Sample Business Contracts


Service Agreement - IXC Carrier Inc. and Diamond-Net ISP Inc.

Services Forms


                                SERVICE AGREEMENT

         This  Agreement  is made as of August 15,  1996,  between IXC  Carrier.
Inc.,  a Nevada  corporation  ("Lessor"),  5000  Plaza on the Lake,  Suite  200,
Austin,  Texas 78746,  and  Diamond-Net,  I.S.P.,  Inc., a Missouri  Corporation
("Lessee") 7777 North Bonhomme, Suite 1000, Clayton, Missouri 63105.

         1. Scope and Rates.  Lessor  and/or its  affiliates  own and  operate a
fiber  optic and digital  microwave  telecommunications  system (the  "System").
Lessor desires to lease DS-1, DS-3 or other  telecommunications  capacity on the
System to Lessee.  Lessor shall use its best efforts  (considering  the needs of
its other  customers) to provide Service for which a Marketing  Service Order in
the form attached  hereto as Exhibit A (as such form may be amended from time to
time by  Lessor)  has been  accepted.  The  rates for  Service  are set forth in
Exhibit D, unless  otherwise  specified in the applicable  Purchase  Order.  The
Marketing  Service Order shall contain the  applicable  lease terms for Lessee's
utilization of the System.  Lessee may also order the services listed in Exhibit
B, subject to availability.  Lessor may lease  telecommunications  capacity from
another carrier in order to provide the Services hereunder.

         2.  Payments.  Lessee shall pay Lessor each month within 30 days of the
date of invoice: (i) the monthly lease rate (prorated for any partial month) for
each Available Circuit;  and (ii) the charges for other services  received.  The
first invoice shall be for the first two months;  each invoice  thereafter shall
be for the  following  month.  If any  invoice is not paid when due:  (i) a late
charge shall accrue equal to 1-1/2% (or the maximum  legal rate, if less) of the
unpaid balance per month; and (ii) Lessor may suspend or terminate the Service.

         3. Term. The term hereof shall continue  through the end of the Circuit
Lease  Term  which is last to  expire.  If  Service  continues  thereafter,  the
applicable rates may be renegotiated;  provided,  however, that such rates shall
not exceed the present rates increased by a percentage  equal to the rise in the
Department of Labor,  Bureau of Labor  Statistics,  Consumer Price Index for all
Urban Consumers,  U.S. City Average,  Subgroup "All Items"  (1982-1983=100) (the
"Consumer  Price Index")  during the period  beginning with the first full month
following  the date  hereof  and  ending  with the last full  mouth  immediately
preceding  the date on which the rates  hereunder are to be adjusted and Service
may be terminates by either parry upon 30 days' written notice.  If the Consumer
Price Index ceases to be published  or is  converted  into a different  standard
reference base or otherwise revised, such other index as the parties shall agree
upon in writing  shall be  substituted  for the  Consumer  Price  Index;  if the
parties are unable to agree as to such substituted  index,  such matter shall be
submitted to arbitration. Lessee may terminate any Circuit upon 90 days' notice;
provided that if termination  occurs:  (i) prior to the Activation Date,  Lessee
shall reimburse Lessor for all costs of the implementation of such Circuit;  and
(ii) on or after such  date,  Lessee  shall pay:  (A)

<PAGE>

all charges for Service previously rendered;  and (B) the amount due through the
end of the  applicable  Circuit  Lease Term (Lessor  shall try to re-lease  such
Circuit for such term, refunding to Lessee the amount so collected,  if any). If
Lessor:  (i) fails to provide Service within six months of the Requested Service
Date;  or (ii) fails to cure a material  breach  hereof within 45 days of notice
from Lessee, Lessee may, as its only remedy, terminate the affected Circuit.

         4.  Limits of  Liability.  Lessor  shall not be liable for any  direct,
indirect,  reliance or consequential damages, whether foreseeable or not, or for
any damage to property, loss of profits, cost of replacement services, or claims
of customers for service problem caused by any defect, delay in availability, or
failure in the Service or by any other cause. In no event shall Lessor be liable
in excess of the aggregate amount it has collected from Lessee hereunder. Lessor
shall give Lessee a credit in accordance with its then-current outage policy for
periods  in  which  any  Circuit  loses  continuity  and  fails to  comply  with
applicable  specifications.  Such  credit  shall be  Lessee's  sole  remedy with
respect  to such an event;  provided,  however,  that no such  credits  shall be
allowed  and  Lessor  shall not be liable for any  Service  defect  from  causes
outside  its  control,   including   accidents,   cable  cuts,  fires,   floods,
emergencies,  government regulation,  wars, or acts of God. Lessor shall have no
obligation  to provide  Lessee  with any backup  Circuits  for  Service  ordered
hereunder.  LESSOR  DISCLAIMS  ALL EXPRESS AND  IMPLIED  WARRANTIES  RELATING TO
SERVICE,  INCLUDING BUT NOT LIMITED TO, WARRANTIES OF MERCHANTABILITY OR FITNESS
FOR ANY PARTICULAR PURPOSE.  LESSEE HAS NOT RELIED ON ANY REPRESENTATION NOT SET
FORTH HEREIN.

         5. General Terms.  This Agreement  shall be construed under the laws of
Texas.  All notices shall be in writing and shall be deemed given as of the date
of delivery to the  addresses  set forth  below.  The waiver of a breach  hereof
shall not be  construed  to be a waiver of any  subsequent  breach.  Lessor  may
terminate  this  Agreement  without  liability  if Lessee  becomes  bankrupt  or
insolvent.  Each party may refer any dispute  relating  hereto to arbitration in
Austin,  Texas under the rules of the American Arbitration  Association,  and in
such event neither party may commence any action based on such dispute,  and any
action  which has been  commenced  shall be stayed,  pending the outcome of such
arbitration. Each party shall pay its own costs, expenses and attorneys' fees in
connection with any  arbitration  proceeding,  unless the  arbitration  award in
connection  therewith  specifies  otherwise.  If any term  hereof  is held to be
invalid or unenforceable, this Agreement shall be construed without such invalid
or  unenforceable  term.  This  Agreement  is the entire  agreement  between the
parties  pertaining to the Circuits.  This  Agreement may only be modified by an
instrument  in writing  executed  by each party.  Neither  party may assign this
Agreement  without the written  consent of the other party;  provided,  however,
that a  security  interest  in this  Agreement  may be  granted by Lessor to its
lenders so long as such lenders agree in writing to fulfill Lessor's obligations
hereunder. Subject to the limitations of liability set forth in

<PAGE>

Section 4 above,  Lessee shall not  disclose to any third party any  information
regarding  the  rates  hereunder.  Each  party  (each,  an  "Indemnitor")  shall
indemnify the other party (each,  an  "Indemnitee")  for any damage or liability
incurred by the Indemnitee arising from the Indemnitor's  intentional misconduct
or  negligence.  The rates  hereunder  do not include any sales,  use or utility
taxes.  Lessee shall pay to Lessor any such taxes that Lessor may be required to
collect or pay.

         6.  Definitions.  For purposes hereof:  "Available" means all necessary
equipment for a Circuit has been installed.  "Activation  Date" means the date a
Circuit is first made Available to Lessee. "Circuit" means a DS-0, DS-1 or DS-3.
"Circuit  Lease Term" means the term of a Circuit  specified  in the  applicable
Purchase Order. "Circuit Mileage" means the length of a Circuit specified in the
applicable  Purchase Order.  "DS-0" means a circuit complying with TR-TSY-000333
"Switched  and  Special  Access  Services -  Transmission  Parameter  Limits and
Interface  Combinations"  Issue 1, July 1990.  "DS-1" means a circuit  complying
with AT&T Tech. Ref. Pub. 62411, December 1990, with Addendum 1, March 1991, and
Bellcore  TR-MWT-000499,  Issue 5,  December  1993.  "DS-3" shall mean a circuit
meeting the  specifications  set forth in AT&T  Technical  Reference  Pub. 54014
Addendum 1, November 1992 and Bellcore  TB-NWT-608499,  Issue 5, December  1993.
"Purchase Order" means any Lessee purchase order accepted by Lessor.  "Requested
Service  Date"  means the date  Service on a Circuit is  requested  to  commence
specified in the applicable Purchase Order. "Service" means transmission service
provided  between North  American DSX standard  cross-connect  panels located in
Lessor's terminal locations.

         To  confirm  their  agreement  to be bound  hereby,  the  parties  have
executed this agreement below:

IXC Carrier, Inc.                               Diamond Net, I.S.P., Inc.
5000 Plaza on the Lake, Suite 200               7777 North Bonhomme, Suite 1000
Austin, Texas 78746-1050                        Clayton, MO 63105
Attention: Contract Administration              Attention:  Kevin Yarbrough
Telephone No.: (512) 328-1112                   Telephone No.: (314) 727-5596
Facsimile No.: (512) 328-7902                   Facsimile No.: (314) 727-0180

By:  /s/ John R. Flemming                       By:  /s/ Andrew Gladney
    --------------------------------               -----------------------------
         John R. Flemming,                               Andrew Gladney,
         Executive Vice President                        President & CEO
------------------------------------            --------------------------------
 (Please Print - Name and Title)                (Please Print - Name and Title)

<PAGE>


                                LIST OF EXHIBITS

Exhibit A             Form of Purchase Order

Exhibit B             Maintenance and other Additional Services

Exhibit C             List of On-net Cities

Exhibit D             List of Rates for Service


<PAGE>
                                    EXHIBIT B

                          CUSTOMER MAINTENANCE SUPPORT

         IXC Carrier,  Inc.'s (hereinafter referred to as IXC) standard fees for
customer  maintenance  support services are as follows (unless set by precedence
in a service contract):

         Maintenance  services  shall be defined as all work performed by IXC on
equipment  provided  by or on  behalf of the  Customer,  or  supervision  of the
Customer's work within IXC's terminate  facilities.  Maintenance Service charges
are not billed for troubles  found within that portion of a circuit  provided by
IXC. The following billing rates apply for these services:

                  A. *  per  hour (4 hour  minimum - if  dispatch  is  required)
Monday  through  Friday during the business hours of 8:00 a.m. - 5:00 p.m. local
time, exclusive of the following holidays:

                           New Years Day
                           President's Day
                           Memorial Day
                           Independence Day
                           Labor Day
                           Thanksgiving Day and the day after Thanksgiving
                           Christmas Day

                  B. * per  hour (4  hour  minimum) for overtime work done after
business hours (defined above) and/or on holidays (defined above) and/or all day
on Saturdays and Sundays.

                  C. As requests for maintenance services are typically made via
telephone,  IXC  must  be  advised,  in  writing  as to the  person(s)  who  are
authorized to request service.  It is the Customer's  responsibility to keep IXC
apprised of any changes to its list of representative(s).

                  D.  To  request  technical   assistance  and  help  under  the
maintenance  services,  a call  must be made to out  Network  Control  Center at
1-800-526-2488.  This  number  should  be  used  for IXC  technical  assistance,
troubleshooting  or testing of circuits,  not for service impairment or outages.
The  person  calling  in must be on the  authorized  list in order to commit for
charges for this  technical  assistance.  If that person is not on the list, the
request cannot be accommodated.

                          1. The Network Control Center  personnel will take the
         call,  record  the  caller's  name and phone  number  along  with facts
         concerning the assistance and support  needed.  The caller will then be
         given the number of the "Assistance Ticket."

                                  Page 1 of 4
<PAGE>

                          2. Upon completion of work, this  "Assistance  Ticket"
         will be given to IXC's  Accounting  Department,  and the customer  will
         subsequently  be billed based upon the  information  on that ticket.  A
         copy will be attached to the invoice.

                  E.  Except  for   emergencies,   IXC  technicians   cannot  be
dispatched  unless  requests  are made in  accordance  with the  above  call-out
procedure.







                                  Page 2 of 4
<PAGE>


                  ANCILLARY PRICING SCHEDULE FOR ON-NET SERVICE



NON-RECURRING CHARGES                                                DS-1                    DS-3
---------------------                                                ----                    ----
                                                                                       
New Order Installation (On-Net)                                      *                          *

New Order Installation (Off-Net)                                     *                          *

DS-1 Ramp-Up per DS-O                                                *                          *

Order Change (less than 5 business days)                             *                          *

Order Cancellation (less than 5 business days)                       *                          *

ASR (new or disconnect) (Special Access Only)                        *                          *

ASR Supplement                                                       *                          *

Order Expedite                                                       *                          *

Reconfiguration                                                      Same as install         Same as install

MONTHLY RECURRING CHARGES                                            DS-1                    DS-3
-------------------------                                            ----                    ----

Monthly circuit charge (IXC portion)                                 *                         *

Cross-connect charge                                                 *                         *
    Other Interexchange Carrier to Lessor local access
    or bypass facility (Lessor long haul not involved)

Local bypass charge                                                  *                         *
    Lessor POP to Lessor POP in same city, with no
    Lessor long haul attached at either Lessor POP

MISCELLANEOUS                                                        RECURRING               NON-RECURRING
-------------                                                        ---------               -------------

M13 1 yr Term                                                            *                        *
    2+yr Term                                                            *                        *
    3+yr Term                                                            *                        *
ECHO CANCELLER (per circuit end)                                         *                        *
SECOND END LOOP (Ex: for ADPCM)                                          *                        *
DEMAND MAINTENANCE                                                   */hr 8a.m.-5p.m. M-F, 4 hour minimum
                                                                     if dispatch is required; */hr after hours
                                                                     with 4 hour minimum
RACK SPACE                                                           * - subject to availability
SHELF SPACE                                                          */ea/mo              ICB install
DC POWER                                                             */amp/mo (5 amp minimum; 5 amp
                                                                     increments)
CIF AC/DC POWER                                                      *
ALL OTHER SERVICES                                                   See Note (2)


(1)  All of the above charges are subject to change with a 30-day notice.
(2)  Services not described above will be considered special handling and
     charges will be assessed on an individual basis.

                                  Page 3 of 4
* CONFIDENTIAL TREATMENT REQUESTED
<PAGE>

DSO ANCILLARY PRICING

New Order Installation                                                        *

Order Cancellation Prior to Turn up                                           *

Order Expedite                                                                *

Reconfiguration (City Pairs the Same)                                         *

DACS Charge (Switching Only)                                                  *

DS0 DACS Port Charge (Bell access at DACS)                                    *

DS1 DACS Port                                                                 *

Minimum Charge per DS-0                                                       *

Notes:

1.   All of the above charges are subject to change with a 30 day notice.

2.   Services  not  described  above will be  considered  special  handling  and
     charges will be assessed on an individual basis.

* CONFIDENTIAL TREATMENT REQUESTED


                                  Page 4 of 4
<PAGE>


                                    EXHIBIT C
                           ON-NET DS-1 AND DS-3 CITIES




                                                                                  
ARIZONA                                   DISTRICT OF COLUMBIA                           Flint
  Phoenix  LATA 666                         Washington, D.C.  LATA 236                     2001 S. Grand Traverse
    Phelps-Dodge Twr, Ste 1702              1828 L Street, N.W., Ste 260                     (313)767
    2600 N. Central (602)279                  (202)833
                                                                                         Grand Rapids
Tucson  LATA 668                          ILLINOIS                                         209 Graham, S.W.
   Arizona Bank Bldg.                       Chicago  LATA 358                              (616)235
   33 N. Stone, Suite 1610                  Prudential Building
    (520)792                                130 E. Randolph, Suite 4001                  Jackson
                                              (312)861                                     170 W. North Street
CALIFORNIA                                                                                   (517)783
  Bakersfield  LATA 734                   INDIANA
   1430 Truxton Ave., Ste 730               Indianapolis  LATA 336                       Kalamazoo
    (805)327                                Merchants Bank Bldg.                           303 Mills St.
                                            11 S. Meridian                                   (616)385
  Fresno  LATA 728                          Suite 1798/1799
   4605 E. Vine                               (317)637                                   Lansing
   (209)486                                                                                230 South St.
                                          Southbend  LATA 332                              (517)482
  Fresno Ter                                211 West Washington St.
   Guarantee Savings                        19th Floor                                   Midland
   B1171 Fulton Mall, Ste. 1201               (219)233                                     1000 Jefferson
    (209)268                                                                                 (517)631
                                          MARYLAND
  Los Angeles  LATA 730                     Baltimore  LATA 238                          Pontiac
   One Wilshire                             1220 S. Howard                                 324 S. Saginaw
   624 S. Grand, Suite 1615                   (301)752                                       (313)338
    (213)689
                                          MICHIGAN                                       Royal Oak
  San Diego  LATA 732                       Ann Arbor                                      3100 W. 14 Mile Rd.
   8933 Complex Dr.                         1615 Plymouth Rd.                                (313)435
    (619)569                                  (313)994
                                                                                         Saginaw
  San Francisco  LATA 722                   Battle Creek                                   315 Meredith
   Metropolitan Life Bldg.                  175 Main Street                                  (517)771
   425 Market St, Ste 3800C                   (616)962
    (415)543                                                                             MISSOURI
                                            Bay City                                       Kansas City  LATA 524
  Sunnyvale  LATA 722                       100 E. Hart                                    Bank of Kansas City
   111 Uranium                                (517)667                                     1125 Grand Ave., Suite 1704
    (408)739                                                                                 (816) 283
                                            Detroit  LATA 340
COLORADO                                    Book Bldg. Suite 2609                          St. Louis  LATA 520
  Colorado Springs  LATA 658                1249 Washington Blvd.                          900 Walnut, Suite 220
   102 S. Tejon, Suite 780                    (313)961                                       (314)231
    (719)471
                                            Detroit                                      NEVADA
 **Denver  LATA 656                         1860 Gratiot Ave.                             **Las Vegas LATA 821
   Bell Building                              (313)259                                      Centel Bldg, Ste 400
   931 14th Street, Ste. 622                                                                125 S Las Vegas Blvd.
    (303)572                                                                                  (702)388



                                  Page 1 of 3

<PAGE>




                                                                                       
NEW JERSEY                                     Tulsa  LATA 538                                Harlingen  LATA 568
  Newark  LATA 224                               Lookout Mountain                               513 E. Jackson
    744 Broad Street, 3rd Floor                  3500 S. 26th West Avenue                       Matz Building
    (201)824                                     (918)584                                       (210)425
                                                 (918)446
NEW MEXICO                                                                                    Houston  LATA 560
  Albuquerque  LATA 664                      PENNSYLVANIA                                       293 N. Main Street
    200 Lomas Blvd, N.W.                       Philadelphia  LATA 228                           (713)224
    13th Floor                                   2401 Locust St., 2nd Floor
    (505)247                                     (215)564                                     Lubbock  LATA 544
                                                                                                1220 Broadway, #1901
NEW YORK                                       Pittsburgh  LATA 234                             (806)762
  New York  LATA 132                             Oliver Building
    60 Hudson St., Ste 206                       535 Smithfield St., Ste 2650                 McAllen  LATA 568
    (212)285                                     (412)281                                       200 S. 10th Street, Suite 704
                                                                                                (210)687
OHIO                                         TEXAS
  Akron  LATA 325                              Abilene  LATA 550                              Midland  LATA 542
    1 Cascade Plaza, Ste 1950                    1049 N. Third, Suite 500                       KMID-TV Studio
  Main & Bowery                                  (915)675                                       La Force Blvd &
  (216)535                                                                                      Air Terminal
                                               Amarillo  LATA 546                               (915)561
  Cincinnati  LATA 922                           Amarillo Petroleum Bldg.
    2300 Carew Tower                             203 W. 8th, Suite 607/608                  San Angelo  LATA 961
    Suite 4701                                   (806)373                                       36 E. Twohig, 15th Floor
    441 Vine St. (513)651                                                                       (915)653
                                               Austin  LATA 558
  Cleveland  LATA 320                            621 Pleasant Valley Road                     San Antonio  LATA 566
    R.F. Keith Bldg., Suite 2117                 (512)389                                       660 S. Santa Rosa
    1621 Euclid Ave.                                                                            (210)225
    (216)771                                   Corpus Christi  LATA 564
                                                 606 N. Carancahua, Ste 816                   Waco  LATA 556
  Columbus  LATA 324                             Wilson Plaza                                   100 S. 26th Street
    Borden Bldg., Level 2B                       (512)882                                       (817)750
    180 E. Broad St.
    614(469)                                   Dallas  LATA 552                              **Priced on an Individual
                                                 Tower of the Americas                         Case Basis (ICB)
  Dayton  LATA 328                               2323 Bryan, Suite 380
    1 National Bank Bldg.
    Suite 2220                                   2223 Houston St.
    130 W. Second (513)461                       (214)954 (214)969

  Toledo  LATA 326                             El Paso  LATA 540
    319 Madison Ave., Ste 2901                   El Paso National
    (419)242                                     Bank Bldg.

OKLAHOMA                                         201 E. Main, Suite 1702
  Oklahoma City  LATA 536                        (915)533
    Liberty Tower
    100 N. Broadway, Ste 3020                  Fort Worth  LATA 552
    (405)232                                     WT Waggoner Blvd.
                                                 810 Houston Suite 1705
                                                 (817)870


                               Page 2 of 3

<PAGE>




INSTALLED DS-0 CITIES                                               AUGUST, 1996

                                                                
ARIZONA                                  NPA/NNX                       TEXAS                            NPA/NNX
      Phoenix                            602-279
                                                                       Austin                             512-389
CALIFORNIA                                                             Corpus Christi                     512-883
                                                                       Dallas                             214-741
      Los Angeles                        213-622                       El Paso                            915-533
      San Diego                          619-419                       Fort Worth                         817-777
      Stockton                           209-463                       Harlingen                          210-425
                                                                       Houston                            713-224
DISTRICT OF COLUMBIA                                                   San Antonio                        210-222
      Washington, DC                     202-245                       McAllen                            210-632

ILLINOIS
      Chicago                            312-861                 VIRGINIA
                                                                       Norfolk                            804-622
MARYLAND
      Baltimore                          410-752                 TOTAL DS-O CITIES                        26

MICHIGAN                                                         All cities are equipped for DSO services.
      Birmingham                         313-435
                                                                 Additional cities will be added if cost
MISSOURI                                                         is justified.
      Kansas City                        816-221
      St. Louis                          314-231

NEW MEXICO
      Albuquerque                        505-247

NEW YORK
      New York City                      212-285

OHIO
      Dayton                             513-252

OKLAHOMA
      Oklahoma City                      405-232
      Tulsa                              918-582

PENNSYLVANIA
      Philadelphia                       215-988                    NPA/NNX
      Austin                             512-389
      Corpus Christi                     512-883
      Dallas                             214-741
      El Paso                            915-533
      Fort Worth                         817-777
      Harlingen                          210-425
      Houston                            713-224
      San Antonio                        210-222
      McAllen                            210-632



                       Page 3 of 3
<PAGE>
                                    EXHIBIT D
                            List of Rates for Service
                            -------------------------

                                 On-Net Service
                                 --------------

DS-0 Service                                                   I.C.B.

DS-1 Service                                                   .1410

DS-3 Service                                                   I.C.B.

Service is for a one (1) year term for On-Net.

                                 Off-Net Service
                                 ---------------

DS-0 Service                                                   I.C.B.

DS-1 Service                                                   I.C.B.

DS-3 Service                                                   I.C.B.

Service  is for a one (1)  year  term or the  term  of the  Underlying  Carrier,
whichever is greater.


                                  Page 1 of 1
<PAGE>


                                                                                   ------------------
                                                                          
Req'st Svc. Date:                                     EXHIBIT A                     OFFICE USE ONLY
                 -----------------                IXC CARRIER, INC.
      Accepted Earlier Activation:           MARKET SERVICE ORDER (MS0)
Y       N                                                                          MSO#
 ------  ----------                                                                    ------------
Ckt ID:
        ----------------------                                                     ------------------
         PURCHASE ORDER FORM FOR CUSTOMER ORDER NO:
                                                   --------------------
Pursuant to the DIGITAL SERVICE AGREEMENT by and between IXC CARRIER, INC.
As LESSOR and                                                                           as LESSEE,
              --------------------------------------------------------------------------
dated            ,  19   ,  LESSEE orders and LESSOR shall provide the following Digital Transmission Service:
       ----------     ---
   New                      Renew                                  Qty        Rate       Term           Miles
           ---------------             --------------
   Cancel                   Disconnect                 DS-3
           ---------------             --------------           ----------  ---------  ----------  ----------------
   Change                   Expedite   Y      N        DS-1
           ---------------              -----  ------           ----------  ---------  ----------  ----------------
   On Net                   Off Net                    DS0
           ---------------             --------------           ----------  ---------  ----------  ----------------
   Protocol                 Reconfigure                CIF
           ---------------             --------------           ----------  ---------  ----------  ----------------
   Other                                               Other
           ------------------------------------------           ----------  ---------  ----------  ----------------
   Customer Contact:                                   Phone #:                      Fax #
                     --------------------------------          --------------------       -------------------------
   Technical Contact:                                  Phone #:                      Fax #
                     --------------------------------          --------------------       -------------------------
   CITY LOCATION A:                                    CITY LOCATION B:
                     --------------------------------                  --------------------------------------------
-------------------------------------------------------------------------------------------------------------------
   Special                    Switched                 Special                           Switched
           ----------                    ------------           ----------                         ----------------
   Bypass Y      N            Owner                    Bypass   Y       N                Owner
            ---    ----                  ------------             ----    -----                    ----------------
   LESSOR TO PROVIDE:         CFA:       Y     N       LESSOR TO PROVIDE:                CFA:      Y       N
                                           ---  ----                                                 ----    ------
   LOA:    Y      N           ASR:       Y     N       LOA:     Y      N                 ASR:      Y       N
             ---    ---                    ---  ----              ---    ----                        ----    ------
   CUSTOMER (LESSEE) TO PROVIDE:                       CUSTOMER (LESSEE) TO PROVIDE:
   LOA:    Y      N      Coordinated Convert Y     N   LOA:     Y      N       Coordinated Convert Y       N
             ---    ---                        ---                ---    ---                         -----   ------
   CIF Arrangement  Y     N      CIF Attach  Y     N   CIF Arrangement  Y      N        CIF Attach Y       N
                      ---   ---                ---                        ---    ---                 ----    ------
   Special Instructions                               Special Instructions
                       ------------------------------                     -----------------------------------------
-----------------------------------------------------  ------------------------------------------------------------
-----------------------------------------------------  ------------------------------------------------------------

MONTHLY LEASE RATE:                                    NON RECURRING CHARGES:
Monthly IXC Charge:     $                              Installation$                   ASR:      $
                         ----------------                           ----------------              -----------------
Eqpt. Lease Charge:     $                              Installation$                   Reconfig  $
                         ----------------                           ----------------              -----------------
Echo Canceller:         $                              Installation$                   Expedite  $
                         ----------------                           ----------------              -----------------
CIF Racks:              $                              Installation$
                         ----------------                           ----------------
CIF Power:              $                              Installation$
                         ----------------                           ----------------
Other:                  $                              Installation$
                         ----------------                           ----------------
TOTAL:                  $                              TOTAL OF NON RECURRING CHARGES:            $
                         ----------------                                                          ----------------
     Notwithstanding  anything in the Digital Service Agreement to the contrary,
     (1) a security  interest in this  Agreement may be granted by Lessor to any
     Lender  and (2)  Lessor  may from time to time  assign  all its  rights and
     obligations  hereunder with respect to any Circuits to any Affiliate.  Upon
     such  assignment  herein  this  Agreement  shall be deemed  to be  multiple
     agreements,  each  upon the terms and  conditions  set forth  herein by and
     between  Lessee and such  affiliate  with respect to such  circuit  between
     Lessor and Lessee with respect to the circuit not so assigned.

     IN WITNESS  WHEREOF,  the parties have executed this PURCHASE  ORDER on the         day of           19
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     LESSOR APPROVAL/TITLE                                   LESSEE AUTHORIZED REPRESENTATIVE/TITLE
     (Service Provider)                                     (Customer)



                               

                                  PLEASE FAX THIS DOCUMENT TO CUSTOMER SERVICE FAX # (512) 328-7810

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For Office Use Only Version 2.0    4/11/95
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<PAGE> AMENDMENT NO. 1 TO SERVICE AGREEMENT CONFIDENTIAL MATERIALS HAVE BEEN OMITTED FROM THIS EXHIBIT PURSUANT TO A REQUEST FOR CONFIDENTIAL TREATMENT AND HAVE BEEN FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION. ASTERISKS DENOTE OMISSIONS. This Amendment No. 1 to Service Agreement (this "Amendment") is made as of October 22, 1996 (the "Amendment Effective Date") by and between IXC Carrier, Inc., a Nevada corporation ("Lessor"), and Diamond.Net, I.S.P., Inc., a Missouri corporation ("Lessee"). BACKGROUND This Amendment is made with reference to the following facts: A. Lessee and Lessor are parties to that certain Service Agreement (the "Agreement") dated as of August 15, 1996. B. The parties desire to amend the Agreement pursuant to the terms set forth below. Each capitalized term used and not elsewhere defined herein shall have the meaning set forth for it in the Agreement. TERMS OF AMENDMENT Accordingly, in consideration of the mutual promises set forth below, the parties hereto hereby agree as follows: 1. The following paragraphs are hereby added to the end of Section 1. Scope and Rates of the Agreement to read in their entirety as follows: Lessee may, at its option, reconfigure On-net DS-0, DS-1 or On-net DS-3 Circuits by disconnecting such Circuits and simultaneously ordering new On-net Circuits from Lessor's unused capacity, but only if all the following conditions are met: (i) such Circuits to be disconnected have been in service at the time of such reconfiguration for at least three months (for DS-0 and DS-1 Circuits) or six months (for DS-3 Circuits), (ii) Service capacity on each such new Circuit is available from Lessor (Lessor shall not be obligated to construct new Circuit capacity to fill any Marketing Service Order); (iii) Lessee shall pay for such reconfiguration the charge therefore set forth in Exhibit B; and (iv) the aggregate monthly invoicing hereunder for the new Circuits involved in such reconfiguration must be equal to, or greater than, the aggregate monthly invoicing for the disconnected Circuits. Lessee shall have the right to reconfigure on-net service and such on-net reconfiguration, so long as it results in an upgrade in service and revenue to Lessor, shall be reconfigured at * of the normal reconfiguration charges on the ancillary pricing exhibit. Lessor may in the future offer high-capacity services of on-net OC-3C service or larger capacity services. In the event Lessor offers 1 * CONFIDENTIAL TREATMENT REQUESTED <PAGE> such on-net services, Lessee may reconfigure existing circuits into such high-capacity services on mutually agreeable terms. Notwithstanding the foregoing paragraph, Lessee's existing DS-1 Circuit (the "Existing DS-1 Circuit") between St. Louis and Kansas City (No. DNN017903) shall be made a part of a DS-3 Circuit ordered by lessee (the "Ordered DS-3 Circuit") between St. Louis and Kansas City, Lessee shall be charged only for the Ordered DS-3 Circuit and not for the Existing DS-1 Circuit as of the date the Ordered DS-3 Circuit is activated or the Amendment Effective Date, whichever is later (the "Start Date"), and Lessee shall remain responsible for any charges incurred in connection with the Existing DS-1 Circuit prior to the Start Date. Lessee shall order each of the Circuits set forth in Phase I of Exhibit E (the "Phase 1 Circuits") on or before November 29, 1996 and each of the Circuits set forth in Phase 2 of Exhibit E (the "Phase 2 Circuits") on or before May 1, 1997. Prior to ordering the Phase 2 Circuits, Lessee may elect to replace any of the Phase 2 Circuits with Circuits originating and/or terminating in different cities (the "Replacement Phase 2 Circuits") subject to availability by Lessor; provided, however, that Lessee shall pay for the Replacement Phase 2 Circuits at the rates set forth in Exhibit D and the aggregate monthly lease rate for the Replacement Phase 2 Circuits must be equal to, or greater than, the aggregate monthly lease rate for the replaced Circuits. The monthly lease rate for each of the Phase I Circuits shall be $0 for the five month period immediately following the activation date of each Circuit in Phase I (the "Five Month Free Period") and Lessee's first invoice for the Phase I Circuits shall be for two months Service for each Phase I Circuit and be due within the 30 day period immediately following the Five Month Free Period. The monthly lease rate for the Phase 2 Circuits shall be $0 for the one month period immediately following the activation date of each Circuit in Phase 2 (the "One Month Free Period") and Lessee's first invoice for each of the Phase 2 Circuits shall be for two months Service for the Phase 2 Circuits and be due within the 30 day period immediately following the One Month Free Period. In the event Lessor fails to provide the Service within 60 days of the Requested Service Commencement Date for any Circuit, then (a) Lessee, at its option, may terminate that Service on the affected Circuit without any liability whatsoever and (b) Lessee's * Take-or-Pay Commitment (set forth below) shall be reduced by the total aggregate monthly lease rates of the Circuits which could not be supplied by Lessor within such period (the "Unsupplied Circuits") if Lessee procures the Unsupplied Circuits from another carrier and provides Lessor with a copy of an invoice from such 2 * CONFIDENTIAL TREATMENT REQUESTED <PAGE> carrier within 90 days from the Requested Service Commencement Date. Lessor shall provide Lessee with Circuit routing information for all on-net Circuits ordered hereunder for Lessee's network planning purposes as soon as such information is available. Lessee shall have a Take-or-Pay Commitment of * per month beginning July 1, 1997 and continuing 60 months thereafter (the "Take-or-Pay Commitment Period")." 2. The following sentence is hereby added to the end of Section 2. Payments of the Agreement to read in its entirety as follows: "Notwithstanding anything herein to the contrary, no termination of this Agreement or any Circuit shall affect or reduce Lessee's obligation to make the "Take-or-Pay Commitment" payments required by Section 1; other than as set forth in Section 1. Scope and Rates above." 3. The first sentence of Section 3. Term of the Agreement is hereby amended to read in its entirety as follows: "The term of this Agreement shall commence upon the date hereof and shall continue until the later of: (i) the end of the Take-or-Pay Commitment Period; and (ii) the end of the Circuit Lease Term of the Circuit ordered hereunder which is last to expire." 4. The definition of "Take-or-Pay Commitment" is hereby added to the end of Section 6. Definitions of the Agreement to read in its entirety as follows: "Take-or-Pay Commitment" shall mean, with respect to a certain period and amount, that Lessee has the obligation to pay for Service hereunder in such amount for each month during such period, whether or not such Service is used. Charges for Services other than DS-0, DS-1, DS-3, OC type services and monthly recurring ancillary services (such as installation, local loops and any other services) shall not be counted toward the Take-or-Pay Commitment." 5. The Non-Recurring Charge for New Order Installation of each On-Net DS-3 as set forth in Exhibit B of the Agreement is hereby increased from * to * and the following paragraph is hereby added to the end of Exhibit B to read in its entirety as follows: "For purposes of this Exhibit B, "Configuration" means the relative arrangement, Phases, or connection pattern of a circuit and its subcomponent parts/objects; "Reconfiguration" means any change from 3 <PAGE> the original configuration of a circuit specified in an original Marketing Service Order; "Cross Connect" means a point in a network where a circuit is connected from one facility to another by cabling between the equipment. 6. Exhibit D of the Agreement is hereby amended to read in its entirety as set forth in Exhibit D hereto. 7. Exhibit E hereto is hereby added to the Agreement as Exhibit E thereto. 8. This Amendment is effective as of the Amendment Effective Date. 9. To the extent amended hereby, this Amendment supersedes the Agreement and any prior written or oral agreement between the parties with respect to the subject matter contained in this Amendment. All other terms and conditions of the Agreement not specifically amended herein shall remain in full force and effect. IN WITNESS WHEREOF, the parties have executed this Amendment. IXC CARRIER, INC. DIAMOND.NET, I.S.P., INC. By: /s/ John R. Flemming By: /s/ Andrew Gladney ------------------------------------------------- ------------------------------------------------- Name: John R. Flemming Name: Andrew Gladney ------------------------------------------------ ------------------------------------------------ Title: Executive Vice President Title: President & CEO ----------------------------------------------- ----------------------------------------------- ----------------------------------------------------- ----------------------------------------------------- Approved as to form Legal dept. 4 <PAGE> -------------------------------- Req'st Svc. Date: EXHIBIT A OFFICE USE ONLY ---------------- IXC CARRIER, INC. Accepted Earlier Activation: MARKET SERVICE ORDER (MSO) MSO# Y N ------------------- ------ ---------- -------------------------------- Ckt ID: ---------------------- PURCHASE ORDER FORM FOR CUSTOMER ORDER NO: ---------------------- Pursuant to the DIGITAL SERVICE AGREEMENT by and between IXC CARRIER, INC. As LESSOR and as LESSEE, ------------------------------------------------------------------------------------------ dated , 19 , LESSEE orders and LESSOR shall provide the following Digital Transmission Service: ------------ -- New Renew Qty Rate Term Miles --------------- -------------- Cancel Disconnect DS-3 --------------- -------------- ---------- --------- ---------- ---------------- Change Expedite Y N DS-1 --------------- ----- ------ ---------- --------- ---------- ---------------- On Net Off Net DS0 --------------- -------------- ---------- --------- ---------- ---------------- Protocol Reconfigure CIF --------------- -------------- ---------- --------- ---------- ---------------- Other Other ------------------------------------------ ---------- --------- ---------- ---------------- Customer Contact: Phone #: Fax # --------------------------------- ---------------------- ---------------------- Technical Contact: Phone #: Fax # --------------------------------- ---------------------- ---------------------- CITY LOCATION A: CITY LOCATION B: --------------------------------- -------------------------------------------- ------------------------------------------------------------------------------------------------------------------- Special Switched Special Switched ---------- ------------ ---------- ---------------- Bypass Y N Owner Bypass Y N Owner --- ---- ----------------- ---- ----- -------------------- LESSOR TO PROVIDE: CFA: Y N LESSOR TO PROVIDE: CFA: Y N ---- ----- ----- ------ LOA: Y N ASR: Y N LOA: Y N ASR: Y N ---- ---- ---- ----- ---- ---- ---- ------ CUSTOMER (LESSEE) TO PROVIDE: CUSTOMER (LESSEE) TO PROVIDE: LOA: Y N Coordinated Convert Y N LOA: Y N Coordinated Convert Y N ---- ---- --- --- --- --- ---- ------ CIF Arrangement Y N CIF Attach Y N CIF Arrangement Y N CIF Attach Y N --- --- --- --- --- --- ---- ------ Special Instructions ` Special Instructions ------------------------------ ------------------------------ MONTHLY LEASE RATE: NON RECURRING CHARGES: Monthly IXC Charge: $ Installation $ ASR: $ ---------------- ---------------- ----------------- Eqpt. Lease Charge: $ Installation $ Reconfig $ ---------------- ---------------- ----------------- Echo Canceller: $ Installation $ Expedite $ ---------------- ---------------- ----------------- CIF Racks: $ Installation $ ---------------- ---------------- CIF Power: $ Installation $ ---------------- ---------------- Other: $ Installation $ ---------------- ---------------- TOTAL: $ TOTAL OF NON RECURRING CHARGES: $ ---------------- ----------------- Notwithstanding anything in the Digital Service Agreement to the contrary, (1) a security interest in this Agreement may be granted by Lessor to any Lender and (2) Lessor may from time to time assign all its rights and obligations hereunder with respect to any Circuits to any Affiliate. Upon such assignment herein this Agreement shall be deemed to be multiple agreements, each upon the terms and conditions set forth herein by and between Lessee and such affiliate with respect to such circuit between Lessor and Lessee with respect to the circuit not so assigned. IN WITNESS WHEREOF, the parties have executed this PURCHASE ORDER on the day of 19 ----- --------- -- ------------------------------------------------ ------------------------------------------------------------------ LESSOR APPROVAL/TITLE LESSEE AUTHORIZED REPRESENTATIVE/TITLE (Service Provider) (Customer) PLEASE FAX THIS DOCUMENT TO CUSTOMER SERVICE FAX # (512) 328-7810 ---------------------------------------------------------------------------------------------------------------------- For Office Use Only Version 2.0 4/11/95 ---------------------------------------------------------------------------------------------------------------------- <PAGE> CUSTOMER MAINTENANCE SUPPORT IXC Communications, Inc.'s (hereinafter referred to as IXC) standard fees for customer maintenance support services are as follows (unless set by precedence in a service contract): Maintenance services shall be defined as all work performed by IXC on equipment provided by or on behalf of the Customer, or supervision of the Customer's work within IXC's terminate facilities. Maintenance Service charges are not billed for troubles found within that portion of a circuit provided by IXC. The following billing rates apply for these services: A. * per hour (4 hour minimum - if dispatch is required) Monday through Friday during the business hours of 8:00 a.m. - 5:00 p.m. local time, exclusive of the following holidays: New Years Day President's Day Memorial Day Independence Day Labor Day Thanksgiving Day and the day after Thanksgiving Christmas Day B. * per hour (4 hour minimum) for overtime work done after business hours (defined above) and/or on holidays (defined above) and/or all day on Saturdays and Sundays. C. As requests for maintenance services are typically made via telephone, IXC must be advised, in writing as to the person(s) who are authorized to request service. It is the Customer's responsibility to keep IXC apprised of any changes to its list of representative(s). D. To request technical assistance and help under the maintenance services, a call must be made to our Network Control Center at 1-800-526-2488. This number should be used for IXC technical assistance, troubleshooting or testing of circuits, not for service impairment or outages. The person calling in must be on the authorized list in order to commit for charges for this technical assistance. If that person is not on the list, the request cannot be accommodated. 1. The Network Control Center personnel will take the call, record the caller's name and phone number along with facts concerning the assistance and support needed. The caller will then be given the number of the "Assistance Ticket." Page 1 of 3 * CONFIDENTIAL TREATMENT REQUESTED <PAGE> 2. Upon completion of work, this "Assistance Ticket" will be given to IXC's Accounting Department, and the customer will subsequently be billed based upon the information on that ticket. A copy will be attached to the invoice. E. Except for emergencies, IXC technicians cannot be dispatched unless requests are made in accordance with the above call-out procedure. Page 2 of 3 <PAGE> EXHIBIT E DIAMONDNET DS3 CIRCUITS Rate Section --------------------------------------------------------------------------------------------- V&H Banded City A City B Availability Miles $250k Rate Monthly Installation ----------------------------------------------------------------------------------------------------- P St. Louis Kansas City Normal 208 * * $2,000 H Chicago Detroit Normal 207 * * $2,000 A Detroit Pittsburgh Normal 206 * * $2,000 S Pittsburgh New York Normal 318 * * $2,000 E New York Philadelphia Normal 34 * * $2,000 Philadelphia Washington, DC Normal 124 * * $2,000 1 Washington, DC Atlanta Normal 541 * * $2,000 Atlanta Houston Normal 702 * * $2,000 Houston Austin Normal 144 * * $2,000 Dallas Phoenix 12/31/96 Note** 888 * * $2,000 Phoenix Los Angeles 2/28/97 Note** 359 * * $2,000 Total * Rate Section Billing Summary ----------------------------------------------------------------------------------------------------- Month Month 7 City A City B Month 1 Month 2 Month 3 Month 4 Month 5 6 thru 65 ------------------------------------------------------------------------------------------------------------- P St. Louis Kansas City H Chicago Detroit A Detroit Pittsburgh S Pittsburgh New York E New York Philadelphia Philadelphia Washington, DC 1 Washington, DC Atlanta Atlanta Houston Houston Austin Dallas Phoenix Phoenix Los Angeles Total * * * * * * * Note: Above rates under Phase 1 offer are provided with the following terms and conditions. o Total contract term of 65 months for each circuit provided. ------------------------------------------- o Billing during the first five months is *. Five Months of Billing * o Billing from 5th month forward is Monthly recurring plus monthly 60 Months Amortize * amortized amount of first five months. ------------------------------------------- o All circuits of Phase 1 must be ordered as a package. o Normal Availability is approximately 30 days after receipt of firm order. ** If the availability of the Dallas-Phoenix or the Phoenix-Los Angeles circuit is unsatisfactory, they can be deleted from this Phase without penalty. ----------------------------------------------------------------------------------------------------------------------------------- P Los Angeles Santa Clara Normal 313 * * $2,000 H Santa Clara San Francisco Normal 38 * * $2,000 A San Francisco Salt Lake Normal 598 * * $2,000 S Salt Lake Denver Normal 370 * * $2,000 E Denver Kansas City Normal 558 * * $2,000 Atlanta Miami Normal 600 * * $2,000 2 Chicago New York Normal 712 * * $2,000 Total * --------------------------------------- P Los Angeles Santa Clara H Santa Clara San Francisco A San Francisco Salt Lake S Salt Lake Denver E Denver Kansas City Atlanta Miami 2 Chicago New York Total * * * * * * * Note: Above rates under Phase 2 offer are provided with the following terms and conditions: o Total contract term of 81 months for each circuit provided. ---------------------- o All circuits of Phase 2 must be ordered as a package. One Month of Billing * o All circuits of Phase 1 must be ordered to quantity for Phase 2 circuits. 60 Months Amortize * o Billing during first month is *. ---------------------- o Billing from 2nd month forward is Monthly recurring plus amortized amount of first month. o Normal Availability is approximately 30 days after receipt of firm order. ----------------------------------------------------------------------------------------------------------------------------------- * CONFIDENTIAL TREATMENT REQUESTED Page 3 of 3 <PAGE> EXHIBIT D List of Rates for Service ------------------------- DS-0 Service * DS-1 Service * DS-3 Service Term Miles Rate per DS-0 Mile ---- ----- ------------------ ON-NET 0 - 250 * PHASE 1 65 months 251 - 500 * OFF-NET 501 - 1,000 * PHASE 2 61 months 1,000+ * * CONFIDENTIAL TREATMENT REQUESTED <PAGE> INSTALLED DS-0 CITIES OCTOBER, 1996 ARIZONA NPA/NNX TEXAS NPA/NNX Phoenix 602-279 Austin 512-389 Corpus Christi 512-883 CALIFORNIA Dallas 214-741 Los Angeles 213-622 El Paso 915-533 San Diego 619-419 Fort Worth 817-777 Stockton 209-463 Harlingen 210-425 Houston 713-224 DISTRICT OF COLUMBIA San Antonio 210-222 Washington, DC 202-245 McAllen 210-632 ILLINOIS VIRGINIA Chicago 312-861 Norfolk 804-622 MARYLAND TOTAL DS-0 CITIES 26 Baltimore 410-752 All cities are equipped for DSO services. MICHIGAN Birmingham 313-435 Additional cities will be added if cost is justified. MISSOURI Kansas City 816-221 St. Louis 314-231 NEW MEXICO Albuquerque 505-247 NEW YORK New York City 212-285 OHIO Dayton 513-252 OKLAHOMA Oklahoma City 405-232 Tulsa 918-582 PENNSYLVANIA Philadelphia 215-988 <PAGE> EXHIBIT C ON-NET DS-1 AND DS-3 CITIES ARIZONA DISTRICT OF COLUMBIA Flint Phoenix LATA 666 Washington, D.C. LATA 236 2001 S. Grand Traverse Phelps-Dodge Twr, Ste 1702 1828 L Street, N.W., Ste 260 (313)767 2600 N. Central (602)279 (202)833 Grand Rapids Tucson LATA 668 ILLINOIS 209 Graham, S.W. Arizona Bank Bldg. Chicago LATA 358 (616)235 33 N. Stone, Suite 1610 Prudential Building (520)792 130 E. Randolph, Suite 4001 Jackson (312)861 170 W. North Street CALIFORNIA (517)783 Bakersfield LATA 734 INDIANA 1430 Truxton Ave., Ste 730 Indianapolis LATA 336 Kalamazoo (805)327 Merchants Bank Bldg. 303 Mills St. 11 S. Meridian (616)385 Fresno LATA 728 Suite 1798/1799 4605 E. Vine (317)637 Lansing (209)486 230 South St. Southbend LATA 332 (517)482 Fresno Ter 211 West Washington St. Guarantee Savings 19th Floor Midland B1171 Fulton Mall, Ste. 1201 (219)233 1000 Jefferson (209)268 (517)631 MARYLAND Los Angeles LATA 730 Baltimore LATA 238 Pontiac One Wilshire 1220 S. Howard 324 S. Saginaw 624 S. Grand, Suite 1615 (301)752 (313)338 (213)689 MICHIGAN Royal Oak San Diego LATA 732 Ann Arbor 3100 W. 14 Mile Rd. 8933 Complex Dr. 1615 Plymouth Rd. (313)435 (619)569 (313)994 Saginaw San Francisco LATA 722 Battle Creek 315 Meredith Metropolitan Life Bldg. 175 Main Street (517)771 425 Market St, Ste 3800C (616)962 (415)543 MISSOURI Bay City Kansas City LATA 524 Sunnyvale LATA 722 100 E. Hart Bank of Kansas City 111 Uranium (517)667 1125 Grand Ave., Suite 1704 (408)739 (816) 283 Detroit LATA 340 COLORADO Book Bldg. Suite 2609 St. Louis LATA 520 Colorado Springs LATA 658 1249 Washington Blvd. 900 Walnut, Suite 220 102 S. Tejon, Suite 780 (313)961 (314)231 (719)471 Detroit NEVADA **Denver LATA 656 1860 Gratiot Ave. **Las Vegas LATA 821 Bell Building (313)259 Centel Bldg, Ste 400 931 14th Street, Ste. 622 125 S Las Vegas Blvd. (303)572 (702)388 <PAGE> NEW JERSEY Tulsa LATA 538 Harlingen LATA 568 Newark LATA 224 Lookout Mountain 513 E. Jackson 744 Broad Street, 3rd Floor 3500 S. 26th West Avenue Matz Building (201)824 (918)584 (210)425 (918)446 NEW MEXICO Houston LATA 560 Albuquerque LATA 664 PENNSYLVANIA 293 N. Main Street 200 Lomas Blvd, N.W. Philadelphia LATA 228 (713)224 13th Floor 2401 Locust St., 2nd Floor (505)247 (215)564 Lubbock LATA 544 1220 Broadway, #1901 NEW YORK Pittsburgh LATA 234 (806)762 New York LATA 132 Oliver Building 60 Hudson St., Ste 206 535 Smithfield St., Ste 2650 McAllen LATA 568 (212)285 (412)281 200 S. 10th Street, Suite 704 (210)687 OHIO TEXAS Akron LATA 325 Abilene LATA 550 Midland LATA 542 1 Cascade Plaza, Ste 1950 1049 N. Third, Suite 500 KMID-TV Studio Main & Bowery (915)675 La Force Blvd & (216)535 Air Terminal Amarillo LATA 546 (915)561 Cincinnati LATA 922 Amarillo Petroleum Bldg. 2300 Carew Tower 203 W. 8th, Suite 607/608 San Angelo LATA 961 Suite 4701 (806)373 36 E. Twohig, 15th Floor 441 Vine St. (513)651 (915)653 Austin LATA 558 Cleveland LATA 320 621 Pleasant Valley Road San Antonio LATA 566 R.F. Keith Bldg., Suite 2117 (512)389 660 S. Santa Rosa 1621 Euclid Ave. (210)225 (216)771 Corpus Christi LATA 564 606 N. Carancahua, Ste 816 Waco LATA 556 Columbus LATA 324 Wilson Plaza 100 S. 26th Street Borden Bldg., Level 2B (512)882 (817)750 180 E. Broad St. 614(469) Dallas LATA 552 **Priced on an Individual Case Basis (ICB) Tower of the Americas Dayton LATA 328 2323 Bryan, Suite 380 1 National Bank Bldg. Suite 2220 2223 Houston St. 130 W. Second (513)461 (214)954 (214)969 Toledo LATA 326 El Paso LATA 540 319 Madison Ave., Ste 2901 El Paso National (419)242 Bank Bldg. 201 E. Main, Suite 1702 OKLAHOMA (915)533 Oklahoma City LATA 536 Liberty Tower Fort Worth LATA 552 100 N. Broadway, Ste 3020 WT Waggoner Blvd. (405)232 810 Houston, Suite 1705 (817)870 <PAGE> ANCILLARY PRICING SCHEDULE FOR ON-NET SERVICE NON-RECURRING CHARGES DS-1 DS-3 --------------------- ---- ---- New Order Installation (On-Net) * * New Order Installation (Off-Net) * * DS-1 Ramp-Up per DS-O * * Order Change (less than 5 business days) * * Order Cancellation (less than 5 business days) * * ASR (new or disconnect) (Special Access Only) * * ASR Supplement * * Order Expedite * * Reconfiguration Same as install Same as install MONTHLY RECURRING CHARGES DS-1 DS-3 ------------------------- ---- ---- Monthly circuit charge (IXC portion) * * Cross-connect charge * * Other Interexchange Carrier to Lessor local access or bypass facility (Lessor long haul not involved) Local bypass charge * * Lessor POP to Lessor POP in same city, with no Lessor long haul attached at either Lessor POP. MISCELLANEOUS RECURRING NON-RECURRING ------------- --------- ------------- M13 1 yr Term * * 2+yr Term * * 3+yr Term * * ECHO CANCELLER (per circuit end) * * SECOND END LOOP (Ex: for ADPCM) * * DEMAND MAINTENANCE * /hr 8a.m.-5p.m. M-F, 4 hour minimum if dispatch is required; * /hr after hours with 4 hour minimum RACK SPACE * - subject to availability SHELF SPACE * /ea/mo ICB install DC POWER * /amp/mo (5 amp minimum; 5 amp increments) CIF AC/DC POWER * ALL OTHER SERVICES See Note (2) (1) All of the above charges are subject to change with a 30-day notice. (2) Services not described above will be considered special handling and charges will be assessed on an individual basis. * CONFIDENTIAL TREATMENT REQUESTED

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