Inmarsat satellite(s)
                        and a land earth station;

Altus Subscription   :  a special offering developed by Station 12, which
                        offering comprises a Connection and a SIM-card;

Connection           :  the possibility of using the mini-M Service;

Terminal             :  movable transmitting and receiving equipment suitable
                        for use of the Mini-M Service;

End-user             :  a natural or legal person who has concluded a contract
                        with the Service Provider for an Altus subscription;

Value Added Services :  the services defined in Appendix 2;
                                                ----------

SP Services          :  the services which the Service Provider itself may
                        develop and provide;

                                       1
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                           In commercial confidence

Facilities            : special telecommunication features incorporated in the 
                        mini-M Service, as described in Appendix 2;
                                                        ----------
                         
Forward ID Terminal   : a unique identification number issued by or on behalf of
                        the Inmarsat organisation to a terminal manufacturer,
                        which number is linked to a Terminal; 

Forward ID SIM-Card   : a unique identification number issued by or on
                        behalf of the Inmarsat organisation to a SIM-Card
                        manufacturer, which number is linked to a SIM-Card; 

SIM-Card              : a subscriber identity module, which has to be used
                        with a Terminal and which enables use of the Mini-M
                        Service through such Terminal; 
CLAUSE 2/SUBJECT
----------------

2.1  Subject to the terms and conditions set out in this contract, Station 12
     grants the Service Provider the right and the Service Provider accepts the
     right to provide Altus Subscriptions as described in Appendix 2, either
                                                          ----------  
     directly or indirectly through intermediaries, to End-users. The Service
     Provider shall pay all charges relating to Altus Subscriptions and Value
     Added Services it has purchased from Station 12. In the event that the
     Service Provider offers its own SP Services to End-users, the Service
     Provider warrants that these services shall not in any way affect the
     proper functioning of the mini-M Service.

2.2  The Service Provider shall act in its own name, fat its own account and at
     its own risk. The Service Provider is not allowed to legally represent
     Station 12 in any way whatsoever,

2.3  The trading area of the Service Provider is defined in the covering letter
     attached to this contract on the understanding that the Service Provider
     shall not be allowed to restrict in any way the possibilities for End-users
     to apply to Station 12 and/or the possibilities for End-users in the
     European Economic Area to apply to other service providers of Station 12
     for the supply of Altus Subscriptions, without enlisting the Service
     Provider. Station 12 has the right to offer Altus Subscriptions in the
     trading area of the Service Provider itself, either directly or indirectly
     through its agents or otherwise.

2.4  Station 12 is entitled to conclude similar contracts with parties other
     than the party to this contract.

CLAUSE 3/PROVISION OF ALTUS SUBSCRIPTIONS
------------------------------------------

3.1  Station 12 shall supply the Service Provider with Altus Subscriptions and
     Value Added Services, which the letter can provide to End-users, possibly
     together with a Terminal or with SP Services.

3.2  Station 12 shall offer various types of Altus Subscriptions. The range and
     content of subscriptions shall be subject to change by Station 12. Station
     12 shall inform the Service Provider accurately in advance of its range of
     subscriptions and any combinations thereof. The different types of
     subscriptions offered by Station 12 are listed in Appendix 1 and 2.
                                                       ----------------

3.3  The Service Provider shall offer the full range of Altus Subscriptions and
     shall ensure that its offerings meet market demand.

                                       2
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                           In commercial confidence

3.4  The contracts concerning Altus Subscriptions shall be concluded with End-
     users by the Service Provider in its own name and at its own expense and
     risk, directly or indirectly through intermediaries. The Service Provider
     shall be fully responsible and liable to Station 12 for all third parties
     used by the Service Provider.

3.5  Altus Subscriptions can be terminated after a minimum period of one year,
     subject to a period of notice of one month. In the event that termination
     has not taken place one month before expiry of the minimum period, the
     agreement for the Altus Subscription shall automatically be extended for
     subsequent one-year periods. The extended agreement can only be terminated
     at the end of the then current one-year period, subject to a period of
     notice of one month. The Service Provider shall terminate the Altus
     Subscriptions via Station 12, using the form contained in Appendix 2.
                                                               ----------

3.6  All intellectual property rights relating to the mini-M Service, the Altus
     Subscriptions and the Value Added Services - including but not limited to
     any such rights to specifications, documentation and other information
     supplied by Station 12 - shall remain vested in Station 12 or the party
     from whom Station 12 has obtained a licence. The Service Provider shall
     acquire no powers in relation to these rights other than those expressly
     stated in this contract.

CLAUSE 4/SIM-CARDS
------------------

4.1  Altus Subscriptions shall be sold and used in combination with Station 12
     SIM-cards. The Service Provider is not allowed to offer Altus Subscriptions
     otherwise, unless it has obtained Station 12's prior written consent
     thereto. The SIM-cards shall be supplied to the Service Provider solely for
     the purpose of delivering Altus Subscriptions to End-users,

4.2  The Service Provider shall ensure it has sufficient SIM-cards available so
     that it will be able to meet the forecasted demand which will mutually be
     agreed. The Service Provider shall fulfil this obligation by ordering the
     agreed amount of cards in good time, according to the ordering procedure
     for SIM-cards as described in Appendix 2.
                                   ----------

4.3  The Service Provider shall owe Station 12 an advance amount for each SIM-
     card as specified in Appendix 2. The Service Provider shall be reimbursed
                          ----------
     for this advance amount if certain conditions, detailed in Appendix 2, are
     met.                                                       ----------
  

4.4  The Service Provider shall be and remain fully responsible and liable to
     Station 12 for the SIM-cards and the use thereof, delivered to the Service
     Provider. This obligation remains in effect, also after the SIM-card has
     been provided to an End-user. The Service Provider shall, as part of this
     obligation, ensure safe storage of the cards to prevent theft and/or misuse
     and shall protect the cards from harmful influences (e.g. corrosive
     substances, static discharges, direct sunlight and chemicals),

4.5  SIM-cards may be exchanged in certain cases. The conditions for such
     exchange as well as the procedure to be followed in that event, are
     detailed in Appendix 2. Appendix 2 also contains warranty provisions
                 ----------  ----------
     applicable to SIM-cards.

4.6  Station 12 remains the owner of the SIM-cards.

4.7  The Service Provider may not, in any way, alter the lay-out of the SIM-
     card.

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                           In commercial confidence

4.8  Station 12 shall be entitled, at its own cost, to exchange SIM-cards
     already supplied to the Service Provider, if deemed necessary by Station 12
     for technical reasons (including but not limited to alterations) relating
     to the SIM-Card and/or the mini-M Service. Reasonable costs incurred by the
     Service Provider in relation to such exchange shall be refunded by Station
     12.

CLAUSE 5 / ACTIVATION OF ALTUS SUBSCRIPTION
-------------------------------------------

     The Service Provider shall comply with the service activation procedure as
     described in Appendix 2.
                  ----------

CLAUSE 6 / TARIFFS AND DISCOUNTS
--------------------------------

6.1  The Service Provider shall owe all amounts for the Altus Subscriptions,
     Value Added Services, Facilities and administrative services purchased by
     the Service Provider from Station 12. The tariffs for the Altus
     Subscriptions are laid down in the covering letter, Separate tariffs for
     Value Added Services, Facilities and administrative services are stated in
     Appendix 2. The recommended prices for Altus Subscriptions at end-user
     ----------   
     level are stated in Appendix 1.
                         ----------

6.2  The Service Provider shall receive the standard fees detailed in the
     covering letter attached to this contract.

6.3  Station 12 may amend the tariffs for the Altus Subscriptions, detailed in
     the covering letter, the separa writing of any amendment as soon as
     possible, taking into account a period of at least one month.

6.4  The stated tariffs are exclusive of Value Added Tax (VAT) and any other
     statutory duties which may be payable.

6.5  The Service Provider shall be liable to Station 12 for all charges relating
     to use by End-users of the Altus Subscription purchased by the Service
     Provider, from the moment on which the Altus Subscription to which the
     amounts relate, is activated. Appendix 2 describes the relevant procedures
                                   ----------    
     in this respect.

CLAUSE 7 / PAYMENT OF FEES TO SERVICE PROVIDER
----------------------------------------------

7.1  Fees due to the Service Provider shall be paid to the Service Provider in
     accordance with the provisions relating thereto in Appendix 2.
                                                        ----------

7.2  Station 12 shall be entitled to set off any amount due to Station 12 by the
     Service Provider against any fee or any other amount due by Station 12 to
     the Service Provider.

CLAUSE 8 / PAYMENT OF ALTUS SUBSCRIPTIONS TO STATION 12
-------------------------------------------------------

8.1  Station 12 shall invoice the Service Provider monthly in accordance with
     the procedure described in Appendix 2 for all amounts owed by the Service
                                ----------                                     
     Provider. Amounts due for Altus Subscriptions shall be payable in US
     Dollars.

                                       4
<PAGE>
 
                           In commercial confidence

8.2  Invoices for the Altus Subscriptions shall contain itemised details of each
     individual Altus Subscription. The details to be itemised and the manner of
     their presentation are laid down in Appendix 2. The itemised information
                                         ----------                        
     shall in any event be sufficient to enable the Service Provider to invoice
     each End-user separately. The Service Provider shall use the itemised
     information only for the purpose for which it is provided and, unless
     obliged by law, shall not disclose such information to parties other than
     the relevant End-user,

8.3  The Service Provider shall pay the amounts stated on the invoices referred
     to in Clause 8.1 within thirty days of the date of invoice through a bank
     transfer to a bank account held and specified by Station 12.

8.4  If payment is not made within the period specified in clause 8.3. the
     Service Provider shall be deemed in default in which case Station 12 shall
     be legally entitled to charge interest and costs for late payment.

8.5  The information registered by Station 12 shall be decisive in determining
     the amounts payable by the Service Provider unless the Service Provider can
     prove that such information is incorrect. Station 12 shall compile the
     information with the care which may be expected in such circumstances.

8.6  In the event that the Service Provider disputes (part of) an invoice, the
     Service Provider shall submit written objections to such invoice within
     thirty days of the date of invoice. The submission of an objection shall
     not entitle the Service Provider to defer payment of the undisputed part of
     the invoice. It an objection is submitted after an invoice has been paid,
     Station 12 shall set off any excess amount - if the objection results in
     modification of the invoice - against the amounts billed on the first
     possible invoice after determination of the excess amount.

8.7  From the date this contract comes into effect to six months after it
     expires or terminates, the Service Provider shall provide at its own
     expense an irrevocable and unconditional bank guarantee payable on demand
     in favour of Station 12 which shall be issued by a bank approved by Station
     12, or shall provide some other form of security as may be agreed by
     parties. Station 12 shall determine the amount of the initial bank
     guarantee. The amount for which a bank guarantee is required may be
     modified by Station 12 once every three months. The Service Provider is
     obliged to provide Station 12 with a bank guarantee for the modified amount
     as soon as possible after such request.

CLAUSE 9 / TAKING CONNECTIONS OUT OF SERVICE
--------------------------------------------

9.1  Station 12 is entitled to take a Connection, provided to the Service
     Provider, out of service if the Service Provider fails to pay amounts owed
     in respect of one or more Altus Subscriptions and is in default by virtue
     of Clause 8.4 and disconnection is justified by the default, or if the
     Service Provider fails in any other way to fulfil its obligations under
     this contract to such an extent that Station 12 can not be expected to
     allow the Connection to remain operational- Station 12 shall be entitled to
     take a Connection out of service without notifying the party in default, if
     an End-user misuses its Connection to such an extent that Station 12 can
     not be reasonably expected to maintain the Connection concerned. Station 12
     shall inform the Service Provider forthwith it this situation arises.

                                       5
<PAGE>
 
                           In commercial confidence

9.2   At the request of the Service Provider, Station 12 shall take a Connection
      Out of service, temporarily or otherwise, according to the procedure
      described in Appendix 2. Station 12 shall charge the Service Provider a
                   ----------                                              
      barring fee, specified in Appendix 2, which barring fee is due for every
                                --------                                     
      request for disconnection made by the Service Provider.

9.3   The provisions of Clause 9.2 shall also apply if Terminals are lost or in
      the event of fraud. In such cases Station 12 shall take the Connection out
      of service directly at the request of the Service Provider and no usage-
      related charges shall be payable from the moment on which the Connection
      concerned is confirmed to be taken out of service.

9.4   The fixed monthly tariffs shall continue to be payable while a Connection
      is out of service until the Service Provider terminates its contract with
      the End-user. If the contract is terminated within a one-year contract
      period as referred to in Clause 3.5, the fixed monthly tariffs shall be
      payable for the remainder of the then current one-year period.

9.5   If an Altus Connection is taken out of service under the provisions of
      Clause 9.1, it shall be activated again after the Service Provider has
      paid the amounts owed to Station 12. If a Connection is taken out of
      service under the provisions of Clause 9.2 or 9.3, it shall be activated
      again in accordance with the procedure detailed in Appendix 2.
                                                         ----------

Clause 10 / Chances to the mini-M Service and to Value Added Services
---------------------------------------------------------------------

10.1  Station 12 has the right to change, modify and improve the mini-M Service
      and/or Value Added Services at any time. Station 12 shall not temporarily
      restrict or discontinue the offered mini-M Service and/or Value Added
      Services without good reason and shall, in the event of restriction or
      discontinuation, resume the mini-M Service and/or Value Added Services
      immediately after the changes, modifications or improvements have been
      made. Station 12 shall notify the Service Provider in advance of planned
      changes, modifications or improvements which may affect use of the mini-M
      Service, Value Added Services and/or Terminals. If timely notification is
      not possible due to the urgent nature of the changes, modifications or
      improvements, Station 12 shall immediately inform the Service Provider and
      parties shall consult on the consequences of such late notification. The
      Service Provider shall not be entitled to any compensation from Station 12
      on the grounds of restriction or temporary discontinuation of the mini-M
      Service and/or Value Added Services.

10.2  Station 12 shall inform the Service Provider in good time of changes in
      the geographical cover of the mini-M Service and of changes in the
      technical characteristics and features and Facilities of the mini-M
      Service and/or Value Added Services, in so far as the changes are
      significant to the Service Provider or End-users. In the event that
      changes restrict the scope of usage of all or some End-users or
      necessitate the modification of Terminals, Station 12 shall consult with
      the Service Provider as early as possible in connection with the nature of
      the changes.

10.3  Facilities which can be made available to End-users in combination with
      Connections shall be introduced in the mini-M Service. Station 12 shall
      inform the Service Provider in good time of the introduction of new
      Facilities.

                                       6
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                           In commercial confidence

CLAUSE 11 / MAINTENANCE AND FAULTS
----------------------------------

11.1  Station 12 shall be responsible for the maintenance of the mini-M Service.
      The Service Provider shall report faults to Station 12 as quickly as
      possible after discovering them. Station 12 shall use its reasonable
      endeavours to clear faults in the functioning of the mini-M Service as
      soon as possible after they are discovered or reported. The procedure for
      the exchange of information between Station 12 and the Service Provider in
      this respect, is described in Appendix 2.
                                    ----------

11.2  The costs of fault clearance shall be borne by Station 12 unless the fault
      is caused by malfunctioning Terminals, or misuse of Terminals, in which
      case Station 12 shall be entitled to charge the Service Provider for the
      cost of the investigation and work involved in clearing the fault.

CLAUSE 12 / MARKETING PLAN, SALES SYSTEM, CO-MARKETING, SERVICE MARKS
---------------------------------------------------------------------

12.1  At least two months before the start of a calendar year, the Service
      Provider shall submit to Station 12 a marketing plan which covers the
      following year. The Service Provider shall update the marketing plan
      during the calendar year if so requested by Station 12. The marketing plan
      shall conform with the requirements laid down in Appendix 3.
                                                       ----------
 
12.2  The direct and indirect sales system of the Service Provider shall be
      subject to special requirements. The Service Provider shall meet these
      requirements by complying to the quality criteria described in Appendix 4.
                                                                     ----------

12.3  The Service Provider shall promote the sale of Altus Subscriptions and the
      Value Added Services of Station 12 effectively and to the best of its
      ability and shall advertise these services by suitable means.

12.4  Station 12 shall support the Service Provider with co-marketing.

12.5  As long as the Service Provider is a party to the contract, it shall have
      the right to use the trade marks, service marks, trade names, brand names
      and logo's of Station 12 and/or its parent company contained in Appendix 6
                                                                      ----------
      for the purpose of providing Altus Subscriptions and acquiring new End-
      users. The Service Provider shall comply with any instructions which
      Station 12 may give for the use of the marks and related designations and
      logos. The same right and obligation shall apply to any new marks which
      Station 12 and/or its parent company may introduce in connection with
      Altus Subscriptions or the mini-M Service.

CLAUSE 13 / END-USER TARIFFS AND GENERAL CONDITIONS
---------------------------------------------------

      Station 12 has established recommended tariffs for all its services, but
      the Service Provider is free to establish its own tariffs and general
      conditions on the understanding that it shall publish its tariffs and
      other general conditions and supply them to any person requesting them.
      The Service Provider shall inform Station 12 of its tariffs and other
      general conditions, as well as all changes made to them, after they have
      taken effect.

                                       7
<PAGE>
 
                           In commercial confidence

CLAUSE 14 / CONTRACTS WITH END-USERS
------------------------------------

14.1  The Service Provider warrants that all contracts for Altus Subscriptions
      and Value Added Services which the Service Provider or a party acting on
      its behalf concludes with End-users include the provisions of this
      contract which affect or concern End-users. The contracts shall in any
      event include provisions on the following matters:
      .  regulations regarding use of the mini-M Service or the Value Added
         Services in so far as these have been imposed by or on behalf of
         Inmarsat and/or the government of the country where the agreement for
         the mini-M Service is concluded and of the country where the mini-M
         Service is used, including but not limited to licensing regulations
         and transborder restrictions in the region and the obligation to use
         only Terminals approved according to legal and/or regulatory
         requirements;
      .  the binding nature of the data kept by Station 12 with regard to the
         charges for the Altus Subscription, the Value Added Services and
         relating to the Forward ID Terminal and the Forward ID SIM-Card;
      .  the submission of complaints by End-users to the Service Provider and
         not to Station 12; a statement that the mini-M Service is not suitable
         for maritime distress and safety purposes ("GMDSS").

14.2  The Service Provider shall manage its databases of End-users in conformity
      with the requirements laid down in the Data Protection Act, if applicable,
      or any other Act on this subject which may apply to the Service Provider.
      Within the framework of this Act and in relation to its End-users the
      Service Provider shall reserve the right to make their names and addresses
      known to Station 12. The Service Provider shall reserve the right to make
      known the names and addresses of its End-users to Station 12 or to other
      Service Providers of Station 12 in the case of expiry or termination of
      this contract as described in Clause 22.2. The Service Provider shall give
      Station 12 the names and addresses of its End-users and provide all
      necessary co-operation if Station 12 needs these details to comply with a
      legal requirement. Station 12, shall use the names and addresses
      exclusively for the purposes described above.

14.3  The Service Provider shall take adequate measures to ensure the
      confidentiality of data concerning End-users. The Service Provider shall
      specifically ensure that no information concerning communication conducted
      by End-users is disclosed, except in cases where the law explicitly
      requires the disclosure of such information,

14.4  The Service Provider shall indemnify Station 12 against claims by End-
      users resulting from inadequate observance of the provisions of Clauses
      14.1, 14.2 and 14.3.

14.5  The Service Provider shall hold End-users liable, in law and otherwise,
      for fulfilment of the obligations to which End-users are subject under
      their contracts with the Service Provider, if Station 12 reports any non-
      observance of such obligations to the Service Provider and the non-
      observance directly damages the interests of Station 12.

CLAUSE 15 / TERMINALS
---------------------

     The Service Provider can purchase Terminals from Station 12, in which case
     a separate agreement for the sale/purchase of Terminals shall be concluded.
     However, the Service Provider is free to choose the Terminals it wishes to
     offer End-users, provided these Terminals meet the conditions laid down by
     low and by Inmarsat.

                                       8
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                           In commercial confidence

CLAUSE 16 / LIABILITY
---------------------

16.1  Station 12 shall not be liable except in the following cases and only to
      the maximum amount stated below per case: 
       - direct damage arising from death or personal injury resulting from the
         non-functioning or incorrect functioning of the mini-M Service and/or
         any Value Added Service, which nonfunctioning or incorrect functioning
         is imputable to Station 12: an amount not exceeding US Dollars 
         500,000.- per event or connected series of events;
       - direct damage to tangible property of the Service Provider resulting
         from the nonfunctioning or incorrect functioning of the mini-M Service
         and/or any Value Added Service, which non-functioning or incorrect
         functioning is imputable to Station 12, costs of repair or replacement,
         with a maximum of US Dollars 500,000.- per event or connected series of
         events.

      If one of the above occurrences results in more then one claim and the
      combined claims exceed the maximum amount stated for such occurrence, the
      claim shall be settled proportionately.

16.2  Station 12 shall not be entitled to invoke an exclusion or limitation
      under Clause 16.1 if the damage concerned has arisen through an act or
      omission it perpetrated intentionally or recklessly in the knowledge that
      the damage was likely to occur.

16.3  The Service Provider shall indemnify Station 12 against all claims by
      third parties, including but not limited to End-users, arising from the
      non-functioning or incorrect functioning of Terminals, equipment, other
      products, SP Services or other services supplied or provided by the
      Service Provider or arising from circumstances imputable to the Service
      Provider, whether or not these circumstances relate to the mini-M Service
      and/or any Value Added Service.

16.4  If an End-user has caused damage to Station 12 for which the Service
      Provider is not liable to Station 12 under this contract, the Service
      Provider shall endeavour to recover the costs involved from the End-user
      at Station 12's written request and expense.

CLAUSE 17 / FORCE MAIEURE
-------------------------

17.1  The obligations of parties under this contract shall be legally suspended
      if performance is made temporarily or permanently impossible by
      circumstances which are beyond the reasonable control of the party
      invoking them.

17.2  The circumstances referred to in Clause 17.1 shall in any event be deemed
      to exist if The authority of Station 12 to allocate numbers is withdrawn
      or suspended and if the licences or permits required for the future
      installation, maintenance or use of a land earth station of Station 12 can
      not be obtained or can not be obtained on time.

                                       9
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                           In commercial confidence

CLAUSE 18 DISSOLUTION OF THE CONTRACT
-------------------------------------

      In addition to The grounds on which an agreement may be dissolved in law,
      either party shall, at any time, be entitled to dissolve this contract
      with immediate effect by written notice to the other party and without
      application to a court of law in the following cases:

       - if the other party has applied for or has been granted suspension of
         payments or if the other party has been declared bankrupt or a petition
         of bankruptcy has been filed; or
       - if the other party has invoked force majeure and the force majeure
         lasts for more than a period of one (1) month or as soon as it is
         established by both parties that it will last for more than a period of
         one (1) month; or
       - if the other party fails to meet any of its obligations under the terms
         of this contract and does not or is not able to remedy such failure
         within fourteen (14) days of a written notice to such effect, or,
         if the notifying letter contains a longer remedy period, within the
         remedy period stated in such letter, unless the failure, given its
         special nature or minor importance, does not justify the dissolution of
         the contract and the consequences flowing therefrom

CLAUSE 19 / TERMINATION ON SPECIAL GROUNDS
-------------------------------------------

19.1  Station 12 has the right to terminate the contract taking into account a
      notice period of fourteen (14) days, if a significant change occurs or has
      occurred in the ownership of the Service Provider, a parent company or a
      holding company or if the Service Provider transfers its business
      activities.

19.2  Station 12 has the right to terminate the contract taking into account a
      notice period of fourteen (14) days, if the Service Provider, the parent
      company, holding company or a company associated with the Service Provider
      intends to operate a land earth station itself.

19.3  Station 12 has the right to terminate the contract forthwith if the
      Service Provider no longer meets the criteria determined by Station 12 and
      laid down in Appendix 7 and/or if the turnover of Altus Subscriptions
                   ----------                                             
      generated by the Service Provider justifies termination. Station 12 shall
      have the right to terminate the contract only after having informed the
      Service Provider in writing that it is in default and the Service Provider
      has failed to meet its obligations within a reasonable term, which term
      shall be determined by Station 12 taking into account the nature of the
      obligation concerned.

19.4  Termination under this Clause shall be effected by means of a written,
      extra-judicial declaration by the party entitled to do so.
 
CLAUSE 20 / DURATION OF THE CONTRACT
-------------------------------------

       The contract shall take effect on the date on which it is signed by both
       parties and shall, subject to the provisions of Clause 18 and 19, remain
       in force for an initial period of two years, Unless the contract has been
       terminated by either party in writing three months before the expiry of
       the initial period, the contract shall automatically be extended for
       subsequent one-year periods. The extended agreement can only be
       terminated at the end of the then current one-year period, subject to a
       period of notice of three months.

                                       10
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                           In commercial confidence

CLAUSE 21 / CHANGED CIRCUMSTANCES, REGULATIONS IMPOSED BY INMARSAT AND THE DUTCH
--------------------------------------------------------------------------------
GOVERNMENT
-----------

21.1  If circumstances occur which are of such a nature that the other party can
      not reasonably and fairly be expected to allow this contract to remain in
      effect unaltered, each party shall be obliged to consult the other with a
      view to altering the contract in accordance with the changed situation. If
      parties can not reach agreement on such an alteration, each party shall
      have the right to dissolve the contract forthwith without giving a period
      of notice and without any liability for compensation.

21.2  Station 12 shall inform the Service Provider of any regulations which the
      Dutch government or Inmarsat impose on Station 12 if Station 12 can not
      comply with the regulations without the co-operation of the Service
      Provider or End-users. In these circumstances the Service Provider shall
      be obliged to cooperate in observing these regulations and shall impose
      obligations to this effect on End-users, if necessary.

21.3  Station 12 is legally bound to comply with a request of low enforcement
      agencies relating to the lawful interception of telecommunication, in
      addition to which Station 12 is legally bound to put the Service Provider
      under the obligation to render its assistance in complying with such
      request. The Service Provider shall render its assistance in this respect
      and shall indemnify Station 12 against claims by third parties for
      compensation of damage related to such lawful interception to the extent
      that the claim for damages is based on the assistance rendered by the
      Service Provider.

CLAUSE 22 / OTHER OBLIGATIONS OF THE SERVICE PROVIDER
------------------------------------------------------

22.1  When the contract expires or is terminated, the Service Provider shall
      immediately:

      - remove all means of advertising which have been supplied in connection
        with this contract for the mini-M Service, Altus Subscriptions and Value
        Added Services of Station 12 and return them if they belong to Station
        12;
      - discontinue all forms of advertising relating to the mini-M Service,
        Altus Subscriptions and Value Added Services of Station 12 and
        discontinue all use of all trade marks, service marks, trade names,
        brand names and logo's of Station 12 and/or its parent company,
        irrespective of their form;
      - return all SIM-cards which have not been supplied to End-users as well
        as SIM-cards of End-users whose contracts have been terminated or
        dissolved;
      - refrain from representing itself as a service provider of Station 12. In
        the event that the Service Provider breaches this obligation, the
        Service Provider forfeits an immediately payable penalty of US Dollars
        25,000,-.

22.2  On expiry or termination of this contract by either party, for whatever
      reason, the following provisions shall apply. Expiry or termination of
      this contract shall automatically, at the same time, lead to (in most
      cases premature) termination of Altus Subscriptions. With regard to
      premature termination of Altus Subscriptions, the Service Provider shall
      immediately owe Station 12 the pro rata part for the remaining contract
      period of each Altus Subscription of the fixed yearly fee, which fee was
      paid to the Service Provider in advance for the total contract year of an
      Altus Subscription. Without prejudice and in addition to this obligation,
      the Service Provider shall also have the following obligations with regard
      to the Altus Subscriptions:

                                       11
<PAGE>
 
                           In commercial confidence

     - the Service Provider is obliged to provide Station 12, within one (1)
       week after the date on which the party terminating the contract has given
       notice, with a data file of the Altus Subscriptions in force containing
       i.a. the following information arranged by subscription; End-user name,
       address, Forward ID Terminal, Forward ID SIM-Card and other relevant
       information (including payment records). In the event that the Service
       Provider does not comply with this obligation, the Service Provider
       forfeits an immediately payable penalty, which penalty shall be
       calculated as follows. The penalty due is the total of all subscriptions
       registered in the name of the Service Provider multiplied by an amount of
       US Dollars 875.- per subscription, In the event that only part of the
       data file is provided, the full penalty, as described in this paragraph,
       shall be due to Station 12. For every week that the Service Provider
       fails to comply with this obligation, the Service Provider forfeits an
       additional immediately payable penalty of US Dollars 100.- per
       subscription registered in the name of the Service Provider.

     - Within one (1) week after the date on which the party terminating the
       contract has given notice, the Service Provider is obliged to inform
       Station 12 in writing concerning settlement of the Altus Subscriptions in
       force at the moment on which this contract comes to an end. There are two
       possibilities in this respect:

       a. the Service Provider and Station 12 may agree on the transfer,
          including the conditions relating to such transfer, of all Altus
          Subscriptions to Station 12. If agreement is reached, transfer of all
          Altus Subscriptions to Station 12 has to be effected at least 1 (one)
          week before the moment on which this contract comes to an end. If
          transfer takes place in accordance with the agreed conditions, the
          Service Provider shall not owe Station 12 the monthly subscription
          charges for the remaining contract periods of such transferred Altus
          Subscriptions;

       b. in the event that transfer does not take place in accordance with the
          agreed conditions or in the event that no agreement on the transfer or
          the conditions relating to it, is reached, the Service Provider shall
          owe Station 12 the monthly subscription charges for the remaining
          contract periods of its Altus Subscriptions.

CLAUSE 23 / APPLICABLE LAW/ COMPLAINTS AND DISPUTES
----------------------------------------------------

23.1  This contract shall be governed by Dutch law,

23.2  The Service Provider shall deal with all complaints received from End-
      users about use of the mini-M Service, Altus Subscription and/or Value
      Added Services, the amount of charges payable and any other matter. If
      complaints can not be dealt with without the co-operation of or provision
      of information by Station 12, Station 12 shall cooperate or provide the
      necessary information.

23.3  Disputes arising from or in connection with this contract shall be
      submitted to the civil court of law having jurisdiction in The Hague, the
      Netherlands.

                                       12
<PAGE>
 
                           In commercial confidence

CLAUSE 24 / NON-DISCLOSURE
--------------------------

24.1  Parties shall treat confidentially all mutual information which comes to
      their knowledge in connection with this contract regarding their
      businesses, their products, their services and their End-users and shall
      not divulge the information or use it for purposes other than those for
      which it was provided without the prior written permission of the party
      which has an interest in the confidentiality of the information, except
      where the information can not reasonably be deemed confidential because of
      its nature and/or purport. Parties shall comply with the non-disclosure
      obligations set out in Appendix 8.
                             ----------

24.2  Parties shall ensure that the same confidentiality is observed by their
      staff and by third parties used by them.

24.3  Clause 24.1 and 24.2 shall continue to apply if this contract expires or
      is terminated. On expiry or termination, parties shall return all
      documents and papers obtained from the other party, which they may
      reasonably assume to be of a confidential nature.

CLAUSE 25 / ASSIGNMENT
----------------------

      Station 12 shall be entitled to assign or transfer any right and/or
      obligation under this contract without consent of the Service Provider.
      The Service Provider may not assign or transfer any right and/or
      obligation under this contract without the prior written consent of
      Station 12, which consent shall not be unreasonably withheld.

CLAUSE 26 / FINAL PROVISIONS
----------------------------

26.1  Parties shall consult one another about matters which may be significant
      in connection with this contract, including but not limited to any
      publicity undertaken jointly or individually.

26.2  Both parties shall refrain from making any statements which suggest a more
      far-reaching form of co-operation with the other party than is justified
      on the basis of this contract. In addition, the parties shall refrain from
      actions which may reasonably be expected to harm the good name of the
      other party among potential End-users or other third parties, especially
      where statements are concerned which can reasonably be expected to come to
      the knowledge of third parties.

26.3  Any claims between parties shall become due immediately upon expiry or
      termination of this contract.

26.4  This contract forms the entire contract between the parties with respect
      to the subject matter of this contract and replaces any and all other
      agreements, proposals, representations, statements or understandings,
      whether verbal or written, between the parties in relation to the subject
      matter hereof

                                       13
<PAGE>
 
                           In commercial confidence

26.5  This contract consists of the cover contract (preamble and articles 1 to
      26 inclusive), the covering letter and the appendices, Amendments to the
      cover contract and to the covering letter shall be binding only if they
      have been recorded in writing and signed by both parties, unless it is
      expressly stipulated in the cover contract that a particular provision may
      be amended unilaterally. The appendices may be amended by Station 12
      unilaterally from time to time. In case of any inconsistencies or
      contradictions between any of the documents which form part of this
      contract, the order of precedence shall be as follows: 
      - covering letter
      - cover contract 
      - appendices


DRAWN UP ACCORDINGLY AND SIGNED IN DUPLICATE IN THE HAGUE, ON SEPTEMBER 15 1997.


For PTT Telecom B.V./Station 12                   For SkySite


/s/ RIK LUCHIES                                   /s/ MAYO OVERBECK
-------------------------------                   -----------------------------
Rik Luchies                                       Mayo Overbeck

International Sales Manager                       National Sales Director
U.S.A. & Canada

                                                  Signature:


                                                  /s/ PHIL KERNAN
                                                  -----------------------------
                                                  Phil Kernan
                                                  President & CFO


                                                  Signature:


                                                  /s/ CHARLES MAYNARD
                                                  -----------------------------
                                                  Charles Maynard
                                                  CEO

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