<PAGE>

                         WORLDCOM NETWORK SERVICES, INC

                    CLASSIC/TRANSCEND -TM- SWITCHED SERVICES

                                 AMENDMENT NO. 1

         This Amendment No. 1 is made this 30 day of November, 1998, by and
between Logix Communications Corporation ("CUSTOMER") and WorldCom Network
Services, Inc. ("WORLDCOM"), to those certain Program Enrollment Terms (the
"PET") to that certain CLASSIC/TRANSCEND -TM- Telecommunications Services
Agreement and more particularly described as TSA#LCC-980601 (the "TSA") made
by and between Customer and WorldCom dated June, 1998. The parties agree that
as of December 1, 1998, the Service Schedule attached to the TSA will be
canceled in its entirety and superseded by the Service Schedule (the "AMENDED
AND RESTATED SERVICE SCHEDULE") attached hereto. In the event of any conflict
between the terms of the TSA or the PET and the terms of this Amendment No.
1, the terms of this Amendment No. 1 shall control. The TSA along with the
PET, the Amended and Restated Service Schedule, the Amended and Restated Rate
and Discount Schedule described herein and this Amendment No. 1 shall
collectively be referred to as the "AGREEMENT".

         The parties agree for good and valuable consideration, intending
legally to be bound, as follows:

A.       SERVICE TERM. The parties agree to substitute Section 1 of the
         PET to read in its entirety as follows:

         1.       SERVICE TERM:

                  (A) This Agreement shall commence as of June 25, 1998 (the
                  "EFFECTIVE DATE"), and shall continue through and include
                  December 31, 2001 (the "SERVICE TERM"). Upon expiration of the
                  Service Term, the Switched Services in question will continue
                  to be provided pursuant to the same terms and conditions as
                  are then in effect (including without limitation, the
                  applicable rates, discounts and commitments, if any), subject
                  to termination by either party upon thirty (30) days prior
                  written notice to the other party.

                  (B) At any time during the Service Term, WorldCom agrees that
                  Customer may elect to transition such Services being provided
                  hereunder to other products and services then being offered,
                  provided, Customer's commitments (whether revenue, minute or
                  otherwise), if any, are transferred and applied in full under
                  any new products or services.

B.       SPECIAL RATE. The parties agree to substitute Section 5 of the PET to
         read in its entirety as follows:

         5. SPECIAL RATE: Notwithstanding anything to the contrary contained in
         the Amended and Restated Rate and Discount Schedule attached hereto,
         commencing with the

                                       Page 1 of 2
                                       CONFIDENTIAL

<PAGE>

         Effective Date and continuing through the end of the Service Term,
         Customer will receive the special rate (the "SPECIAL RATE") shown
         below. The Special Rate will not be subject to the discount percentage
         set forth in the Amended and Restated Rate and Discount Schedule. All
         other rates will be as set forth in the Amended and Restated Rate and
         Discount Schedule.

         SWITCHED ACCESS Service (1+ and TOLL FREE) - Customer's Intrastate rate
         for 1+ and TOLL FREE calls within the State of Texas will be $0.1175.

C.       DISCOUNT SCHEDULE/APPLICATION OF DISCOUNTS/RATES. Commencing with
         Customer's December, 1998 billing period (i.e., January, 1999 invoice),
         be parties agree to delete the Rate and Discount Schedule attached to
         the TSA in its entirety and replace said Schedule with the Amended and
         Restated Rate and Discount Schedule attached hereto.

D.       OTHER TERMS AND CONDITIONS. Except as specifically amended or modified
         herein, the terms and conditions of the TSA and the PET will remain in
         full force and effect throughout the Service Term and any extensions
         thereof.

         IN WITNESS WHEREOF the parties have entered into this Amendment No. 1
on the date first written above.

WORLDCOM NETWORK SERVICES, INC.         LOGIX COMMUNICATIONS CORPORATION

By:  /s/  Jim Foran                     By:  /s/  Thomas S. Orem
   ---------------------------             ---------------------------

Print Name:  JIM FORAN                  Print Name:  THOMAS S. OREM

Title:  REGIONAL SALES DIRECTOR         Title:  V.P. OPERATIONS FINANCE
     --------------------------               --------------------------

                                      Page 2 of 2
                                      CONFIDENTIAL


<PAGE>

                         WORLDCOM NETWORK SERVICES, INC.

                            CLASSIC SWITCHED SERVICES

                              AMENDED AND RESTATED
                           RATE AND DISCOUNT SCHEDULE

         This AMENDED AND RESTATED RATE AND DISCOUNT SCHEDULE is made by and
between WorldCom Network Services, Inc. ("WORLDCOM") and Logix Communications
Corporation ("CUSTOMER") and is a part of their Telecommunications Services
Agreement for Switched Services. Capitalized terms not defined herein shall have
the meaning ascribed to them in the TSA, the PET or the Service Schedule. NOTE:
ANY MODIFICATIONS, ADDITIONS OR DELETIONS FROM THIS AMENDED AND RESTATED RATE
AND DISCOUNT SCHEDULE WILL NOT BE EFFECTIVE UNLESS SPECIFICALLY SET FORTH IN THE
PET.

                                                     I. RATES

(A)      TERMINATION SERVICE
<TABLE>
<CAPTION>

--------------------------------------------------------------------------------------
            JURISDICTION                                       RATE PER MINUTE
--------------------------------------------------------------------------------------
<S>                                                        <C>
INTERSTATE
-  Within the 48 contiguous United                          $0.0450 Day/Nonday
   States (excluding termination to
   SUPERSAVER and PREMIUM LATAs)
-  Within the 48 contiguous United                          $0.0375 Day/Nonday
   States (termination to SUPERSAVER
   LATAs on Schedule 1A)
-  Within the 48 contiguous United                          $0.0350 Day/Nonday
   States (termination to PREMIUM
   LATAs on Schedule 1B)
--------------------------------------------------------------------------------------
INTERSTATE Extended

- 48 contiguous United States to Hawaii                     $0.1108 Day/$0.0887 Nonday
- 48 contiguous United States to Alaska,                    $0.1120 Day/$0.0950 Nonday
  Puerto Rico and US Virgin Islands
--------------------------------------------------------------------------------------
INTRASTATE*                                                 SEE Schedule 2 (DEDICATED
                                                            ACCESS Service Rates)
--------------------------------------------------------------------------------------
INTERNATIONAL*
- 48 contiguous United States to                            SEE Schedule 5#
  International locations
  (excluding Canada and Mexico)
- 48 contiguous United States to                            SEE Schedule 3
  Canada
- 48 contiguous United States to Mexico                     SEE Schedule 3
--------------------------------------------------------------------------------------
</TABLE>

*        NOT SUBJECT TO DISCOUNT.
#        Based on Customer's Minimum Revenue Commitment described in
         the PET rounded down to the nearest level.

(B)      TOLL FREE ORIGINATION Service

<TABLE>
<CAPTION>
--------------------------------------------------------------------------------------
            JURISDICTION                                          RATE PER MINUTE
--------------------------------------------------------------------------------------
<S>                                                        <C>
INTERSTATE
- Within the 48 contiguous United                           $0.0525 Day/Nonday
  States (excluding origination
  from SUPERSAVER and PREMIUM LATAs)
- Within the 48 contiguous United                           $0.0450 Day/Nonday
  States (origination
--------------------------------------------------------------------------------------
</TABLE>
                                       Page 1 of 5
                                       CONFIDENTIAL

<PAGE>

<TABLE>
--------------------------------------------------------------------------------------
<S>                                                       <C>
  from SUPERSAVER LATAs on Schedule 1A)
- Within the 48 contiguous United                           $0.0425 Day/Nonday
  States (origination from PREMIUM
  LATAs on Schedule 13)
--------------------------------------------------------------------------------------
INTERSTATE Extended
- Hawaii to 48 contiguous United                            $0.1279 Day/$0.1110 Nonday
  States
- Alaska to 48 contiguous United                            $0.2457 Day/$0.2379 Nonday
  States
- Puerto Rico to 48 contiguous                              $0.1500 Day/$0.1465 Nonday
  United States
- US Virgin Islands to 48                                   $0.1899 Day/$0.1821 Nonday
  contiguous United States
--------------------------------------------------------------------------------------
INTRASTATE*                                                 SEE Schedule 2 (DEDICATED
                                                            ACCESS Service Rates)
--------------------------------------------------------------------------------------
INTERNATIONAL*
- Canada to 48 contiguous United                            SEE Schedule 3 (DEDICATED
  States                                                    ACCESS Service Rates)
--------------------------------------------------------------------------------------
</TABLE>

*        NOT SUBJECT TO DISCOUNT.

(C)      SWITCHED ACCESS SERVICE
<TABLE>
<CAPTION>
--------------------------------------------------------------------------------------
               JURISDICTION                                   RATE PER MINUTE
--------------------------------------------------------------------------------------
<S>                                                        <C>
INTERSTATE (1+ and TOLL FREE)
- Within the 48 contiguous United States                    $0.0795 Day/Nonday
--------------------------------------------------------------------------------------
INTERSTATE (1+) Extended
- 48 contiguous United States to                            $0.1470 Day/$0.1219 Nonday
  Hawaii
- 48 contiguous United States to                            $0.1470 Day/$0.1300 Nonday
  Alaska, Puerto Rico and US Virgin Islands
- Hawaii to 48 contiguous United                            $0.1550 Day/$0.1470 Nonday
  States
- Hawaii to Alaska, Puerto Rico                             $0.1751 Day/$0.1581 Nonday
  and US Virgin Islands
--------------------------------------------------------------------------------------
INTERSTATE (TOLL FREE) Extended*
- Hawaii to 48 contiguous United                            $0.1550 Day/$0.1470 Nonday
  States
- Alaska to 48 contiguous United                            $0.2728 Day/$0.2851 Nonday
  States
- Puerto Rico to 48 contiguous                              $0.1830 Day/$0.1783 Nonday
  United States
- US Virgin Islands to 48                                   $0.2170 Day/$0.2093 Nonday
  contiguous United States
--------------------------------------------------------------------------------------
INTRASTATE (1+ and TOLL FREE)*                              SEE Schedule 2
--------------------------------------------------------------------------------------
INTERNATIONAL*
- 48 contiguous United States to                            SEE Schedule 4#
  International locations
  (excluding Canada and Mexico)
- 48 contiguous United States to                            SEE Schedule 3
  Canada
- 48 contiguous United States to                            SEE Schedule 3
  Mexico
- Hawaii to certain International                           SEE Schedule 7
  locations
- Hawaii to Canada                                          SEE Schedule 3
- Hawaii to Mexico                                          SEE Schedule 3
--------------------------------------------------------------------------------------
</TABLE>

*        NOT SUBJECT TO DISCOUNT.
#        Based on Customer's Minimum Revenue Commitment described in
         the PET rounded down to the nearest level.

(D)      DEDICATED ACCESS SERVICE

<TABLE>
<CAPTION>
--------------------------------------------------------------------------------------
               JURISDICTION                                      RATE PER MINUTE
--------------------------------------------------------------------------------------
<S>                                                         <C>
INTERSTATE (1+)
-  Within the 48 contiguous United                          $0.0500 Day/Nonday
   States (excluding termination to
   DEDICATED SUPERSAVER LATAs)
--------------------------------------------------------------------------------------
</TABLE>

                                          Page 2 of 5
                                          CONFIDENTIAL
<PAGE>
<TABLE>
---------------------------------------------------------------------------------------------
<S>                                                             <C>
- Within the 48 contiguous United States (termination            $0.0400 Day/Nonday
  to DEDICATED SUPERSAVER LATAs on Schedule 1C)
---------------------------------------------------------------------------------------------
INTERSTATE (TOLL FREE)
- Within the 48 contiguous United States (excluding              $.0525 Day/Nonday
  termination from DEDICATED SUPERSAVER LATAs)
- Within the 48 contiguous United States (termination            $.0475 Day/Nonday
  from DEDICATED SUPERSAVER LATAs on Schedule 1)
---------------------------------------------------------------------------------------------
INTERSTATE (1+) Extended
- 48 contiguous United States to Hawaii                          $0.1108 Day/$0.0887 Nonday
- 48 contiguous United States to Alaska, Puerto Rico             $0.1120 Day/$0.0950 Nonday
  and US Virgin Islands
---------------------------------------------------------------------------------------------
INTERSTATE (TOLL FREE) Extended*
- Hawaii to 48 contiguous United States                          $0.1279 Day/$0.1110 Nonday
- Alaska to 48 contiguous United States                          $0.2457 Day/$0.2379 Nonday
- Puerto Rico to 48 contiguous United States                     $0.1500 Day/$0.1465 Nonday
- US Virgin Islands to 48 contiguous United States               $0.1899 Day/$0.1821 Nonday
---------------------------------------------------------------------------------------------
INTRASTATE (1+ and TOLL FREE)*                                   SEE Schedule 2
---------------------------------------------------------------------------------------------
INTERNATIONAL*
- 48 contiguous United States to International locations         SEE Schedule 5#
  (excluding Canada and Mexico)
- 48 contiguous United States to Canada                          SEE Schedule 3
- 48 contiguous United States to Mexico                          SEE Schedule 3
---------------------------------------------------------------------------------------------
</TABLE>

*        NOT SUBJECT TO DISCOUNT.
#        BASED ON CUSTOMER'S MINIMUM REVENUE COMMITMENT DESCRIBED IN
         THE PET ROUNDED DOWN TO THE NEAREST LEVEL.

(E)      TRAVEL CARD SERVICE
<TABLE>
---------------------------------------------------------------------------------------------
                  JURISDICTION                                    RATE PER MINUTE
---------------------------------------------------------------------------------------------
<S>                                                              <C>
BASIC INTERSTATE
- Within the 48 contiguous United States                         $0.1200 Day/Nonday
---------------------------------------------------------------------------------------------
BASIC INTERSTATE Extended
- 48 contiguous United States to Alaska, Hawaii,                 $0.1450 Day/Nonday
  Puerto Rico and US Virgin Islands
- Hawaii to 48 contiguous United States                          $0.1550 Day/$0.1470 Nonday
- Alaska to 48 contiguous United States                          $0.2728 Day/$0.2651 Nonday
- Puerto Rico to 48 contiguous United States                     $0.1830 Day/$0.1783 Nonday
- US Virgin Islands to 48 contiguous United States               $0.2170 Day/$0.2093 Nonday
---------------------------------------------------------------------------------------------
BASIC INTRASTATE*                                                SEE Schedule 2 (SWITCHED
                                                                 ACCESS Service Rates)
---------------------------------------------------------------------------------------------
BASIC INTERNATIONAL *
- 48 contiguous United States to International locations         SEE Schedule 4# (SWITCHED
  (excluding Canada and Mexico)                                  ACCESS Service Rates)
- 48 contiguous United States to Canada                          $0.1300 Day/Nonday
- 48 contiguous United States to Mexico                          SEE Schedule 3 (SWITCHED
                                                                 ACCESS Service Rates)
- Canada to 48 contiguous United States                          $0.2450 Day/Nonday
---------------------------------------------------------------------------------------------
ENHANCED                                                         SEE Schedule 6
---------------------------------------------------------------------------------------------
</TABLE>
*        NOT SUBJECT TO DISCOUNT.

                                       Page 3 of 5
                                       CONFIDENTIAL
<PAGE>

#        BASED ON CUSTOMER'S MINIMUM REVENUE COMMITMENT DESCRIBED IN
         THE PET ROUNDED DOWN TO THE NEAREST LEVEL.

(F)      DIRECTORY ASSISTANCE

         (i)      Interstate Rate Per Call [NOT SUBJECT TO DISCOUNT]: $0.50.

         (ii)     Intrastate Rate Per Call [NOT SUBJECT TO DISCOUNT]: $0.60.

                                 II. DISCOUNTS

(A)      For purposes of this Agreement, Customer's "Monthly Revenue"
will be comprised of (i) Customer's gross measured and per call Switched Service
charges (i.e., Directory Assistance and both Domestic and International) which
shall include Customer's measured usage charges for International Toll Free
Service (ITFS) and Universal International Free Phone Number Service (UIFN) from
WorldCom (ii) the PICC Charge described in Section 16 of the Service Schedule
(if billed directly to WorldCom by the LEC) (iii) three (3) times Customer's
first $300,000 of Private Line Charges (as defined herein) from WorldCom, two
(2) times Customer's second $300,000 of Private Line Charges from WorldCom, and
Customer's Private Line Charges from WorldCom in excess of $600,000. For
purposes of this Subsection (A), Customer's "PRIVATE LINE CHARGES" will be
comprised of Customer's monthly recurring private line Interexchange Service
charges (i.e., both Domestic and International) PLUS Customer's Monthly Port
Charges, Monthly CIR Charges and Monthly NNI Charges, if any, as are
specifically described in an agreement for Frame Relay Services between WorldCom
and Customer. Customer's Monthly Revenue will include any Deficiency Charges
paid by Customer but will not include any pro rata charges, access charges,
ancillary or special feature charges, such as, Authorization codes or CDR Tapes,
or any other charges other than those identified by the relevant WorldCom
invoice as charges specifically mentioned in this Subsection (A).

(B) Commencing with the Effective Date and continuing through the end of the
Service Term (INCLUDING any applicable extensions thereto), Customer's discount
percentage (the "DISCOUNT") will be fifteen percent (15%).

                                 III. APPLICATION OF DISCOUNTS

(A) After determining Customer's applicable Discount percentage under Article II
above, the applicable percentage will be applied to Monthly Revenues comprised
of Customer's INTERSTATE (including Alaska, Hawaii, the United States Virgin
Islands and Puerto Rico UNLESS otherwise noted herein) measured usage charges
(which includes 1+ and Toll Free usage UNLESS otherwise noted herein).

(B) During the Service Term, accumulated credits derived from the applicable
Discount will be applied in arrears commencing with the first day of the month
following the Effective Date, that is, the Discount will be applied to
Customer's measured usage charges for the preceding month (the "DISCOUNT
PERIOD"). The initial Discount Period shall include any partial calendar month
following Start of Service, or such other time basis as may be mutually
determined by the parties.

                                        4 of 5
                                     CONFIDENTIAL
<PAGE>

(C) Each Discount will result in the application of a credit obtained during the
Discount Period to the WorldCom invoice to Customer relevant to the billed
measured Switched Service for the calendar month next following the completion
of each Discount Period, PROVIDED Customer has paid undisputed charges
(including any late fees, if applicable) for that month and has not otherwise
been subject to a Suspension Notice in accordance with the TSA. Failure of
Customer to comply with the foregoing provision shall entitle WorldCom to
withhold any credit due Customer for the Discount Period in question until such
charges (including late fees) have been paid in full.

         IN WITNESS WHEREOF, Customer has initialed this CLASSIC SWITCHED
SERVICES Amended and Restated Rate and Discount Schedule on the date first
written above.

LOGIX COMMUNICATIONS CORPORATION

Customer's Initials [ILLEGIBLE]
                    -----------
ATTACHMENTS:
<TABLE>
        <S>                        <C>
         Schedule 1A                SUPERSAVER LATAs
         Schedule 1B                PREMIUM LATAs
         Schedule 1C                DEDICATED SUPERSAVER LATAs
         Schedule 2                 Intrastate Rates
         Schedule 3                 Canada and Mexico Rates; Canada and Mexico
                                    Rates from Hawaii
         Schedule 4                 SWITCHED ACCESS Service International Rates
         Schedule 5                 DEDICATED ACCESS Service International Rates
         Schedule 6                 ENHANCED TRAVEL CARD Service Rates
         Schedule 7                 Switched International Rates 1 + from Hawaii
</TABLE>
                                        Page 5 of 5
                                       CONFIDENTIAL


<PAGE>

                         WORLDCOM NETWORK SERVICES, INC.

                      CLASSIC/TRANSCENDTM SWITCHED SERVICES

                              AMENDED AND RESTATED
                                SERVICE SCHEDULE

         THIS AMENDED AND RESTATED SERVICE SCHEDULE is made by and between
WorldCom Network Services, Inc. ("WORLDCOM") and Logix Communications
Corporation ("CUSTOMER") and is a part of their Telecommunication Services
Agreement for Switched Services. Neither Customer nor WorldCom shall be
obligated with respect to the Switched Services described below, nor any other
condition of such Switched Services until Customer has submitted and WorldCom
has accepted a Service Request with respect to the particular Switched Service.
Capitalized terms not defined herein shall have the meaning ascribed to them in
the TSA, the PET or the applicable Rate and Discount Schedule.

1. SWITCHED SERVICES: During the Service Term of the Agreement, WorldCom will
provide the following Switched Services (all as more particularly described
herein), (i) to and from the locations below, and (ii) for the charges and
applicable discounts set forth in the applicable Rate and Discount Schedule
attached herewith:

         (a)      "TERMINATION SERVICE" which is WorldCom's termination of calls
                  received from Customer's Service Interconnection(s).

         (b)      "TOLL FREE ORIGINATION Service" which is the origination of
                  Toll Free calls by WorldCom and the termination of such calls
                  to Customer's Service Interconnection(s).

         (c)      "SWITCHED ACCESS Service" which is the origination (via
                  individual telephone -access lines) and termination of calls
                  solely over facilities comprising the WorldCom network.

         (d)      "DEDICATED ACCESS Service" which is the origination and
                  termination of calls solely over facilities comprising the
                  World Com network which origination or termination is via
                  dedicated access lines.

         (e)      "TRAVEL CARD Service" which is the origination (via Travel
                  Card Toll Free number access) and termination of calls solely
                  over facilities comprising the WorldCom network.

2.       SERVICE INTERCONNECTIONS:

         (a) In order to utilize (i) TERMINATION Service and TOLL FREE
         ORIGINATION Service, one or more full time dedicated connections
         between Customer's network and the WorldCom network at one or more
         WorldCom designated locations ("WORLDCOM POP") must be established
         ("CARRIER SERVICE INTERCONNECTIONS"), and (ii) DEDICATED ACCESS
         Service, one or more full time dedicated connections between an End
         User's private branch exchange ("PBX") or other customer premise
         equipment and the World Com network at one or more World Com POP(s)
         must be established ("DEDICATED SERVICE INTERCONNECTIONS"). Each
         Carrier Service Interconnection and Dedicated Service Interconnection
         shall be comprised of


                                        Page 1 of 8
                                       CONFIDENTIAL
<PAGE>

         one or more dedicated access circuits, as the case may be. Carrier
         Service Interconnections and Dedicated Service Interconnections are
         collectively referred to as "SERVICE INTERCONNECTIONS".

         (b) The circuit(s) comprising each Service Interconnection to a
         WorldCom POP shall be requested by Customer on the appropriate WorldCom
         Service Request. Each Service Request will describe (among other
         things) the WorldCom POP to which a Service Interconnection is to be
         established, the Requested Service Date therefor, the type and quantity
         of circuits comprising the Service Interconnection and any charges and
         other information relevant thereto, such as, Customer's terminating or
         originating switch location, as the case may be. Such additional
         information may be obtained from Customer or gathered by WorldCom and
         recorded in Technical Information Sheets provided by WorldCom.

         (c) Once ordered, and unless otherwise provided for in this TSA,
         Service Interconnections or the circuits comprising each Service
         Interconnection may only be canceled by Customer upon not less than
         thirty (30) days prior written notice to WorldCom.

         (d) With respect to a Carrier Service interconnection, absent the
         automatic number identification ("ANI") of the calling party, Customer
         shall provide WorldCom with a written certification (the
         "Certification") of the percentage of interstate (including
         international) and intrastate minutes of use relevant to the minutes of
         traffic to be terminated in the same state in which the World Com POP
         is located to which the Carrier Service Interconnection is made. This
         Certification shall be provided by Customer prior to Start of Service
         for any Carrier Service Interconnection and may be modified from time
         to time by Customer and subject to recertification upon the request of
         World Com which requests shall not be made unilaterally by WorldCom
         more than once each calendar quarter. Any such modification(s) or
         Certification(s) shall be effective as of the first day of any calendar
         month and following at least forty-five (45) days notice from Customer.
         In the event Customer fails to make such Certification, the relevant
         minutes of use will be deemed to be subject to the Intrastate Rates
         described in the applicable Rate and Discount Schedule. In the event
         WorldCom or any other third party requires an audit of WorldCom's
         interstate/intrastate minutes of traffic, Customer agrees to cooperate
         in such audit at its expense and make its call detail records, billing
         systems and other necessary information reasonably available to World
         Com or any third party solely for the purpose of verifying Customer's
         interstate/intrastate minutes of traffic. Customer agrees to indemnify
         World Com for any liability World Com incurs in the event Customer's
         Certification is different than that determined by the audit.

         (e) With respect to Carrier Service Interconnections, Customer shall be
         solely responsible for establishing and maintaining each Carrier
         Service Interconnection over facilities subject to World Com's
         approval. With respect to Dedicated Service Interconnections, WorldCom
         will provision and maintain local access facilities between the End
         User location (i.e., PBX) and the WorldCom POP, subject to any LEC
         charges plus other applicable terms and charges set forth in World
         Com's F.C.C. Tariff No. 5, however, Customer may elect to be
         responsible for establishing each Dedicated Service Interconnection
         over facilities subject to WorldCom's approval. Service
         Interconnections shall only be comprised of D$1 facilities unless
         otherwise provided for in the Service Request and agreed to in writing
         by WorldCom. If a Service Interconnection is proposed to be made via a
         local exchange carder, WorldCom will have the authority to direct
         Customer to utilize WorldCom's entrance facilities or local serving
         arrangement ("LSA") with the relevant local telephone operating
         company, and Customer will be subject to a non-discriminatory charge
         therefor from World Com. The monthly recurring


                                       Page 2 of 8
                                      CONFIDENTIAL

<PAGE>

         charge relevant to Customer's use of LSA capacity shall be subject to
         upward adjustment by WorldCom from time to time which adjustment, if
         any, shall not exceed the rate that otherwise would be charged for the
         equivalent switched access capacity between the same points by the
         relevant local telephone operating company pursuant to its published
         charges for the type of service in question.

         (f) If other private line interexchange facilities are necessary to
         establish a Service Interconnection, and such facilities are requested
         from WorldCom, such facilities will be provided on an individual case
         basis.

         (g) Commencing with the second full calendar month following Start of
         Service for each circuit comprising a Service Interconnection (i.e.,
         both Carrier Service Interconnections and Dedicated Service
         Interconnections) and thereafter, Customer will maintain Switched
         Services measured usage charges per DS1 (or DS-1 equivalent circuit) of
         not less than an average of $1,500 per calendar month/billing period
         ("MINIMUM MONTHLY USAGE"). In the event Customer fails to obtain the
         required Minimum Monthly Usage for the circuits comprising each Service
         Interconnection, WorldCom will charge and Customer will pay the
         difference between the number of DS-1s times the Minimum Monthly Usage
         (i.e., $1,500) and Customer's total Switched Services measured usage
         charges for the circuit(s) comprising the Service Interconnection in
         question ("MINIMUM USAGE CHARGE"). WorldCom TERMINATION Service and
         TOLL FREE ORIGINATION Service minutes carried over the same Service
         Interconnection, if any, shall be included in determining if Customer
         has met the Minimum Monthly Usage requirement.

                  Example: Assume Customer's actual Switched Services measured
                  usage charges for 2 DS-1s comprising a Carrier Service
                  Interconnection at WorldCom POP A is $3,500, Customer's actual
                  Switched Services measured usage charges for 2 DS-1s
                  comprising a Carrier Service Interconnection at WorldCom POP B
                  is $4,500, and Customer's End User's actual Switched Services
                  measured usage charges for 1 DS-1 comprising a Dedicated
                  Service Interconnection at WorldCom POP C is $600. Customer
                  would not be subject to a Minimum Usage Charge since
                  Customer's actual Minimum Monthly Usage is $8,600 which
                  exceeds Customer's Minimum Monthly Usage of $7,500 [5 x
                  $1,500).

         (h) DS-1 circuits comprising all Service Interconnections will be
         subject to a nonrecurring $400 per DS-1 switch port installation
         charge, and DS-3 circuits comprising all Service Interconnections will
         be subject to a nonrecurring per DS-3 switch port installation charge
         as determined on an individual case basis.

3. FORECASTS: Before Customer's initial order for Switched Services, Customer
shall provide World Com with a forecast regarding the number of minutes expected
to be terminated or originated in various LATAs and/or Tandems, so as to enable
WorldCom to configure optimum network arrangements. In the event Customer's
Switched Service traffic volumes result in a lower than industry standard
completion rate or otherwise adversely affect the WorldCom Network, WorldCom
reserves the right to block the source of such adverse traffic at any time.
Customer will provide WorldCom with additional forecasts from time to time upon
World Com's request which shall not be more frequent than once every three (3)
months.
                                       Page 3 of 8
                                      CONFIDENTIAL

<PAGE>

4. START OF SERVICE: Start of Service for the various Switched Services will
occur as described below:

<TABLE>
<CAPTION>
         ----------------------------------------------------------------------------------
               SERVICE                                            START OF SERVICE
         ----------------------------------------------------------------------------------
         <S>                                        <C>
         TERMINATION Service                        Concurrently with the activation of
                                                    each circuit comprising Carrier
                                                    Service Interconnections relevant to
                                                    TERMINATION Service
         ----------------------------------------------------------------------------------
         TOLL FREE ORIGINATION Service              Concurrently with the activation of
                                                    each circuit comprising Carrier
                                                    Service Interconnections relevant to
                                                    TOLL FREE ORIGINATION Service
         ----------------------------------------------------------------------------------
         SWITCHED ACCESS Service                    ANI by ANI basis concurrently with the
                                                    activation of each ANI to be served,
                                                    and a TOLL FREE Number by TOLL FREE
                                                    Number basis concurrently with
                                                    activation of each TOLL FREE Number
         ----------------------------------------------------------------------------------
         DEDICATED ACCESS Service                   Concurrently with the activation of
                                                    each circuit comprising Dedicated
                                                    Service Interconnections
         ----------------------------------------------------------------------------------
         TRAVEL CARD Service                        Code by Code basis concurrently with
                                                    the activation of each Code
         ----------------------------------------------------------------------------------
</TABLE>

5.       LIMITATION OF ORIGINATION OR TERMINATION LOCATIONS
<TABLE>
<CAPTION>
         -------------------------------------------------------------------------------------------------------
         <S>                                     <C>                                    <C>
            SWITCHED SERVICE                        ORIGINATION FROM                         TERMINATION TO
         -------------------------------------------------------------------------------------------------------
         TERMINATION service                     Any Worldcom POP                       Any direct dialable
                                                                                        location worldwide
         -------------------------------------------------------------------------------------------------------
         TOLL FREE ORIGINATION Service           Locations in the 48 contiguous         Any customer
                                                 United States, Hawaii, Alaska, the     designated carrier
                                                 US Virgin Islands, Puerto Rico and     Service  Interconnection
                                                 Canada
         -------------------------------------------------------------------------------------------------------
         SWITCHED ACCESS (1+) Service            All equal access exchanges in the 48   Any direct dialable
                                                 contiguous United States  (except in   location worldwide
                                                 LATA 921-Fishers Island, New York)
                                                 and Hawaii
         -------------------------------------------------------------------------------------------------------
         SWITCHED ACCESS (Toll Free) Service     Locations in the 48 contiguous United  Locations in the 48
                                                 States, Hawaii, Alaska, the US         contiguous United
                                                 Virgin Islands, Puerto Rico            States and Hawaii
         -------------------------------------------------------------------------------------------------------
         DEDICATED ACCESS (1+) Service           Locations in the 48 contiguous         Any direct dialable
                                                 United States                          location worldwide
         -------------------------------------------------------------------------------------------------------
         DEDICATED ACCESS (Toll Free) Service    Locations in the 48 contiguous United  Any Customer designated
                                                 States, Hawaii, Alaska, the US         Dedicated Service
                                                 Virgin Islands, Puerto Rico            Interconnection
         -------------------------------------------------------------------------------------------------------
         BASIC TRAVEL CARD Service               Locations in the 48 contiguous United  Locations in the 48
                                                 States                                 contiguous United States,
                                                                                        Hawaii, Alaska, the US
                                                                                        Virgin Islands, Puerto
                                                                                        Rico and Canada
         -------------------------------------------------------------------------------------------------------
         BASIC TRAVEL CARD Services              Locations in Hawaii, Alaska, the       Locations in the 48
                                                 US Virgin Islands, Puerto Rico and     contiguous United
                                                 Canada                                 States
         -------------------------------------------------------------------------------------------------------
         BASIC TRAVEL CARD Service               Select International locations.        Locations in the 48
                                                                                        contiguous United States
         -------------------------------------------------------------------------------------------------------
         TRAVEL CARD Service - Enhanced          SEE Schedule 6 to the applicable Rate  SEE Schedule 6 to
         Features                                and Discount Schedule.                 the applicable Rate
                                                                                        and Discount Schedule.
         -------------------------------------------------------------------------------------------------------
</TABLE>

6.       BILLING INCREMENTS:

         (A) Classic Service - (i) all calls (excluding California IntraLATA and
         California intrastate calls and calls to International Locations,
         Canada and Mexico) will be billed in six (6) second increments and
         subject to a six (6) second minimum charge, (ii) California

                                           Page 4 of 8
                                          CONFIDENTIAL

<PAGE>

         IntraLATA and California intrastate calls will be billed in six (6)
         second increments and subject to an eighteen (18) second minimum, and
         (ii) calls to International Locations, Canada and Mexico will be billed
         in six (6) second increments and subject to a thirty (30) second
         minimum charge.

         (B) TRANSCEND-TM- Service - (i) all calls (excluding calls to
         International Locations, Canada and Mexico and calls from Canada) will
         be billed in six (6) second increments and subject to a six (6) second
         minimum charge, and (iii) calls to International Locations, Canada and
         Mexico and calls from Canada will be billed in six (6) second
         increments and subject to a thirty (30) second minimum charge.

         (C) All calls will be billed (i) utilizing Hardware Answer Supervision
         where available, and with respect to TOLL FREE Services, commencing
         with Customer's switch wink or answer back. If Customer is found to be
         non-compliant in passing back appropriate answer supervision, i.e.,
         answer back, WorldCom reserves the right to suspend TOLL FREE Service
         or deny requests by Customer for additional Service until appropriate
         compliance is established.

7.       CDR MEDIA: WorldCom will provide Call Detail Records (CDRs) for
WorldCom's Switched Services in machine readable form in one of several
magnetic tape formats (selected by Customer on Customer's Service Request)
("CDR MEDIA"). CDR Media provided under this Section (i) monthly is provided
at no charge, (ii) weekly is subject to a recurring monthly charge of $150,
and (iii) daily is subject to the applicable non-recurring Installation
Charge as described below (plus all leased-line and equipment costs necessary
to implement Daily CDR Media which will be determined on an individual case
basis depending on Customer's specific configuration).

<TABLE>
<CAPTION>
        --------------------------------------------------------------------------------------
                     TYPE                         Total Contract                Non-Recurring
                                                      Value                      Installation
                                                                                    Charge
        --------------------------------------------------------------------------------------
         <S>                                       <C>                              <C>
         Daily CDR Media-Customer                   < $1,000,000                     $1,000
         provided hardware and software             $ 1,000,000+                     $1,000
        --------------------------------------------------------------------------------------
         Daily CDR Media-PC Solution                < $1,000,000                     $5,000
                                                    $ 1,000,000+                     $2,500
        --------------------------------------------------------------------------------------
         Sub-Daily CDR Media-Customer               < $1,000,000                     $1,000
         provided hardware and software             $ 1,000,000+                     $1,000
        --------------------------------------------------------------------------------------
         Sub-Daily CDR Media-PC                     < $1,000,000                     $5,000
         Solution                                   $ 1,000,000+                     $2,500
        --------------------------------------------------------------------------------------
</TABLE>

8.       TOLL FREE NUMBERS:

         (a) TOLL FREE numbers will be issued to Customer (i.e., issuance
         equates to activation or reservation, whichever occurs first) on a
         random basis. Customer requests for specific numbers will be considered
         by WorldCom, and if provided, will be subject to additional charges as
         set forth below and WorldCom's then current reservation policy which
         shall also apply to any randomly selected and reserved TOLL FREE
         number. At any time preceding three (3) months from the scheduled
         expiration of the Service Term, Customer may only reserve TOLL FREE
         numbers in an amount equal to the greater of (i) 50, or (ii) fifteen
         percent (15%) of the total number of TOLL FREE numbers activated by
         WorldCom for Customer. Customer requests for TOLL FREE numbers
         inconsistent with the above stated conditions may be considered by
         World Com on an individual case basis. TOLL FREE numbers reserved for
         Customer will be activated upon Customer's request,


                                       Page 5 of 8
                                      CONFIDENTIAL

<PAGE>

         however, with respect to TRANSCENDS-TM- Service, WorldCom may charge
         Customer an SMS Storage fee for each TOLL FREE number.

         (b)  Customer Request for Specific Numbers - $25 per individual TOLL
         FREE number.

         (c)  Customer specifically agrees that regardless of the method in
         which a TOLL FREE number is reserved for or otherwise assigned to
         Customer, that Customer will not seek any remedy from WorldCom under
         a theory of detrimental reliance or otherwise that such TOLL FREE
         number(s) are found not to be available for Customer's use until such
         TOLL FREE number is put in service for the benefit of Customer, and
         that such TOLL FREE number(s) shall not be sold, bartered, brokered or
         otherwise released by Customer for a fee (TOLL FREE Number
         Trafficking"). Any attempt by Customer to engage in TOLL FREE Number
         Trafficking shall be grounds for reclamation by WorldCom for
         reassignment of the TOLL FREE number(s) reserved for or assigned to
         Customer.

9.        ENHANCED TOLL FREE SERVICES: The following TOLL FREE identification
services and routing options (collectively, "ENHANCED TOLL FREE SERVICES")
are available from WorldCom:

         IDENTIFICATION SERVICES:

         i.         Dialed Number Identification Service - identification of
                    specific TOLL FREE number dialed.

         ii.        Real-Time ANI - receipt of telephone number of calling
                    party.

         TOLL FREE ROUTING OPTIONS:

         i.         Message Referral - recording (up to six (6) months) that
                    informs callers that the TOLL FREE number has been
                    disconnected or refers callers to new number.

         ii.        Call Area Selection - selection or blockage of

                    locations from which TOLL FREE numbers can be received
                    (i.e., State, NPA, LATA or NXX level).

         iii.       Call Distributor Routing - distribution of TOLL FREE traffic
                    evenly over dedicated access lines in a trunk group (e.g.,
                    ascending, descending, most idle, least idle).

         iv.        Route Completion (Overflow) - overflow of TOLL FREE
                    dedicated access traffic only to up to five (5) pre- defined
                    alternate routing groups (e.g., dedicated access, WATs
                    access lines or switched access lines).

         v.         Geographic Routing - termination of calls to a single TOLL
                    FREE number from two or more originating routing groups to
                    different locations.

         vi.        Time-of-Day Routing - routing of calls to single TOLL FREE
                    number based on time of day (up to forty-eight (48) time
                    slots of 15-minute increments in a 24-hour period).

                                         Page 6 of 8
                                        CONFIDENTIAL
<PAGE>

         vii.       Day-of-Week Routing - routing of calls to single TOLL FREE
                    number based on each day of the week.

         viii.      Day-of-Year Routing - routing of calls to single TOLL FREE
                    number based on up to fifteen (15) customer- specified
                    holidays.

         ix.        Percent Allocation Routing - routing of calls for each
                    originating routing group to two (2) or more terminating
                    locations based on customer-specified percentage.

         Customer will receive the Identification Services described above at no
         charge. The minutes of use rates for TOLL FREE Routing Options
         described above (in addition to the TOLL FREE Routing Option Feature
         Charges described below) will be the same rates for SWITCHED ACCESS
         Service (TOLL FREE) and DEDICATED ACCESS Service (TOLL FREE), whichever
         is applicable, as described in the applicable Rate -band Discount
         Schedule excluding Route Completion (Overflow). If Customer selects
         Route Completion (Overflow) and Customer's traffic overflows from
         DEDICATED ACCESS Service (TOLL FREE) to SWITCHED ACCESS Service (TOLL
         FREE), Customer's minute of use rate will be the rate associated with
         SWITCHED ACCESS Service (TOLL FREE). The TOLL FREE Routing Option
         Feature Charges are as follows:

         INSTALLATION CHARGE: $50.00 PER feature; maximum of $250.00
         per TOLL FREE number.

         CHANGE ORDER CHARGE: $50.00 PER feature; maximum of $250.00
         per TOLL FREE number.

         MONTHLY RECURRING CHARGE: $25.00 PER feature; maximum of
         $150.00 per TOLL FREE number.

         EXPEDITE CHARGE: $500.00 (i.e., outside normal interval time
         of four (4) business days).

         Note: More than ten (10) points of termination for a single feature
         will be treated as two (2) features. Further, every additional ten (10)
         points of termination will be treated as a separate feature.

10.      RESPORG SERVICES: Responsible Organization Services (relevant to
TOLL FREE Numbers) if provided by WorldCom will be provided by WorldCom
pursuant to WorldCom's F.C.C. Tariff No. 5.

11.      AUTHORIZATION CODES FOR TRAVEL CARD SERVICE: WorldCom will supply
Customer with authorization codes ("Codes") containing nine (9) or fourteen
(14) digits for use with a corresponding TOLL FREE Service number for
origination and termination of TRAVEL CARD Service calls. The Codes may be
obtained by Customer in blocks of ten (10) not to exceed a total of 1000
Codes at any one time. WorldCom reserves the right to deny access to any Code
at any time.

12.      INBOUND PORTION OF TRAVEL CARD SERVICE CALL: The inbound service
portion of a TRAVEL CARD Service call (i.e., the TOLL FREE Service) must be
provided by WorldCom.

13.      ACCOUNTING CODES: For every billed telephone number (BTN) requested
by Customer, whether verified or non-verified, Customer shall pay a monthly
recurring charge of $15.

                                       Page 7 of 8
                                       CONFIDENTIAL
<PAGE>

14.      PAY PHONE SURCHARGE: In the event WorldCom is required to compensate
payphone service providers (PSPs) for tollfree or access code calls which
originate from payphones (including without limitation, any Order adopted by the
FCC) ("PAYPHONE SURCHARGE"), WorldCom will charge and Customer agrees to pay
WorldCom the amount of the Payphone Surcharge which is required to be paid by
WorldCom.

15.      RBOC TERMINATION/ORIGINATION: With respect to Classic Switched
Services, following Start of Service for TERMINATION SERVICE, TOLL FREE
ORIGINATION Service and/or DEDICATED ACCESS Service, Customer will maintain
at least 80% of the minutes of traffic (during any calendar month or pro rata
portion thereof) with respect to each of the above-mentioned ServiCes for
termination or origination in a Tandem owned and operated by a Regional Bell
Operating Company ("RBOC TERMINATIONS/ORIGINATIONS") and subject to such
RBOC's tariffed access charges. WorldCom shall have the right to apply a
$0.020 per minute surcharge to the number of minutes by which Non-RBOC
Terminations/Originations exceed 20% of total monthly minutes for each of the
following Services: TERMINATION Service, TOLL FREE ORIGINATION Service and
DEDICATED ACCESS Service.

16.      PRESUBSCRIBED INTEREXCHANGE CARRIER CHARGE (PICC): With respect to
Classic Switched Services, WorldCom will charge Customer for any LEC-assessed
presubscribed interexchange carrier charge ("PICC CHARGE") which PICC Charge
will be reasonably determined by WorldCom as of a date certain each month
(the"PICC CHARGE DETERMINATION DATE") but only if WorldCom is directly billed
by the LEC for such PICC Charge. Customer's PICC Charge will be determined as
of the PICC Charge Determination Date and will be based on the same criteria
for which WorldCom is assessed such charge by the LEC (e.g., number and type
of Customer's End Users (i.e., residential or business) as well as the type
of line associated with each such End User (i.e., single line, secondary line
or multi-line). This Section 16 will be deemed to include any other similar
additional charges assessed by a LEC after the date of this Agreement. (i.e.,
charges for which WorldCom is not currently being assessed).

         IN WITNESS WHEREOF, Customer has initialed this CLASSIC/TRANSCENDTM
SWITCHED SERVICES Amended and Restated Service Schedule on the date first
written above.

LOGIX COMMUNICATIONS CORPORATION

Customer's Initials [ILLEGIBLE]
                    -----------
                                      Page 8 of 8
                                      CONFIDENTIAL