TELE COMMUNICATIONS INC /CO/
SC 13D/A, 1998-11-03
TELEPHONE COMMUNICATIONS (NO RADIOTELEPHONE)
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<PAGE>
 
                      SECURITIES AND EXCHANGE COMMISSION
                            Washington, D.C.  20549
                        _______________________________

                                 SCHEDULE 13D
                                (RULE 13D-101)
   INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULE 13D-1(A)
            AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13D-2(A)
                              (Amendment No. 10)*
                           TELE-COMMUNICATIONS, INC.
                           -------------------------
                               (Name of Issuer)

(1)  Tele-Communications, Inc. Series A TCI Group Common Stock, par value $1.00
     per share.
(2)  Tele-Communications, Inc. Series A Liberty Media Group Common Stock, par
     value $1.00 per share.
(3)  Tele-Communications, Inc. Series A TCI Ventures Group Common Stock, par
     value $1.00 per share.
(4)  Tele-Communications, Inc. Series B TCI Group Common Stock, par value $1.00
     per share.
(5)  Tele-Communications, Inc. Series B Liberty Media Group Common Stock, par
     value $1.00 per share.
(6)  Tele-Communications, Inc. Series B TCI Ventures Group Common Stock, par
     value $1.00 per share.
(7)  Class B 6% Cumulative Redeemable Exchangeable Junior Preferred Stock, par
     value $.01 per share.
- --------------------------------------------------------------------------------
                       (Title of Classes of Securities)

(1)  Series A TCI Group Common Stock:                  87924V101
(2)  Series A Liberty Media Group Common Stock:        87924V507
(3)  Series A TCI Ventures Group Common Stock:         87924V887
(4)  Series B TCI Group Common Stock:                  87924V200
(5)  Series B Liberty Media Group Common Stock:        87924V606
(6)  Series B TCI Ventures Group Common Stock:         87924V879
(7)  Class B Preferred Stock:                          87924V309
- --------------------------------------------------------------------------------
                                (CUSIP Numbers)

                              Dr. John C. Malone
                         c/o Tele-Communications, Inc.
                    5619 DTC Parkway, Englewood, CO  80111
                                (303-267-5500)
                                --------------
                 (Name, Address and Telephone Number of Person
               Authorized to Receive Notices and Communications)

                               October 14, 1998
                               ----------------
            (Date of Event which Requires Filing of This Statement)

If the filing person has previously filed a statement on Schedule 13G to report
the acquisition which is the subject of this Schedule 13D, and is filing this
schedule because of Rule 13d-1(e), 13d-1(f) or 13d-1(g), check the following
box: [_]

NOTE:  Schedules filed in paper format shall include a signed original and five
copies of the schedule, including all exhibits.  See Rule 13d-7(b) for other
parties to whom copies are to be sent.

                        (Continued on following pages)
                             (Page 1 of 112 Pages)

_________________________________________
* The remainder of this cover page shall be filled out for a reporting person's
initial filing on this form with respect to the subject class of securities, and
for any subsequent amendment containing information which would alter
disclosures provided in a prior cover page.
<PAGE>
 
The information required on the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the Securities Exchange Act of
1934 ("Act") or otherwise subject to the liabilities of that section of the Act
but shall be subject to all other provisions of the Act (however, see the
Notes).


                         Exhibit Index is on Page 12


                              Page 2 of 112 Pages
<PAGE>
 
Cusip No. for Series A TCI Group Common Stock                87924V101
Cusip No. for Series A Liberty Media Group Common Stock      87924V507
Cusip No. for Series A TCI Ventures Group Common Stock       87924V887
Cusip No. for Series B TCI Group Common Stock                87924V200
Cusip No. for Series B Liberty Media Group Common Stock      87924V606
Cusip No. for Series B TCI Ventures Group Common Stock       87924V879
Cusip No. for Class B Preferred Stock                        87924V309
- --------------------------------------------------------------------------------

(1)  Names of Reporting Persons
     I.R.S. Identification Nos. of Above Persons (Entities Only)
 
     Dr. John C. Malone
- --------------------------------------------------------------------------------
(2)  Check the Appropriate Box if a Member of a Group 
     (a)  [_]
     (b)  [_]
- --------------------------------------------------------------------------------
(3)  SEC Use Only
- --------------------------------------------------------------------------------
(4)  Source of Funds

     BK
- --------------------------------------------------------------------------------
(5)  Check if Disclosure of Legal Proceedings is Required Pursuant
     to Items 2(d) or 2(e)    [_]
- --------------------------------------------------------------------------------
(6)  Citizenship or Place of Organization
     U.S.
- --------------------------------------------------------------------------------
Number of Shares Beneficially Owned by Each Reporting Person With

(7)  Sole Voting Power
     0 Shares

(8)  Shared Voting Power

     1,400,146      Shares of Series A TCI Group /1/
     54,449,228     Shares of Series B TCI Group /2, 3/
     1,137,807      Shares of Series A Liberty Group /2, 4/
     27,233,811     Shares of Series B Liberty Group /2, 5/
     1,200,000      Shares of Series A Ventures Group /6/
     45,039,888     Shares of Series B Ventures Group /2, 7/
     273,600        Shares of Class B Preferred /2/

(9)  Sole Dispositive Power
     0 Shares

(10) Shared Dispositive Power /8/

     1,400,146      Shares of Series A TCI Group /1/
     30,451,772     Shares of Series B TCI Group /2, 3/
     1,137,807      Shares of Series A Liberty Group /2, 4/
     12,941,092     Shares of Series B Liberty Group /2, 5/
     1,200,000      Shares of Series A Ventures Group /6/
     24,634,494     Shares of Series B Ventures Group /2, 7/
 
                              Page 3 of 112 Pages
<PAGE>
 
     273,600        Shares of Class B Preferred /2/

                              Page 4 of 112 Pages
<PAGE>
 
- --------------------------------------------------------------------------------
(11)  Aggregate Amount Beneficially Owned by Each Reporting Person

      1,400,146     Shares of Series A TCI Group /1/
      54,449,228    Series B TCI Group /2, 3/
      1,137,807     Shares of Series A Liberty Group /2, 4/
      27,233,811    Shares of Series B Liberty Group /2, 5/
      1,200,000     Shares of Series A Ventures Group /6/
      45,039,888    Shares of Series B Ventures Group /2, 7/
      273,600       Shares of Class B Preferred /2/
 
- --------------------------------------------------------------------------------
(12)  Check Box if the Aggregate Amount in Row (11) Excludes Certain Shares  [_]
- --------------------------------------------------------------------------------
(13)  Percent of Class Represented by Amount in Row (11) /9, 10/
 
Series A TCI Group            less than 1%
Series B TCI Group            84.5%
Series A Liberty Group        less than 1%
Series B Liberty Group        85.9%
Series A Ventures Group       less than 1%
Series B Ventures Group       93.6%
Class B Preferred             17.6%
- --------------------------------------------------------------------------------
(14) Type of Reporting Person
     IN

____________________
1.   Includes 1,400,000 shares Dr. Malone would acquire upon the exercise of
     stock options granted in tandem with stock appreciation rights of which
     options for 1,120,000 shares are currently exercisable, but does not
     include shares of Series A TCI Group Stock issuable upon conversion of
     shares of Series B TCI Group Stock owned by Dr. Malone or his spouse.

2.   Includes, as applicable, 784,892 shares of Series B TCI Group Stock, 12,726
     shares of Series A Liberty Group Stock, 439,875 shares of Series B Liberty
     Group Stock, 793,240 shares of Series B Ventures Group Stock, and 6,900
     shares of Class B Preferred Stock beneficially owned by Dr. Malone's
     spouse, as to which Dr. Malone disclaims any beneficial ownership thereof.

3.   Includes 17,157,952 shares of TCI Series B Stock pledged as security for
     the October 1998 Facility. Also includes 100,000 shares of Series B TCI
     Group Stock pledged as security for a separate loan. Also includes
     1,684,775 shares of Series B TCI Group Stock on which Dr. Malone has been
     granted the voting rights and 22,312,681 shares of Series B TCI Group 
     Stock on which Dr. Malone may exercise voting rights if the holders of such
     shares and Dr. Malone disagree on how the shares should be voted; however,
     Dr. Malone has no right to dispose of such shares (which are excluded in
     (10) above).

4.   Includes 1,125,000 shares of Series A Liberty Group Stock which Dr. Malone
     would acquire upon the exercise of stock options granted in tandem with
     stock appreciation rights of which options for 900,000 shares are currently
     exercisable.  These shares do not include shares of Series A Liberty Group
     Stock issuable upon conversion of shares of Series B Liberty Group Stock
     owned by Dr. Malone or his spouse.

5.   Includes 500,000 shares of Series B Liberty Group Stock pledged as security
     for a loan and 14,292,719 shares of Series B Liberty Group Stock on which
     Dr. Malone may exercise voting rights if the holders of such shares and Dr.
     Malone disagree on how the shares should be voted; however, Dr. Malone has
     no right to dispose of such shares (which are excluded in (10) above).

6.   Includes 1,200,000 shares of Series A Ventures Group Stock which Dr. Malone
     would acquire upon the exercise of stock options granted in tandem

                              Page 5 of 112 Pages
<PAGE>
 
     with stock appreciation rights of which options for 960,000 shares are
     currently exercisable, but does not include shares of Series A Ventures
     Group Stock issuable upon conversion of shares of Series B Ventures Group
     Stock owned by Dr. Malone or his spouse.

7.   Includes 1,721,360 shares of Series B Ventures Group Stock on which Dr.
     Malone has been granted voting rights and 18,684,034 shares of Series B
     Ventures Group Stock on which Dr. Malone may exercise voting rights if the
     holders of such shares and Dr. Malone disagree on how the shares should be
     voted; however, Dr. Malone has no right to dispose of such shares (which
     are excluded in (10) above).  Also, includes 2,800,000 shares which 
     Dr. Malone would acquire upon the exercise of stock options granted in
     tandem with stock appreciation rights of which none are currently
     exercisable.

8.   Subject to the Call Agreement.  (See Item 6 hereof.)

9.   Each share of Series B TCI Group Stock, Series B Liberty Group Stock and
     Series B Ventures Group Stock is entitled to 10 votes per share and each
     share of Series A TCI Group Stock, Series A Liberty Group Stock and Series
     A Ventures Group Stock is entitled to one vote per share.  In addition,
     holders of Class B Preferred Stock vote with the holders of the Series A
     TCI Group Stock, Series B TCI Group Stock, Series A Liberty Group Stock,
     Series B Liberty Group Stock, Series A Ventures Group Stock, Series B
     Ventures Group Stock, and certain classes/series of Issuer preferred stock
     on the election of directors. Accordingly, when these series and classes of
     stock are aggregated, the Reporting Person may be deemed to beneficially
     own voting equity securities representing approximately 48% of the voting
     power with respect to a general election of directors of the Issuer.

10.  The percentage ownership for the Series B TCI Group Stock only was
     calculated based upon the number of shares of such stock outstanding as of
     September 30, 1998, plus the 8,718,770 shares acquired by Dr. Malone and
     the 5,792,800 shares acquired by the Magness Group on October 14, 1998 and
     October 16, 1998, respectively, pursuant to the June Option.

                              Page 6 of 112 Pages
<PAGE>
 
                      SECURITIES AND EXCHANGE COMMISSION
                            Washington, D.C.  20549
                                 SCHEDULE 13D
                              (Amendment No. 10)

                                 Statement of

                              DR. JOHN C. MALONE
       Pursuant to Section 13(d) of the Securities Exchange Act of 1934
                                 in respect of

                           TELE-COMMUNICATIONS, INC.
                           -------------------------
                         (Commission File No. 0-20421)

ITEM 1.  Security and Issuer
         -------------------

     Dr. John C. Malone hereby amends and supplements his Statement on Schedule
13D, as amended to the date hereof (the "Statement"), with respect to the
following shares of stock of Tele-Communications, Inc., a Delaware corporation
(the "Issuer"), beneficially owned by Dr. Malone:

     (1)  Tele-Communications, Inc. Series A TCI Group Common Stock, par value
     $1.00 per share (the "Series A TCI Group Stock");

     (2)  Tele-Communications, Inc. Series A Liberty Media Group Common Stock,
     par value $1.00 per share (the "Series A Liberty Group Stock");

     (3)  Tele-Communications, Inc. Series A TCI Ventures Group Common Stock,
     par value $1.00 per share (the "Series A Ventures Group Stock");

     (4)  Tele-Communications, Inc. Series B TCI Group Common Stock, par value
     $1.00 per share (the "Series B TCI Group Stock");

     (5)  Tele-Communications, Inc. Series B Liberty Media Group Common Stock,
     par value $1.00 per share (the "Series B Liberty Group Stock");

     (6) Tele-Communications, Inc. Series B TCI Ventures Group Common Stock, par
     value $1.00 per share (the "Series B Ventures Group Stock"); and

     (7)  Class B 6% Cumulative Redeemable Exchangeable Junior Preferred Stock,
     par value $.01 per share (the "Class B Preferred Stock").

     The Issuer's executive offices are located at 5619 DTC Parkway, Englewood,
Colorado 80111.  Unless otherwise indicated, capitalized terms used but not
defined herein shall have the meanings assigned to such terms in the Statement.

     Dr. Malone is filing this Amendment No. 10 to the Statement to report (a)
his acquisition, on October 14, 1998, of 8,718,770 shares of Series B TCI Group
Stock in connection with his exercise of the right to purchase such shares
granted to him by Tele-Communications, Inc. pursuant to a Letter Agreement 
dated June 16, 1997 (the "June Option"), and (b) the release of certain shares
of Series B TCI Group Stock pledged as collateral for a loan. Dr. Malone's 
exercise of his right to purchase Series B TCI Group Stock was previously 
reported in Amendment No. 9 to his Statement on Schedule 13D.

                              Page 7 of 112 Pages
<PAGE>
 
ITEM 3.  Source and Amount of Funds or Other Consideration
         -------------------------------------------------

     Item 3 of the Statement is hereby amended and supplemented by adding the
following:

     Acquisition of Series B TCI Group Stock Pursuant to June Option
     ---------------------------------------------------------------

     On October 14, 1998, Dr. Malone purchased 8,718,770 shares of Series B TCI
Group Stock, at a purchase price of $35.5875 per share, in connection with the
exercise of his right to purchase such shares granted pursuant to the June
Option. Such shares represent the total number of shares available for purchase
by Dr. Malone pursuant to the June Option after giving effect to the
participation right granted to members of the Magness family in connection with
the settlement of the Administration of the Estate of Bob Magness. Dr. Malone
acquired the Series B TCI Group Stock with funds he borrowed pursuant to a
Revolving Credit Agreement, dated as of October 9, 1998, with NationsBank, N.A.,
as agent for the lenders thereof (the "October 1998 Facility"). Dr. Malone
established the October 1998 Facility for the acquisition of the Series B TCI
Group Stock and for other business purposes. The October 1998 Facility is
secured by 17,157,952 shares of Series B TCI Group Stock beneficially owned by
Dr. Malone as of October 9, 1998 (the "Pledged Shares"). Copies of the Pledge
Agreement, dated October 9, 1998 (the "October 1998 Pledge"), between John C.
Malone, as Pledgor, and NationsBank, N.A., as Agent (pursuant to which the
Pledged Shares are pledged), and the Revolving Credit Agreement, dated as of
October 9, 1998, among John C. Malone, NationsBank, N.A., as Agent, and the
Lenders named therein, are attached hereto as Exhibits 7(p) and 7(q),
respectively, and incorporated herein by this reference.

     Release of Collateral by Merrill, Lynch, Pierce, Fenner & Smith 
     ---------------------------------------------------------------
     Incorporated
     ------------
 
     As of October 7, 1998, all but 100,000 of the 2,795,000 shares of Series B
TCI Group Stock originally pledged to Merrill Lynch, Pierce, Fenner & Smith
Incorporated pursuant to a Pledge Agreement for Lending on Shelf-Registered,
Control or Restricted Securities, dated as of January 5, 1996 (the "Merrill
Lynch Pledge"), have been released. The 500,000 shares of Series B Liberty Group
Stock originally pledged pursuant to the Merrill Lynch Pledge remain subject
thereto.

ITEM 4.  Purpose of Transaction
         ----------------------

     Item 4 of the Statement is hereby amended and supplemented by adding the
following:

     AT&T Voting Agreement
     ---------------------
 
     In connection with the October 1998 Pledge, Dr. Malone, Leslie Malone and
AT&T Corp. executed an Amended and Restated Agreement (amending and restating
the Voting Agreement, dated as of June 23, 1998, among the parties), pursuant to
which AT&T Corp. consented to the October 1998 Pledge. A copy of the Amended and
Restated Agreement, attached hereto as Exhibit 7(r), is incorporated herein by
reference.

ITEM 5.  Interest in Securities of the Issuer
         ------------------------------------

     Item 5 (a) of the Statement is hereby amended and supplemented by adding
the following:

     Dr. Malone beneficially owns (without giving effect to the conversion of
Series B TCI Group Stock for Series A TCI Group Stock, of Series B Liberty Group
Stock for Series A Liberty Group Stock, or of Series B Ventures Group Stock for
Series A Ventures Group Stock): (a) 1,400,146 shares of Series A TCI Group
Stock, which includes options for 1,400,000 shares of which options for
1,120,000 shares are currently exercisable and represents less than 1% of the
outstanding shares of Series A TCI Group Stock; (b) 54,449,228 shares of Series
B TCI Group Stock, which includes Dr. Malone's right to direct the voting of
1,684,775 shares owned by the Trusts

                              Page 8 of 112 Pages
<PAGE>
 
and 22,312,681 shares owned by the Magness Group (see Item 6 below), and
represents 84.5% of the outstanding shares of Series B TCI Group Stock; (c)
1,137,807 shares of Series A Liberty Group Stock, which includes options for
1,125,000 shares of which options for 900,000 shares are currently exercisable
and represents less than 1% of the outstanding shares of Series A Liberty Group
Stock; (d) 27,233,811 shares of Series B Liberty Group Stock, which includes his
right to direct the voting of 14,292,719 shares owned by the Magness Group and
represents 85.9% of the outstanding shares of Series B Liberty Group Stock; (e)
1,200,000 shares of Series A Ventures Group Stock, which consists solely of
options for such shares of which options for 960,000 shares are currently
exercisable and represents less than 1% of the outstanding shares of Series A
Ventures Group Stock; and (f) 45,039,888 shares of Series B Ventures Group
Stock, which includes his right to direct the voting of 1,721,360 shares owned
by the Trusts and 18,684,034 shares owned by the Magness Group (see Item 6
below), and options for 2,800,000 shares of which none are currently exercisable
and represents 93.6% of the outstanding shares of Series B Ventures Group Stock.
In addition, Dr. Malone beneficially owns 273,600 shares of Class B Preferred
Stock, which represents 17.6% of the outstanding shares of Class B Preferred
Stock. The foregoing percentage interests are based on the outstanding share
numbers provided by the Issuer as of September 30, 1998 (adjusted for the
transactions disclosed in Item 5(c) below, and Dr. Malone's options as if
exercised in full), as follows: 473,416,687 (as adjusted, 474,816,687) shares of
Series A TCI Group Stock; 49,932,623 (as adjusted, 64,444,193) shares of Series
B TCI Group Stock; 325,507,126 (as adjusted 326,632,126) shares of Series A
Liberty Group Stock; 31,699,575 shares of Series B Liberty Group Stock;
377,065,516 (as adjusted, 378,265,516) shares of Series A Ventures Group Stock;
45,334,022 (as adjusted, 48,134,022) shares of Series B Ventures Group Stock;
and 1,552,490 shares of Class B Preferred Stock. When all series and classes of
stock beneficially owned by Dr. Malone are aggregated, Dr. Malone may be deemed
to beneficially own voting equity securities representing approximately 48% the
voting power with respect to a general election of directors of the Issuer.

     Item 5 (b) of the Statement is hereby amended and supplemented by adding
the following:

     Pursuant to the Amended and Restated Agreement, AT&T may be deemed to share
beneficial ownership of the Covered Shares (as defined therein) because AT&T has
the right to (i) require the Malone Parties to vote in favor of the Merger and
against certain other transactions and (ii) restrict the disposition of the
Covered Shares by the Malone parties. Such shared voting power extends to those
shares owned by the Magness Group that Dr. Malone has the power to vote in the
event that he and the members of the Magness Group are unable to agree upon how
such shares are to be voted. The restrictions on disposition of shares pursuant
to the Voting Agreement do not extend to those shares owned by members of the
Magness Group.

     Item 5 (c) of the Statement is hereby amended and supplemented by adding
the following:

     As previously described, on October 14, 1998 Dr. Malone acquired 8,718,770
shares of Series B TCI Group Stock, at a purchase price of $35.5875 per share,
in connection with his exercise of the right granted to him pursuant to the June
Option.

                              Page 9 of 112 Pages
<PAGE>
 
ITEM 6.  Contracts, Arrangements, Understandings or Relationships With Respect
         ---------------------------------------------------------------------
         to Securities of the Issuer
         ---------------------------

     In connection with the October 1998 Pledge, the Issuer executed a letter
waiving certain rights under the Call Agreement relating to the pledge of the
Pledged Shares (the "Call Waiver"). A copy of the Call Waiver is attached hereto
as Exhibit 7(s), and is incorporated herein by reference.

     Also in connection with the October 1998 Pledge, the Issuer and members of
the Magness Group executed a letter waiving certain rights arising in connection
with the pledge of the Pledged Shares (the "Stockholders' Waiver"). A copy of
the Stockholders' Waiver is attached hereto as Exhibit 7(t), and is incorporated
herein by reference.

     AT&T Corp. executed a consent under the Merger Agreement to the execution
of the Call Waiver and the Stockholders' Waiver (the "AT&T Consent Letter"). A
copy of the AT&T Consent Letter is attached hereto as Exhibit 7(u), and is
incorporated herein by reference.

     The information set forth in Items 3, 4 and 5 is hereby incorporated by
reference herein.

ITEM 7.  Material to be filed as Exhibits
         --------------------------------

     7(p) Revolving Credit Agreement, dated as of October 9, 1998, among John C.
Malone, as Borrower, NationsBank, N.A., as Agent, Societe Generale and Toronto
Dominion Securities (USA), Inc., as Co-Agents, and NationsBank, N.A., Society
Generale, and Toronto Dominion (Texas), Inc., as Lenders

     7(q) Pledge Agreement, dated as of October 9, 1998, between John C. Malone,
as Pledgor, and NationsBank, N.A., as Agent

     7(r) Amended and Restated Agreement, dated as of October 9, 1998, among
John C. Malone, Leslie Malone, and AT&T Corp.

     7(s) Waiver Letter with Respect to the Call Agreement, dated October 9,
1998, signed by Tele-Communications, Inc. and addressed to NationsBank, N.A., in
its capacity as Agent for the Lenders

     7(t) Waiver Letter with Respect to the Stockholders' Agreement, dated
October 9, 1998, signed by the Issuer and members of the Magness Group and
addressed to NationsBank, N.A., in its capacity as Agent for the Lenders

     7(u) AT&T Consent Letter, dated October 9, 1998

                             Page 10 of 112 Pages
<PAGE>
 
                                   SIGNATURE

     After reasonable inquiry and to the best of my knowledge and belief, I
certify that the information set forth in this Amendment No. 10 to the Statement
is true, complete and correct.


October 30, 1998                    /s/ John C. Malone
                                    ------------------------------------
                                    Dr. John C. Malone

                             Page 11 of 112 Pages
<PAGE>
 
                                 EXHIBIT INDEX


EXHIBIT NUMBER                      EXHIBIT                                 PAGE
- --------------                      -------                                 ----
     7(p)            Revolving Credit Agreement, dated as of October         13 
                     9, 1998, among John C. Malone, as borrower, 
                     NationsBank, N.A., as Agent, Societe Generale and 
                     Toronto Dominion Securities (USA), Inc., as 
                     Co-Agents, and NationsBank, N.A., Society Generale, 
                     and Toronto Dominion (Texas), Inc., as Lenders.

     7(q)            Pledge Agreement, dated as of October 9, 1998,          69
                     between John C. Malone, as Pledgor, and NationsBank, 
                     N.A., as Agent.

     7(r)            Amended and Restated Agreement, dated as of October     88
                     9, 1998, among John C. Malone, Leslie Malone, and 
                     AT&T Corp.

     7(s)            Waiver Letter with Respect to the Call Agreement,       99
                     dated October 9, 1998, signed by Tele-Communications, 
                     Inc. and addressed to NationsBank, N.A., in its 
                     capacity as Agent for the Lenders.

     7(t)            Waiver Letter with Respect to the Stockholders'        105
                     Agreement, dated October 9, 1998, signed by the 
                     Issuer and members of the Magness Group and addressed 
                     to NationsBank, N.A., in its capacity as Agent for 
                     the Lenders.

     7(u)            AT&T Consent Letter, dated October 9, 1998.            111


                             Page 12 of 112 Pages

<PAGE>
 
                                 EXHIBIT 7(p)
                                 
            REVOLVING CREDIT AGREEMENT, dated as of October 9, 1998

                                     among

                                JOHN C. MALONE,
                                  as Borrower

                              NATIONSBANK, N.A.,
                                   as Agent,


                               SOCIETE GENERALE
                                      and
                   TORONTO DOMINION SECURITIES (USA), INC.,
                                 as Co-Agents,

                                      and

                              NATIONSBANK, N.A.,
                             SOCIETE GENERALE, and
                        TORONTO DOMINION (TEXAS), INC.,
                                  as Lenders


                             Page 13 of 112 Pages
<PAGE>
 
                               TABLE OF CONTENTS
<TABLE> 
<CAPTION> 
                                                                                                                Page
                                                                                                                ---- 
<S>                                                                                                             <C> 
SECTION 1 DEFINITIONS.........................................................................................     1
   1.1 Definitions............................................................................................     1
   1.2 Rules of Construction..................................................................................     7
SECTION 2 THE REVOLVING CREDIT FACILITY.......................................................................     7
   2.1 Commitment to Lend.....................................................................................     7
   2.2 Method of Borrowing....................................................................................     8
   2.3 Notes..................................................................................................     9
   2.4 Interest Rate..........................................................................................     9
   2.5 Special Provisions for Eurodollar Advances; Taxes......................................................    10
   2.6 Payments of the Note...................................................................................    11
   2.7 Fees...................................................................................................    12
   2.8 Termination of Commitment..............................................................................    12
   2.9 Sharing of Payments, Etc...............................................................................    12
   2.10 Set-off...............................................................................................    12
   2.11 Capital Adequacy......................................................................................    12
SECTION 3 COLLATERAL..........................................................................................    13
   3.1 Liens and Security Interests...........................................................................    13
SECTION 4 CONDITIONS PRECEDENT................................................................................    13
   4.1 Initial Advance........................................................................................    13
   4.2 All Advances...........................................................................................    13
SECTION 5 REPRESENTATIONS AND WARRANTIES......................................................................    13
   5.1 Taxes..................................................................................................    13
   5.2 Pledged Shares.........................................................................................    14
   5.3 Authority and Compliance...............................................................................    14
   5.4 Binding Agreement......................................................................................    14
   5.5 Litigation.............................................................................................    14
   5.6 (a) Related Agreements.................................................................................    14
   (b) No Conflicting Agreements..............................................................................    14
   (c) Conversion.............................................................................................    15
   5.7 Financial Statements...................................................................................    15
   5.8 Use of Proceeds; Margin Stock..........................................................................    15
   5.9 Representations and Warranties.........................................................................    15
   5.10 Acquired Stock........................................................................................    15
   5.11 Share Ownership.......................................................................................    15
   5.12 Survival of Representations and Warranties............................................................    16
SECTION 6 COVENANTS...........................................................................................    16
   6.1 Financial Statements...................................................................................    16
   6.2 Compliance.............................................................................................    16
   6.3 Adverse Conditions or Events...........................................................................    16
   6.4 Taxes and Other Obligations............................................................................    16
   6.5 Transfer of Assets.....................................................................................    16
   6.6 Liens..................................................................................................    17
   6.7 Other Covenants........................................................................................    17
   6.8 Indemnity by Borrower..................................................................................    17
   6.9 Removal of Legends.....................................................................................    17
   6.10 Amendment to TCI Charter..............................................................................    17
SECTION 7 EVENTS OF DEFAULT...................................................................................    17
   7.1 Events of Default......................................................................................    17 
</TABLE> 

Revolving Credit Agreement 

                             Page 14 of 112 Pages
<PAGE>
 
<TABLE> 
<S>                                                                                                               <C>  
   7.2 Remedies Upon Event of Default............................................................................  19
   7.3 Performance by Agent......................................................................................  19
   7.4 Conversion and Voting Provisions..........................................................................  19
SECTION 8 THE AGENT..............................................................................................  19
   8.1 The Agent.................................................................................................  19
   8.2 Expenses..................................................................................................  21
   8.3 Proportionate Absorption of Losses........................................................................  21
   8.4 Delegation of Duties; Reliance............................................................................  21
   8.5 Limitation of Agent's Liability...........................................................................  22
   8.6 Default...................................................................................................  23
   8.7 Collateral Matters........................................................................................  23
   8.8 Limitation of Liability...................................................................................  23
   8.9 Relationship of Lenders...................................................................................  24
   8.10 Benefits of Agreement....................................................................................  24
SECTION 9 MISCELLANEOUS..........................................................................................  24
   9.1 Accounting Reports........................................................................................  24
   9.2 Waiver....................................................................................................  24
   9.3 Payment of Expenses.......................................................................................  24
   9.4 Notices...................................................................................................  24
   9.5 Governing Law.............................................................................................  25
   9.6 Choice of Forum; Consent to Service of Process and Jurisdiction...........................................  25
   9.7 Invalid Provisions........................................................................................  25
   9.8 Maximum Interest Rate.....................................................................................  25
   9.9 Nonliability of Lenders...................................................................................  25
   9.10 Article 15.10(b).........................................................................................  25
   9.11 Successors and Assigns...................................................................................  26
   9.12 Entirety.................................................................................................  28
   9.13 Headings.................................................................................................  28
   9.14 Survival.................................................................................................  28
   9.15 Amendments, Etc..........................................................................................  28
   9.16 No Third Party Beneficiary...............................................................................  28
   9.17 WAIVER OF JURY TRIAL.....................................................................................  29
   9.18 Multiple Counterparts....................................................................................  29
   9.19 Confidentiality; No Publication..........................................................................  29
   9.20 Arbitration..............................................................................................  29 
</TABLE> 

Revolving Credit Agreement 

                             Page 15 of 112 Pages
<PAGE>
 
                          REVOLVING CREDIT AGREEMENT

     THIS REVOLVING CREDIT AGREEMENT (this "AGREEMENT"), dated as of October 9,
1998, is made among JOHN C. MALONE ("BORROWER"), each of the Persons listed on
the signature pages hereof (collectively called, together with each Person that
becomes a Lender pursuant to SECTION 9.11, the "LENDERS," and individually a
"LENDER"), and NATIONSBANK, N.A., a national banking association, as agent for
Lenders to the extent and in the manner provided in SECTION 8 (together with any
successors and assigns, "Agent"), Toronto Dominion Securities (USA), Inc. and
Societe Generale as Co-Agents for Lenders.

                                R E C I T A L S

     1.   Borrower has requested that Lenders provide to Borrower a revolving
credit facility of up to $345,000,000 to provide (a) funds of up to $311,000,000
for the purchase of 8,718,770 shares (the "ACQUIRED STOCK") of the Series B
Common Stock, $1.00 par value, of Tele-Communications, Inc. ("TCI"), and (b)
funds for other business purposes, including interest rate and equity hedging
products and paying accrued interest and commitment fees on the Loan.

     2.   Lenders are willing to provide such a facility to Borrower, upon the
terms, and subject to the conditions, hereinafter set forth.

     NOW, THEREFORE, in consideration of the mutual promises herein contained,
and for other good and valuable consideration, the receipt and sufficiency of
which are hereby acknowledged, the parties hereto agree as follows:

SECTION 1  DEFINITIONS.

     1.1  Definitions. As used in this Agreement, all exhibits and schedules
hereto and in any note, certificate, report, or other Loan Document made or
delivered pursuant to this Agreement, the following terms have the respective
meanings assigned to them in this SECTION 1, or in the section or recital
referred to below:

     "Acquired Stock" has the meaning set forth in the recitals.

     "Advance" means (a) each disbursement by Lenders of a sum or sums lent to
Borrower pursuant to this Agreement, (b) each conversion of an Advance to
another Type or Advance, and (c) each rollover of a Eurodollar Advance to a
successive Interest Period.

     "Affiliate" of any Person means any other Person directly or indirectly,
controlling, controlled by, or under common control with, such Person.

     "Agent" has the meaning set forth in the first paragraph of this Agreement.

     "Agent's Lending Office" means Agent's lending office located at 901 Main
Street, Dallas, Texas 75202, or such other address as Agent may hereafter
designate in writing as Agent's Lending Office by notice to Borrower and
Lenders.

     "Agreement" means this Revolving Credit Agreement, including the schedules
and exhibits hereto, as the same may be renewed, extended, or modified from time
to time.

                             Page 16 of 112 Pages
<PAGE>
 
     "Applicable Lending Office" means for each Lender and each Type of Advance,
the lending office of such Lender (or of an Affiliate of such Lender) designated
for such Type of Advance below its name on the signature pages hereof or an
Assignment and Acceptance, or such other office of such Lender (or of an
Affiliate of such Lender) as such Lender may from time to time specify to
Borrower and Agent by written notice in accordance with the terms of this
Agreement as the office by which its Advances of such Type are to be made and
maintained.

     Applicable Margin means with respect to each Eurodollar Advance, (a) 1.00%
per annum, until both (i) the Merger has occurred, and (ii) the Pledged Shares
can be transferred (including pursuant to the Pledge Agreement) (A) without
registration under the Securities Act of 1933, as amended, in accordance with
the requirements of Rule 145 and (B) without restriction (except the Conversion
Provision) or delay under the Related Agreements or any other agreement or
understanding and (b) 0.75% per annum after ITEMS (i) and (ii) have occurred.

     "Assignee" has the meaning set forth in SECTION 9.11(B).

     "Assigning Lender" has the meaning set forth in SECTION 9.11(B).

     "Assignment and Acceptance" means an assignment and acceptance entered into
by an Assigning Lender and its Assignee and accepted by Agent pursuant to
SECTION 9.11, in substantially the form of EXHIBIT A.

     "Borrower" has the meaning set forth in the first paragraph of this
Agreement.

     "Business Day" means (a) any day on which Agent is open for regular
business, and (b) with respect to all borrowings, payments, conversions,
continuations, Interest Periods, and notices in connection with Eurodollar
Advances, any day which is a Business Day described in clause (a) above and
which is also a day on which dealings in Dollar deposits are carried out in the
London interbank market.

     "Co-Agent" means each of Toronto Dominion Securities (USA), Inc. and
Societe Generale.

     "Code" means the Internal Revenue Code of 1986, as amended, and all
regulations promulgated and rulings issued thereunder.

     "Collateral" has the meaning assigned to such term in the Pledge Agreement.

     "Collateral Documents" means the Pledge Agreement and all security
agreements, pledge agreements, and other agreements or documents executed or
delivered to secure repayment of the Obligation, or any part thereof.

     "Commitment" means, as to each Lender as of any date, the obligation of
such Lender on such date to make Advances hereunder in an aggregate principal
amount at any time outstanding up to but not exceeding the amount set forth
below its name on the signature pages hereof (or in an Assignment and
Acceptance) as its Commitment, as the same may be reduced pursuant to the terms
hereof.

     "Commitments" means the Commitments of all Lenders in the original
aggregate principal amount of $345,000,000.


                             Page 17 of 112 Pages
<PAGE>
 
     "Contract Rate" means (a) with respect to a Prime Rate Advance, the Prime
Rate, and (b) with respect to a Eurodollar Advance, the Eurodollar Rate plus the
Applicable Margin.

     "Default Rate" means a per annum rate of interest equal from day-to-day to
the lesser of (a) the sum of the Prime Rate plus three percent, and (b) the
Maximum Rate.

     "Dollars" and "$" mean lawful money of the United States of America.

     "Eligible Assignee" means any commercial bank, savings and loan
association, savings bank, finance company, insurance company, pension fund,
mutual fund, or other financial institution (whether a corporation, partnership,
or other entity) approved by Agent and, so long as no Potential Default or Event
of Default has occurred and is continuing, Borrower, such approvals not to be
unreasonably withheld.

     "Eurodollar Advance" means any Advance that bears an interest rate
calculated by reference to the Eurodollar Rate for a particular Interest Period.

     "Eurodollar Rate" means, for any Eurodollar Advance for any Interest Period
therefor, the rate per annum (rounded upwards, if necessary, to the nearest
1/16th of one percent) equal to the rate appearing on page "LIBO" on the Reuter
Monitor System (or any successor page; or in the absence thereof, an equivalent
source obtained by Agent) as the London interbank offered rate for deposits in
Dollars at approximately 11:00 a.m. (London time) two Business Days prior to the
first day of such Interest Period for a term comparable to such Interest Period.

     "Eurodollar Reserve Requirement" means, for any Lender on any day, that
percentage (expressed as a decimal fraction) that is in effect on such day, as
provided by the Board of Governors of the Federal Reserve System (or any
successor governmental body), applied for determining the reserve requirements
of such Lender (including basic, supplemental, marginal, and emergency reserves)
under Regulation D, with respect to "Eurocurrency liabilities" as currently
defined in Regulation D, or under any similar or successor regulation with
respect to Eurocurrency liabilities or Eurocurrency funding.  Each determination
by any Lender of the Eurodollar Reserve Requirement shall, in the absence of
manifest error, be conclusive and binding.

     "Event of Default" has the meaning set forth in Section 7.1.

     "Federal Funds Rate" means, on any day, the annual rate (rounded upwards,
if necessary, to the nearest 0.01%) determined by Agent (which determination is
conclusive and binding, absent manifest error) to be equal to the weighted
average of the rates on overnight federal funds transactions with member banks
of the Federal Reserve System arranged by federal funds brokers as published by
the Federal Reserve Bank of New York on the next successive Business Day;
provided, however, that (a) if such determination date is not a Business Day,
the Federal Funds Rate for such day shall be the rate for such transactions on
the next preceding Business Day as published on the next successive Business
Day, or (b) if those rates are not published for any Business Day, the Federal
Funds Rate shall be the average of the quotations at approximately 10:00 a.m. on
such Business Day received by Agent from three federal funds brokers of
recognized standing selected by Agent in its sole discretion.

     "Funding Loss" has the meaning set forth in EXHIBIT D.

     "Governmental Authority" means any nation or government, any state or
political subdivision thereof, and any entity exercising executive, legislative,
judicial, regulatory, or administrative functions of


                             Page 18 of 112 Pages
<PAGE>
 
or pertaining to government.

     "Governmental Requirement" means any federal, state, local, municipal,
foreign, international, multinational, or other administrative order,
constitution, law, ordinance, principle of common law, regulation, statute, or
treaty as in effect on the date hereof.

     "High Vote Stock" has the meaning assigned to such term in the Malone Call
Agreement.

     "Initial Collateral" shall mean the shares of common stock more fully
described on SCHEDULE 5.2 attached hereto.

     "Interest Period" means, with respect to a Eurodollar Advance, a period:
commencing (a) on the borrowing date of such Eurodollar Advance; or (b) on the
conversion date pertaining to such Eurodollar Advance, if made pursuant to a
conversion as described in SECTION 2.2(C); or (c) on the last day of the
preceding Interest Period, in the case of a rollover to a successive Interest
Period;  and ending one, two, three, four, or six months thereafter, as Borrower
shall elect in accordance with SECTION 2.2(c); provided that:  (i) any Interest
Period that would otherwise end on a day which is not a Business Day shall be
extended to the next succeeding Business Day, unless such Business Day falls in
another calendar month, in which case such Interest Period shall end on the next
preceding Business Day; (ii) any Interest Period that begins on the last
Business Day of a calendar month (or on a day for which there is no numerically
corresponding day in the calendar month at the end of such Interest Period)
shall, subject to CLAUSE (i) above, end on the last Business Day of a calendar
month; and (iii) if the Interest Period for any Eurodollar Advance would
otherwise end after the final maturity date of the Loan, then such Interest
Period shall end on the final maturity date of the Loan.

     "June Option Agreement" means the Letter Agreement, dated as of June 16,
1997, between Borrower and TCI regarding Borrower's right to acquire the
Acquired Stock from TCI.

     "Lender" and "Lenders" have the meanings set forth in the first paragraph
of this Agreement.

     "Lien" means any lien, mortgage, security interest, tax lien, pledge,
negative pledge, encumbrance, conditional sale, or title retention arrangement,
or any other interest in property designed to secure the repayment of
indebtedness, whether arising by agreement, or under any statute, law, or
otherwise.

     "Loan" means the revolving credit loan made or to be made hereunder to
Borrower by Lenders pursuant to SECTION 2.1.

     "Loan Documents" means this Agreement, the Notes, the Collateral Documents,
and any agreements, documents (and with respect to this Agreement and such other
agreements and documents, any renewals, extensions, amendments, or supplements
thereto), or certificates at any time executed or delivered pursuant to the
terms of this Agreement.

     "Low Vote Stock" means has the meaning assigned to such term in the Malone
Call Agreement.

     "Malone Call Agreement" means that certain Call Agreement, dated as of
February 9, 1998, between TCI, Borrower, and Leslie Malone, as it may be amended
or modified from time to time.

     "Margin Requirements" means all statutes, regulations and interpretations
pertaining to 

                             Page 19 of 112 Pages
<PAGE>
 
extensions of credit to purchase or carry, or extensions of credit secured
(directly or indirectly) by, margin stock, including the certification, loan-to-
value, and other requirements of the Securities Exchange Act of 1934 and
Regulations U and X of the Board of Governors of the Federal Reserve System, and
any successor regulations.

     "Material Adverse Effect" means any material adverse change in, or effect
upon, (a) the validity, performance, or enforceability of any Loan Document, (b)
the financial condition of Borrower, or (c) the ability of Borrower to fulfill
its obligations under the Loan Documents.

     "Maximum Rate" means the highest nonusurious rate of interest (if any)
permitted from day-to- day by applicable law. Agent and Lenders hereby notify
and disclose to Borrower that, for purposes of Tex. Rev. Civ. Stat. Ann. art.
5069-1.04, as it may from time to time be amended, the "applicable rate ceiling"
shall be the "indicated rate" ceiling from time to time in effect, as limited by
article 5069-1.04(b); provided, however, that to the extent permitted by
applicable law, Agent and Lenders reserve the right to change the "applicable
rate ceiling" from time to time by further notice and disclosure to Borrower.

     "Merger" means the merger contemplated by the Agreement and Plan of
Restructuring and Merger, dated as of June 23, 1998, among AT&T Corp., Italy
Merger Corp, and TCI, pursuant to which TCI will become a wholly owned
subsidiary of AT&T Corp.

     "Merger Shares" has the meaning given in SECTION 5.11.

     "Notes" means the Revolving Credit Notes in substantially the form of
EXHIBIT B, executed by Borrower and delivered pursuant to the terms of this
Agreement, together with any renewals, extensions, or modifications thereof, and
"NOTE" means any one of the Notes.

     "Notice of Borrowing" means, with respect to any Advance, a notice
substantially in the form of Exhibit C.

     "Obligation" means all present and future indebtedness, obligations, and
liabilities, and all renewals and extensions thereof, or any part thereof, now
or hereafter owed to Agent or any Lender by Borrower arising pursuant to any of
the Loan Documents, and all renewals and extensions thereof, together with all
interest accruing thereon, and costs, expenses, and reasonable attorneys' fees
incurred in the enforcement or collection thereof.

     "Permitted Class" has the meaning given to such term in the Pledge
Agreement.

     "Person" includes an individual, corporation, joint venture, general or
limited partnership, limited liability company, trust, unincorporated
organization, or government, or any agency or political subdivision thereof.

     "Pledge Agreement" means that certain Pledge Agreement, dated as of the
date hereof, executed by Borrower in favor of Agent, Co-Agents, and Lenders, and
any renewals, extensions, modifications, or restatements thereof.

     "Pledged Shares" has the meaning assigned to such term in the Pledge
Agreement.

     "Potential Default" means the occurrence of any event which with passage of
time, or giving of notice, or both, could become an Event of Default.

                             Page 20 of 112 Pages
<PAGE>
 
     "Prime Rate" means, at any time, the greater of (a) the variable rate of
interest established from time to time by Agent as its "prime rate" and set by
Agent as a general reference rate of interest charged by Agent, and (b) the
Federal Funds Rate plus one-half of one percent.  Borrower acknowledges that
Agent may, from time to time, extend credit to other borrowers at rates of
interest varying from, and having no relationship to, such general reference
rate. Each change in the Prime Rate shall become effective without prior notice
to Borrower automatically as of the opening of business on the date of such
change in the Prime Rate.

     "Prime Rate Advance" means any Advance hereunder with respect to which the
interest rate is calculated by reference to the Prime Rate.

     "Principal Debt" means, at the time of any determination thereof, the
aggregate unpaid principal balance of all Advances.

     "Pro Rata" and "Pro Rata Part" mean, on any date of determination thereof
for any Lender (a) at any time prior to the termination of the Commitments, the
proportion that such Lender's Commitment bears to the Commitments of all
Lenders, and (b) at any time on and after the termination of the Commitments,
the proportion that the Principal Debt owed to such Lender bears to the
Principal Debt owed to all Lenders (provided that for purposes of SECTIONS
2.6(E)(II) and 8.1(A)(VII), PRO RATA PART means the proportion that the
Principal Debt owed to a Lender bears to the Principal Debt owed to all
Lenders.)

     "Register" has the meaning set forth in SECTION 9.11(D).

     "Regulation D" means Regulation D of the Board of Governors of the Federal
Reserve System, from time to time in effect, and shall include any successor or
other regulation relating to reserve requirements applicable to member banks of
the Federal Reserve System.

     "Related Agreements" means the Stockholders Agreement, the Malone Call
Agreement, the June Option Agreement, and the Voting Agreement (as it may be
amended or modified from time to time).

     "Required Lenders" means, as of any date, any combination of Lenders who
collectively hold 51% of (i) the sum of the Commitments, or (ii) if the
Commitments have been terminated, then of the Principal Debt owed all Lenders.

     "Rule 145" means Rule 145 promulgated pursuant to the Securities Act of
1933, and any successor regulations.

     "Stockholders Agreement" means that certain Stockholders Agreement, dated
as of February 9, 1998, between TCI, Borrower, Leslie Malone, Gary Magness, Kim
Magness, the Estate of Bob Magness, and the Estate of Betsy Magness, as it may
be amended or modified from time to time.

     "T Stock" has the meaning assigned to such term in the Pledge Agreement

     "TCI" means Tele-Communications, Inc., a Delaware Corporation.

     "Taxes" means, for any Person, taxes, assessments, or other governmental
charges or levies imposed upon it, its income, or any of its properties,
franchises, or assets.

     "Termination Date" means the earlier of (a) April 10, 2000, (b) the date
Lenders' commitments to 

                             Page 21 of 112 Pages
<PAGE>
 
fund Advances hereunder are terminated pursuant to SECTION 7.2, and (c) the date
that Lenders' commitments to fund Advances hereunder are reduced to zero
pursuant to SECTION 2.1(B).

     "Type" means any type of Advance (i.e., Prime Rate Advance or Eurodollar
Advance).

     "Voting Agreement" means that certain Agreement, dated as of June 23, 1998,
as Amended and Restated as of October 9, 1998, among AT&T Corp., Borrower, and
Leslie Malone.

     "Waiver Letters" means (a) the letter dated October 9, 1998, to Agent and
Lenders from TCI, regarding the waiver of certain provisions of  the Malone Call
Agreement, and (b) the letter dated October 9, 1998, to Agent and Lenders from
TCI, Kim Magness (in a representative capacity and individually), Gary Magness
(in a representative capacity and individually), the Estate of Betsy Magness,
and the Estate of Bob Magness, regarding the waiver of certain provisions of the
Stockholders Agreement.

     1.2  RULES OF CONSTRUCTION.  When used in this Agreement:  (a) "or" is not
exclusive; (b) a reference to a law includes any amendment or modification to
such law; (c) a reference to a Person includes its permitted successors and
permitted assigns; (d) except as provided otherwise, all references to the
singular shall include the plural, and vice versa; (e) except as provided in
this Agreement, a reference to an agreement, instrument, or document shall
include such agreement, instrument, or document, as the same may be amended,
modified, or supplemented from time to time in accordance with its terms and as
permitted by the Loan Documents; (f) all references to SECTIONS, EXHIBITS, and
SCHEDULES shall be to sections of and exhibits and schedules to this Agreement,
unless otherwise indicated; (g) all EXHIBITS and SCHEDULES to this Agreement
shall be incorporated into this Agreement; (h) the words "include," "includes,"
and "including" shall be deemed to be followed by the phrase "without
limitation;" and (i) except as otherwise provided herein, in the computation of
time, from a specified date to a later specified date, the word "from" means
"from and including," and words "to" and "until" each mean "to but excluding."


SECTION 2  THE REVOLVING CREDIT FACILITY.

     2.1  COMMITMENT TO LEND.

     (A)  COMMITMENT. Subject to and in reliance upon the terms, conditions,
representations, and warranties in the Loan Documents, including the provisions
in SECTION 2.1(c), each Lender severally and not jointly agrees to lend to
Borrower such Lender's Pro Rata Part of one or more Advances not to exceed such
Lender's Commitment, which, subject to the Loan Documents, Borrower may borrow,
repay, and reborrow under this Agreement; provided that each such Advance must
occur on a Business Day preceding the Termination Date.

     (B)  VOLUNTARY TERMINATION OF COMMITMENTS. Without premium or penalty, and
upon giving not less than five Business Days prior written and irrevocable
notice to Agent, Borrower may terminate in whole or in part the unused portion
of the Commitments; provided that: (i) each partial termination shall be in an
amount of not less than $500,000 or a greater integral multiple thereof; (ii)
the amount of the Commitments may not be reduced below the amount of the
Obligation at such time; and (iii) each reduction shall be allocated to each
Lender's Commitment Pro Rata among all Lenders in accordance with their
respective Pro Rata Parts. Promptly after receipt of such notice or termination
or reduction, Agent shall notify each Lender of the cancellation or reduction.

                             Page 22 of 112 Pages
<PAGE>
 
     (c)  COLLATERAL REQUIREMENTS. As a condition to Lenders' obligation to make
any Advance hereunder, Borrower must be in compliance with the requirements of
SECTION 6 of the Pledge Agreement related to maintenance of Collateral and with
all Margin Requirements. In addition, Borrower shall be obligated to deliver
additional Collateral to Agent or prepay the Notes, on the terms set forth in
SECTION 6 of the Pledge Agreement, or as required to satisfy Margin
Requirements.

     (d)  USE OF PROCEEDS. Borrower shall use the proceeds of the Loan solely
for the purposes described in the recitals. Borrower shall not use proceeds of
any Advance (i) for any unlawful purpose, or (ii) for the purpose of making any
hostile tender offer to acquire shares of stock or other equity interests in
another Person.

     2.2  METHOD OF BORROWING.

     (a)  APPLICATION FOR ADVANCE. Borrower shall deliver to Agent a Notice of
Borrowing at least one Business Day prior to any Prime Rate Advance and at least
three Business Days prior to any Eurodollar Advance. Each Notice of Borrowing
must be received by Agent no later than 1:00 p.m. (Dallas, Texas time) as of the
applicable date. Prior to making a Notice of Borrowing, Borrower may (without
specifying whether the Advance shall be a Prime Rate Advance or a Eurodollar
Advance) request that Agent provide Borrower with the most recent Eurodollar
Rate. Agent shall endeavor to provide such quoted rate to Borrower on the date
of such request.

     (b)  FUNDING.

          (i)  Promptly after receipt of a Notice of Borrowing under SECTION
     2.2(A), Agent shall notify each Lender by telex or telecopy, or other
     similar form of transmission, of the proposed Advance. Each Lender shall
     deposit an amount equal to its Pro Rata Part of the Advance requested by
     Borrower with Agent at its Lending Office, in immediately available funds
     not later than 11:00 a.m. (Dallas, Texas time) on the date of such proposed
     Advance. Upon fulfillment of all applicable conditions set forth herein,
     Agent shall make available to Borrower at Agent's Lending Office, not later
     than 2:00 p.m. (Dallas, Texas time) on the date of each Advance, the
     proceeds of each Lender's Pro Rata Part of the Advance actually received by
     Agent. The failure of any Lender to deposit the amount described above with
     Agent shall not relieve any other Lender of its obligations hereunder to
     make its Advance.

          (ii) Unless Agent shall have been notified by any Lender that such
     Lender will not make available to Agent such Lender's Pro Rata Part of a
     proposed Advance, Agent may in its discretion assume that such Lender has
     made such Advance available to Agent in accordance with this SECTION and
     Agent may, if it chooses, in reliance upon such assumption, make such
     Advance available to Borrower. If and to the extent such Lender shall not
     so make its Pro Rata Part of the proposed Advance available to Agent, such
     Lender severally agrees to pay or repay to Agent on demand the amount of
     such Advance together with interest thereon, for each day from the date
     such Advance is made available to Borrower until the date such amount is
     paid or repaid to Agent at the Federal Funds Rate. If such Lender shall
     repay to Agent such amount, such amount so repaid shall constitute such
     Lender's Advance for purposes of this Agreement.

     (c)  SELECTION OF INTEREST OPTION PERIOD.

          (i)  Upon making a Notice of Borrowing under SECTION 2.2(A), Borrower
     shall advise Agent as to whether the Advance shall be (A) a Eurodollar
     Advance, in which case Borrower shall

                             Page 23 of 112 Pages
<PAGE>
 
     specify the applicable Interest Period therefor, or (B) a Prime Rate
     Advance.

          (ii)   Subject to the dollar limits and denominations of SECTION 2.1,
     Borrower may (A) convert a Eurodollar Advance on the last day of the
     applicable Interest Period to a Prime Rate Advance, (B) convert a Prime
     Rate Advance on any Business Day to a Eurodollar Advance, and (C) elect a
     new Interest Period for a Eurodollar Advance, by giving a Notice of
     Borrowing to Agent no later than 1:00 p.m. (Dallas, Texas time) on the
     third (3rd) Business Day before the conversion date or the last day of the
     Interest Period, as the case may be (for conversion to a Eurodollar Advance
     or election of a new Interest Period), and no later than 1:00 p.m. (Dallas,
     Texas time) one Business Day before the last day of the Interest Period
     (for conversion to a Prime Rate Advance). Absent Borrower's Notice of
     Borrowing, a Eurodollar Advance shall be deemed converted to a Prime Rate
     Advance effective when the applicable Interest Period expires.

          (iii)  Notwithstanding anything to the contrary contained herein, (A)
     no more than three Interest Periods shall be in effect at any one time with
     respect to Eurodollar Advances, and (B) Borrower shall have no right to
     request a Eurodollar Advance if the Interest Rate applicable thereto under
     SECTION 2.4 would exceed the Maximum Rate in effect on the first day of the
     Interest Period applicable to such Advance.

          (iv)   Each Notice of Borrowing shall be irrevocable and binding on
     Borrower and, in respect of any Eurodollar Advance specified in such Notice
     of Borrowing, Borrower shall indemnify Agent and Lenders against any
     Funding Loss incurred by Agent or Lenders as a result of (A) any failure to
     fulfill, on or before the date specified for such Advance, the conditions
     to such Advance set forth herein, or (B) Borrower's requesting that an
     Advance not be made on the date specified for such Advance in the Notice of
     Borrowing. A certificate of Agent and each Lender establishing the amount
     due from Borrower according to the preceding sentence, together with a
     description in reasonable detail of the manner in which such amount has
     been calculated, shall be presumed to be correct in the absence of manifest
     error.

     2.3  NOTES. The Loan made under SECTION 2.1 by Lenders shall be evidenced
by the Notes, one payable to each Lender in the stated amount of its Commitment,
in the aggregate principal amount of $345,000,000.

     2.4  INTEREST RATE.

     (a)  ALL ADVANCES. The unpaid principal of each Prime Rate Advance shall
bear interest from the date of Advance to the date of repayment thereof at a
rate per annum that shall from day-to-day be equal to the lesser of (i) the
Prime Rate in effect from day-to-day, and (ii) the Maximum Rate. The unpaid
principal of each Eurodollar Advance shall bear interest from the date of
advance to the date of repayment thereof at a rate per annum that shall be equal
to the lesser of (i) the Eurodollar Rate plus the Applicable Margin, and (ii)
the Maximum Rate.

     (b)  DEFAULT RATE. All past due principal of, and to the extent permitted
by applicable law, interest on, the Note shall bear interest until paid at the
Default Rate.

     (c)  RECAPTURE RATE. If the applicable Contract Rate ever exceeds the
Maximum Rate, thereby causing the interest charged under the Notes to be limited
to the Maximum Rate, then, to the extent permitted by applicable law, any
subsequent reductions in the applicable Contract Rate shall not reduce the rate
of interest charged under the Notes below the Maximum Rate, until the total
amount of

                             Page 24 of 112 Pages
<PAGE>
 
interest accrued on the Notes equals the amount of interest that would have
accrued thereon if the applicable Contract Rate had at all times been in effect.

     (d)  GENERAL PROVISIONS AS TO INTEREST.

          (i)  Interest will be calculated on the basis of actual number of days
     (including the first day but excluding the last day) elapsed but computed:
     (A) with respect to Eurodollar Advances, as if each calendar year consisted
     of 360 days (unless the calculation would result in an interest rate
     greater than the Maximum Rate, in which event interest will be calculated
     on the basis of a year of 365 or 366 days, as the case may be); and (B)
     with respect to Prime Rate Advances, on the basis of a year of 365 or 366
     days, as the case may be.  All interest rate determinations and
     calculations by Agent are presumed to be correct in the absence of manifest
     error.

          (ii) The provisions of this Agreement relating to calculation of the
     Prime Rate and the Eurodollar Rate are included only for the purpose of
     determining the rate of interest or other amounts to be paid under this
     Agreement that are based upon those rates. Each Lender may fund and
     maintain its funding of all or any part of each Advance as it selects.

     2.5  SPECIAL PROVISIONS FOR EURODOLLAR ADVANCES; TAXES.

     (a)  EURODOLLAR ADVANCES. With respect to Eurodollar Advances, the
provisions of EXHIBIT D (regarding inadequacy of pricing, illegality, increased
costs, and funding losses) shall apply.

     (b)  TAXES.  Subject to SECTION 2.5(c), any Taxes payable by Agent or any
Lender or ruled (by a Governmental Authority) payable by Agent or any Lender in
respect of this Agreement or any other Loan Document shall, if permitted by
Governmental Requirement, be paid by Borrower, together with interest and
penalties, if any (except for Taxes imposed on or measured by the overall net
income of Agent or such Lender). Agent or such Lender (through Agent) shall
notify Borrower and deliver to Borrower a certificate setting forth in
reasonable detail the calculation of the amount of payable Taxes, which
certificate is presumed to be correct in the absence of manifest error, and
Borrower shall promptly pay that amount to Agent for its account or the account
of such Lender, as the case may be. If Agent or such Lender subsequently
receives a refund of the Taxes paid to it by Borrower, then the recipient shall
promptly pay the refund to Borrower.

     (c)  FOREIGN LENDERS. Each Lender that is organized under the Governmental
Requirements of any jurisdiction other than the United States of America or any
State thereof (i) represents to Agent and Borrower that (A) no Taxes are
required to be withheld by Agent or Borrower with respect to any payments to be
made to it in respect of the Obligation, and (B) it has furnished to Agent and
Borrower two (2) duly completed copies of U.S. Internal Revenue Service Form
4224, Form 1001, Form W-8, or any other tax form acceptable to the Agent
(wherein it claims entitlement to complete exemption from U.S. federal
withholding tax on all interest payments under the Loan Documents), and (ii)
covenants to (A) provide Agent and Borrower a new tax form upon the expiration
or obsolescence of any previously delivered form according to Governmental
Requirement, duly executed and completed by it, and (B) comply from time to time
with all Governmental Requirements with regard to the withholding tax exemption.
If any of the foregoing is not true or the applicable forms are not provided,
then Borrower or Agent (without duplication) may deduct and withhold from
interest payments under the Loan Documents United States federal income tax at
the full rate applicable under the Code.

                             Page 25 of 112 Pages
<PAGE>
 
     (d)  SURVIVAL. Without prejudice to the survival of any other obligations
of Borrower hereunder, the obligations of Borrower under this SECTION 2.5 shall
survive the termination of this Agreement and/or the payment or assignment of
the Notes.

     2.6  PAYMENTS OF THE NOTE.

     (a)  PAYMENT OF INTEREST ON THE NOTES. Interest on each Eurodollar Advance
shall be due and payable as it accrues on the last day of its respective
Interest Period; provided that if any Interest Period is a period greater than
three months, then accrued interest shall also be due and payable on the date
three months after the commencement of such Interest Period. Interest on each
Prime Rate Advance shall be due and payable as it accrues on the last day of
each calendar quarter, and on the Termination Date.

     (b)  PAYMENT OF PRINCIPAL OF THE NOTES.  The Notes shall mature, and the
principal amount thereof shall be due and payable, on the Termination Date.

     (c)  OPTIONAL PREPAYMENTS. Upon three Business Days' notice for Eurodollar
Advances and one Business Day's notice for Prime Rate Advances, Borrower may
prepay the principal of any of the Notes then outstanding, in whole or in part,
at any time or from time to time; provided, however, that (i) each prepayment of
less than the full outstanding principal balance of a Note shall be in an amount
equal to at least $250,000, and (ii) if Borrower prepays the principal of any
Eurodollar Advance on any date other than the last day of the Interest Period
applicable thereto, Borrower shall pay any Funding Loss with respect to such
payment. Any optional prepayment of the principal of the Notes shall be applied
to the Notes on a pro rata basis based upon the outstanding principal balances
of the Notes as of the date of payment.

     (d)  MANDATORY PREPAYMENTS.  Borrower shall be obligated to make mandatory
prepayments on the Notes, in accordance with Section 2.1(c).

     (e)  GENERAL PROVISIONS AS TO PAYMENTS.

          (i)  All payments of principal of, and interest on, any Note to or for
     the account of any Lender shall be made by Borrower to Agent before 12:00
     p.m. (Dallas, Texas time), in Federal or other immediately available funds
     at Agent's Lending Office. If the principal of, or interest on, a Note, or
     any other amount payable hereunder, becomes due and payable on a day other
     than a Business Day, then the maturity thereof shall be extended to the
     next succeeding Business Day. Each payment received by Agent hereunder for
     the account of a Lender shall be promptly distributed by Agent to such
     Lender. Except as otherwise provided, all payments made on any Note shall
     be credited, to the extent of the amount thereof, in the following manner:
     (A) first, against the amount of interest accrued and unpaid on such Note
     as of the date of such payment; (B) second, against all principal (if any)
     due and owing on such Note as of the date of such payment; (C) third, as a
     prepayment of outstanding Prime Rate Advances under such Note; and (D)
     fourth, as a prepayment of outstanding Eurodollar Advances under such Note.
     Subject to the foregoing, so long as no Potential Default or Event of
     Default exists, payments and prepayments of principal of any Note shall be
     applied to such outstanding Prime Rate Advances and Eurodollar Advances
     under such Note as Borrower shall select; provided, however, that Borrower
     shall select Prime Rate Advances and Eurodollar Advances to be repaid in a
     manner designed to minimize the Funding Loss, if any, resulting from such
     payments; and provided further that, if Borrower shall fail to select the
     Prime Rate Advance or Eurodollar Advance to which such payments are to be
     applied, or if a Potential Default or Event of Default exists at the time
     of such payment, then

                             Page 26 of 112 Pages
<PAGE>
 
     Agent shall be entitled to apply the payment to such Prime Rate Advances
     and Eurodollar Advances in the manner it shall deem appropriate.

          (ii) Each payment received by Agent hereunder for the account of
     Lenders or any of them on the Notes shall be distributed to each Lender
     entitled to share in such payment, Pro Rata in proportion to the Pro Rata
     Parts of each Lender (less any taxes, levies, imposts, deductions, charges
     or withholdings excluded from the definition of Taxes). Unless Agent shall
     have received notice from Borrower prior to the date on which any payment
     is due to Lenders hereunder that Borrower will not make such payment in
     full, Agent may assume that Borrower has made such payment in full to Agent
     on such date and Agent may, in reliance upon such assumption, cause to be
     distributed to each Lender on such due date an amount equal to the amount
     then due such Lender. If and to the extent Borrower shall not have so made
     such payment in full to Agent, each Lender shall repay to Agent forthwith
     on demand such amount distributed to such Lender together with interest
     thereon, for each day from the date such amount is distributed to such
     Lender until the date such Lender repays such amount to Agent, at the
     Federal Funds Rate.

     2.7  FEES.  Borrower shall pay to Agent, for the ratable benefit of
Lenders, in accordance with their respective Pro Rata Parts, a commitment fee
equal to $517,500 (i.e., 15 basis points on the Commitment). Borrower
acknowledges that such fee is a bona fide commitment fee and is intended as
reasonable compensation to Lenders for committing to make funds available to
Borrower as described herein, and for no other purposes. In addition, Borrower
shall pay to Agent, for its own account, an administrative fee of $15,000 per
year for the first year, payable on the date hereof, and $10,000 per year for
each subsequent year, payable on each anniversary of the date hereof (pro rated
with any excess for the final year refundable after the Termination Date).

     2.8  TERMINATION OF COMMITMENT.  The Commitments shall terminate on the
Termination Date, and any Advances then outstanding (together with accrued
interest thereon) shall be due and payable on such date.

     2.9  SHARING OF PAYMENTS, ETC.  If any Lender obtains any amount (whether
voluntary, involuntary, or otherwise, including as a result of exercising any
rights under SECTION 2.10) that exceeds the part of that payment that such
Lender is entitled to receive under the Loan Documents, then such Lender shall
purchase from the other Lenders participations that will cause the purchasing
Lender to share the excess amount ratably with each other Lender.  If all or any
portion of any excess amount is subsequently recovered from the purchasing
Lender, then the purchase shall be rescinded and the purchase price restored to
the extent of the recovery.  Borrower agrees that any Lender purchasing a
participation from another Lender under this SECTION, may, to the fullest extent
permitted by applicable law, exercise all of its rights of payment with respect
to that participation as fully as if such Lender were the direct creditor of
Borrower in the amount of that participation.

     2.10 SET-OFF.  If an Event of Default exists, each Lender is entitled, but
not obligated, to exercise (for the benefit of all Lenders in accordance with
SECTION 2.9) the right of off-set and banker's Lien against each and every
account and other property, or any interest therein, that Borrower may now or
hereafter have with, or which is now or hereafter in the possession of, such
Lender to the extent of the amount of the Obligation owed to it.

     2.11 CAPITAL ADEQUACY.  If a Lender shall have reasonably determined that,
after the date hereof, either (i) the adoption of any applicable law, rule,
regulation, or guideline regarding capital adequacy, or any change therein, or
any change in the interpretation or administration thereof by any 

                             Page 27 of 112 Pages
<PAGE>
 
Governmental Authority, central bank, or comparable agency charged with the
interpretation or administration thereof, or (ii) compliance by such Lender (or
any lending office of such Lender) with any request or directive regarding
capital adequacy (whether or not having the force of law) of any such authority,
central bank, or comparable agency, has or would have the effect of reducing the
rate of return on such Lender's capital as a consequence of its or Borrower's
obligations hereunder to a level below that which such Lender could have
achieved but for such adoption, change, or compliance by an amount reasonably
deemed by such Lender to be material, then from time to time, within ten days
after demand by such Lender, Borrower shall pay to such Lender such additional
amount as will adequately compensate such Lender for such reduction. Each Lender
will notify Borrower of any event of which it has actual knowledge, occurring
after the date thereof, which will entitle such Lender to compensation pursuant
to this Section 2.11. No failure by a Lender to immediately demand payment of
any additional amounts payable hereunder shall constitute a waiver of such
Lender's right to demand payment of such amounts at any subsequent time.

SECTION 3  COLLATERAL.

     3.1  LIENS AND SECURITY INTERESTS. To secure the performance by Borrower of
the payment and performance of the Obligation, pursuant to the Collateral
Documents, Borrower grants to Lenders a perfected, first priority, security
interest and lien in the Pledged Shares and other Collateral, including the
Initial Collateral.

SECTION 4  CONDITIONS PRECEDENT.

     4.1  INITIAL ADVANCE. The obligation of each Lender to make its initial
Advance hereunder is subject to the conditions precedent that, on or before the
date of such Advance, (a) Borrower shall have paid to Agent (i) all fees to be
received pursuant to this Agreement or any other Loan Document and (ii) an
amount equal to the estimated costs and out-of-pocket expenses of Agent's
counsel incurred in connection with the preparation, execution, and delivery of
the Loan Documents and the consummation of the transactions contemplated
thereby, and (b) Agent shall have received duly executed copies of each of the
documents listed on SCHEDULE 4.1, each dated as of the date of such Advance, and
each in form and substance satisfactory to Agent.

     4.2  ALL ADVANCES. The obligation of each Lender to make any Advance under
this Agreement (including the initial Advance but excluding any Advance which
does not increase the outstanding Principal Debt) shall be subject to the
conditions precedent that, as of the date of such Advance and after giving
effect thereto: (a) there exists no Potential Default or Event of Default; (b)
no change that would cause a Material Adverse Effect has occurred since the date
of the financial statements referenced in SECTION 5.7; (c) Agent shall have
received from Borrower a Notice of Borrowing dated as of the date of such
Advance and all of the statements contained in such Notice of Borrowing shall be
true and correct; (d) the representations and warranties contained in each of
the Loan Documents shall be true in all respects as though made on the date of
such Advance; (e) the Maximum Rate exceeds the Contract Rate; and (f) Borrower
has satisfied the condition precedent contained in SECTION 2.1(c).

SECTION 5  REPRESENTATIONS AND WARRANTIES.

     Borrower hereby represents and warrants to Lenders as follows:

     5.1  TAXES.  All tax returns required to be filed by Borrower in any
jurisdiction have been filed and all taxes, assessments, fees, and other
governmental charges upon Borrower, or upon any of his 

                             Page 28 of 112 Pages
<PAGE>
 
properties, or income, have been paid, except for taxes being contested in good
faith by appropriate proceedings diligently prosecuted and as to which adequate
reserves have been established. Borrower has no knowledge of any proposed tax
assessment against Borrower that will have, or is reasonably likely to have, a
Material Adverse Effect.

     5.2  PLEDGED SHARES. The Pledged Shares constituting the Initial
Collateral, as described on SCHEDULE 5.2, were acquired by Borrower, and held by
Borrower, for a period of at least two years prior to the date hereof, for
purposes of determining the holding period of such Pledged Shares under Rule 144
promulgated under the Securities Act of 1933, as amended, and Borrower has borne
the full economic risk of such Pledged Shares since their respective dates of
acquisition. None of the Pledged Shares were purchased by Borrower by giving TCI
or an Affiliate of TCI a promissory note or other obligation to pay the purchase
price of such Pledged Shares, and none of the Pledged Shares were purchased
under an installment purchase contract. Borrower is the lawful owner and holder
of such Pledged Shares, free and clear of all Liens, except for security
interests and liens granted to Lenders. Under the laws of the State of Colorado
and other applicable laws and under the Related Agreements, Borrower has full
right, power, and authority to pledge such Pledged Shares to Lenders, and the
pledge contemplated by the Pledge Agreement does not violate or contravene any
law, agreement (including the Related Agreements), or order to which Borrower is
subject.

     5.3  AUTHORITY AND COMPLIANCE. Borrower has full power and authority to
execute and deliver the Loan Documents and to incur and perform the obligations
provided for therein. No consent or approval of any public authority or other
third party is required as a condition to the validity of any Loan Document, and
Borrower is in compliance with all laws and regulatory requirements to which he
is subject.

     5.4  BINDING AGREEMENT. This Agreement and the other Loan Documents
executed by Borrower constitute valid and legally binding obligations of
Borrower, enforceable in accordance with their terms.

     5.5  LITIGATION. There is no proceeding against Borrower pending or, to the
knowledge of Borrower, threatened by or before any court or Governmental
Authority in which Borrower is a party in his individual capacity except as
disclosed on SCHEDULE 5.5 attached hereto.  There are no outstanding judgments
against Borrower.

     5.6  (A)  RELATED AGREEMENTS. Borrower has delivered to Agent true and
correct copies of the Related Agreements, together with any amendments or
modifications of any of the Related Agreements. To the best of Borrower's
knowledge, the Related Agreements are in full force and effect and have not been
terminated. Borrower is not in material default under any of the Related
Agreements. Except for the Related Agreements, Borrower is not a party to any
agreement, contract, or understanding, and the Pledged Shares (including any
Merger Shares issued in exchange for Pledged Shares) are not subject to any
agreement, contract, or understanding, in each case which (i) affects Borrower's
ownership and control of the Pledged Shares (including any Merger Shares issued
in exchange for Pledged Shares), or (ii) the pledge, transfer, or disposition by
Borrower of the Pledged Shares (including any Merger Shares issued in exchange
for Pledged Shares).

          (B)  NO CONFLICTING AGREEMENTS. Assuming Lenders' compliance with the
terms of the Waiver Letters, there is no provision of any existing agreement
(including the Related Agreements), mortgage, indenture, or contract binding on
Borrower or affecting Borrower's property including the Collateral, which would
conflict with, in any way prevent or delay, the execution, delivery, or carrying
out

                             Page 29 of 112 Pages
<PAGE>
 
of the terms of or violate this Agreement and the other Loan Documents,
including Lenders' foreclosure upon or disposition of the Pledged Shares,
including any Merger Shares issued in exchange for Pledged Shares. Assuming
Lenders' compliance with the terms of the Waiver Letters, Borrower has obtained
all consents and approvals (including any consents or approvals required under
the Related Agreements and consents of the Federal Communications Commission and
other Governmental Authorities) necessary or appropriate to permit or authorize
Borrower's pledge of the Pledged Shares (including any Merger Shares issued in
exchange for Pledged Shares) and Lenders' foreclosure upon or disposition of
Pledged Shares (including any Merger Shares issued in exchange for Pledged
Shares).

          (C)  CONVERSION.  The Malone Call Agreement, the Stockholders
Agreement, and the Agreement restrict Borrower's transfer of certain shares of
the common stock of TCI. Pursuant to and assuming Lenders' compliance with the
terms of the Waiver Letters, the Malone Call Agreement, the Stockholders
Agreement, and the Agreement permit Borrower's pledge of the Pledged Shares and
Lenders' foreclosure upon, and disposition of, such Pledged Shares.

     5.7  FINANCIAL STATEMENTS.  The personal financial statements of Borrower
heretofore delivered to Lenders, and dated September 23, 1998, properly reflect
Borrower's financial position as of the date thereof, and there has been no
material adverse change in Borrower's financial condition since the date of the
financial statements.  Borrower has good title to all assets reflected on such
financial statements, except as disclosed in such financial statements.
Borrower has no material indebtedness or liabilities, including guaranties and
other contingent liabilities, which are not reflected in such financial
statements.  To the best of Borrower's knowledge, all factual information
furnished by Borrower to Lenders in connection with this Agreement is and will
be accurate and complete on the date as of which such information is delivered
to Lenders and is not incomplete by the omission of any material fact necessary
to make such information not misleading.

     5.8  USE OF PROCEEDS; MARGIN STOCK. The proceeds of the Loan will be used
by Borrower solely for the purposes specified in SECTION 2.1(d). If requested by
Agent or a Lender, Borrower will from time to time furnish to Agent or Lenders a
statement in conformity with the requirements of Federal Reserve Form U-1
referred to in Regulation U of the Board of Governors of the Federal Reserve
System. No Advance will be used for any purpose which violates, or is
inconsistent with, the Margin Requirements.

     5.9  REPRESENTATIONS AND WARRANTIES. Each Notice of Borrowing (other than a
Notice of Borrowing which requests an Advance that would not increase the
Principal Debt) shall constitute, without the necessity of specifically
containing a written statement, a representation and warranty by Borrower that
no Potential Default or Event of Default exists, and that all representations
and warranties contained in this SECTION 5 or in any other Loan Document are
true and correct on and as of the date the requested Advance is to be made.

     5.10 ACQUIRED STOCK. Borrower's acquisition of the Acquired Stock, pursuant
to the June Option Agreement, complies with all applicable laws, regulations,
agreements (including the Related Agreements), contracts and orders, and is not
subject to, and does not require, the consent or approval of any Person.

     5.11 SHARE OWNERSHIP. After giving effect to Borrower's acquisition of the
Acquired Stock, Borrower's ownership of the Pledged Shares is accurately
described on SCHEDULE 5.11; such SCHEDULE accurately describes the nature of
Borrower's ownership of the Pledged Shares, and the interest (if any) of any
other Person in, or with respect to, the Pledged Shares. SCHEDULE 5.11 also
accurately describes the shares (the "MERGER SHARES") of the capital stock of
AT&T Corp. into which the Pledged Shares would be

                             Page 30 of 112 Pages
<PAGE>
 
converted pursuant to the Merger and the expected interest (if any) of any other
Person in, or with respect to, the Merger Shares. Borrower's rights to pledge,
transfer, or dispose of the Merger Shares will not be restricted by, or subject
to, any agreement, contract, or understanding, except, with respect to Merger
Shares that consist of High Vote Stock, the Related Agreements. Pursuant to the
Merger, the Merger Shares will be issued in a transaction registered under the
Securities Act of 1933, as amended.

     5.12 SURVIVAL OF REPRESENTATIONS AND WARRANTIES.  All representations and
warranties by Borrower herein shall survive delivery of the Notes and the making
of the Loan, and any investigation at any time made by or on behalf of Agent or
any Lender shall not diminish Agent's or Lenders' right to rely thereon.

SECTION 6  COVENANTS.  Until full payment and performance of all obligations of
Borrower under the Loan Documents, Borrower will:

     6.1  FINANCIAL STATEMENTS. Furnish to Agent, or cause to be furnished to
     Agent:

     (a)  Annual financial statements of Borrower within 30 days after the
     anniversary date of the most recent financial statement provided to Agent,
     in form and substance satisfactory to Agent, and including a listing of all
     assets and liabilities, a listing of all sources of income, a listing of
     the uses of income, the amount and sources of contingent liabilities, and
     identification of joint or community owners as to listed assets.

     (b)  A Compliance Certificate for Borrower, concurrently with and dated as
     of the date of delivery of each financial statement as required by this
     SECTION 6.1, stating: "This financial statement is being submitted to
     NationsBank, N.A., Agent, for the purpose of obtaining credit and
     constitutes the true and correct statement of my/our financial condition."
     The certification must be executed and dated by Borrower.

     (c)  Promptly following Agent's reasonable request, which request (whether
     one or more) may be made from time to time, additional information,
     reports, and statements respecting the financial condition of Borrower.

     6.2  COMPLIANCE.  Maintain Borrower's compliance with all Governmental
Requirements applicable to Borrower or to any of Borrower's property,  including
the Collateral, business operations, and transactions.

     6.3  ADVERSE CONDITIONS OR EVENTS. Promptly advise Agent in writing of (a)
any condition, event or act which comes to Borrower's attention that would or
might materially adversely affect Borrower's financial condition, the
Collateral, or Lenders' rights under the Loan Documents; (b) any litigation
filed by or against Borrower which could reasonably be expected to have a
Material Adverse Effect; (c) any default under the Loan Documents; and (d) any
default under the Related Agreements or any agreement, mortgage, indenture, or
contract binding on Borrower which could reasonably be expected to have a
Material Adverse Effect, or any such default which affects the Collateral.

     6.4  TAXES AND OTHER OBLIGATIONS. File on a timely basis all tax returns,
and pay all of Borrower's taxes and other obligations as the same become due and
payable, except to the extent being contested in good faith by appropriate
proceedings.

     6.5  TRANSFER OF ASSETS. Not sell, lease, assign, transfer or otherwise
dispose of assets, during

                             Page 31 of 112 Pages
<PAGE>
 
the term of this Agreement, having an aggregate value in excess of $300,000,000.

     6.6  LIENS. Not grant, suffer, or permit any Lien on any Collateral, except
in favor of Lenders; or take any action (including entering into any agreement
or amending any Related Agreement or other agreement) which would adversely
affect or impair Lenders' Liens in Collateral or right to dispose of Collateral
following an Event of Default; or fail to promptly pay when due all lawful
claims, whether for labor, materials, or otherwise.

     6.7  OTHER COVENANTS.  Not violate or fail to comply with any covenants or
agreements regarding other indebtedness which could reasonably be expected to
have a Material Adverse Effect.

     6.8  INDEMNITY BY BORROWER. Indemnify, defend, and hold harmless Agent,
each Lender, and their respective directors, officers, agents, attorneys, and
employees (individually, an "INDEMNITEE" and collectively, the "INDEMNITEES")
from and against any and all loss, liability, damage, judgment, claim, and
expense (including attorneys' fees and amounts paid in settlement) to which the
Indemnitees may become subject arising out of this Agreement and the other Loan
Documents, the business of Borrower, or the use of proceeds of the Loan, other
than those which arise by reason of the gross negligence or willful misconduct
of Lenders. This indemnification shall survive the satisfaction and payment of
the Obligation and termination of this Agreement.

     6.9  REMOVAL OF LEGENDS.  In the event Lenders decide to foreclose upon or
dispose of the Pledged Shares, use commercially reasonable efforts (subject to
the requirements of applicable Law) to assist Lender in expeditiously removing
any legends on the Pledged Shares that consist of Low Vote Stock which, in
Lenders' sole judgment, would or could delay Lenders' foreclosure upon or
disposition of such Pledged Shares.

     6.10 AMENDMENT TO TCI CHARTER.  Without the written consent of Lenders,
vote against any amendment to TCI's Restated Certificate of Incorporation, as
amended, that would modify the conversion rights or adversely affect the other
rights of any holder of any Pledged Shares; provided that the foregoing shall
not restrict Borrower from voting (a) in accordance with the Voting Agreement
(as it may be amended from time to time, so long as such amendment is in
accordance with the terms of the Loan Documents), or (b) in favor of amendments
to the Restated Certificate of Incorporation relating to a combination of TCI
Ventures Group and Liberty Media Group and reclassification of TCI Ventures
Group Common Stock into Liberty Media Group Common Stock.

SECTION 7  EVENTS OF DEFAULT.

     7.1  EVENTS OF DEFAULT. An "EVENT OF DEFAULT" shall exist if any one or
more of the following events (herein collectively called "EVENTS OF DEFAULT")
shall occur and be continuing:

          (a)  Borrower shall fail to pay when due the Obligation or any part
     thereof; and solely with respect to payments of interest on the Notes, such
     failure or refusal continues for three Business Days;

          (b)  any representation or warranty made under this Agreement, or any
     of the other Loan Documents, shall prove to be untrue or inaccurate in any
     material respect as of the date on which such representation or warranty is
     made;

          (c)  default shall occur in the performance of any of the covenants or
     agreements of 

                             Page 32 of 112 Pages
<PAGE>
 
     Borrower contained herein (other than SECTION 7.1(A)), or in any of the
     other Loan Documents, which default is not remedied within 10 days after
     written notice thereof to Borrower from Lender; provided, that such 10 day
     grace period shall not apply to covenants and agreements contained in
     ARTICLE 2, or SECTIONS 6.3, 6.5, or 6.6 of this Agreement, or in the Pledge
     Agreement, or in the Rule 144 Rider attached to the Pledge Agreement;

          (d)  an "Event of Default" under the Pledge Agreement (as defined
     therein) shall occur;

          (e)  default shall occur in the payment of the unpaid balance of, or
     any installment of principal or interest of, indebtedness of Borrower
     (other than the Obligation) having an aggregate principal balance exceeding
     the sum of $1,000,000, or default shall occur in respect of any note or
     credit agreement relating to any such indebtedness and such default shall
     continue for more than the period of grace, if any, specified therein the
     effect of which is to cause, or to permit any holder of such indebtedness
     to cause (whether or not such holder elects to cause) any of that
     indebtedness to become due before its stated maturity;

          (f)  any of the Loan Documents shall cease to be legal, valid, and
     binding agreements enforceable against the Person executing the same in
     accordance with its terms, shall be terminated, become or be declared
     ineffective or inoperative or cease to provide the respective liens,
     security interests, rights, titles, interests, remedies, powers or
     privileges intended to be provided thereby;

          (g)  Borrower shall (i) apply for or consent to the appointment of a
     receiver, trustee, custodian, intervenor, or liquidator of himself or of
     all or a substantial part of Borrower's assets, (ii) file a voluntary
     petition in bankruptcy, admit in writing that Borrower is unable to pay
     Borrower's debts as they become due or generally not pay Borrower's debts
     as they become due, (iii) make a general assignment for the benefit of
     creditors, (iv) file a petition or answer seeking reorganization of an
     arrangement with creditors or to take advantage of any bankruptcy or
     insolvency laws, (v) file an answer admitting the material allegations of,
     or consent to, or default in answering, a petition filed against Borrower
     in any bankruptcy, reorganization, or insolvency proceeding, or (vi) take
     any action for the purpose of effecting any of the foregoing;

          (h)  An involuntary proceeding shall be commenced against Borrower
     seeking bankruptcy or reorganization of Borrower or the appointment of a
     receiver, custodian, trustee, liquidator, or other similar official of
     Borrower, or all or substantially all of Borrower's assets, and such
     proceeding shall not have been dismissed within 60 days of the filing
     thereof; or an order, order for relief, judgment or decree shall be entered
     by any court of competent jurisdiction or other competent authority
     approving a petition or complaint seeking reorganization of Borrower, or
     appointing a receiver, custodian, trustee, liquidator or other similar
     official of Borrower, or of all or substantially all of Borrower's assets;

          (i)  any final judgment(s) for the payment of money in excess of the
     sum of $1,000,000 in the aggregate shall be rendered against Borrower, and
     such judgment(s) shall not be satisfied or discharged at least 10 days
     prior to the date on which any of Borrower's assets could be lawfully sold
     to satisfy such judgment; or

          (j)  Sixty days after the death of Borrower.

                             Page 33 of 112 Pages
<PAGE>
 
     7.2  Remedies Upon Event of Default. If any Event of Default shall occur,
Agent may, at the request of the Required Lenders, without notice, exercise any
one or more of the following rights and remedies, and any other remedies
provided in any of the Loan Documents, as Agent, at the request of Required
Lenders, in their discretion may deem necessary or appropriate: (a) terminate
the commitment to lend hereunder, (b) declare the Obligation, or any part
thereof, to be forthwith due and payable, whereupon the same shall forthwith
become due and payable without presentment, demand, protest, notice of default,
notice of acceleration or of intention to accelerate, or other notice of any
kind, all of which Borrower hereby expressly waives, anything contained herein
or in the Notes to the contrary notwithstanding, (c) reduce any claim to
judgment, or (d) without notice of default or demand, pursue and enforce any of
Agent's or Lenders' rights and remedies under the Loan Documents, or otherwise
provided under or pursuant to any applicable law or agreement; provided,
however, that if any Event of Default specified in Sections 7.1(g) or (h) shall
occur, the Obligation shall thereupon become due and payable concurrently
therewith, and Lenders' obligation to lend shall immediately terminate
hereunder, without any further action by Agent or Lenders and without
presentment, demand, protest, notice of default, notice of acceleration or of
intention to accelerate, or other notice of any kind, all of which Borrower
hereby expressly waives.

     7.3  Performance by Agent. Should Borrower fail to perform any covenant,
duty, or agreement contained in any of the Loan Documents, Agent may perform or
attempt to perform such covenant, duty, or agreement on behalf of Borrower. In
such event, Borrower shall, at the request of Agent, promptly pay any amount
expended by Agent in such performance or attempted performance to Agent at its
principal office in Dallas, Texas, together with interest thereon at the Maximum
Rate from the date of such expenditure until paid. Notwithstanding the
foregoing, it is expressly understood that Agent shall not assume any liability
or responsibility for the performance of any duties of Borrower hereunder or
under any of the Loan Documents, and none of the covenants or other provisions
contained in this Agreement shall, or shall be deemed to, give Agent the right
or power to exercise control over the management and affairs of Borrower.

     7.4  Conversion and Voting Provisions.  Neither Lenders nor Agent nor their
respective nominees shall sell or dispose of Pledged Shares consisting of High
Vote Stock without first having such Pledged Shares converted into Low Vote
Stock.  If Lenders or Agent or their respective nominees become the record and
beneficial owner(s) of Pledged Shares consisting of High Vote Stock and are
entitled to vote such Pledged Shares in connection with the Merger, then Lenders
or Agent or their respective nominees shall vote such Pledged Shares (a) in the
case of any matter covered by the Voting Agreement, in accordance with
Borrower's voting obligations under the Voting Agreement or (b) in the case of
any other matter, in the manner recommended by the Board of Directors of TCI.

SECTION 8  THE AGENT.

     8.1  The Agent.

     (a)  Appointment. Each Lender appoints Agent (including each successor
Agent in accordance with this Section 8) as its nominee and agent to act in its
name and on its behalf (and Agent and each such successor accepts that
appointment): (i) to act as its nominee and on its behalf in and under all Loan
Documents; (ii) to arrange the means whereby its funds are to be made available
to Borrower under the Loan Documents; (iii) to take any action that it properly
requests under the Loan Documents (subject to the concurrence of other Lenders
as may be required under the Loan Documents); (iv) to receive all documents and
items to be furnished to it under the Loan Documents; (v) to be the secured
party, mortgagee, beneficiary, recipient, and similar party in respect of any
Collateral, for the benefit of 

                             Page 34 of 112 Pages
<PAGE>
 
Lenders; (vi) to promptly distribute to it all financial statements, compliance
certificates, notices received hereunder, and other items specifically required
to be delivered to it hereunder, and, upon request, such other material
information, requests, documents, and items received under the Loan Documents;
(vii) to promptly distribute to it its Pro Rata Part of each payment or
prepayment (whether voluntary, as proceeds of Collateral upon or after
foreclosure, as proceeds of insurance thereon, or otherwise) in accordance with
the terms of the Loan Documents; and (viii) to deliver to the appropriate
Persons requests, demands, approvals, and consents received from it. However,
Agent may not be required to take any action that exposes it to personal
liability or that is contrary to any Loan Document or applicable Governmental
Requirement.

     (b)  Successor. Agent may assign all of its rights and obligations as Agent
under the Loan Documents to any of its Affiliates, which Affiliate shall then be
the successor Agent under the Loan Documents. Agent may also voluntarily resign
by notice to Borrower and Lenders, and shall resign upon the request of the
Required Lenders for cause. If the initial or any successor Agent ever ceases to
be a party to this Agreement or if the initial or any successor Agent ever
resigns (whether voluntarily or at the request of the Required Lenders), then
the Required Lenders shall (which, if no Potential Default or Event of Default
exists, is subject to Borrower's approval that may not be unreasonably withheld)
appoint the successor Agent from among Lenders (other than the resigning Agent).
If the Required Lenders fail to appoint a successor Agent within 30 days after
the resigning Agent has given notice of resignation or the Required Lenders have
removed the resigning Agent, then the resigning Agent may, on behalf of Lenders,
appoint a successor Agent (which, if no Potential Default or Event of Default
exists, is subject to Borrower's approval that may not be unreasonably
withheld), which must be a commercial bank having a combined capital and surplus
of at least $1,000,000,000 (as shown on its most recently published statement of
condition) and whose debt obligations (or whose parent's debt obligations) are
rated not less than Baa1 by Moody's or BBB+ by S & P. Upon its acceptance of
appointment as successor Agent, the successor Agent succeeds to and becomes
vested with all of the rights, duties, and responsibilities of the prior Agent,
and the prior Agent is discharged from its duties and obligations of the Agent
under the Loan Documents, and each Lender shall execute the documents that any
Lender, the resigning or removed Agent, or the successor Agent reasonably
request to reflect the change. After any Agent's resignation or removal as Agent
under the Loan Documents, the provisions of this Section inure to its benefit as
to any actions taken or not taken by it while it was the Agent under the Loan
Documents.

     (c)  Rights as Lender. Agent, in its capacity as a Lender, has the same
rights under the Loan Documents as any other Lender and may exercise those
rights as if it were not acting as an Agent. The term "Lender," unless the
context otherwise indicates, includes the Agent. Agent's resignation or removal
does not impair or otherwise affect any rights that it has or may have in its
capacity as an individual Lender. Each Lender and Borrower agree Agent is not a
fiduciary for Lenders or for Borrower but is simply acting in the capacity
described in this Agreement to alleviate administrative burdens for Borrower and
Lenders, that Agent has no duties or responsibilities to Lenders or Borrower
except those expressly set forth in the Loan Documents, and that Agent in its
capacity as a Lender has the same rights as any other Lender.

     (d)  Other Activities. Agent or any Lender may now or in the future be
engaged in one or more loan, letter of credit, leasing, or other financing
transactions with Borrower, act as trustee or depositary for Borrower, or
otherwise be engaged in other transactions with Borrower (collectively, the
"other activities") not the subject of the Loan Documents. Without limiting the
rights of Lenders specifically set forth in the Loan Documents, neither Agent
nor any Lender is responsible to account to the other Lenders for those other
activities, and no Lender shall have any interest in any other Lender's
activities, any present or future guaranties by or for the account of Borrower
that are not contemplated by 

                             Page 35 of 112 Pages
<PAGE>
 
or included in the Loan Documents, any present or future offset exercised by
Agent or any Lender in respect of those other activities, any present or future
property taken as security for any of those other activities, or any property
now or hereafter in Agent's or any other Lender's possession or control that may
be or become security for the obligations of Borrower arising under the Loan
Documents by reason of the general description of indebtedness secured or of
property contained in any other agreements, documents, or instruments related to
any of those other activities (but, if any payments in respect of those
guaranties or that property or the proceeds thereof is applied by Agent or any
Lender to reduce the Obligation, then each Lender is entitled to share ratably
in the application as provided in the Loan Documents).

     (e)  Additional Pledged Shares. The Pledge Agreement contemplates that,
under certain circumstances, Borrower may provide additional, or substituted,
Collateral as security for the Obligation. Without the prior written or oral
approval of (i) Lenders whose aggregate Pro Rata Parts equal at least 67% of the
Commitment, for Collateral in the categories described in Section 6.B. clauses
i, ii, iii, and iv of the Pledge Agreement, and (ii) all Lenders, for Collateral
in the category described in Section 6.B. clause v of the Pledge Agreement,
Agent shall not approve as satisfactory additional or substitute Collateral,
unless such Collateral consists of shares of common stock of the same series and
issue as the Collateral. This paragraph (e) shall not prevent Borrower's pledge,
or Agent's acceptance, of shares of Permitted Classes. Each Lender authorizes
and directs Agent, without further consent or request of Lenders, to take such
actions (including release of Collateral) as may reasonably be required to
tender Pledged Shares in compliance with Section 6.D.ii of the Pledge Agreement.

     8.2  Expenses.  Should Agent commence any proceeding or in any way seek to
enforce its rights under the Loan Documents, irrespective of whether as a result
thereof Agent shall acquire title to any Collateral, either through foreclosure,
deed in lieu of foreclosure, or otherwise, each Lender, upon demand therefor
from time to time, shall contribute its share (based on its Pro Rata Part) of
the reasonable costs and/or expenses of any such enforcement or acquisition,
including fees of receivers or trustees, court costs, title company charges,
filing and recording fees, appraisers' fees, and fees and expenses of attorneys
to the extent not otherwise reimbursed by Borrower.  Without limiting the
generality of the foregoing, each Lender shall contribute its share (based on
its Pro Rata Part) of all reasonable costs and expenses incurred by Agent
(including reasonable attorneys' fees and expenses) if Agent employs counsel for
advice or other representation (whether or not any suit has been or shall be
filed) with respect to any Collateral or any part thereof, or any of the Loan
Documents, or the attempt to enforce any Lien in any of the Collateral, or to
enforce any rights of Agent or any of Borrower's obligations under any of the
Loan Documents, but not with respect to any dispute between Agent and any other
Lender(s).  Any loss of principal and interest resulting from any Potential
Default or Event of Default shall be shared by Lenders in accordance with their
respective Pro Rata Parts.  It is understood and agreed that if Agent determines
that it is necessary to engage counsel for Lenders from and after the occurrence
of a Potential Default or an Event of  Default, then said counsel shall be
selected by Agent and written notice of the same shall be delivered to Lenders.

     8.3  Proportionate Absorption of Losses. Except as otherwise provided in
the Loan Documents, nothing in the Loan Documents gives any Lender any advantage
over any other Lender insofar as the Obligation is concerned or relieves any
Lender from ratably absorbing any losses sustained with respect to the
Obligation (except to the extent unilateral actions or inactions by any Lender
result in Borrower or any other obligor on the Obligation having any credit,
allowance, setoff, defense, or counterclaim solely with respect to all or any
part of that Lender's Pro Rata Part of the Obligation).

     8.4  Delegation of Duties; Reliance. Lenders may perform any of their
duties or exercise any

                             Page 36 of 112 Pages
<PAGE>
 
of their rights under the Loan Documents by or through Agent, and Lenders and
Agent may perform any of their duties or exercise any of their rights under the
Loan Documents by or through their respective officers, agents, or other
representatives. Agent, Lenders, and their respective officers, agents, or other
representatives (a) are entitled to rely upon (and shall be protected in relying
upon) any written or oral statement believed by it or them to be genuine and
correct and to have been signed or made by the proper Person and, with respect
to legal matters, upon opinion of counsel selected by Agent or that Lender (but
nothing in this clause (a) permits Agent to rely on (i) oral statements if a
writing is required by this Agreement or (ii) any other writing if a specific
writing is required by this Agreement), (b) are entitled to deem and treat each
Lender as the owner and holder of its portion of the Obligation for all purposes
until, written notice of the assignment or transfer is given to and received by
Agent (and any request, authorization, consent, or approval of any Lender is
conclusive and binding on each subsequent holder, assignee, or transferee of or
participant in that Lender's portion of the Obligation until that notice is
given and received), (c) are not deemed to have notice of the occurrence of a
Potential Default or Event of Default unless a responsible officer of Agent, who
handles matters associated with the Loan Documents and transactions thereunder,
has actual knowledge or Agent has been notified by a Lender or Borrower, and (d)
are entitled to consult with legal counsel (including counsel for Borrower),
independent accountants, and other experts selected by Agent and are not liable
for any action taken or not taken in good faith by it in accordance with the
advice of counsel, accountants, or experts.

     8.5  Limitation of Agent's Liability.

     (a)  Exculpation. Neither Agent nor any of its Affiliates or their
respective officers, agents, or other representatives will be liable for any
action taken or omitted to be taken by it or them under the Loan Documents in
good faith and believed by it or them to be within the discretion or power
conferred upon it or them by the Loan Documents or be responsible for the
consequences of any error of judgment (except for fraud, gross negligence, or
willful misconduct), and neither Agent nor any of its Affiliates or their
respective officers, agents, or other representatives has a fiduciary
relationship with any Lender by virtue of the Loan Documents (but nothing in
this Agreement negates the obligation of Agent to account for funds received by
it for the account of any Lender).

     (b)  Indemnity. Unless indemnified to its satisfaction against loss, cost,
liability, and expense, Agent may not be compelled to do any act under the Loan
Documents or to take any action toward the execution or enforcement of the
powers thereby created or to prosecute or defend any suit in respect of the Loan
Documents. If Agent requests instructions from Lenders, or the Required Lenders,
as the case may be, with respect to any act or action in connection with any
Loan Document, then Agent is entitled to refrain (without incurring any
liability to any Person by so refraining) from that act or action unless and
until it has received instructions. In no event, however, may Agent or any of
its officers, agents, or other representatives be required to take any action
that it or they determine could incur for it or them criminal or onerous civil
liability. Without limiting the generality of the foregoing, no Lender has any
right of action against Agent as a result of Agent's acting or refraining from
acting under this Agreement in accordance with instructions of the Required
Lenders.

     (c)  Reliance. Agent is not responsible to any Lender or any participant
for, and each Lender represents and warrants that it has not relied upon any
Agent in respect of, (i) the creditworthiness of Borrower and the risks involved
to that Lender, (ii) the effectiveness, enforceability, genuineness, validity,
or the due execution of any Loan Document (except by Agent), (iii) any
representation, warranty, document, certificate, report, or statement made
therein (except by Agent) or furnished thereunder or in connection therewith,
(iv) the adequacy of any Collateral now or hereafter securing the Obligation or
the existence, priority, or perfection of any Lien now or hereafter granted or
purported to be granted on the 

                             Page 37 of 112 Pages
<PAGE>
 
Collateral under any Loan Document, or (v) observation of or compliance with any
of the terms, covenants, or conditions of any Loan Document on the part of
Borrower. EACH LENDER AGREES TO INDEMNIFY AGENT AND ITS OFFICERS, AGENTS, AND
OTHER REPRESENTATIVES AND HOLD THEM HARMLESS FROM AND AGAINST (BUT LIMITED TO
SUCH LENDER'S PRO RATA PART) ANY AND ALL LIABILITIES, OBLIGATIONS, LOSSES,
DAMAGES, PENALTIES, ACTIONS, JUDGMENTS, SUITS, COSTS, REASONABLE EXPENSES, AND
REASONABLE DISBURSEMENTS OF ANY KIND OR NATURE WHATSOEVER THAT MAY BE IMPOSED
ON, ASSERTED AGAINST, OR INCURRED BY THEM IN ANY WAY RELATING TO OR ARISING OUT
OF THE LOAN DOCUMENTS OR ANY ACTION TAKEN OR OMITTED BY THEM UNDER THE LOAN
DOCUMENTS IF SUCH AGENT AND ITS OFFICERS, AGENTS OR OTHER REPRESENTATIVES ARE
NOT REIMBURSED FOR SUCH AMOUNTS BY BORROWER; THE FOREGOING INDEMNIFICATION OF
AGENT AND ITS OFFICERS, AGENTS, AND OTHER REPRESENTATIVES INCLUDES THE RIGHT TO
BE INDEMNIFIED UNDER THIS AGREEMENT FOR ITS OR THEIR OWN ORDINARY NEGLIGENCE,
BUT AGENT AND ITS OFFICERS, AGENTS, AND OTHER REPRESENTATIVES DO NOT HAVE THE
RIGHT TO BE INDEMNIFIED UNDER THIS AGREEMENT FOR ITS OR THEIR OWN FRAUD, GROSS
NEGLIGENCE, OR WILLFUL MISCONDUCT.

     8.6  Default.  While an Event of Default exists, Lenders agree to promptly
confer in order that the Required Lenders or Lenders, as the case may be, may
agree upon a course of action for the enforcement of the rights of Lenders.
Agent is entitled to act or refrain from taking any action (without incurring
any liability to any Person for so acting or refraining) unless and until it has
received instructions from Required Lenders or all Lenders, as the case may be.
In actions with respect to any of Borrower's property, Agent is acting for the
ratable benefit of each Lender.

     8.7  Collateral Matters.

     (a)  Each Lender authorizes and directs Agent to enter into the Loan
Documents and agrees that any action taken by Agent concerning any Collateral
(with the consent or at the request of the Required Lenders) in accordance with
any Loan Document, that Agent's exercise (with the consent or at the request of
the Required Lenders) of powers concerning the Collateral in any Loan Document,
and that all other reasonably incidental powers are authorized and binding upon
all Lenders.

     (b)  Agent is authorized on behalf of all Lenders, without the necessity of
any notice to or further consent from any Lender, from time to time before a
Potential Default or Event of Default, to take any action with respect to any
Collateral or Loan Documents related to Collateral that may be necessary to
perfect and maintain Agent's Liens in the Collateral.

     (c)  Except to use the same standard of care that it ordinarily uses for
collateral for its sole benefit, Agent has no obligation whatsoever to any
Lender or to any other Person to assure that the Collateral exists or is owned
by Borrower or is cared for, protected, or insured or has been encumbered or
that Agent's Liens have been properly or sufficiently or lawfully created,
perfected, protected, or enforced or are entitled to any particular priority.

     (d)  Agent shall exercise the same care and prudent judgment with respect
to the Collateral and the Loan Documents as it normally and customarily
exercises in respect of similar collateral and security documents. 

     8.8  Limitation of Liability. No Lender or any Participant will incur any
liability to any other Lender or Participant except for acts or omissions in bad
faith, and neither Agent nor any Lender or Participant will incur any liability
to any other Person for any act or omission of any other Lender or any

                             Page 38 of 112 Pages
<PAGE>
 
Participant.

     8.9   Relationship of Lenders. The Loan Documents do not create a
partnership or joint venture among Agent and Lenders or among Lenders.

     8.10  Benefits of Agreement. None of the provisions of this Section inure
to the benefit of Borrower or any other Person except Agent and Lenders.
Therefore, neither Borrower nor any other Person is responsible or liable for,
entitled to rely upon, or entitled to raise as a defense -- in any manner
whatsoever -- the failure of Agent or any Lender to comply with these
provisions.

SECTION 9  MISCELLANEOUS.

     9.1 Accounting Reports. All financial reports or projections furnished by
any Person to Agent and Lenders pursuant to this Agreement shall be prepared in
such form and such detail as shall be satisfactory to Agent and shall be
prepared on the same basis as those prepared by such Person in prior years .

     9.2  Waiver.  No failure to exercise, and no delay in exercising, on
the part of Agent or Lenders, any right hereunder shall operate as a waiver
thereof, nor shall any single or partial exercise thereof preclude any other or
further exercise thereof or the exercise of any other right.  The rights of
Agent and Lenders under the Loan Documents shall be in addition to all other
rights provided by law.  No modification or waiver of any provision of any Loan
Document, nor consent to departure therefrom, shall be effective unless in
writing, and no such consent or waiver shall extend beyond the particular case
and purpose involved.  No notice or demand given in any case shall constitute a
waiver of the right to take other action in the same, similar, or other
instances without such notice or demand.

     9.3  Payment of Expenses. Borrower hereby agrees to pay on demand: (a) all
reasonable costs and expenses of Agent in connection with the preparation,
negotiation, execution, and delivery of this Agreement and the other Loan
Documents including the reasonable legal fees and expenses of legal counsel for
Agent; (b) all reasonable costs and expenses of Agent in connection with any and
all amendments, modifications, renewals, extension, and supplements of any of
the Loan Documents; (c) all reasonable costs and expenses of Agent and Lenders
in connection with any Event of Default and the enforcement of this Agreement or
any other Loan Document, including the fees and expenses of legal counsel for
Agent and Lenders; (d) all transfer, stamp, documentary, or other similar taxes,
assessments, or charges levied by any Governmental Authority in respect of this
Agreement or any of the other Loan Documents; (e) all costs, expenses,
assessments, and other charges incurred in connection with any filing,
registration, recording, or perfection of any security interest or Lien
contemplated by this Agreement or any other Loan Document; and (f) all other
reasonable costs and expenses incurred by Agent in connection with this
Agreement or any other Loan Document.

     9.4  Notices.  Any communications required or permitted to be given by
any of the Loan Documents must be (a) in writing and personally delivered or
mailed by prepaid certified or registered mail or by reputable overnight
courier, or (b) made by facsimile transmission delivered or transmitted, to the
party to whom such notice of communication is directed, to the address of such
party shown opposite its name on the signature pages hereof.  Any such
communication shall be deemed to have been given (whether actually received or
not) on the day it is personally delivered or, if transmitted by facsimile
transmission, on the day that such communication is transmitted as aforesaid
subject to telephone confirmation of receipt; provided, however, that any notice
received by Agent after 1:00 p.m. Dallas, Texas time on any day from Borrower
pursuant to Section 2.2 or 2.3 (with respect to a Notice of 

                             Page 39 of 112 Pages
<PAGE>
 
Borrowing) shall be deemed for the purposes of such section to have been given
by Borrower on the next succeeding day, or if mailed, on the third day after it
is marked as aforesaid. Any party may change its address for purposes of this
Agreement by giving notice of such change to the other parties pursuant to this
Section 9.4.

     9.5  Governing Law. This Agreement has been prepared, is being executed and
delivered, and is intended to be performed in the State of Texas, and the
substantive laws of such state and the applicable federal laws of the United
States of America shall govern the validity, construction, enforcement, and
interpretation of this Agreement, the Notes, and all of the other Loan
Documents.

     9.6  Choice of Forum; Consent to Service of Process and Jurisdiction. Any
suit, action, or proceeding against Borrower with respect to this Agreement, the
Notes, or any judgment entered by any court in respect thereof, may be brought
in the courts of the State of Texas, County of Dallas, or in the United States
courts located in the State of Texas, as Agent and Lenders in their sole
discretion may elect and Borrower hereby irrevocably submits to the nonexclusive
jurisdiction of such courts for the purpose of any such suit, action, or
proceeding .

     9.7  Invalid Provisions. Any provision of any Loan Document held by a court
of competent jurisdiction to be illegal, invalid, or unenforceable shall not
invalidate the remaining provisions of such Loan Document, which shall remain in
full force, and the effect thereof shall be confined to the provision held
invalid or illegal.

     9.8  Maximum Interest Rate.  Regardless of any provision contained in
any of the Loan Documents, neither Agent nor any Lender shall ever be entitled
to receive, collect, or apply as interest on the Notes any amount in excess of
interest calculated at the Maximum Rate, and, in the event that any Agent or any
Lender ever receives, collects, or applies as interest any such excess, the
amount which would be excessive interest shall be deemed to be a partial
prepayment of principal, and treated hereunder as such; and, if the principal
amount of the Obligation is paid in full, any remaining excess shall forthwith
be paid to Borrower.  In determining whether or not the interest paid or payable
under any specific contingency exceeds interest calculated at the Maximum Rate,
Borrower and Lenders shall, to the maximum extent permitted under applicable
law, (a) characterize any nonprincipal payment as an expense, fee, or premium,
rather than as interest; (b) exclude voluntary prepayments and the effects
thereof; and (c) amortize, prorate, allocate, and spread, in equal parts, the
total amount of interest throughout the entire contemplated term of the Note;
provided that, if the Notes are paid and performed in full prior to the end of
the full contemplated term thereof, and if the interest received for the actual
period of existence thereof exceeds interest calculated at the Maximum Rate,
Agent and Lenders shall refund to Borrower the amount of such excess, or credit
the amount of such excess against the principal amount of the Notes, and, in
such event, Agent and Lenders shall not be subject to any penalties provided by
any laws for contracting for, charging, taking, reserving, or receiving interest
in excess of interest calculated at the Maximum Rate.

     9.9  Nonliability of Lenders. The relationship between Borrower and Lenders
is, and shall at all times remain, solely that of Borrower and Lenders, and
Lenders have no fiduciary or other special relationship with Borrower.

     9.10  Article 15.10(b). Borrower, Agent, and Lenders hereby agree that,
except for Section 15.10(b) thereof, the provisions of Art. 5069-15.01 et seq.
of the Revised Civil Statutes of Texas, 1925, as amended (regulating certain
revolving credit loans and revolving tri-party accounts) shall not apply to the
Loan Documents.

                             Page 40 of 112 Pages
<PAGE>
 
     9.11 Successors and Assigns.

     (a)  This Agreement shall be binding upon and inure to the benefit of the
parties hereto and their respective successors and assigns. Borrower may not
assign or transfer any of its rights or obligations hereunder without the prior
written consent of Agent and all Lenders. Any purported assignment or transfer
in contravention of this Section shall be null and void. Any Lender may sell
participations to one or more banks or other institutions in or to all or a
portion of its rights and obligations under this Agreement and the other Loan
Documents (including all or a portion of its Commitments and the Advances owing
to it); provided, however, that (i) such Lender's obligations under this
Agreement and the other Loan Documents (including its Commitments) shall remain
unchanged, (ii) such Lender shall remain solely responsible to Borrower for the
performance of such obligations, (iii) such Lender shall remain the holder of
its Notes for all purposes of this Agreement, (iv) Borrower shall continue to
deal solely and directly with such Lender in connection with such Lender's
rights and obligations under this Agreement and the other Loan Documents, and
(v) such Lender shall not sell a participation that conveys to the participant
the right to vote or give or withhold consents under this Agreement or any other
Loan Document, other than the right to vote upon or consent to (A) any increase
of such Lender's Commitments, (B) any reduction of the principal amount of, or
interest to be paid on, the Advances of such Lender, (C) any reduction of any
commitment fee or other amount payable to such Bank under any Loan Document, or
(D) any postponement of any date for the payment of any amount payable in
respect of the Advances of such Lender.

     (b)  Borrower and Lenders agree that any Lender (an "Assigning Lender") may
at any time assign to one or more Eligible Assignees all, or a portion of all,
of its rights and obligations under this Agreement and the other Loan Documents
(including its Commitment and Advances) (each an "Assignee"); provided, however,
that (i) unless Borrower has consented in writing, such consent not to be
unreasonably withheld, the amount of the remaining Commitment of any Assigning
Lender that is also an Agent or Co-Agent shall in no event be less than
$60,000,000, (ii) the parties to each such assignment shall execute and deliver
to Agent for its acceptance and recording in the Register (as defined below), an
Assignment and Acceptance, together with the Note subject to such assignment,
and a processing and recordation fee of $3,000; and (iii) Agent and Borrower
consent to the assignment (and with respect to Borrower, Borrower furnishes
written evidence of its consent to Agent), which consent shall not be
unreasonably withheld. Upon such execution, delivery, acceptance, and recording,
from and after the effective date specified in each Assignment and Acceptance,
which effective date shall be at least five Business Days after the execution
thereof, or, if so specified in such Assignment and Acceptance, the date of
acceptance thereof by Agent, (x) the assignee thereunder shall be a party hereto
as a "Lender" and, to the extent that rights and obligations hereunder have been
assigned to it pursuant to such Assignment and Acceptance, have the rights and
obligations of a Lender hereunder and under the Loan Documents and (y) the
Lender that is an assignor thereunder shall, to the extent that rights and
obligations hereunder have been assigned by it pursuant to such Assignment and
Acceptance, relinquish its rights and be released from its obligations under
this Agreement and the other Loan Documents (and, in the case of an Assignment
and Acceptance covering all or the remaining portion of a Lender's rights and
obligations under the Loan Documents, such Lender shall cease to be a party
thereto).

     (c)  By executing and delivering an Assignment and Acceptance, the
Assigning Lender and its Assignee confirm to and agree with each other and the
other parties hereto as follows: (i) other than as provided in such Assignment
and Acceptance, such Assigning Lender makes no representation or warranty and
assumes no responsibility with respect to any statements, warranties, or
representations made in or in connection with the Loan Documents or the
execution, legality, validity, and enforceability, genuineness, sufficiency, or
value of the Loan Documents or any other instrument or document furnished
pursuant

                             Page 41 of 112 Pages
<PAGE>
 
thereto; (ii) such Assigning Lender makes no representation or warranty and
assumes no responsibility with respect to Borrower of its obligations under the
Loan Documents; (iii) the Assignee confirms that it has received copies of the
Loan Documents, together with copies of the financial statements referred to in
Section 5.7 and such other documents and information as it has deemed
appropriate to make its own credit analysis and decision to enter into such
Assignment and Acceptance; (iv) the Assignee will, independently and without
reliance upon Agent or such assignor and based on such documents and information
as it shall deem appropriate at the time, continue to make its own credit
decisions in taking or not taking action under this Agreement and the other Loan
Documents; (v) the Assignee confirms that it is an Eligible Assignee; (vi) the
Assignee appoints and authorizes Agent to take such action as Agent on its
behalf and exercise such powers under the Loan Documents as are delegated to
Agent by the terms thereof, together with such powers as are reasonably
incidental thereto; and (vii) the Assignee agrees that it will perform in
accordance with their terms all of the obligations which by the terms of the
Loan Documents are required to be performed by it as a Lender.

     (d)  Agent shall maintain at its principal office a copy of each Assignment
and Acceptance delivered to and accepted by it and a register for the
recordation of the names and addresses of Lenders and the Commitment of, and
principal amount of the Advances owing to, each Lender from time to time (the
"Register"). The entries in the Register shall be conclusive and binding for all
purposes, absent manifest error, and Borrower, Agent, and Lenders may treat each
Person whose name is recorded in the Register as a Lender hereunder for all
purposes under the Loan Documents. The Register shall be available for
inspection by Borrower or any Lender at any reasonable time and from time to
time upon reasonable prior notice.

     (e)  Upon its receipt of an Assignment and Acceptance executed by an
Assigning Lender and Assignee representing that it is an Eligible Assignee (or
other assignee permitted hereunder), together with any Note subject to such
assignment, Agent shall, if such Assignment and Acceptance has been completed
and is in substantially the form of Exhibit A, (i) accept such Assignment and
Acceptance, (ii) record the information contained therein in the Register, and
(iii) give prompt written notice thereof to Borrower. Within five Business Days
after its receipt of such notice, Borrower shall execute and deliver to Agent in
exchange for the surrendered Note a new Note to the order of such Eligible
Assignee (or other assignee permitted hereunder) in an amount equal to the
portion of the Commitments assumed by it pursuant to such Assignment and
Acceptance and, if the Assigning Lender has retained a portion of the
Commitments, a new Note to the order of the Assigning Lender in an amount equal
to the portion of the Commitments retained by it hereunder (each such promissory
note shall constitute a "Note" for purposes of the Loan Documents). Such new
Notes shall be in an aggregate principal amount of the surrendered Note, shall
be dated the effective date of such Assignment and Acceptance, and shall
otherwise be in substantially the form of Exhibit B.

     (f)  Any Lender may, in connection with any assignment or participation or
proposed assignment or participation pursuant to this Section, disclose to the
Assignee or participant or proposed Assignee or participant, any information
relating to Borrower furnished to such, Lender by or on behalf of Borrower,
subject to the confidentiality requirements in Section 9.19.

     (g)  Notwithstanding any other term of this Agreement to the contrary, any
Lender may (without requesting the consent of either Agent or Borrower) pledge
its Note to a Federal Reserve Bank in support of borrowings made by such Lender
from such Federal Reserve Bank.

     (h)  Notwithstanding any other term of this Agreement to the contrary, any
          Lender may assign 

                             Page 42 of 112 Pages
<PAGE>
 
all, or a portion of all, of its rights and obligations under this Agreement and
the other Loan Documents (including its Commitment and Advances) to an Affiliate
of such Lender or any other Lender, provided that:

          (i)  such assignor Lender has obtained the written consent of Agent
     (which consent shall not be unreasonably delayed or withheld) if the effect
     of such assignment or delegation shall entitle such Affiliate or other
     Lender to claim compensation from Borrower pursuant to Section 2.6 and
     Exhibit D; and

          (ii) in every other case, such assignor Lender has furnished notice
     to, but not obtained the consent of, Agent.

     9.12  Entirety. THIS AGREEMENT, THE NOTES, AND THE OTHER LOAN DOCUMENTS
REFERRED TO HEREIN EMBODY THE FINAL, ENTIRE AGREEMENT AMONG THE PARTIES HERETO,
AND SUPERSEDE ANY AND ALL PRIOR COMMITMENTS, AGREEMENTS, REPRESENTATIONS, AND
UNDERSTANDINGS, WHETHER WRITTEN OR ORAL, RELATING TO THE SUBJECT MATTER HEREOF,
AND MAY NOT BE CONTRADICTED OR VARIED BY EVIDENCE OF PRIOR, CONTEMPORANEOUS, OR
SUBSEQUENT ORAL AGREEMENTS OR DISCUSSIONS OF THE PARTIES HERETO. THERE ARE NO
ORAL AGREEMENTS AMONG THE PARTIES HERETO. THE PROVISIONS OF THIS AGREEMENT AND
THE OTHER LOAN DOCUMENTS TO WHICH BORROWER IS A PARTY MAY BE AMENDED OR WAIVED
ONLY BY AN INSTRUMENT IN WRITING, SIGNED BY THE PARTIES HERETO.

     9.13  Headings.  Section headings are for convenience of reference
only, and shall in no way affect the interpretation of this Agreement.

     9.14  Survival.  All representations and warranties made by Borrower
herein shall survive delivery of the Note and the making of the Loan.

     9.15  Amendments, Etc.  No amendment or waiver of any provision of
this Agreement, the Notes, or any other Loan Document to which Borrower is a
party, nor any consent to any departure by Borrower therefrom, shall in any
event be effective unless the same shall be agreed or consented to by the
Required Lenders and Borrower, and each such waiver or consent shall be
effective only in the specific instance and for the specific purpose for which
given; provided, that no amendment, waiver, or consent shall, unless in writing
and signed by all of Lenders and Borrower, do any of the following: (a) increase
Commitments of Lenders or subject Lenders to any additional obligations; (b)
reduce the principal of, or interest on, the Notes or any fees or other amounts
payable to Lenders (but not Agent) hereunder; (c) postpone any date fixed for
any payment of principal of, or interest on, the Notes or any fees or other
amounts payable to Agent or Lenders hereunder; (d) change the percentage of the
Commitments or of the aggregate unpaid principal amount of the Notes or the
number of Lenders which shall be required for Lenders or any of them to take any
action under this Agreement; (e) change any provision contained in Section
2.1(c), this Section 9.15, or Section 6 of the Pledge Agreement; or (f) release
any portion of the Collateral, except in accordance with the relevant Loan
Document.  Notwithstanding anything to the contrary contained in this Section,
no amendment, waiver, or consent shall be made with respect to Section 8 without
the prior written consent of Agent.

     9.16  No Third Party Beneficiary. The parties do not intend the benefits of
this Agreement to inure to any third party, nor shall any Loan Document or any
course of conduct by any party hereto be construed to make or render Agent or
Lenders, or any of their officers, directors, agents, or employees 

                             Page 43 of 112 Pages
<PAGE>
 
liable (i) to any materialman, supplier, contractor, subcontractor, purchaser or
lessee of any property owned by Borrower, or (ii) for debts or claims accruing
to any such Persons against Borrower.

     9.17  WAIVER OF JURY TRIAL. TO THE FULLEST EXTENT PERMITTED BY APPLICABLE
LAW, BORROWER HEREBY IRREVOCABLY AND EXPRESSLY WAIVES ALL RIGHT TO A TRIAL BY
JURY IN ANY ACTION, PROCEEDING, OR COUNTERCLAIM (WHETHER BASED UPON CONTRACT,
TORT, OR OTHERWISE) ARISING OUT OF, OR RELATING TO ANY OF THE LOAN DOCUMENTS OR
THE TRANSACTIONS CONTEMPLATED THEREBY OR THE ACTIONS OF LENDER IN THE
NEGOTIATION, ADMINISTRATION, OR ENFORCEMENT THEREOF.

     9.18  Multiple Counterparts.  This Agreement may be executed in any
number of counterparts, all of which taken together shall constitute one and the
same agreement, and any of the parties hereto may execute this Agreement by
signing any such counterpart.

     9.19  Confidentiality; No Publication.  Subject to Sections 9.11 and
9.16, Agent and Lenders (a) shall hold all nonpublic information (the "nonpublic
information") obtained pursuant to the requirements of this Agreement in
confidence in accordance with Agent's and Lenders' customary procedures for
handling confidential information of this nature, and in accordance with safe
and sound banking practices; (b) will limit access to the nonpublic information
to any Affiliate, agent, officer, director, employee, advisor, attorney, or
representative who needs to know such information for purposes of evaluating the
information or administering the transactions contemplated by this Agreement;
(c) will not make any public announcement or issue any press release or issue
(i) a description of the transactions contemplated by this Agreement, or (ii) a
statement of the consummation of such transactions, in each case in a manner
which reveals the identity of Borrower; and (d) will not provide any nonpublic
information with respect to the transaction contemplated by this Agreement to
any other Person (including Gold Sheets Loan Pricing Corp. or the publishers of
trade publications which disseminate such information) which could reasonably be
expected to result in revealing that Borrower has entered into the transactions
contemplated by this Agreement; provided, however, that Agent or Lenders may
make any disclosure thereof as is reasonably required by a bona fide potential
assignee or participant, as required by any law, rule, or regulation, as
required or requested by any Governmental Authority, any auditor of Agent or any
Lender in connection with its auditing function, or representative thereof, or
pursuant to legal process, or as may be necessary in order to properly enforce
Agent's or Lenders' rights and remedies following an Event of Default.

     9.20 Arbitration. ANY CONTROVERSY OR CLAIM BETWEEN OR AMONG THE PARTIES
HERETO, INCLUDING THOSE ARISING OUT OF OR RELATING TO THIS AGREEMENT OR ANY
RELATED AGREEMENTS OR INSTRUMENTS, INCLUDING ANY CLAIM BASED ON OR ARISING FROM
AN ALLEGED TORT, SHALL BE DETERMINED BY BINDING ARBITRATION IN ACCORDANCE WITH
THE FEDERAL ARBITRATION ACT (OR IF NOT APPLICABLE, THE APPLICABLE STATE LAW),
THE RULES OF PRACTICE AND PROCEDURE FOR THE ARBITRATION OF COMMERCIAL DISPUTES
OF J.A.M.S. D/B/A ENDISPUTE, INC. ("J.A.M.S."), AND THE "SPECIAL RULES" SET
FORTH BELOW. IN THE EVENT OF ANY INCONSISTENCY, THE SPECIAL RULES SHALL CONTROL.
JUDGMENT UPON ANY ARBITRATION AWARD MAY BE ENTERED IN ANY COURT HAVING
JURISDICTION. ANY PARTY TO THIS AGREEMENT MAY BRING AN ACTION, INCLUDING A
SUMMARY OR EXPEDITED PROCEEDING, TO COMPEL ARBITRATION OF ANY CONTROVERSY OR
CLAIM TO WHICH THIS AGREEMENT APPLIES, IN ANY COURT HAVING JURISDICTION OVER
SUCH ACTION.

                             Page 44 of 112 Pages
<PAGE>
 
          (a)  SPECIAL RULES. THE ARBITRATION SHALL BE CONDUCTED IN A LOCATION
     MUTUALLY AGREEABLE TO AGENT AND BORROWER (AND FAILING AGREEMENT, IN NEW
     YORK, NEW YORK) AND ADMINISTERED BY J.A.M.S., WHO WILL APPOINT AN
     ARBITRATOR; IF J.A.M.S. IS UNABLE OR LEGALLY PRECLUDED FROM ADMINISTERING
     THE ARBITRATION, THEN THE AMERICAN ARBITRATION ASSOCIATION WILL SERVE. ALL
     ARBITRATION HEARINGS WILL BE COMMENCED WITHIN 90 DAYS OF THE DEMAND FOR
     ARBITRATION; FURTHER, THE ARBITRATOR SHALL ONLY, UPON A SHOWING OF CAUSE,
     BE PERMITTED TO EXTEND THE COMMENCEMENT OF SUCH HEARING FOR UP TO AN
     ADDITIONAL 60 DAYS.

          (b)  RESERVATION OF RIGHTS. NOTHING IN THIS AGREEMENT SHALL BE DEEMED
     TO (i) LIMIT THE APPLICABILITY OF ANY OTHERWISE APPLICABLE STATUTES OF
     LIMITATION OR REPOSE AND ANY WAIVERS CONTAINED IN THIS AGREEMENT; OR (ii)
     BE A WAIVER BY LENDER OF THE PROTECTION AFFORDED TO IT BY 12 U.S.C. (S) 91
     OR ANY SUBSTANTIALLY EQUIVALENT STATE LAW; OR (iii) LIMIT THE RIGHT OF
     LENDER HERETO (A) TO EXERCISE SELF HELP REMEDIES SUCH AS (BUT NOT LIMITED
     TO) SET-OFF, OR (B) TO FORECLOSE AGAINST ANY REAL OR PERSONAL PROPERTY
     COLLATERAL, OR (C) TO OBTAIN FROM A COURT PROVISIONAL OR ANCILLARY REMEDIES
     SUCH AS (BUT NOT LIMITED TO) INJUNCTIVE RELIEF OR THE APPOINTMENT OF A
     RECEIVER. LENDER MAY EXERCISE SUCH SELF HELP RIGHTS, FORECLOSE UPON SUCH
     PROPERTY, OR OBTAIN SUCH PROVISIONAL OR ANCILLARY REMEDIES BEFORE, DURING,
     OR AFTER THE PENDENCY OF ANY ARBITRATION PROCEEDING BROUGHT PURSUANT TO
     THIS AGREEMENT. AT AGENT'S OR LENDERS' OPTION, FORECLOSURE UNDER A DEED OF
     TRUST OR MORTGAGE MAY BE ACCOMPLISHED BY ANY OF THE FOLLOWING: THE EXERCISE
     OF A POWER OF SALE UNDER THE DEED OF TRUST OR MORTGAGE, OR BY JUDICIAL SALE
     UNDER THE DEED OF TRUST OR MORTGAGE, OR BY JUDICIAL FORECLOSURE. NEITHER
     THIS EXERCISE OF SELF HELP REMEDIES, NOR THE INSTITUTION OR MAINTENANCE OF
     AN ACTION FOR FORECLOSURE OR PROVISIONAL OR ANCILLARY REMEDIES SHALL,
     CONSTITUTE A WAIVER OF THE RIGHT OF ANY PARTY, INCLUDING THE CLAIMANT IN
     ANY SUCH ACTION, TO ARBITRATE THE MERITS OF THE CONTROVERSY OR CLAIM
     OCCASIONING RESORT TO SUCH REMEDIES.

    [Remainder of Page Intentionally Left Blank; Signature Pages to Follow]

                             Page 45 of 112 Pages
<PAGE>
 
                 SIGNATURE PAGES TO REVOLVING CREDIT AGREEMENT
                    DATED AS OF OCTOBER 9, 1998, EXECUTED BY
                       JOHN C. MALONE, NATIONSBANK, N.A.,
                   AS AGENT FOR THE LENDERS DEFINED THEREIN,
                     SOCIETE GENERALE AND TORONTO DOMINION
             SECURITIES (USA), INC., AS CO-AGENTS, AND THE LENDERS


     IN WITNESS WHEREOF, the undersigned have executed this Agreement as of the
day and year first above written.

Address for Notice:

Terrace Tower II
5619 DTC Parkway                   /s/ John C. Malone
Englewood, Colorado 80111          ----------------------------------
                                   JOHN C. MALONE



STATE OF COLORADO  (S)
                   (S)
COUNTY OF ARAPAHOE (S)


     Before me, a Notary Public, on this day personally appeared JOHN C. MALONE,
known to me to be the person whose name is subscribed to the foregoing
instrument and acknowledged to me that he executed the same for the purposes and
consideration therein expressed.

     Given under my hand and seal of office this 9th day of October,
1998.


                                          Notary Public Signature

(PERSONALIZED SEAL)
                                          /s/ Debra A. Watkins
                                          ---------------------------


                             Page 46 of 112 Pages
<PAGE>
 
                 SIGNATURE PAGES TO REVOLVING CREDIT AGREEMENT
                    DATED AS OF OCTOBER 9, 1998, EXECUTED BY
                       JOHN C. MALONE, NATIONSBANK, N.A.,
                   AS AGENT FOR THE LENDERS DEFINED THEREIN,
                     SOCIETE GENERALE AND TORONTO DOMINION
             SECURITIES (USA), INC., AS CO-AGENTS, AND THE LENDERS


Address for Notice:                  NATIONSBANK, N.A., as Agent and as a Lender

901 Main Street, 19th Floor          By:  /s/ Langford Keith, III
P.O. Box 831000                           ------------------------------
Dallas, Texas  75283-1000                 Langford Keith, III
Attn.: Langford Keith, III                Senior Vice President
Telecopy No.:  (214) 508-1997
                                          Commitment:  $205,000,000

Applicable Lending Office
for Prime Rate Advances:

901 Main Street, 19th Floor
P.O. Box 832409
Dallas, Texas  75283-1000

Applicable Lending Office
for Eurodollar Advances:

901 Main Street, 19th Floor
P.O. Box 832409
Dallas, Texas  75283-1000



                             Page 47 of 112 Pages
<PAGE>
 
                 SIGNATURE PAGES TO REVOLVING CREDIT AGREEMENT
                    DATED AS OF OCTOBER 9, 1998, EXECUTED BY
                       JOHN C. MALONE, NATIONSBANK, N.A.,
                   AS AGENT FOR THE LENDERS DEFINED THEREIN,
                     SOCIETE GENERALE AND TORONTO DOMINION
             SECURITIES (USA), INC., AS CO-AGENTS, AND THE LENDERS


Address for Notice:                     TORONTO DOMINION SECURITIES (USA), INC.
as                                      Co-Agent
c/o The Toronto-Dominion Bank
31 West 52nd Street                        
New York, New York 10019                By:/s/ Michael Bandzierz
Attn: Haresh Sheth                         ---------------------------
Telecopy: (212) 262-1928                     Name: Michael Bandzierz
                                                  --------------------
                                             Title: Managing Director
                                                   -------------------

                                        Commitment:  $0.00

Address for Notice:                     TORONTO DOMINION (TEXAS), INC.,
                                        as a Lender
c/o The Toronto-Dominion Bank
31 West 52nd Street
New York, New York 10019                By:/s/ Jimmy Simien
Attn: Haresh Sheth                         ---------------------------
Telecopy: (212) 262-1928                     Name: Jimmy Simien
                                                  --------------------
                                             Title: Vice President
                                                   -------------------


Applicable Lending Office for           Commitment:  $70,000,000
Prime Rate Advances:

The Toronto-Dominion Bank
909 Fannin, Suite 1700
Houston, Texas 77010

Applicable Lending Office for
Eurodollar Advances:

The Toronto-Dominion Bank
909 Fannin, Suite 1700
Houston, Texas 77010



                             Page 48 of 112 Pages
<PAGE>
 
                 SIGNATURE PAGES TO REVOLVING CREDIT AGREEMENT
                    DATED AS OF OCTOBER 9, 1998, EXECUTED BY
                       JOHN C. MALONE, NATIONSBANK, N.A.,
                   AS AGENT FOR THE LENDERS DEFINED THEREIN,
                     SOCIETE GENERALE AND TORONTO DOMINION
             SECURITIES (USA), INC., AS CO-AGENTS, AND THE LENDERS


Address for Notice:                          SOCIETE GENERALE,
                                             as Co-Agent and as a Lender
Societe Generale
1221 Avenue of the Americas                  By:/s/ Mark Vigil
12th Floor                                      ---------------------
New York, NY 10020                           Name: Mark Vigil   
Attn.: Mark Vigil                                 -------------------        
Telecopy: (212)279-6240                      Title: Director         
                                                   ------------------ 

                                             Commitment:  $70,000,000
Applicable Lending Office
for Prime Rate Advances:

Societe Generale
1221 Avenue of the Americas
12th Floor
New York, NY 10020

Applicable Lending Office
for Eurodollar Advances:

Societe Generale
1221 Avenue of the Americas
12th Floor
New York, NY 10020


                             Page 49 of 112 Pages
<PAGE>
 
                             SCHEDULES AND EXHIBITS



Exhibit A - Form of Assignment and Acceptance
Exhibit B - Form of Revolving Credit Note
Exhibit C - Form of Notice of Borrowing
Exhibit D - Eurodollar Requirements


Schedule 4.1 - Closing List
Schedule 5.2 - Initial Collateral
Schedule 5.5 - Litigation
Schedule 5.11 - Share Ownership



                             Page 50 of 112 Pages
<PAGE>
 
                                   EXHIBIT A

                       FORM OF ASSIGNMENT AND ACCEPTANCE
                       ---------------------------------

     This Assignment and Acceptance (the "ASSIGNMENT AND ACCEPTANCE") is made as
of ______________, 199___ (the "EFFECTIVE DATE"), between 
("ASSIGNOR") and              ("ASSIGNEE").

     Reference is made to that certain Revolving Credit Agreement dated as of
October 9, 1998 (the "CREDIT AGREEMENT") among John C. Malone ("BORROWER"),
certain Lenders defined therein (the "LENDERS"), NationsBank, N.A., a national
banking association, as Agent for the Lenders, and Toronto Dominion Securities
(USA), Inc., and Societe Generale as Co-Agents for the Lenders. This Assignment
and Acceptance is executed and delivered pursuant to, and as contemplated in,
the Credit Agreement. Capitalized terms used but not defined herein shall have
the meanings assigned thereto in the Credit Agreement.

     Assignor and Assignee hereby covenant and agree as follows:

     1.   Assignor hereby sells and assigns to Assignee, and Assignee hereby
purchases and assumes from Assignor, $        of Assignor's Commitment and
Principal Debt, representing a Pro Rata Part of the Commitments and Principal
Debt of    % as of the Effective Date.  The foregoing interest for all events
and circumstances shall be deemed such Assignee's Pro Rata Part (in addition to
any other Pro Rata Part of Assignee, if any) in the Commitments, the Principal
Debt, the Loan Documents, and all payments made to or received from Borrower
pursuant to the Loan Documents and is subject to the terms and conditions
provided in the Loan Documents.

     2.   Assignor hereby (a) represents and warrants to Assignee that Assignor
is the legal and beneficial owner of the Pro Rata Part being assigned by it
hereunder and such interest is free and clear of any adverse claim, and (b)
represents and warrants that as of the date hereof the Pro Rata Part in the
Commitments and the Principal Debt being assigned hereunder is          % 
without giving effect to assignments that are not yet effective.

     3.   Assignee hereby confirms and acknowledges that, except as specifically
set forth herein, Assignor: (a) makes no representation or warranty and assumes
no responsibility with respect to any statements, warranties, or representations
made in or in connection with the Loan Documents, or the execution, legality,
validity, enforceability, genuineness, sufficiency, or value of the Loan
Documents, or any other instrument or document furnished pursuant thereto; (b)
makes no representation or warranty and assumes no responsibility with respect
to the financial condition of Borrower or any other person or entity which is a
party to any of the Loan Documents (collectively, "Other Party"); and (c) makes
no representation or warranty and assumes no responsibility with respect to the
performance or observance by Borrower or any Other Party of any of its
obligations under any of the Loan Documents or any other instrument or document
furnished pursuant thereto.

     4.   Assignee hereby: (a) confirms that it has received a copy of the Loan
Documents, together with such other documents and information as it has deemed
appropriate to make its own credit analysis and decision to enter into this
Assignment and Acceptance; and (b) agrees that it will, independently and
without reliance upon Assignor or any other counterparty and based on such
documents and information as it shall deem appropriate at the time, continue to
make its own credit decisions in taking or not taking action under the Loan
Documents.



                             Page 51 of 112 Pages
<PAGE>
 
     5.   Assignee hereby: (a) appoints and authorizes Agent under the Loan
Documents to take such action as agent on its behalf and to exercise such powers
under the Loan Documents as are delegated to Agent by the terms of the Loan
Documents; and (b) agrees with Assignor for the benefit of Agent and Borrower
that it will perform all of the obligations which by the terms of the Loan
Documents are required to be performed by it as a counterparty (including the
obligation to make payments pursuant to the Loan Documents) and that it shall be
liable directly to Assignor, Agent, Borrower, and, as provided in the Credit
Agreement, to each Lender for the performance of such obligations.

     6.   If Assignee is organized under the laws of a jurisdiction outside the
United States, it hereby represents and agrees that it has delivered or will
within three days after the date of the execution of this Agreement deliver to
Assignor and the Agent completed and signed copies of any forms that may be
required by the United States Internal Revenue Service in order to certify
Assignee's exemption from United States withholding taxes with respect to any
payment or distributions made or to be made to Assignee with respect to the Loan
Documents.

     7.   As of the Effective Date, (a) Assignee shall be a party to the Loan
Documents and, to the extent provided in this Assignment and Acceptance, have
the rights and obligations of a counterparty thereunder, and (b) Assignor shall,
to the extent provided in this Assignment and Acceptance, relinquish its rights
and be released from its obligations in the Loan Documents with respect to the
Pro Rata Part being assigned hereunder.

     8.   Assignee hereby represents and warrants as of the Effective Date: (a)
Assignee has all necessary corporate power and authority to purchase and own the
interest being assigned to it hereunder, and has all necessary corporate power
and authority to perform all its obligations with respect to this Assignment and
Acceptance; (b) the execution and delivery of this Assignment and Acceptance and
all other instruments and documents executed in connection herewith have been
duly authorized by all requisite corporate action of Assignee; and (c) no
approval, authorization, order, license, or consent of, or registration or
filing with, any Governmental Authority or other person is required in
connection with this Assignment and Acceptance.

     9.   This Assignment and Acceptance shall be governed by, and construed in
accordance with, the laws of the State of Texas, without giving effect to the
conflict of laws principles thereof.

     10.  This Agreement may be executed in two or more counterparts each of
which shall be deemed an original but all of which together shall constitute one
and the same instrument.

     11.  Assignee's address for notices and payments under the Agreement and
this Assignment and Acceptance are set forth in Schedule 1 attached hereto and
made a part hereof. Assignee may by notice in accordance with the Credit
Agreement to Assignor, the Agent, and Borrower change the address or telex
number or facsimile number at which notices, communications, and payments are to
be given to it.


    [REMAINDER OF PAGE INTENTIONALLY LEFT BLANK; SIGNATURE PAGES TO FOLLOW]



                             Page 52 of 112 Pages
<PAGE>
 
              SIGNATURE PAGE TO FORM OF ASSIGNMENT AND ACCEPTANCE
                 DATED AS OF _____________, 1998, EXECUTED BY
                   ___________________________, AS ASSIGNOR,
                     AND ___________________, AS ASSIGNEE



                                             ASSIGNOR:


                                             By:
                                             Name:
                                             Title:



                                             ASSIGNEE:


                                             By:
                                             Name:
                                             Title:


ACCEPTED BY AGENT
THIS _____ DAY OF ___________________


AGENT:

NATIONSBANK, N.A.

By:
     Name:
     Title:



                             Page 53 of 112 Pages
<PAGE>
 
                                  SCHEDULE 1

                                      TO

                           ASSIGNMENT AND ACCEPTANCE

                 ADDRESS FOR NOTICES AND ACCOUNTS FOR PAYMENTS


Address:



Account for Payments:
Account No.:
Attention:
Reference:
Depositary:



Applicable Lending
Office - Prime Rate
Advances:



Applicable Lending
Office - Eurodollar
Advances:



                             Page 54 of 112 Pages
<PAGE>
 
                                   EXHIBIT B


                         FORM OF REVOLVING CREDIT NOTE
                         -----------------------------

                                JOHN C.  MALONE

$___________________              Dallas, Texas                 October 9, 1998


     1.   FOR VALUE RECEIVED, JOHN C. MALONE ("MAKER"), hereby unconditionally
promises to pay to the order of ____________________________ ("PAYEE"), at the
address reflected on the signature page of the Loan Agreement (as defined
below), the sum of $ ___________________________ (or, if less, so much thereof
as may be advanced and is outstanding), in lawful money of the United States of
America.

     2.   This Revolving Credit Note (this "NOTE") has been executed and
delivered pursuant to the Revolving Credit Agreement (as renewed, extended,
amended, or restated, the "LOAN AGREEMENT") dated as of the date hereof, between
Maker, Payee, certain other "Lenders," and NationsBank, N.A. as "Agent" for
Lenders, and is the "NOTE" referred to therein. Capitalized terms not defined
herein shall have the meaning assigned to those terms in the Loan Agreement. The
holder of this Note is entitled to the benefits provided in the Loan Agreement.
Reference is hereby made to the Loan Agreement for a statement of (i) the
obligation of Payee to advance funds hereunder, (ii) the prepayment rights and
obligations of Maker, and (iii) the events on which the maturity of this Note
may be accelerated.

     3.   The unpaid principal amount of, and accrued unpaid interest on, this
Note is payable in accordance with the Loan Agreement, but not later than the
Termination Date.

     4.   The unpaid principal balance advanced and outstanding hereunder shall
bear interest from the date of Advance until maturity at the rate per annum
provided in the Loan Agreement. The interest rate specified in this section is
subject to adjustment under the circumstances described in the Loan Agreement.
Interest shall be computed in the manner provided in the Loan Agreement.

     5.   Notwithstanding any provision contained in this Note or any other
document executed or delivered in connection with this Note or in connection
with the Loan Agreement, Payee shall never be deemed to have contracted for or
be entitled to receive, collect, or apply as interest on this Note, any amount
in excess of the maximum rate of interest permitted to be charged by applicable
law, and, if Payee ever receives, collects, or applies as interest any such
excess, then the amount that would be excessive interest shall be applied to
reduce the unpaid principal balance of this Note, and, if the principal balance
of this Note is paid in full by that application, then any remaining excess
shall promptly be paid to Maker. In determining whether the interest paid or
payable under any specific contingency exceeds the highest lawful rate, Maker
and Payee shall, to the maximum extent permitted under applicable law, (i)
characterize any non-principal payment (other than payments expressly designated
as interest payments hereunder) as an expense or fee rather than as interest,
(ii) exclude voluntary prepayments and the effect thereof, and (iii) spread the
total amount of interest throughout the entire contemplated term of this Note so
that the interest rate is uniform throughout that term.

     6.   If the principal of, or any installment of interest on, this Note
becomes due and payable on a day other than a Business Day, then the maturity
thereof shall be extended to the next succeeding Business Day. If this Note, or
any installment or payment due hereunder, is not paid when due, whether at



                             Page 55 of 112 Pages
<PAGE>
 
maturity or by acceleration, or if it is collected through a bankruptcy,
probate, or other court, whether before or after maturity, then Maker shall pay
all costs of collection, including attorney's fees incurred by the holder of
this Note. All past due principal of, and to the extent permitted by applicable
law, interest on this Note shall bear interest until paid at the rate provided
in the Loan Agreement.

     7.   Maker and all sureties, endorsers, guarantors, and other parties ever
liable for payment of any sums payable pursuant to the terms of this Note,
jointly and severally waive demand, presentment for payment, protest, notice of
protest, notice of acceleration, notice of intent to accelerate, diligence in
collection, the bringing of any suit against any party and any notice of or
defense on account of any extensions, renewals, partial payments, or changes in
any manner of or in this Note or in any of its terms, provisions, and covenants,
or any releases or substitutions of any security, or any delay, indulgence, or
other act of any trustee or any holder hereof, whether before or after maturity.

     8.   This Note is being executed and delivered, and is intended to be
performed in the State of Texas. Except to the extent that the laws of the
United States may apply to the terms hereof, the substantive laws of the State
of Texas shall govern the validity, construction, enforcement, and
interpretation of this Note.

                                        MAKER:


                                        John C.  Malone



                             Page 56 of 112 Pages
<PAGE>
 
                                   EXHIBIT C

                              NOTICE OF BORROWING
                              -------------------

     1.   SUBMISSION PURSUANT TO CREDIT AGREEMENT.  This Notice of Borrowing is
executed and delivered by John C. Malone ("BORROWER"), to NationsBank, N.A., as
Agent (the "AGENT"), pursuant to SECTION 2.3 of the Revolving Credit Agreement
(the "AGREEMENT") dated as of October 9, 1998, between Borrower, certain Lenders
defined therein (the "LENDERS"), NationsBank, N.A., a national banking
association, as Agent for the Lenders, and Toronto Dominion Securities (USA),
Inc., and Societe Generale  as Co-Agents for the Lenders.  Any capitalized terms
used and not defined herein shall have the meanings assigned to them in the
Agreement.

     2.   REQUEST FOR ADVANCE. Borrower hereby requests that Lenders make an
Advance to Borrower pursuant to the Agreement as follows:

          A.   PRIME RATE BORROWING.

               (i)   Amount of Prime Rate Borrowing:       

                                   [_]  Borrowing
          
                                   [_]  Rollover/Conversion

               (ii)  Date of Borrowing or Rollover/Conversion
                     of Existing Borrowing:
 
          B.   EURODOLLAR BORROWING.
 
               (i)   Amount of Eurodollar Borrowing:  

                                   [_]  Borrowing

                                   [_]  Rollover/Conversion

               (ii)  Date of Borrowing or Rollover/Conversion
                     of Existing Borrowing:

               (iii) Interest Period:                                day/months
                     (one, two, three, four, or six months).

     3.   Representations, Warranties and Certifications. Borrower hereby
represents, warrants, and certifies to Agent and Lenders that, as of the date of
the Advance requested herein:

          (a)  there exists no Potential Default or Event of Default;

          (b)  the Borrower has performed and complied with all agreements and
               conditions 



                             Page 57 of 112 Pages
<PAGE>
 
               contained in the Agreement that are required to be performed or
               complied with by the Borrower; and

          (c)  the representations and warranties of a continuing nature
               contained in the Agreement and each of the other Loan Documents
               are true and correct in all material respects (except to the
               extent that they speak to a specific date or are based on facts
               which have changed by transactions expressly contemplated or
               permitted by the Credit Agreement), with the same force and
               effect as though made on and as of the date of the Advance.


     4.   PROCEEDS OF BORROWING. Agent is authorized to deposit the proceeds of
the Advance requested hereby, other than an Advance constituting a rollover or
conversion of an existing Advance, to: 

     5.   EXECUTION AUTHORIZED. This Notice of Borrowing is executed on
________, 19__ . The undersigned hereby certifies the accuracy of the foregoing.


                                           John C. Malone



                             Page 58 of 112 Pages
<PAGE>
 
                                   EXHIBIT D

                              EURODOLLAR ADVANCES
                              -------------------

     (a)  INADEQUACY OF EURODOLLAR PRICING. If with respect to an Interest
Period for any Eurodollar Advance:

          (i)  Agent determines that the basis for determining the Eurodollar
     Rate is not available; or

          (ii) a Lender reasonably determines that the Eurodollar Rate as
     determined by Agent will not adequately and fairly reflect the cost to such
     Lender of maintaining or funding the Eurodollar Advance for such Interest
     Period;

then (A) in the case of (i), Agent shall forthwith give notice thereof to
Borrower and Lenders of that determination (which is presumed to be correct in
the absence of manifest error), all Advances shall be Prime Rate Advances, and
until Agent notifies Borrower and Lenders that such circumstances no longer
exist, Lenders' commitments under this Agreement to make, or convert to,
Eurodollar Advances shall be suspended, and (B) in the case of (ii), such Lender
shall forthwith give notice thereof to Agent and Borrower, the obligation of
such Lender to make Eurodollar Advances shall be suspended, Borrower shall, at
its option, either (I) repay in full the then-outstanding principal amount of
all Eurodollar Advances, together with accrued interest thereon on the last day
of the then current Interest Period applicable to such Eurodollar Advances, or
(II) convert such Eurodollar Advances to Prime Rate Advances in accordance with
Section 2.3(c) of this Agreement on the last day of the then-current Interest
Period applicable to each such Eurodollar Advance, and until such Lender
notifies Agent and Borrower that such circumstances no longer exist, such
Lender's commitment under this Agreement to make, or convert to, Eurodollar
Advances shall be suspended.

     (b)  ILLEGALITY OF EURODOLLAR ADVANCES. If, after the date of this
Agreement, the adoption of any applicable law, rule, or regulation, or any
change therein, or any change in the interpretation or administration thereof by
any Governmental Authority, central bank, or comparable agency charged with the
interpretation or administration thereof, or compliance by Agent or any Lender
with any request or directive (whether or not having the force of law) of any
such authority, central bank, or comparable agency shall make it unlawful or
impossible for any Lender to make, maintain, or fund its Eurodollar Advances,
then such Lender shall forthwith give notice thereof to Agent and Borrower.
Before giving any notice pursuant to this subsection, such Lender shall
designate a different Eurodollar lending office if such designation will avoid
the need for giving such notice and will not be otherwise disadvantageous to any
non-trivial extent to such Lender (as determined in good faith by such Lender).
Upon receipt of such notice, Borrower shall either (i) repay in full the then-
outstanding principal amount of any of such Lender's Eurodollar Advances,
together with accrued interest thereon, or (ii) convert such Lender's Eurodollar
Advances to Prime Rate Advances, on either (A) the last day of the then current
Interest Period applicable to such Eurodollar Advance, if such Lender may
lawfully continue to maintain and fund such Eurodollar Advance to such day, or
(B) immediately, if such Lender may not lawfully continue to fund and maintain
such Eurodollar Advance to such day.

     (c)  INCREASED COSTS FOR EURODOLLAR ADVANCES. If, after the date hereof,
any Governmental Authority, central bank, or other comparable authority, shall
at any time impose, modify, or deem applicable any reserve (including any
reserve imposed by the Board of Governors of the Federal Reserve System, and any
reserve requirement included in the Eurodollar Reserve Requirement), special
deposit or



                             Page 59 of 112 Pages
<PAGE>
 
similar requirement against assets of, deposits with, or for the account of, or
credit extended by, any Lender, or shall impose on any Lender (or its Applicable
Lending Office) or the interbank Eurodollar market any other condition affecting
its Eurodollar Advances, the Notes or such Lender's obligation to make
Eurodollar Advances; and the result of any of the foregoing is to increase the
cost to such Lender of making or maintaining its Eurodollar Advances, or to
reduce the amount of any sum received or receivable by such Lender under this
Agreement, or under such Lender's Note, by an amount deemed by such Lender to be
material, then, within five days after demand by such Lender, Borrower shall pay
to Agent, for the account of such Lender, such additional amount or amounts as
will compensate such Lender for such increased reserve, cost or reduction. Such
Lender will (i) notify Agent and Borrower of any event occurring after the date
of this Agreement which will entitle such Lender to compensation pursuant to
this Section, as promptly as practicable (but in any event within 120 days)
after such Lender obtains actual knowledge of such event, and Borrower shall not
be liable for any such increased costs that accrue between the date such
notification is required to be given and the date it was actually given, and
(ii) use good faith and reasonable efforts to designate an Applicable Lending
Office for Eurodollar Advances of such Lender, if such designation will avoid
the need for, or reduce the amount of, such compensation, and will not, in the
sole opinion of such Lender, be disadvantageous to such Lender (provided that
such Lender shall have no obligation to so designate a lending office located in
the United States of America). A certificate of such Lender claiming
compensation under this Section and setting forth in reasonable detail the
calculation of the additional amount or amounts to be paid to it hereunder shall
be presumed to be correct in the absence of manifest error. If a Lender demands
compensation under this Section, then Borrower may at any time, upon at least
five Business Days' prior notice to such Lender and Agent, either (i) repay in
full the then outstanding Eurodollar Advances to such Lender, together with
accrued interest thereon to the date of prepayment, or (ii) convert such
Eurodollar Advances to Prime Rate Advances in accordance with the provisions of
this Agreement; provided, however, that Borrower shall be liable for any Funding
Loss arising pursuant to such actions.

     (d)  EFFECT ON PRIME RATE ADVANCES. If notice has been given pursuant to
PARAGRAPH (A) or (B) above, requiring the Eurodollar Advances to be repaid or
converted, then unless and until Agent notifies Borrower that the circumstances
giving rise to such repayment no longer apply, all Advances shall be Prime Rate
Advances. If Agent notifies Borrower that the circumstances giving rise to such
repayment no longer apply, Borrower may thereafter select Advances to be
Eurodollar Advances in accordance with Section 2.2(c) of this Agreement.

     (e)  FUNDING LOSSES. Borrower shall indemnify Agent and each Lender against
any loss or reasonable expense (such loss or expense is referred to herein as a
"FUNDING LOSS," such term including any loss or reasonable expense sustained or
incurred or to be sustained or incurred in liquidating or reemploying deposits
from third parties acquired to effect or maintain such Advance or any part
thereof as a Eurodollar Advance) which Agent or any Lender may sustain or incur
as a consequence of (i) any failure by Borrower to fulfill on the date of any
Advance hereunder the applicable conditions set forth in SECTION 4, (ii) any
failure by Borrower to borrow hereunder or to convert Advances hereunder after a
Notice of Borrowing has been given, (iii) any payment, prepayment, or conversion
of a Eurodollar Advance required or permitted by any other provisions of this
Agreement, including payments made due to the acceleration of the maturity of
Advances pursuant to SECTION 7.2, or otherwise made on a date other than the
last day of the applicable Interest Period other than pursuant to SECTION
(A)(II) of this Exhibit, (iv) any default in the payment or prepayment of the
principal amount of any Advance or any part thereof or interest accrued thereon,
as and when due and payable (at the due date thereof, by notice of prepayment or
otherwise), or (v) the occurrence of an Event of Default. The term "FUNDING
LOSS" includes an amount equal to the excess, if any, as determined by Agent or
any Lender of (A) its cost of obtaining the funds for the Advance being paid,
prepaid, or converted or not borrowed or converted (based on the Adjusted
Eurodollar Rate applicable thereto) for the period from the date of such
payment, prepayment, or conversion or failure to



                             Page 60 of 112 Pages
<PAGE>
 
borrow or convert to the last day of the Interest Period for such Advance (or,
in the case of a failure to borrow or convert, the Interest Period for the
Advance which would have commenced on the date of such failure to borrow or
convert) over (B) the amount of interest (as estimated by Agent or such Lender)
that would be realized by Agent or such Lender in reemploying the funds so paid,
prepaid, or converted or not borrowed or converted for such period or Interest
Period, as the case may be. A certificate of Agent or such Lender setting forth
any amount or amounts which Agent or such Lender is entitled to receive pursuant
to this PARAGRAPH (E), together with a description in reasonable detail of the
manner in which such amounts have been calculated, shall be delivered to
Borrower and shall be presumed to be correct in the absence of manifest error.
Borrower shall pay to Agent, for itself or for the account of any such Lender,
the amount shown as due on any certificate within five days after its receipt of
the same. Notwithstanding the foregoing, in no event shall Lender be permitted
to receive any compensation hereunder constituting interest in excess of the
Maximum Rate.


                             Page 61 of 112 Pages
<PAGE>
 
                                 SCHEDULE 4.1

                              CLOSING CONDITIONS
                              ------------------

                  Unless otherwise specified, all dated as of
                 October 9, 1998, or a date (a "Current Date")
                    within 30 days before the Closing Date.


H&B       1.   REVOLVING CREDIT AGREEMENT (the "LOAN AGREEMENT") dated as of
               October 9, 1998, between JOHN C. MALONE, ("BORROWER"), certain
               Lenders defined therein (the "LENDERS"), NATIONSBANK, N.A., as
               Agent for the Lenders, and TORONTO DOMINION SECURITIES (USA),
               INC., and SOCIETE GENERALE as Co-Agents for the Lenders -- all
               the terms of which are incorporated and which have the same
               meanings when used in this schedule -- to which must be attached:

                    Exhibit A - Form of Assignment and Acceptance
                    Exhibit B - Form of Revolving Credit Note
                    Exhibit C - Form of Notice of Borrowing
                    Exhibit D - Eurodollar Requirements

                    Schedule 4.1 - Closing List
                    Schedule 5.2 - Initial Collateral
                    Schedule 5.5 - Litigation
                    Schedule 5.11 - Share Ownership

H&B       2.   REVOLVING CREDIT NOTE in the total stated principal amount of
               $150,000,000, executed by Borrower, payable to NationsBank, N.A.,
               in substantially the form of Exhibit B to the Loan Agreement.

H&B       3.   REVOLVING CREDIT NOTE in the total stated principal amount of
               $55,000,000, executed by Borrower, payable to NationsBank, N.A.,
               and substantially the form of Exhibit B to the Loan Agreement

H&B       4.   REVOLVING CREDIT NOTE in the total stated principal amount of
               $70,000,000, executed by Borrower, payable to Toronto Dominion
               (Texas), Inc., in substantially the form of Exhibit B to the Loan
               Agreement.

H&B       5.   REVOLVING CREDIT NOTE in the total stated principal amount of
               $70,000,000, executed by Borrower, payable to Societe Generale,
               and substantially the form of Exhibit B to the Loan Agreement

H&B       6.   PLEDGE AGREEMENT executed by Borrower and Agent.

Borrower            Schedule I - Pledged Shares
                    Schedule II - Collateral Characteristics, Margin Call
                            Percentage, and Original Advance Percentage
                    Schedule III - Form of Pledge Certificate
                    Rule 144 Rider



                             Page 62 of 112 Pages
<PAGE>
 
H&B       7.   RULE 144 RIDER executed by Borrower, substantially in the form of
               RIDER 1 to the Pledge Agreement.

Borrower  8.   STOCK CERTIFICATES for 17,157,952 shares of Tele-Communications,
               Inc. Series B TCI Group Common Stock, in the name of "John C.
               Malone," CUSIP Number 87924V200, as evidenced by the following
               (all shares are Class B Common Stock -- as defined in Issuer's
               Restated Certificate of Incorporation, as amended -- par value of
               $1 per share):

 ----------------------------------------------------------------------------
     CERTIFICATE NUMBER          ISSUE DATE           NUMBER OF SHARES
 ---------------------------------------------------------------------------- 
   TB6735                  January 12, 1996                  2,100,000
 ----------------------------------------------------------------------------
   TB0460                  September 29, 1994                   45,000
 ---------------------------------------------------------------------------- 
   TB6729                  October 7, 1998                   8,650,000
 ----------------------------------------------------------------------------
   TB6730                  October 7, 1998                   2,050,000
 ----------------------------------------------------------------------------
   TB6492                  September 17, 1997                  763,869
 ----------------------------------------------------------------------------
   TB6732                  October 7, 1998                     100,000
 ----------------------------------------------------------------------------
   TB6733                  October 7, 1998                     100,000
 ----------------------------------------------------------------------------
   TB6734                  October 7, 1998                     100,000
 ----------------------------------------------------------------------------
   TB6369                  May 29, 1997                      3,249,083
 ----------------------------------------------------------------------------

Borrower  9.   STOCK POWERS, executed in blank, with signatures guaranteed.
 
H&B      10.   UCC-1 FINANCING STATEMENTS executed by Borrower in form suitable
               for filing with the Office of the Secretary of State for
               Colorado.
 
H&B      11.   PURPOSE STATEMENT on Form U-1.
 
S&H      12.   OPINION OF COUNSEL for Borrower in a form satisfactory to Agent.
 
CR&B     13.   OPINION OF FCC COUNSEL for Borrower in a form satisfactory to
               Agent.
 
Borrower 14.   FINANCIAL STATEMENTS for Borrower, dated as of September 23,
               1998.
 
Borrower 15.   NOTICE OF BORROWING, dated as of October 9, 1998, executed by
               Borrower.


Borrower 16.   MALONE CALL AGREEMENT, dated as of February 9, 1998, among Tele-
               Communications, Inc. ("TCI"), Borrower, and Leslie Malone,
               together with amendments, if any, and a waiver letter from TCI
               satisfactory to Agent.

Borrower 17.   JUNE OPTION AGREEMENT, dated as of June 16, 1997, between
               Borrower and TCI.



                             Page 63 of 112 Pages
<PAGE>
 
Borrower  18.  STOCKHOLDERS AGREEMENT, dated as of February 9, 1998, among TCI,
               Borrower, Leslie Malone, Gary Magness, Kim Magness, the Estate of
               Bob Magness, and the Estate of Betsy Magness, together with
               amendments, if any, and a waiver letter satisfactory to Agent.

Borrower  19.  VOTING AGREEMENT, dated as of June 23, 1998, as Amended and
               Restated as of October 9, 1998, among AT&T Corp., Borrower, and
               Leslie Malone, together with further amendments, if any.

Borrower  20.  AGREEMENT AND PLAN OF RESTRUCTURING AND MERGER, 23, 1998, among
               AT&T Corp., Italy Merger dated as of June Corp, and TCI.
 
Borrower  21.  Certified copy of TCI's most current RESTATED CERTIFICATE OF
               INCORPORATION.
 
Borrower  22.  Such other documents and items as Lender may reasonably request.
 



                             Page 64 of 112 Pages
<PAGE>
 
                                 SCHEDULE 5.2

                              INITIAL COLLATERAL
                              ------------------

17,157,952 shares of Tele-Communications, Inc. Series B TCI Group Common Stock,
in the name of "John C. Malone," CUSIP Number 87924V200, as evidenced by the
following:

 ----------------------------------------------------------------------------
    CERTIFICATE NUMBER /1/      ISSUE DATE /2/           NUMBER OF SHARES /3/
 ---------------------------------------------------------------------------- 
   TB6735                  January 12, 1996                  2,100,000
 ----------------------------------------------------------------------------
   TB0460                  September 29, 1994                   45,000
 ---------------------------------------------------------------------------- 
   TB6729                  October 7, 1998                   8,650,000
 ----------------------------------------------------------------------------
   TB6730                  October 7, 1998                   2,050,000
 ----------------------------------------------------------------------------
   TB6492                  September 17, 1997                  763,869
 ----------------------------------------------------------------------------
   TB6732                  October 7, 1998                     100,000
 ----------------------------------------------------------------------------
   TB6733                  October 7, 1998                     100,000
 ----------------------------------------------------------------------------
   TB6734                  October 7, 1998                     100,000
 ----------------------------------------------------------------------------
   TB6369                  May 29, 1997                      3,249,083
 ----------------------------------------------------------------------------


/1/  TB = TCI Group Series B Common Stock

/2/  As of October 9, 1998, all pledged shares represented herein have been
     beneficially owned by Borrower for 2 years or more.

/3/  Each share of TCI Group Series B Common Stock will be converted to .8533
     shares of AT&T Common stock pursuant to the Merger. The total number of as-
     converted AT&T Corp. Common Shares will be 14,415,721 (as rounded to the
     nearest share).



                             Page 65 of 112 Pages
<PAGE>
 
                                 SCHEDULE 5.5

                                  LITIGATION
                                  ----------

I.   AT&T MERGER LITIGATION
     ----------------------

Between June 24 and July 1, 1998, thirteen substantially similar purported class
action complaints were filed by stockholders of Tele-Communications, Inc.
("TCI") in the Court of Chancery of the State of Delaware (the "Delaware
Chancery Court") under the captions Nieto v. Fisher, et al., C.A. No. 16470;
                                    ----------------------
Martin, et al. V. Fisher, et al., C.A. No. 16471; Bove v. Fisher, et al., C.A.
- -------------------------------                   ---------------------
No. 16473; Freiman v. Fisher, et al., C.A. No. 16474; Great Neck Capital
           ------------------------                   ------------------
Appreciation Investment Partnership, L.P. v. Fisher, et al., C.A. No. 16477;
- ----------------------------------------------------------
Cohen v. Fisher, et al., C.A. No. 16478; Silvert v. Fisher, et al., C.A. No.
- ----------------------                   ------------------------
16479; Alex Cooper Profit Sharing Trust v. Fisher, et al. , C.A. No. 16482; Satz
       -------------------------------------------------                    ----
v. Fisher, et al., C.A. No. 16489; Stefansky, et al. v. Fisher, et al., C.A. No.
- ----------------                   ----------------------------------
16490; Hushing v. Fisher, et al., C.A. No.16491; Krim v. Fisher, et al., C.A.
       ------------------------                  ---------------------
No.16495; Hirsch v. Fisher, et al., C.A. No.16501.  All thirteen complaints name
          -----------------------
as defendants TCI and the following directors of TCI:  Donne F. Fisher, John W.
Gallivan, Paul A. Gould, Leo J. Hindery, Jr., Jerome H. Kern, Kim Magness, John
C. Malone, Robert A. Naify and J.C. Sparkman.  The complaints in C.A. Nos.
16470, 16471, 16474, 16478, 16479, 16495, and 16501 also name AT&T Corporation
("AT&T") as a defendant.  The complaints were filed in response to the
announcement on June 24, 1998 of a proposed merger between TCI and AT&T and
allege substantially similar claims.

On June 25 and July 1, 1998, two other substantially similar purported class
action complaints alleging claims arising from the proposed TCI-AT&T merger were
filed in the Delaware Chancery Court under the captions Landau v. Fisher, et
                                                        --------------------
al., C.A. No. 16492, and Getfinger v. Fisher, et al., C.A. No. 16502,
- --                       --------------------------
respectively.  Named as defendants in both complaints are TCI, AT&T and the TCI
board of directors:  Donne F. Fisher, John W. Gallivan, Paul A. Gould, Leo J.
Hindery, Jr., Jerome H. Kern, Kim Magness, John C. Malone, Robert A. Naify and
J.C. Sparkman.

In addition to the above complaints, the complaint in an existing derivative
action against TCI and the TCI board of directors in the Delaware Chancery
Court, In re Tele-Communications, Inc. Shareholder Litigation,  Consolidated
       ------------------------------------------------------
C.A. No. 16128, was amended on June 26, 1998 to include claims arising from the
proposed TCI-AT&T merger substantially similar to those alleged in the thirteen
actions above.

II.  MAGNESS ESTATE SETTLEMENT LITIGATION
     ------------------------------------

The following actions were filed in the Court of Chancery of the State of
Delaware In and For New Castle County in response to the settlement of In the
                                                                       ------
Matter of the Estate of Bob Magness, Case No. 96 PR 944, District Court for the
- -----------------------------------
County of Arapahoe in the State of Colorado: Morgan, et al. v. Tele-
                                             ----------------------
Communications, Inc. et al., Civil Action No. 16128-NC; Steiner v. Tele-
- --------------------------                              ---------------
Communications, Inc. et al., Civil Action No. 16130-NC; Weisberg v. Tele-
- --------------------------                              ----------------
Communications, Inc., et al., Civil Action No. 16131-NC; Pan v. Tele-
- --------------------------                               -----------
Communications, Inc., et al., Civil Action No. 16133; Klein v. Tele-
- --------------------------                            -------------
Communications, Inc., et al., Civil Action No. 16135; Crandon Capital Partners
- --------------------------                            ------------------------
v. Tele-Communications, Inc., et al., Civil Action No.16136; and Deutsch v.
- -----------------------------------                              ---------
Tele-Communications, Inc., et al., Civil Action No.16148.  Also named as
- --------------------------------
defendants in these cases are John C. Malone, John W. Gallivan, Donne F. Fisher,
Leo J. Hindery, Jr., J.C. Sparkman, Paul A. Gould, Jerome H. Kern, Kim Magness,
and Robert A. Naify.  The complaints in the above-named cases were amended on
June 26, 1998 to add claims arising from the proposed TCI-AT&T merger which are
substantially similar to those alleged by plaintiffs in the litigation
referenced under Section I, above.


                             Page 66 of 112 Pages
<PAGE>
 
III.  OTHER TELE-COMMUNICATIONS, INC. STOCKHOLDER LITIGATION
      ------------------------------------------------------
James Dalton et al. filed suit in District Court for Arapahoe County, Colorado,
Case No. 97-CV421, against Tele-Communications, Inc. ("TCI") and certain current
and former officers of TCI and its subsidiary, TCI Communications, Inc. (John C.
Malone, Brendan R. Clouston, Barry P. Marshall, Camille K. Jayne, Sadie N.
Decker, Bruce W. Ravenel, Gerald W. Gaines, Bernard W. Schotters, II) and Daniel
L. Ritchie and Donne F. Fisher, in their capacity as co-personal representatives
of the Estate of Bob Magness.

IV.  TELE-COMMUNICATIONS INTERNATIONAL, INC. STOCKHOLDER LITIGATION
     --------------------------------------------------------------
On July 13, 1998, two putative class action complaints were filed be certain
stockholders of Tele-Communications International, Inc. ("TINTA") in the Court
of Chancery of the State of Delaware.  The actions, which have identical claims
and allegations, are styled as Berkowitz v. Hindery, et al., C.A. No. 16533, and
                               ----------------------------
Chetkov v. Hindery, et al., C.A. No. 16534, respectively.  The complaints were
- --------------------------
filed following the announcement of a proposed business combination in which
Liberty Media Group would acquire all outstanding public shares of TINTA not
already owned by TCI Ventures Group.  The defendants named in both complaints
are Tele-Communications, Inc., TINTA, and the Board of Directors of TINTA:  Leo
J. Hindery, John C. Malone, Gary S. Howard, David J. Evans, Pierre Lescure, Paul
A. Gould, Fred A. Vierra, and Jerome H. Kern.



                             Page 67 of 112 Pages
<PAGE>
 
                                 SCHEDULE 5.11

                                SHARE OWNERSHIP
                                ---------------

 ----------------------------------------------------------------------------
    CERTIFICATE NUMBER /1/      ISSUE DATE /2/           NUMBER OF SHARES /3/
 ---------------------------------------------------------------------------- 
   TB6735                  January 12, 1996                  2,100,000
 ----------------------------------------------------------------------------
   TB0460                  September 29, 1994                   45,000
 ---------------------------------------------------------------------------- 
   TB6729                  October 7, 1998                   8,650,000
 ----------------------------------------------------------------------------
   TB6730                  October 7, 1998                   2,050,000
 ----------------------------------------------------------------------------
   TB6492                  September 17, 1997                  763,869
 ----------------------------------------------------------------------------
   TB6732                  October 7, 1998                     100,000
 ----------------------------------------------------------------------------
   TB6733                  October 7, 1998                     100,000
 ----------------------------------------------------------------------------
   TB6734                  October 7, 1998                     100,000
 ----------------------------------------------------------------------------
   TB6369                  May 29, 1997                      3,249,083
 ----------------------------------------------------------------------------


/1/  TB = TCI Group Series B Common Stock

/2/  As of October 9, 1998, all pledged shares represented herein have been
     beneficially owned by Borrower for 2 years or more.

/3/  Each share of TCI Group Series B Common Stock will be converted to .8533
     shares of AT&T Common stock pursuant to the Merger. The total number of as-
     converted AT&T Corp. Common Shares will be 14,415,721 (as rounded to the
     nearest share).



                             Page 68 of 112 Pages

<PAGE>
 
                                 EXHIBIT 7(q)
                               PLEDGE AGREEMENT*
                                October 9, 1998

<TABLE> 
==================================================================================================
<S>                                             <C> 
 AGENT/SECURED PARTY:                           PLEDGOR(S)/DEBTOR(S):
 
 NationsBank, N.A., Agent                       John C. Malone
 901 Main Street                                c/o Tele-Communications, Inc.
 19th Floor                                     Terrace Tower II
 Dallas, TX 75202                               5619 DTC Parkway
 Dallas County                                  Englewood, CO  80111
                                                Arapahoe County
 
 
 (Street address including county)              (Name and street address including county)
==================================================================================================
 Pledgor/Debtor is:   [X] Individual   [_] Corporation   [_] Partnership   [_] Other
 ______________________________________
 
Address is Pledgor's/Debtor's:  [_] Residence   [X] Place of Business   [_]  Chief
Executive Office if more than one place of business
==================================================================================================
</TABLE>

Capitalized terms not otherwise defined in this Pledge Agreement (this
"AGREEMENT")  have the same meaning as assigned to such terms in the Loan
Agreement (hereinafter defined).

1.  SECURITY INTEREST.  For good and valuable consideration, the receipt and
adequacy of which are hereby acknowledged, Pledgor/Debtor (hereinafter referred
to as "PLEDGOR") pledges, assigns and grants to Lenders, acting through Agent
(hereinafter referred to as "SECURED PARTY") acting as their agent hereunder, a
security interest and lien in the Collateral (hereinafter defined) to secure the
payment and the performance of the Obligation (hereinafter defined).

2.  COLLATERAL.  The security interest is granted in the following collateral
(the "COLLATERAL"):

    A.  DESCRIPTION OF COLLATERAL. The investment property and/or securities
evidenced or represented by the certificated securities described on SCHEDULE I
attached hereto and incorporated herein for all purposes, together with all
investment property and/ or securities hereafter delivered to Secured Party in
substitution therefor or in addition thereto, and further including without
limitation all shares of capital stock of AT&T Corp., or any of its subsidiaries
or affiliates, issued in exchange for any of the initial Pledged Shares or as a
result of the Merger, (such investment property and/or securities described on
SCHEDULE I or hereafter delivered to Secured Party, collectively referred to
herein as the "PLEDGED SHARES"), together with all cash, securities, dividends,
increases, distributions and profits received from or on the Pledged Shares,
including distributions or payments in partial or complete liquidation or
redemption, or as a result of reclassifications, readjustments, reorganizations
or changes in the capital structure of the issuers of the Pledged Shares
(hereinafter referred to herein -- whether one or more -- as the "ISSUERS") and
any other property at any time and from time to time received, receivable or
otherwise distributed or delivered to Secured Party, and all rights and
privileges pertaining thereto.

It is contemplated by the parties that Pledgor may provide additional Collateral
from time to time hereunder as additional security for the Obligation, and may
from time to time, with the prior written consent of Secured Party, sell or
otherwise dispose of any Collateral; provided that Pledgor provides Secured
Party with substitute Collateral satisfactory to Secured Party it sole
discretion, except as otherwise 



                             Page 69 of 112 Pages
<PAGE>
 
provided in SECTION 6.D.II, and Pledgor complies at all times with the
provisions of SECTION 6. At the time of each addition or substitution of
Collateral, the investment property and/or securities added or substituted shall
be identified on a Pledge Certificate, substantially in the form of SCHEDULE III
attached hereto (the "PLEDGE CERTIFICATE"), and delivered to Secured Party.
Pledgor understands and agrees that Secured Party is under no obligation to
attribute Collateral Value (as hereinafter defined) to any such additional or
substituted Collateral unless (i) such additional and/or substituted Collateral
is satisfactory to Secured Party in its sole discretion, and (ii) the security
interest granted to Secured Party therein is perfected (with first priority) to
the satisfaction of Secured Party. All such additional and/or substituted
Collateral shall be considered "Pledged Shares" and "Collateral" for purposes of
this Agreement, and shall secure the Obligation in the same manner as the
Collateral for which it is added to and/or substituted. In addition, the issuers
of additional investment property and/or securities, constituting Collateral for
the purposes of this Agreement, shall be considered "ISSUERS," for all purposes
of this Agreement.

     B.   PROCEEDS. All additions, substitutes and replacements for and proceeds
of the above Collateral (including all income and benefits resulting from any of
the above, such as dividends payable or distributable in cash, property or
stock; interest, premium and principal payments; redemption proceeds and
subscription rights; and shares or other proceeds of conversions or splits of
any securities in the Collateral). All subscriptions, warrants, options and any
other rights issued now or hereafter by any of the Issuers or any other person
whatsoever upon or in connection with the above Collateral and all accounts and
general intangibles arising from or related to the Collateral. Any investment
property and/or securities received by Pledgor, which shall comprise such
additions, substitutes and replacements for, or proceeds of, the Collateral,
shall be held in trust for Secured Party and shall be delivered immediately to
Secured Party. Any cash proceeds shall be held in trust for Secured Party and
upon request shall be delivered immediately to Secured Party; provided however,
prior to the occurrence of an Event of Default (as hereinafter defined) Pledgor
may retain any cash dividends paid on the Collateral.

3.   OBLIGATION.

     A.   DESCRIPTION OF OBLIGATION. The following obligations ("OBLIGATION")
are secured by this Agreement:

          I.    ALL DEBT: All debts, obligations, liabilities and agreements now
or hereafter existing, arising directly or indirectly between Pledgor, Secured
Party, Co-Agent and any of the Lenders under that certain Revolving Credit
Agreement, as it may be renewed, extended, amended, or restated, (the "LOAN
AGREEMENT") dated as of the date hereof, between Pledgor, Secured Party as
"Agent" for the "Lenders," Toronto Dominion Securities (USA), Inc. and Societe
Generale as "Co-Agents," and certain other Lenders, whether absolute or
contingent, joint or several, secured or unsecured, due or not due, liquidated
or unliquidated, arising by operation of law or otherwise, and all renewals,
extensions and rearrangements of any of the above.

          II.   NATIONSBANK  PROMISSORY NOTES:  All debt arising under (or
evidenced by) those certain Revolving Credit Notes dated October 9, 1998, in the
principal face amounts of $150,000,000.00 and of $55,000,000.00 executed by
Pledgor payable to the order of NationsBank, N.A., and any and all renewals,
extensions and rearrangements thereof;

          III.  TORONTO DOMINION PROMISSORY NOTE: All debt arising under(or
evidenced by) that certain Revolving Credit Note dated October 9, 1998, in the
principal face amount of $70,000,000.00 executed by Pledgor payable to the order
of Toronto Dominion (Texas), Inc., and any and all renewals, extensions and
rearrangements thereof;

                             Page 70 of 112 Pages
<PAGE>
 
          IV.   SOCIETE GENERALE PROMISSORY NOTE: All debt arising under (or
evidenced by) that certain Revolving Credit Note dated October 9, 1998, in the
principal face amount of $70,000,000.00 executed by Pledgor payable to order of
Societe Generale, and any and all renewals, extensions and rearrangements
thereof;

          V.    All debts, obligations and liabilities now or hereafter existing
or arising (directly or indirectly) between Pledgor and Secured Party, Co-Agents
and the Lenders, or any of them, under, or pursuant to, any interest rate swap
agreement, interest rate protection agreement, foreign currency exchange
agreement, commodity price protection agreement, or other interest or currency
exchange rate or commodity price hedging arrangement, and all modifications,
amendments, substitutions and replacements thereof;
 
          VI.   All costs and expenses incurred by Secured Party, including
attorney's fees, to obtain, preserve, perfect, enforce and defend this Agreement
and maintain, preserve, collect and realize upon the Collateral, together with
interest thereon at the default rate provided in the Loan Agreement; and

          VII.  All amounts which may be owed to Secured Party or any of the
Lenders pursuant to the Loan Documents, or any other documents executed in
connection with the indebtedness described in SUBPART I. above.

In the event any amount paid to Secured Party, or any of the Lenders, on any
Obligation is subsequently recovered from Secured Party or any of the Lenders in
or as a result of any bankruptcy, insolvency or fraudulent conveyance proceeding
involving an obligor of the Obligation other than Pledgor, Pledgor shall be
liable to the party from whom such amounts were recovered for the amounts so
recovered up to the fair market value of the Collateral whether or not the
Collateral has been released or the security interest terminated.  In the event
the Collateral has been released or the security interest terminated, the fair
market value of the Collateral shall be determined, at the option of the party
from whom such amounts were recovered, as of the date the Collateral was
released, the security interest terminated, or said amounts were recovered.

     B.  USE OF PROCEEDS.  The proceeds of any indebtedness or obligation
secured by the Collateral may be used directly or indirectly to purchase or
carry any "margin stock" as that term is defined in Regulation U of the Board of
Governors of the Federal Reserve System, or extend credit to or invest in other
parties for the purpose of purchasing or carrying any such "margin stock," or to
reduce or retire any indebtedness incurred for such purpose or otherwise in a
manner which would not violate Regulations T or U of the Board of Governors of
the Federal Reserve System.

4.   PLEDGOR'S WARRANTIES. Pledgor hereby represents and warrants to Secured
Party as follows:

     A.  FINANCING STATEMENTS. Except as may be noted by schedule attached
hereto and incorporated herein by reference, no financing statement covering the
Collateral is or will be on file in any public office, except the financing
statements relating to this security interest, and no security interest, other
than the one herein created, has attached or been perfected in the Collateral or
any part thereof.

     B.  OWNERSHIP.  Pledgor owns, or will use the proceeds of any loans by
Lenders to become the owner of, the Collateral free from any setoff, claim,
restriction, lien, security interest or encumbrance except liens for taxes not
yet due and payable and the security interest hereunder.

     C.  POWER AND AUTHORITY. Pledgor has full power and authority to make this
Agreement, and all necessary consents and approvals of any persons, entities,
governmental or regulatory authorities and

                             Page 71 of 112 Pages
<PAGE>
 
securities exchanges have been obtained to effectuate the validity of this
Agreement.

     D.  PLEDGED SHARE CHARACTERISTICS.  The Pledged Shares which have been
pledged by Pledgor to Secured Party under this Agreement, or may hereafter be
pledged under this Agreement, satisfy and shall satisfy each of the requirements
and characteristics set forth on SCHEDULE II hereto.

The delivery at any time by Pledgor to Secured Party of additional Pledged
Shares shall constitute a representation and warranty by Pledgor that, with
respect to such Pledged Shares, and each item thereof, the matters heretofore
warranted in SECTIONS 4.A. through 4.D. immediately above are true and correct
at, and as if they were made at, the date of such delivery.

5.   PLEDGOR'S COVENANTS.  Until full payment and performance of all of the
Obligation and termination or expiration of any obligation or commitment of
Lenders to make advances or loans to Pledgor, unless Secured Party otherwise
consents in writing:

     A.  OBLIGATION AND THIS AGREEMENT.  Pledgor shall perform all of its
agreements herein and in any other agreements between it, Secured Party and any
of the Lenders.

     B.  OWNERSHIP OF COLLATERAL. Pledgor shall defend the Collateral against
all claims and demands of all persons at any time claiming any interest therein
adverse to Secured Party. Pledgor shall keep the Collateral free from all liens
and security interests except those for taxes not yet due and payable and the
security interest hereby created.

     C.  SECURED PARTY'S COSTS. Pledgor shall pay all costs necessary to obtain,
preserve, perfect, defend and enforce the security interest created by this
Agreement, collect the Obligation, and preserve, defend, enforce and collect the
Collateral, including but not limited to taxes, assessments, reasonable
attorney's fees, legal expenses and expenses of sales. Whether the Collateral is
or is not in Secured Party's possession, and without any obligation to do so and
without waiving Pledgor's default for failure to make any such payment, Secured
Party at its option may pay any such costs and expenses and discharge
encumbrances on the Collateral, and such payments shall be a part of the
Obligation and bear interest at the rate set out in the Obligation. Pledgor
agrees to reimburse Secured Party on demand for any costs so incurred.

     D.  INFORMATION AND INSPECTION. Pledgor shall (i) promptly furnish Secured
Party any information with respect to the Collateral reasonably requested by
Secured Party; (ii) allow Secured Party or its representatives to inspect and
copy, or furnish Secured Party or its representatives with copies of, all
records relating to the Collateral and the Obligation; and (iii) promptly
furnish Secured Party or its representatives with any other information Secured
Party may reasonably request.

     E.  ADDITIONAL DOCUMENTS. Pledgor shall sign and deliver any papers
furnished by Secured Party which are necessary or desirable in the judgment of
Secured Party to obtain, maintain and perfect the security interest hereunder
and to enable Secured Party to comply with any federal or state law in order to
obtain or perfect Secured Party's interest in the Collateral or to obtain
proceeds of the Collateral.

     F.  NOTICE OF CHANGES. Pledgor shall notify Secured Party immediately of
(i) any material change in the Collateral, (ii) a change in Pledgor's residence
or location, (iii) a change in any matter warranted or represented by Pledgor in
this Agreement, in any of the other Loan Documents, or any other document or
instrument relating to the Obligation or furnished to Secured Party pursuant to
this Agreement, and (iv) the occurrence of an Event of Default under this
Agreement or any of the other Loan Documents.

                             Page 72 of 112 Pages
<PAGE>
 
     G.  POSSESSION OF COLLATERAL. Pledgor shall deliver a copy of this
Agreement (or other notice acceptable to Secured Party) to any broker, financial
intermediary, or any other person in possession of any of the Collateral or on
whose books the interest of Pledgor in the Collateral appears, and such delivery
shall constitute notice to such person of Secured Party's security interest in
the Collateral and shall constitute Pledgor's instruction to such person to note
Secured Party's security interest on their books and records, or deliver to
Secured Party certificates or other evidence of the Collateral promptly upon
Secured Party's request. Pledgor shall deliver all investment securities and
other instruments and documents which are a part of the Collateral and in
Pledgor's possession to Secured Party immediately, or if hereafter acquired,
immediately following acquisition, in a form suitable for transfer by delivery
or accompanied by duly executed instruments of transfer or assignment in blank
with signatures appropriately guaranteed in form and substance suitable to
Secured Party.

     H.  CHANGE OF NAME/STATUS. Pledgor shall not change his name or use any
trade name.

     I.  POWER OF ATTORNEY. Pledgor appoints Secured Party and any officer
thereof as Pledgor's attorney-in-fact with full power in Pledgor's name and on
Pledgor's behalf to do every act which Pledgor is obligated to do or may be
required to do hereunder; however, nothing in this paragraph shall be construed
to obligate Secured Party to take any action hereunder nor shall Secured Party
be liable to Pledgor for failure to take any action hereunder. This appointment
shall be deemed a power coupled with an interest and shall not be terminable as
long as the Obligation is outstanding and shall not terminate on the disability
or incompetence of Pledgor. Without limiting the generality of the foregoing,
Secured Party shall have the right and power to receive, endorse and collect all
checks and other orders for the payment of money made payable to Pledgor
representing any dividend, interest payment or other distribution payable in
respect of the Collateral or any part thereof; provided, however, prior to the
occurrence of an Event of Default, Pledgor may retain any dividends paid on the
Collateral.

     J.  OTHER PARTIES AND OTHER COLLATERAL. No renewal or extensions of or any
other indulgence with respect to the Obligation or any part thereof, no
modification of the document(s) evidencing the Obligation, no release of any
security, no release of any person (including any maker, indorser, guarantor or
surety) liable on the Obligation, no delay in enforcement of payment, and no
delay or omission or lack of diligence or care in exercising any right or power
with respect to the Obligation or any security therefor or guaranty thereof or
under this Agreement shall in any manner impair or affect the rights of Secured
Party under any law, hereunder, or under any other agreement pertaining to the
Collateral. Secured Party need not file suit or assert a claim for personal
judgment against any person for any part of the Obligation or seek to realize
upon any other security for the Obligation, before foreclosing or otherwise
realizing upon the Collateral. Pledgor waives any right that can be waived to
the benefit of or to require or control application of any other security or
proceeds thereof, and agrees that Secured Party shall have no duty or obligation
to Pledgor to apply to the Obligation any such other security or proceeds
thereof.

     K.  WAIVERS BY PLEDGOR. Pledgor waives notice of the creation, advance,
increase, existence, extension or renewal of, and of any indulgence with respect
to, the Obligation; waives presentment, demand, notice of dishonor, and protest;
waives notice of acceleration (or intent to accelerate) of the Obligation;
waives notice of the amount of the Obligation outstanding at any time, notice of
any change in financial condition of any person liable for the Obligation or any
part thereof, notice of any Event of Default, and all other notices respecting
the Obligation; and agrees that maturity of the Obligation and any part thereof
may be accelerated, extended or renewed one or more times by Secured Party in
its discretion, without notice to Pledgor. Pledgor waives any right to require
that any action be brought against any other person or to require that resort be
had to any other security or to any balance of any deposit account.

                             Page 73 of 112 Pages
<PAGE>
 
Pledgor further waives any right of subrogation or to enforce any right of
action against any other pledgor until the Obligation is paid in full.

     L.  ADDITIONAL PROVISIONS. If one or more Riders to this Agreement are
executed by Pledgor, the covenants and provisions of each such Rider shall be
incorporated by reference into this Agreement.

     M.  RULE 144 RIDER. The Collateral is comprised in whole or in part of
control and/or restricted securities, which shall be subject to the additional
terms and provisions described on the RULE 144 RIDER attached hereto and made a
part hereof for all purposes.

6.   MAINTENANCE OF COLLATERAL.

     A.  MAINTENANCE OF COLLATERAL.  At all times during the term of the
Agreement, Pledgor agrees to maintain as security for the Obligation Collateral
which (subject to the provisions of the second paragraph of SECTION 2.A.) is of
a type described on SCHEDULE II with an Adjusted Collateral Value (as determined
herein) in excess of the unpaid principal balance of the Obligation.  The
Adjusted Collateral Value shall be determined by multiplying the Collateral
Value (as defined in SECTION 6.B. below) by the Margin Call Percentage shown on
SCHEDULE II.

     In addition, no Advance requested by Pledgor shall be made to Pledgor if
the sum of (i) the outstanding principal balance of the Obligation plus (ii) the
amount of the Advance requested, equals or exceeds the sum of the amounts
determined by multiplying the Collateral Value by the Original Advance
Percentage shown on SCHEDULE II for each type of Collateral securing the
Obligation.

     B.  VALUE OF COLLATERAL. The "COLLATERAL VALUE" of Collateral shall be
determined at any given time as follows:

         i.     If stock, the Collateral Value shall be determined by
multiplying (i) the per share price of such stock at the most recent close of
trading on a trading exchange for such stock, times (ii) the number of shares of
such stock held by Secured Party as Collateral. In the event that stock held as
Collateral is not traded on an exchange, the Collateral Value of such stock
shall be determined by obtaining the quoted value of such stock from a reputable
brokerage firm selected by Secured Party. If no such quote is available, the
value will be determined by Secured Party in its sole discretion.

          ii.   If a mutual fund, the Collateral Value shall be determined by
multiplying (i) the most recent per share net asset value of such mutual fund
obtained from the Wall Street Journal, times (ii) the number of shares of such
mutual fund held by Secured Party as Collateral. In the event that such net
asset value is not available in the Wall Street Journal, the Collateral Value
shall be the value quoted to Secured Party by a reputable brokerage firm
selected by Secured Party.

          iii.  If corporate bonds, the Collateral Value shall be determined
from the most recent closing price for such bonds obtained from the Wall Street
Journal. If such closing price is not available in the Wall Street Journal, the
Collateral Value shall be the value quoted to Secured Party by a reputable
brokerage firm selected by Secured Party.

          iv.   If government or agency obligations or bonds, the Collateral
Value shall be determined from the most recent closing bid price for such bonds
obtained from the Wall Street Journal. If such closing bid price is not
available in the Wall Street Journal, the Collateral Value shall be the value
quoted to Secured Party by a reputable brokerage firm selected by Secured Party.

                             Page 74 of 112 Pages
<PAGE>
 
          v.    If other than stock, mutual funds, corporate bonds, or
government or agency obligations or bonds, the Collateral Value shall be
determined by the Secured Party in its sole discretion.

     C.   BREACH OF COLLATERAL MAINTENANCE.  If Pledgor fails to maintain
Collateral with an Adjusted Collateral Value as set forth above, the Pledgor
shall have two Business Days from the date Pledgor is notified by Secured Party
(in writing or orally) of such noncompliance, to either pledge additional
Collateral satisfactory to Secured Party, in its sole discretion, or reduce the
unpaid principal balance of the Obligation such that, in either case, the unpaid
principal balance of the Obligation is less than the sum of the amounts
determined by multiplying the Collateral Value by the Original Advance
Percentage shown on SCHEDULE II.  Any reduction in unpaid principal of the
Obligation shall not affect or reduce any future principal payments due except
to the extent such reductions are applied in accordance with the documents
evidencing or securing the Obligation.  In the event Pledgor fails to comply
with the terms hereof, Secured Party may, without any further notice of any
kind, exercise any of the following rights and remedies, at Secured Party's
option:

     (a)  The rights and remedies set out in SECTION 8.B. of this Agreement,
     including without limitation the right to accelerate the Obligation and
     liquidate the Collateral.

     (b)  Sell all or any part of the Collateral and apply the proceeds of such
     sale to the Obligation to bring the Obligation back into compliance (that
     is, to reduce the unpaid principal of the Obligation such that the unpaid
     principal of the Obligation is less than the sum of the amounts determined
     by multiplying the Collateral Value by the Original Advance Percentage
     shown on SCHEDULE II).

If an Event of Default exists hereunder and the Collateral is declining in value
or threatens to decline speedily in value, Secured Party shall have no
obligation to notify Pledgor of the failure to maintain Collateral with an
Adjusted Collateral Value as set forth in SECTION 6.A. above or to provide
Pledgor with an opportunity to cure such noncompliance, and in such case Pledgor
agrees that Secured Party may immediately at Secured Party's sole option (i)
declare amounts due under the Obligation to be immediately due and payable,
and/or (ii) sell all or any part of the Collateral and apply the proceeds of
such Collateral to the Obligation.

     D.   SALE OR SUBSTITUTION OF COLLATERAL.

          I.    GENERAL.  If no Event of Default has occurred under this
Agreement, Pledgor may, provided none of the following actions would result in
the occurrence of an Event of Default: (A) sell, trade, or withdraw any part of
the Collateral; or (B) substitute new Collateral for existing Collateral,
provided that, in either event, the new Collateral shall be acceptable to
Secured Party in its sole discretion and the unpaid principal balance of the
Obligation shall be less than the sum of the amounts determined by multiplying
the Collateral Value by the Original Advance Percentage for each type of
Collateral securing the Obligation.

          II.   PERMITTED SUBSTITUTE COLLATERAL. Secured Party agrees that, upon
and after the occurrence of the Merger, and subject to the terms and conditions
of this PARAGRAPH II and the satisfaction of the Collateral Characteristics
described in SCHEDULE II, the following classes (each a "PERMITTED CLASS") of
AT&T Corp. Common Stock are satisfactory to Secured Party, for purposes of
PARAGRAPH I above:

     (A)  AT&T Corp. Common Stock, $1.00 par value ("T STOCK");

     (B)  Any other class or series of AT&T Corp. Common Stock ("CONSUMER
          TRACKING STOCK"),

                             Page 75 of 112 Pages
<PAGE>
 
          other than T Stock or AT&T Liberty Media Group Common Stock.

In particular, Pledgor will be permitted to exchange: (x) pursuant to the
Merger, Pledged Shares consisting of TCI Group Series A and Series B Common
Stock for shares of T Stock, and (y) pursuant to an exchange offer to holders of
T Stock generally, anticipated to occur following the Merger, Pledged Shares
consisting of T Stock for shares consisting of Consumer Tracking Stock;
provided, however, that Pledgor shall provide Secured Party with reasonable
notice of Pledgor's intent to participate in such exchange offer; and provided,
further, if Secured Party reasonably determines (after the expiration of four
calendar weeks following the consummation of such exchange offer) that the
volume limitations of Rule 145 would likely prevent Secured Party from selling
(within the three-month period beginning on the date of Secured Party's
determination) all Pledged Shares consisting of Consumer Tracking Stock, then
upon Secured Party's request, Pledgor shall use his best efforts promptly to
provide Secured Party with substitute Collateral, consisting of T Stock or other
Collateral satisfactory to Secured Party in its sole discretion, for that number
of Pledged Shares of Consumer Tracking Stock which Secured Party reasonably
determines likely could not be sold within such three-month period.  In
addition, following the occurrence of (and during the continuance of) a Default
or Event of Default, Pledgor shall comply with Secured Party's requirements, and
use reasonable efforts to cause other Persons, to limit sales of shares (other
than Pledged Shares) consisting of Consumer Tracking Stock by Pledgor and other
Persons whose sales of shares of such Consumer Tracking Stock would be counted
in determining the maximum amount of such shares that Pledgor can sell under
Rule 145.  Secured Party will take such actions (including release of
Collateral) as may reasonably required to tender Pledged Shares in connection
with the Merger and with the exchange offer described above; provided that any
shares issued as a result thereof shall be delivered to Agent, and Secured Party
shall at all times have a perfected first priority security interest in the
Pledged Shares being tendered until Secured Party receives a perfected first
lien security interest in the shares issued as a result of the Merger or the
exchange offer.

7.   RIGHTS AND POWERS OF SECURED PARTY.

     A.   GENERAL.  Secured Party, before or after the occurrence of an Event of
Default, without liability to Pledgor may: take control of proceeds, including
stock received as dividends or by reason of stock splits; release the Collateral
in its possession to Pledgor, temporarily or otherwise; require additional
Collateral; and reject as unsatisfactory any property hereafter offered by
Pledgor as Collateral.  Other than the exercise of reasonable care to ensure the
safe custody of the Collateral in Secured Party's possession, and except as set
forth in Section 7.4 of the Loan Agreement,  Secured Party shall have no
obligation, duty, or responsibility for the Collateral and specifically, without
limiting the foregoing, shall have no obligation, duty, or responsibility to
collect any amounts payable, or exercise any right or option, in respect of the
Collateral or to sell all or any portion of the Collateral to avoid market loss.
Secured Party shall not be liable for failure to collect any account or
instruments, or for any act or omission on the part of Secured Party, its
officers, agents, or employees, except for its or their own willful misconduct
or gross negligence.  The foregoing rights and powers of Secured Party will be
in addition to, and not a limitation upon, any rights and powers of Secured
Party given by law, elsewhere in this Agreement, or otherwise.

     B.   CONVERTIBLE COLLATERAL.  Before or after the occurrence of an Event of
Default, Secured Party may present for conversion any Collateral which is
convertible into any other instrument or investment security or a combination
thereof with cash; provided, however, that: (i) Secured Party shall provide
Pledgor with notice if any of the Collateral is presented for conversion, but
such notice shall not be a condition precedent to Secured Party taking such
action; and (ii) prior to the occurrence of an Event of Default, Secured Party
agrees that it shall not convert (a) Tele-Communications, Inc. ("TCI") Series B
Common Stock into TCI Series A Common Stock; (b) TCI Liberty Media Group Series
B Common Stock into TCI Liberty Media Group Series A Common Stock; and (c) TCI
Ventures Group Series B Common 

                             Page 76 of 112 Pages
<PAGE>
 
Stock into TCI Ventures Group Series A Common Stock. Except as set forth in
Section 7.4 of the Loan Agreement, Secured Party shall have no obligation to
present any Collateral for conversion. Notwithstanding anything contained in
this Agreement to the contrary, foreclosure on and disposition of Collateral
that consists of High Vote Stock shall be subject to Secured Party's compliance
with Section 7.4 of the Loan Agreement.

     C.   VOTING RIGHTS.  Prior to a sale or disposition of Collateral following
an Event of Default,  Pledgor shall be entitled to exercise any and all voting
and/or consensual rights and powers relating or pertaining to the Collateral or
any part thereof for any purpose not inconsistent with the terms of this
Agreement.

8.   DEFAULT.

     A.   EVENT OF DEFAULT.  An event of default ("EVENT OF DEFAULT") shall
occur if: (a) Pledgor or any other obligor on all or part of the Obligation
shall fail to timely and properly pay or observe, keep or perform any term,
covenant, agreement or condition in this Agreement or in any other agreement
between Pledgor and Secured Party or between Secured Party and any other obligor
on the Obligation, including but not limited to any other note or instrument,
loan agreement, security agreement, deed of trust, mortgage, promissory note,
assignment or other agreement or instrument concerning the Obligation; or (b) an
Event of Default shall occur under the Loan Agreement or any of the other Loan
Documents. Pledgor agrees that, among its other covenants and agreements
contained herein, the failure to maintain Collateral with an Adjusted Collateral
Value as set forth in SECTION 6 hereof shall constitute an Event of Default
under this Agreement and the Loan Agreement.

     B.   RIGHTS AND REMEDIES.  If any Event of Default shall occur, then, in
each and every such case, Secured Party may, without (a) presentment, demand, or
protest, (b) notice of default, dishonor, demand, non-payment, or protest, (c)
notice of intent to accelerate all or any part of the Obligation, (d) notice of
acceleration of all or any part of the Obligation, or (e) notice of any other
kind, all of which Pledgor hereby expressly waives (except for any notice
required under this Agreement, any of the other Loan Documents or which may not
be waived under applicable law), at any time thereafter exercise and/or enforce
any of the following rights and remedies, at Secured Party's option:

          I.    ACCELERATION.  Declare the Obligation immediately due and
payable, and the obligation, if any, of Secured Party to permit further
borrowings under the Obligation shall at Secured Party's option immediately
cease and terminate.

          II.   LIQUIDATION OF COLLATERAL.  Subject to applicable securities
Laws,  sell, or instruct any agent or broker to sell, all or any part of the
Collateral in a public or private sale, direct any agent or broker to liquidate
all or any part of any account and deliver all proceeds thereof to Secured
Party, and apply all proceeds to the payment of any or all of the Obligation in
such order and manner as Secured Party shall, in its discretion, choose.
Secured Party is authorized, at any sale of the Collateral, if it deems it
advisable, to restrict the prospective bidders or purchasers to those persons
who will represent and agree that they are purchasing for their own account, for
investment, and not with a view to distribution or sale of any of the
Collateral.  Secured Party shall have no obligation to disclose or provide any
information concerning the Issuers or the Collateral to prospective purchasers
of the Collateral other than information in its possession at such time.

          III.  UNIFORM COMMERCIAL CODE.  All of the rights, powers and remedies
of a secured creditor under the Uniform Commercial Code ("UCC") as adopted in
the jurisdiction to which Secured Party is subject under this Agreement.
Pledgor acknowledges and agrees that the Collateral is customarily 

                             Page 77 of 112 Pages
<PAGE>
 
sold on a recognized market and accordingly Secured Party (subject to applicable
securities Laws) may sell the Collateral without prior notification,
advertisement, or notice of any kind at any broker's board or securities
exchange.

          IV.  RIGHT OF SET OFF.  Without notice or demand to Pledgor, set off
and apply against any and all of the Obligation any and all deposits (general or
special, time or demand, provisional or final) at any time held, and any other
indebtedness owing, by Secured Party or by any of its Affiliates or
correspondents to or for the credit of the account of Pledgor or any guarantor
or indorser of Pledgor's Obligation; in addition, any Lender may, without notice
or demand to Pledgor, set off and apply against any and all of the Obligation
any and all deposits (general or special, time or demand, provisional or final)
at any time held, and any other indebtedness owing, by such Lender or by any of
its Affiliates or correspondents to or for the credit of the account of Pledgor
or any guarantor or indorser of Pledgor's Obligation.

          V.   ADDITIONAL REMEDIES.  Without liability to Pledgor: take control
of funds generated by the Collateral, such as cash dividends, interest and
proceeds, and use same to reduce any part of the Obligation and exercise all
other rights which an owner of such Collateral may exercise; and at any time
transfer any of the Collateral or evidence thereof into its own name or that of
its nominee.

Pledgor specifically understands and agrees that any sale by Secured Party of
all or part of the Collateral pursuant to the terms of this Agreement may be
effected by Secured Party at times and in manners which could result in the
proceeds of such sale as being significantly and materially less than might have
been received if such sale  had occurred at different times or in different
manners, and Pledgor hereby releases Secured Party and its officers and
representatives from and against any and all obligations and liabilities arising
out of or related to the timing or manner of any such sale.

If, in the opinion of Secured Party, there is any question that a public sale or
distribution of any Collateral will violate any state or federal securities law,
Secured Party may offer and sell such Collateral in a transaction exempt from
registration under federal securities law, and any such sale made in good faith
by Secured Party shall be deemed "commercially reasonable."

9.   GENERAL.

     A.   PARTIES BOUND.  Secured Party's rights hereunder shall inure to the
benefit of Secured Party, any of the Lenders, and their respective successors
and assigns, and in the event of any assignment or transfer of any of the
Obligation or the Collateral, Secured Party thereafter shall be fully discharged
from any responsibility with respect to the Collateral so assigned or
transferred, but Secured Party shall retain all rights and powers hereby given
with respect to any of the Obligation or the Collateral not so assigned or
transferred.  All representations, warranties and agreements of Pledgor if more
than one are joint and several and all shall be binding upon the personal
representatives, heirs, successors and assigns of Pledgor.

     B.   WAIVER.  No delay of Secured Party in exercising any power or right
shall operate as a waiver thereof; nor shall any single or partial exercise of
any power or right preclude other or further exercise thereof or the exercise of
any other power or right.  No waiver by Secured Party of any right hereunder or
of any default by Pledgor shall be binding upon Secured Party unless in writing,
and no failure by Secured Party to exercise any power or right hereunder or
waiver of any default by Pledgor shall operate as a waiver of any other or
further exercise of such right or power or of any further default.  Each right,
power and remedy of Secured Party as provided for herein or in any of the other
Loan Documents, or which shall now or hereafter exist at law or in equity or by
statute or otherwise, shall be cumulative and 

                             Page 78 of 112 Pages
<PAGE>
 
concurrent and shall be in addition to every other such right, power or remedy.
The exercise or beginning of the exercise by Secured Party of any one or more of
such rights, powers or remedies shall not preclude the simultaneous or later
exercise by Secured Party of any or all other such rights, powers or remedies.

     C.   AGREEMENT CONTINUING.  This Agreement shall constitute a continuing
agreement applying to all future as well as existing transactions, whether or
not of the character contemplated at the date of this Agreement, and if all
transactions between Secured Party and Pledgor shall be closed at any time,
shall be equally applicable to any new transactions thereafter.  Provisions of
this Agreement, unless by their terms exclusive, shall be in addition to other
agreements between the parties.  Time is of the essence of this Agreement.

     D.   DEFINITIONS.  Unless the context indicates otherwise, definitions in
the UCC apply to words and phrases in this Agreement; if UCC definitions
conflict, Articles 8 and/or 9 definitions apply.

     E.   NOTICE.  Notice shall be deemed reasonable if mailed postage prepaid
at least 5 days before the related action (or if the UCC elsewhere specifies a
longer period, such longer period) to the address of Pledgor given above.  Each
notice, request and demand shall be deemed given or made, if sent by mail, upon
the earlier of the date of receipt or five (5) days after deposit in the U.S.
Mail, first class postage prepaid, or if sent by any other means, upon delivery.

     F.   MODIFICATIONS.  No provision hereof shall be modified or limited
except by a written agreement expressly referring hereto and to the provisions
so modified or limited and signed by Pledgor and Secured Party.  The provisions
of this Agreement shall not be modified or limited by course of conduct or usage
of trade.

     G.   PARTIAL INVALIDITY.  The unenforceability or invalidity of any
provision of this Agreement shall not affect the enforceability or validity of
any other provision herein, and the invalidity or unenforceability of any
provision of any of the Loan Documents to any person or circumstance shall not
affect the enforceability or validity of such provision as it may apply to other
persons or circumstances.

     H.   APPLICABLE LAW AND VENUE.  This Agreement has been delivered in the
State of Texas and shall be construed in accordance with the laws of that State.
It is performable by Pledgor in the county or city of Secured Party's address
set out above and Pledgor expressly waives any objection as to venue in any such
location.  Wherever possible each provision of this Agreement shall be
interpreted in such manner as to be effective and valid under applicable law,
but if any provision of this Agreement shall be prohibited by or invalid under
applicable law, such provision shall be ineffective to the extent of such
prohibition or invalidity, without invalidating the remainder of such provisions
or the remaining provisions of this Agreement.

     I.   FINANCING STATEMENT.  To the extent permitted by applicable law, a
carbon, photographic or other reproduction of this Agreement or any financing
statement covering the Collateral shall be sufficient as a financing statement.

     J.   ARBITRATION.  ANY CONTROVERSY OR CLAIM BETWEEN OR AMONG THE PARTIES
          -----------                                                        
HERETO INCLUDING BUT NOT LIMITED TO THOSE ARISING OUT OF OR RELATING TO THIS
INSTRUMENT, AGREEMENT OR DOCUMENT OR ANY RELATED INSTRUMENTS, AGREEMENTS OR
DOCUMENTS (INCLUDING BUT NOT LIMITED TO THE LOAN DOCUMENTS), INCLUDING ANY CLAIM
BASED ON OR ARISING FROM AN ALLEGED TORT, SHALL BE DETERMINED BY BINDING
ARBITRATION IN ACCORDANCE WITH THE FEDERAL ARBITRATION ACT (OR IF NOT
APPLICABLE, THE APPLICABLE

                             Page 79 of 112 Pages
<PAGE>
 
STATE LAW), THE RULES OF PRACTICE AND PROCEDURE FOR THE ARBITRATION OF
COMMERCIAL DISPUTES OF J.A.M.S./ENDISPUTE OR ANY SUCCESSOR THEREOF ("J.A.M.S."),
AND THE "SPECIAL RULES" SET FORTH BELOW. IN THE EVENT OF ANY INCONSISTENCY, THE
SPECIAL RULES SHALL CONTROL. JUDGMENT UPON ANY ARBITRATION AWARD MAY BE ENTERED
IN ANY COURT HAVING JURISDICTION. ANY PARTY TO THIS INSTRUMENT, AGREEMENT OR
DOCUMENT MAY BRING AN ACTION, INCLUDING A SUMMARY OR EXPEDITED PROCEEDING, TO
COMPEL ARBITRATION OF ANY CONTROVERSY OR CLAIM TO WHICH THIS AGREEMENT APPLIES
IN ANY COURT HAVING JURISDICTION OVER SUCH ACTION.

         I.   SPECIAL RULES.  THE ARBITRATION SHALL BE CONDUCTED IN A LOCATION
              -------------                                                   
MUTUALLY AGREEABLE TO SECURED PARTY AND PLEDGOR (AND FAILING AGREEMENT, IN NEW
YORK, NEW YORK) AND ADMINISTERED BY J.A.M.S. WHO WILL APPOINT AN ARBITRATOR; IF
J.A.M.S. IS UNABLE OR LEGALLY PRECLUDED FROM ADMINISTERING THE ARBITRATION, THEN
THE AMERICAN ARBITRATION ASSOCIATION WILL SERVE.  ALL ARBITRATION HEARINGS WILL
BE COMMENCED WITHIN 90 DAYS OF THE DEMAND FOR ARBITRATION; FURTHER, THE
ARBITRATOR SHALL ONLY, UPON A SHOWING OF CAUSE, BE PERMITTED TO EXTEND THE
COMMENCEMENT OF SUCH HEARING FOR UP TO AN ADDITIONAL 60 DAYS.

         II.  RESERVATION OF RIGHTS.  NOTHING IN THIS ARBITRATION PROVISION
              ---------------------                                        
SHALL BE DEEMED TO (I) LIMIT THE APPLICABILITY OF ANY OTHERWISE APPLICABLE
STATUTES OF LIMITATION OR REPOSE AND ANY WAIVERS CONTAINED IN THIS INSTRUMENT,
AGREEMENT OR DOCUMENT; OR (II) BE A WAIVER BY SECURED PARTY OF THE PROTECTION
AFFORDED TO IT BY 12 U.S.C. SEC. 91 OR ANY SUBSTANTIALLY EQUIVALENT STATE LAW;
OR (III) LIMIT THE RIGHT OF SECURED PARTY HERETO (A) TO EXERCISE SELF HELP
REMEDIES SUCH AS (BUT NOT LIMITED TO) SETOFF, OR (B) TO FORECLOSE AGAINST ANY
REAL OR PERSONAL PROPERTY COLLATERAL, OR (C) TO OBTAIN FROM A COURT PROVISIONAL
OR ANCILLARY REMEDIES SUCH AS (BUT NOT LIMITED TO) INJUNCTIVE RELIEF, WRIT OF
POSSESSION OR THE APPOINTMENT OF A RECEIVER.  SECURED PARTY MAY EXERCISE SUCH
SELF HELP RIGHTS, FORECLOSE UPON SUCH PROPERTY, OR OBTAIN SUCH PROVISIONAL OR
ANCILLARY REMEDIES BEFORE, DURING OR AFTER THE PENDENCY OF ANY ARBITRATION
PROCEEDING BROUGHT PURSUANT TO THIS INSTRUMENT, AGREEMENT OR DOCUMENT.  NEITHER
THIS EXERCISE OF SELF HELP REMEDIES NOR THE INSTITUTION OR MAINTENANCE OF AN
ACTION FOR FORECLOSURE OR PROVISIONAL OR ANCILLARY REMEDIES SHALL CONSTITUTE A
WAIVER OF THE RIGHT OF ANY PARTY, INCLUDING THE CLAIMANT IN ANY SUCH ACTION, TO
ARBITRATE THE MERITS OF THE CONTROVERSY OR CLAIM OCCASIONING RESORT TO SUCH
REMEDIES.

     K.   CONTROLLING DOCUMENT.  To the extent that this Agreement conflicts
with or is in any way incompatible with any of the other Loan Documents, any
promissory note shall control over any other document, and if such promissory
note does not address an issue, then each other loan document shall control to
the extent that it deals most specifically with an issue.

NOTICE OF FINAL AGREEMENT.

THIS WRITTEN AGREEMENT AND ANY OTHER LOAN DOCUMENTS EXECUTED IN CONNECTION
HEREWITH REPRESENT THE FINAL AGREEMENT BETWEEN THE PARTIES AND MAY NOT BE
CONTRADICTED BY EVIDENCE OF PRIOR,

                             Page 80 of 112 Pages
<PAGE>
 
CONTEMPORANEOUS OR SUBSEQUENT ORAL AGREEMENTS OF THE PARTIES. THERE ARE NO
UNWRITTEN ORAL AGREEMENTS BETWEEN THE PARTIES.


        [Remainder of page intentionally blank; signature pages follow]



                             Page 81 of 112 Pages
<PAGE>
 
IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be duly
executed by their duly authorized representatives as of the date first above
written.


AGENT/SECURED PARTY:                               PLEDGOR(S)/DEBTOR(S):

NATIONSBANK, N.A., AGENT


By:  /s/ Langford Keith, III                       /s/ John C. Malone
     ------------------------------------------    ------------------
     Langford Keith, III, Senior Vice President    John C. Malone




                             Page 82 of 112 Pages
<PAGE>
 
                                  SCHEDULE I
                                      TO
                               PLEDGE AGREEMENT


<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------
    CERTIFICATE NUMBER/1/       ISSUE DATE/2/            NUMBER OF SHARES/3/
- ------------------------------------------------------------------------------
<S>                            <C>                       <C>
- ------------------------------------------------------------------------------- 
TB6735                         January 12, 1996                   2,100,000
- ------------------------------------------------------------------------------- 
TB0460                         September 29, 1994                    45,000
- ------------------------------------------------------------------------------- 
TB6729                         October 7, 1998                    8,650,000
- ------------------------------------------------------------------------------- 
TB6730                         October 7, 1998                    2,050,000
- ------------------------------------------------------------------------------- 
TB6492                         September 17, 1997                   763,869
- -------------------------------------------------------------------------------
TB6732                         October 7, 1998                      100,000
- ------------------------------------------------------------------------------- 
TB6733                         October 7, 1998                      100,000
- ------------------------------------------------------------------------------- 
TB6734                         October 7, 1998                      100,000
- ------------------------------------------------------------------------------- 
TB6369                         May 29, 1997                       3,249,083
- -------------------------------------------------------------------------------
</TABLE>

/1/  TB = TCI Group Series B Common Stock

/2/  As of October 9, 1998, all pledged shares represented herein have been
     beneficially owned by Pledgor for 2 years or more.

/3/  Each share of TCI Group Series B Common Stock will be converted to .8533
     shares of AT&T Corp. Common stock pursuant to the Merger. The total number
     of as-converted AT&T Corp. Common Shares will be 14,415,721 (as rounded to
     the nearest share).


                             Page 83 of 112 Pages
<PAGE>
 
                                  SCHEDULE II
                                      TO
                               PLEDGE AGREEMENT


1.   "COLLATERAL CHARACTERISTICS":

     Tele-Communications, Inc. Series A or B, TCI Group Common Stock;

     Tele-Communications, Inc. Series A or B Liberty Media Group Common Stock;

     Tele-Communications, Inc. Series A or B TCI Ventures Group Common Stock;

     AT&T Corp. common stock of any series or class, including T Stock and
     Consumer Tracking Stock; and

     which

          (1) are validly issued, fully paid and non-assessable;

          (2) are owned of record and beneficially by Pledgor, and represented
     by stock certificates issued in the name of Pledgor properly endorsed to
     Secured Party;

          (3) may be sold by Secured Party, pursuant to the terms of the Pledge
     Agreement;

          (4) are traded on the New York Stock Exchange, American Stock Exchange
     or the NASDAQ national market system (each a "RECOGNIZED MARKET");

          (5) have been delivered and pledged to Secured Party pursuant to the
     Pledge Agreement; and

          (6) (a) satisfy the holding period representation contained in SECTION
     5.2 of the Loan Agreement, or (b) with respect to AT&T Corp. common stock
     including Consumer Tracking Stock, can be sold pursuant to the requirements
     of Rule 145 (whether on not within any one three-month period) and were
     issued to Pledgor in a transaction registered under the Securities Act of
     1933, as amended.

2.   MARGIN CALL PERCENTAGE:   Sixty percent (60%).

3.   ORIGINAL ADVANCE PERCENTAGE: Fifty percent (50%).


                             Page 84 of 112 Pages
<PAGE>
 
                                 SCHEDULE III

                          FORM OF PLEDGE CERTIFICATE

     Reference is hereby made to that certain Pledge Agreement dated as of
October 9, 1998, (the "PLEDGE AGREEMENT"), between John C.  Malone ("PLEDGOR")
and NationsBank, N.A., a national banking association, in its capacity as Agent
for itself and the Lenders (in such capacity, referred to herein as "SECURED
PARTY").  This Pledge Certificate is delivered pursuant to SECTION 2 of the
Pledge Agreement.  All capitalized terms used and not otherwise defined herein
shall have their respective meanings as set forth in the Pledge Agreement.

     Pledgor hereby certifies that concurrently with the delivery of this Pledge
     Certificate,

     [ ] Pledgor is delivering to Secured Party the following items of
     Collateral as additional Collateral for the Obligation (collectively, the
     "ADDITIONAL COLLATERAL"):

                                                                                
                                                                                
     
     
     [ ] Pledgor is selling or otherwise disposing of the following items of
     Collateral:

                                                                                
                                                                                
                                                                                
     _______________________, and Pledgor is delivering to Secured Party the
     following items of Collateral being substituted therefor:
                                                                                
                                                                                
                                                                                
                                                                                
     _____________________________ (collectively, the "SUBSTITUTED COLLATERAL").
     
 

     With respect to each of the items of Additional Collateral or Substituted
Collateral, as the case may be, Pledgor acquired such item, and has borne all
economic risks thereto, since the following date or dates:

     Pledgor hereby acknowledges that Pledgor has granted to Secured Party, for
the benefit of Lenders, a security interest in the Additional Collateral and/or
Substituted Collateral pursuant to the Pledge Agreement to secure the Obligation
and that the Collateral covered by the Pledge Agreement includes, without
limitation, the Substituted Collateral and Additional Collateral. Pledgor hereby
represents and warrants that all of the representations and warranties contained
in the Pledge Agreement are true and correct in all material respects, including
with respect to the Additional Collateral and Substituted Collateral, on the
date hereof as though made as of the date hereof.

     EXECUTED this __________ day of _____________________,19______.


                                John C.  Malone



                             Page 85 of 112 Pages
<PAGE>
 
                                RULE 144 RIDER
                                --------------

     This Rule 144 Rider is made this 9th day of October, 1998 and is
incorporated into and shall be deemed to supplement the Pledge Agreement
("AGREEMENT") of the same date given by Pledgor to secure the Obligation to
Secured Party. Terms used and not otherwise defined in this Rider which are
defined in the Agreement have the meanings given them in the Agreement.

     1.  The securities listed on SCHEDULE I to the Agreement, which Schedule is
     made a part of this Rider and the Agreement for all purposes, are or may be
     deemed (check one or more boxes):

     [ X ]  Restricted securities

     [ X ]  Control securities

     for purposes of Rule 144 of the General Rules and Regulations under the
     Securities Act of 1933 ("RULE 144") promulgated by the Securities and
     Exchange Commission. These securities ("RULE 144 SECURITIES") comprise all
     or part of the Collateral held by Secured Party presently subject to the
     terms and conditions of the Agreement and this Rider.

     2.  Pledgor represents and warrants that (i) Pledgor acquired the Rule 144
     Securities, and held such securities, for a period of at least two years
     prior to the date hereof, for purposes of determining the holding period of
     the Rule 144 Securities under Rule 144, and Borrower has borne the full
     economic risks of such securities since their respective dates of
     acquisition; and (ii) the Rule 144 Securities are free and clear of all
     liens (except for liens, encumbrances and debt held by Secured Party)
     encumbrances and debt.  None of the Rule 144 Securities were purchased by
     Pledgor by giving the issuer or an Affiliate of issuer a promissory note or
     other obligation to pay the purchase price of such Rule 144 Securities, and
     none of the Rule 144 Securities were purchased under an installment
     purchase contract.

     3.   Pledgor covenants and agrees that:

          a.  Pledgor will cooperate fully with Secured Party with respect to
          any sale by Secured Party of any of the Rule 144 Securities, including
          full and complete compliance with all requirements of Rule 144, and
          will give to Secured Party all information and will do all things
          necessary, including the execution of all documents, forms,
          instruments and other items, to comply with Rule 144 for the complete
          and unrestricted sale and/or transfer of the Rule 144 Securities and
          will exercise its best efforts to have the issuer of such securities,
          upon the request of Secured Party, take all such action as may be
          required to satisfy the public information requirements of Rule
          144(c).

          b.  Pledgor will not: (i) approve or consent to any amendment of the
          articles of incorporation or charter of any issuer of the Rule 144
          Securities that may materially adversely affect the value of the Rule
          144 Securities; or (ii) permit any issuer of the Rule 144 Securities
          to merge or consolidate (other than the Merger) with or into any
          corporation or other person, without the prior written consent of
          Secured Party if such merger or consolidation would extend any holding
          period under Rule 144 with respect to such Rule 144 Securities or
          otherwise adversely affect Secured Party's ability to sell or
          otherwise dispose of such securities in reliance on Rule 144(k), and
          the interpretations thereof by the Securities and Exchange Commission.

          c.  Pledgor will use its best efforts, upon Secured Party's written
          request, to obtain



                             Page 86 of 112 Pages
<PAGE>
 
          and publish or have issuer publish all information necessary to
          satisfy Rule 144 in the event any issuer of the Rule 144 Securities is
          not current in its filings under the Securities Exchange Act of 1934
          at the time of a foreclosure sale by Secured Party.

     4.   In the event any issuer of the Rule 144 Securities defaults in its
     reporting obligations under the Securities Exchange Act of 1934, Secured
     Party may require Pledgor to substitute new Collateral satisfactory to
     Secured Party in its discretion for such securities.

     By signing below, Pledgor accepts and agrees to the terms and covenants
     contained in this Rider.

                             --------------------- 
                                John C.  Malone



                             Page 87 of 112 Pages

<PAGE>
 
                                 EXHIBIT 7(r)
                        AMENDED AND RESTATED AGREEMENT
                        ------------------------------


          AGREEMENT, dated as of June 23, 1998, and amended and restated as of
October 9, 1998, by and among AT&T Corp., a New York corporation ("Parent"), on
the one hand, and Dr. John C. Malone, a resident of Colorado, individually and
in any Representative Capacity (as defined in Schedule I to this Agreement)
("JM"), and Leslie Malone, a resident of Colorado, individually and in any
Representative Capacity ("LM," and together with JM, the "Stockholders"), on the
other hand.

          WHEREAS, concurrently herewith, Parent, Italy Merger Corp., a Delaware
corporation and a wholly owned subsidiary of Parent ("Merger Sub"), and Tele-
Communications, Inc., a Delaware corporation (the "Company"), are entering into
an Agreement and Plan of Restructuring and Merger (as amended or supplemented
from time to time, the "Merger Agreement"; capitalized terms used without
definition herein having the meanings ascribed thereto in the Merger Agreement);

          WHEREAS, as of February 9, 1998, the Stockholders own and/or have the
power to vote, as applicable, the number and type of Shares (as defined below)
set forth in Schedule I hereto;

          WHEREAS, the Board of Directors of the Company has, prior to the
execution of this Agreement, duly and validly approved and adopted the Merger
Agreement and approved this Agreement, and such approval and adoption have not
been withdrawn;

          WHEREAS, approval of the Merger Agreement by the Company's
stockholders is a condition to the consummation of the Merger; and

          WHEREAS, as a condition to its entering into the Merger Agreement,
Parent has required that each Stockholder agree, and each Stockholder has
agreed, to enter into this Agreement;

          NOW THEREFORE, in consideration of the foregoing and the mutual
covenants and agreements set forth herein, the parties hereto agree as follows:


          Section 1. Agreement to Vote. (a) Provided that Parent has not
                     -----------------
breached or violated Section 4(b) hereof, each Stockholder hereby agrees to
attend the Stockholders Meeting of the Company (or any other meeting of
stockholders of the Company at which the matters contemplated by the Merger
Agreement or this Agreement are to be presented to a vote of stockholders of the
Company), in person or by proxy, and to vote (or cause to be voted) all Shares
and any other voting securities of the Company (including any such securities
acquired hereafter but excluding any Shares or other securities the Stockholder
has the right to acquire but has not acquired) that such Stockholder directly or
indirectly owns or has the right to vote or direct the voting (collectively, the
"Covered Shares"), for approval and adoption of the Merger Agreement, the Merger
and any related action reasonably required in furtherance thereof, such



                             Page 88 of 112 Pages
<PAGE>
 
agreement to vote to apply also to any adjournment or adjournments or
postponement or postponements of the Stockholders Meeting of the Company (or any
such other meeting). Each Stockholder hereby further agrees that until the
Termination Date (as defined below), he or she shall, from time to time, in
connection with any consent solicitation relating to the Merger Agreement,
timely execute and deliver (or cause to be timely executed and delivered) a
written consent with respect to any Covered Shares in favor of the approval and
adoption of the Merger Agreement, the Merger and any action required in
furtherance thereof.
 
          (b)  From and after the date hereof until the Termination Date, each
Stockholder hereby agrees to vote (or cause to be voted) any Covered Shares
against any Takeover Proposal and any related action reasonably required in
furtherance thereof, at any meeting of stockholders of the Company (including
any adjournments or postponements thereof) called to consider and vote on any
Takeover Proposal.  Each Stockholder further agrees that, until the Termination
Date, in connection with any consent solicitation relating to a Takeover
Proposal, such Stockholder will timely execute and deliver (or cause to be
timely executed and delivered) a written consent with respect to any Covered
Shares against any Takeover Proposal as contemplated by the immediately
preceding sentence.  For purposes hereof, the term "Termination Date" shall mean
the first to occur of (a) the 9 month anniversary of the date of termination of
the Merger Agreement, (b) the date of consummation of the Merger and (c) the
date of any breach or violation of Section 4(b) by Parent; provided, however,
                                                           --------  ------- 
that in the event that the Merger Agreement is terminated after the Parent
Charter Amendment and the issuance of Parent Shares in the Merger has been
submitted to the vote of the stockholders of Parent at the Parent Stockholders
Meeting and not approved and adopted by the requisite holders of Parent Common
Shares at such meeting, or if the Merger Agreement is terminated as a result of
the failure of the Merger to be consummated because of the failure of the
condition in Section 8.1(b) or Section 8.2(e) to be satisfied, the Termination
Date shall be the date of termination of the Merger Agreement.

          (c)  To the extent inconsistent with the foregoing provisions of this
Section 1, each Stockholder hereby revokes any and all previous proxies with
respect to such Stockholder's Covered Shares; provided, however, that the
                                              --------  -------              
foregoing shall not be deemed to affect the rights of the Magness Group (as
defined in the Stockholders Agreement (as defined below)) under that certain
Stockholders Agreement, dated as of February 9, 1998, by and among the Company,
the Stockholders and the members of the Magness Group parties thereto (the
"Stockholders Agreement"), it being agreed that JM shall assert his right under
such agreement to vote Covered Shares held by the Magness Group in accordance
with this Agreement.

          (d)  Subject to Section 5(b), each Stockholder agrees to, and to cause
its affiliates to, cooperate reasonably with Parent and the Company in
connection with the Merger Agreement and the consummation of the transactions
contemplated thereby.

          (e)  Nothing herein contained shall (i) restrict, limit or prohibit JM
from exercising (in his capacity as a director or officer) his fiduciary duties
to the stockholders of the Company under applicable Law, or (ii) require JM, in
his capacity as an officer of the Company, to take any action in contravention
of, or omit to take any action pursuant

                             Page 89 of 112 Pages
<PAGE>
 
to, or otherwise take or refrain from taking any actions which are inconsistent
with, instructions or directions of the Board of Directors of the Company
undertaken in the exercise of its fiduciary duties, provided that nothing in
                                                    --------
this Section 1(e) shall relieve or be deemed to relieve JM from his obligations
under Sections 1 or 2 of this Agreement.

          Section 2.   Disposition of Shares. From and after the date hereof
                       ---------------------
until the Termination Date, each Stockholder hereby agrees that such Stockholder
will not directly or indirectly sell, pledge, encumber, grant any proxy or enter
into any voting or similar agreement with respect to, transfer or otherwise
dispose of (collectively, "Transfer"), or agree or contract to Transfer, any
Covered Shares (or any interest therein) with respect to which a Stockholder
directly or indirectly controls the right to Transfer; provided, however, that
                                                       --------  -------    
(i) JM shall be entitled to sell (directly or indirectly) (x) from the date
hereof until the date of termination of the Merger Agreement, up to an aggregate
of 2,000,000 Shares, and (y) from the date of termination of the Merger
Agreement to the Termination Date, up to an aggregate of an additional 3,000,000
Shares, and (ii) JM shall be entitled to pledge and encumber Shares as provided
in Exhibit A.

          Section 3.  Securities Act Covenants and Representations. Each
                      --------------------------------------------   
Stockholder hereby agrees and represents to Parent as follows:

          (a)  Such Stockholder has been advised that the offering, sale and
delivery of Parent Common Shares and Parent VP Tracking Shares pursuant to the
Merger will be registered under the Securities Act on a Registration Statement
on Form S-4. Such Stockholder has also been advised, however, that to the extent
such Stockholder is considered an "affiliate" of the Company at the time the
Merger Agreement is submitted for a vote of the stockholders of the Company, any
public offering or sale by such Stockholder of any Parent Common Shares or
Parent VP Tracking Shares received by such Stockholder in the Merger will, under
current law, require either (i) the further registration under the Securities
Act of any Parent Common Shares or Parent VP Tracking Shares to be sold by such
Stockholder, (ii) compliance with Rule 145 promulgated by the SEC under the
Securities Act or (iii) the availability of another exemption from such
registration under the Securities Act. Such Stockholder agrees to execute and
deliver an Affiliate Letter as contemplated by the Merger Agreement.

          (b)  Such Stockholder has read this Agreement and the Merger Agreement
and has discussed their requirements and other applicable limitations upon such
Stockholder's ability to sell, transfer or otherwise dispose of Parent Common
Shares or Parent VP Tracking Shares, to the extent such Stockholder believed
necessary, with such Stockholder's counsel or counsel for the Company.

          (c)  Such Stockholder also understands that stop transfer instructions
will be given to Parent's transfer agents with respect to Parent Common Shares
and Parent VP Tracking Shares and that a legend will be placed on the
certificates for the Parent Common Shares and Parent VP Tracking Shares issued
to such Stockholder, or any substitutions therefor, to the extent such
Stockholder is considered an "affiliate" of the

                             Page 90 of 112 Pages
<PAGE>
 
Company at the time the Merger Agreement is submitted for a vote of the
stockholders of the Company.

          Section 4.  Other Covenants and Agreements.
                      ------------------------------ 

          (a)  Further Assurances.  Each party shall execute and deliver such
               ------------------                                            
additional instruments and other documents and shall take such further actions
as may be reasonably necessary or appropriate to effectuate, carry out and
comply with all of their obligations under this Agreement.  Without limiting the
generality of the foregoing, none of the parties hereto shall enter into any
agreement or arrangement (or alter, amend or terminate any existing agreement or
arrangement) or take any other action (or fail to take any other action) if such
action (or failure) would materially impair the ability of any party to
effectuate, carry out or comply with all the terms of this Agreement. Parent
agrees to cooperate with each Stockholder in connection with any filings
required to be made by such Stockholder in connection with the Merger and the
transactions contemplated thereby.

          (b)  Parent shall not require, nor shall any provision of this
Agreement be deemed to require, any Stockholder to agree in his or her capacity
as a stockholder, and shall not agree on behalf of any Stockholder in such
Stockholder's capacity as a stockholder, to the inclusion in any Authorization
required in connection with the Merger or the other transactions contemplated by
the Merger Agreement of any restriction on any Stockholder's exercise and
enjoyment in his and her capacity as a stockholder of full rights of ownership
of Parent Shares to be acquired in the Merger (including, without limitation,
the voting rights related thereto); provided however that the foregoing shall
                                    ----------------                         
not limit or reduce any of the obligations of the Company pursuant to the Merger
Agreement or otherwise alter the rights and obligations of the parties pursuant
to the Merger Agreement or apply to any matters set forth in the Merger
Agreement relating to the Company or any of its Subsidiaries or their respective
assets, businesses or properties.

          Section 5.  Representations and Warranties of Parent. Parent
                      ----------------------------------------  
represents and warrants, severally and not jointly, to each Stockholder as
follows: Each of this Agreement and the Merger Agreement has been approved by
the Board of Directors of Parent, and the Merger Agreement has been approved by
the Board of Directors of Merger Sub and by Parent as the sole stockholder of
Merger Sub, in each case representing all necessary corporate action on the part
of Parent and Merger Sub, except for the approval of Parent's stockholders
contemplated by the Merger Agreement. Each of this Agreement and the Merger
Agreement has been duly executed and delivered by a duly authorized officer of
Parent and, in the case of the Merger Agreement, Merger Sub. Each of this
Agreement and the Merger Agreement constitutes a valid and binding agreement of
Parent and, in the case of the Merger Agreement, Merger Sub, enforceable against
Parent and, in the case of the Merger Agreement, Merger Sub.

          Section 6. Representations and Warranties of the Stockholders. (a)
                     --------------------------------------------------   
Each Stockholder represents and warrants to Parent as follows: Such Stockholder
has the power and authority to execute and deliver this Agreement. This
Agreement has been

                             Page 91 of 112 Pages
<PAGE>
 
duly executed and delivered by such Stockholder. This Agreement constitutes the
valid and binding agreement of such Stockholder. Except as provided in Exhibit
A, such Stockholder has the full power and authority to vote, or execute a
consent, with respect to, all Covered Shares as contemplated hereby. The
securities of the Company listed next to the name of such Stockholder on Part A
of Schedule I hereto are the only securities of the Company owned by such
Stockholder and over which such Stockholder has the power to vote (or direct the
voting), the securities of the Company listed next to the name of such
Stockholder on Part B of Schedule I hereto are the only securities of the
Company owned by such Stockholder over which such Stockholder does not have the
power to vote (or direct the voting), and the securities of the Company listed
next to the name of such Stockholder on Part C of Schedule I hereto are the only
securities of the Company not owned by Stockholder but over which such
Stockholder has the power to vote (collectively, the "Shares").

          (b)  Except as provided in Exhibit A, each Stockholder is the lawful
owner of the Shares listed on Parts A and B of Schedule I as owned by it, free
and clear of all liens, charges, encumbrances and commitments of every kind,
other than this Agreement, and each Stockholder has the power to vote (including
by an irrevocable power to vote or execute a consent) the Shares listed on Parts
A and C of Schedule I. The execution and delivery by such Stockholder of this
Agreement does not violate or breach any law, contract, instrument, agreement or
arrangement to which such Stockholder is a party or by which such Stockholder is
bound. Since February 9, 1998 through the date hereof, the Stockholders' have
not sold more than 500,000 Shares in the aggregate.

          Section 7. Effectiveness. It is a condition precedent to the
                     -------------   
effectiveness of this Agreement that the Merger Agreement shall have been duly
adopted and approved and executed and delivered by the parties thereto, but the
termination of the Merger Agreement shall not impair the effectiveness of this
Agreement except to the extent expressly set forth herein. No action by the
Company pursuant to Section 7.2 of the Merger Agreement (or any other provision
of the Merger Agreement) other than actions that give rise to a Termination Date
shall relieve or be deemed to relieve the Stockholders from their obligations
under this Agreement.

          Section 8.  Miscellaneous.
                      ------------- 

          (a)  Notices, Etc. All notices, requests, demands or other
               ------------
communications required by or otherwise with respect to this Agreement shall be
in writing and shall be deemed to have been duly given to any party when
delivered personally (by courier service or otherwise), when delivered by
telecopy and confirmed by return telecopy, or one day after being mailed by
courier service that guarantees overnight delivery, in each case to the
applicable addresses set forth below:

          If to Parent:

               AT&T Corp.
               295 North Maple Avenue




                             Page 92 of 112 Pages
<PAGE>
 
               Basking Ridge, New Jersey  07920
               Attn:   Vice President-Law and Corporate Secretary
               Telecopy:  (908) 221-6618

          with a copy to:

               Richard D. Katcher, Esq.
               Steven A. Rosenblum, Esq.
               Wachtell, Lipton, Rosen & Katz
               51 West 52nd Street
               New York, New York  10019
               Telecopy:  (212) 403-2000

          If to the Stockholders:

               John C. Malone
               Tele-Communications, Inc.
               5619 DTC Parkway
               Englewood, Colorado 80111

          with a copy to:

               Baker & Botts
               599 Lexington Avenue
               New York, NY 10022
               Attn:  Frederick H. McGrath
               Telecopy:  (212) 705-5125

or to such other address as such party shall have designated by notice so given
to each other party.

          (b)  Amendments, Waivers, Etc.  This Agreement may not be amended,
               -------------------------                                    
changed, supplemented, waived or otherwise modified or terminated except by an
instrument in writing signed by Parent and each Stockholder.

          (c)  Successors and Assigns.  This Agreement shall be binding upon and
               ----------------------                                           
shall inure to the benefit of and be enforceable by the parties and their
respective successors and assigns, including without limitation in the case of
Parent any corporate successor by merger or otherwise, and in the case of a
Stockholder any trustee, executor, heir, legatee or personal representative
succeeding to the ownership of (or power to vote) such Stockholder's Covered
Shares or other securities subject to this Agreement (including as a result of
the death, disability or incapacity of a Stockholder).

          (d)  Entire Agreement.  This Agreement (together with the Merger
               ----------------                                           
Agreement) embodies the entire agreement and understanding among the parties
relating to the subject matter hereof and supersedes all prior agreements and
understandings relating to such subject matter.  There are no representations,
warranties or covenants by 

                             Page 93 of 112 Pages
<PAGE>
 
the parties hereto relating to such subject matter other than those expressly
set forth in this Agreement and the Merger Agreement.

          (e)  Severability.  If any term of this Agreement or the application
               ------------                                                   
thereof to any party or circumstance shall be held invalid or unenforceable to
any extent, the remainder of this Agreement and the application of such term to
the other parties or circumstances shall not be affected thereby and shall be
enforced to the greatest extent permitted by applicable law, provided that in
                                                             --------        
such event the parties shall negotiate in good faith in an attempt to agree to
another provision (in lieu of the term or application held to be invalid or
unenforceable) that will be valid and enforceable and will carry out the
parties' intentions hereunder.

          (f)  Specific Performance.  The parties acknowledge that money damages
               --------------------                                             
are not an adequate remedy for violations of this Agreement and that any party
may, in its sole discretion, apply to a court of competent jurisdiction for
specific performance or injunctive or such other relief as such court may deem
just and proper in order to enforce this Agreement or prevent any violation
hereof and, to the extent permitted by applicable law, each party waives any
objection to the imposition of such relief.

          (g)  Remedies Cumulative.  All rights, powers and remedies provided
               -------------------                                           
under this Agreement or otherwise available in respect hereof at law or in
equity shall be cumulative and not alternative, and the exercise or beginning of
the exercise of any thereof by any party shall not preclude the simultaneous or
later exercise of any other such right, power or remedy by such party.

          (h)  No Waiver.  The failure of any party hereto to exercise any
               ---------                                                  
right, power or remedy provided under this Agreement or otherwise available in
respect hereof at law or in equity, or to insist upon compliance by any other
party hereto with its obligations hereunder, and any custom or practice of the
parties at variance with the terms hereof, shall not constitute a waiver by such
party of his or her right to exercise any such or other right, power or remedy
or to demand such compliance.

          (i)  No Third Party Beneficiaries; Severability.  This Agreement is
               ------------------------------------------                    
not intended to be for the benefit of and shall not be enforceable by any person
or entity who or which is not a party hereto.  The obligations of each
Stockholder hereunder are several and not joint and neither Stockholder shall be
liable for the actions of the other Stockholder.

          (j)  Jurisdiction.  Each party hereby irrevocably submits to the
               ------------                                               
exclusive jurisdiction of the Court of Chancery in the State of Delaware or the
United States District Court for the Southern District of New York or any court
of the State of New York located in the City of New York in any action, suit or
proceeding arising in connection with this Agreement, and agrees that any such
action, suit or proceeding shall be brought only in such court (and waives any
objection based on forum non conveniens or any other objection to venue
                   ----- --- ----------                                
therein); provided, however, that such consent to jurisdiction is solely for the
          --------  -------                                                     
purpose referred to in this paragraph (j) and shall not be deemed to be a
general submission to the jurisdiction of said Courts or in the States of
Delaware or New York 

                             Page 94 of 112 Pages
<PAGE>
 
other than for such purposes. Each party hereto hereby waives any right to a
trial by jury in connection with any such action, suit or proceeding.

          (k)  Governing Law.  This Agreement and all disputes hereunder shall
               -------------                                                  
be governed by and construed and enforced in accordance with the General
Corporation Law of the State of Delaware to the fullest extent possible.

          (l)  Name, Captions, Gender.  The name assigned this Agreement and the
               ----------------------                                           
section captions used herein are for convenience of reference only and shall not
affect the interpretation or construction hereof.  Whenever the context may
require, any pronoun used herein shall include the corresponding masculine,
feminine or neuter forms.

          (m)  Counterparts.  This Agreement may be executed in any number of
               ------------                                                  
counterparts, each of which shall be deemed to be an original, but all of which
together shall constitute one instrument.  Each counterpart may consist of a
number of copies each signed by less than all, but together signed by all, the
parties hereto.

          (n)  Expenses.  Parent and each Stockholder shall bear its, his or her
               --------                                                         
own expenses incurred in connection with this Agreement and the transactions
contemplated hereby.

                             Page 95 of 112 Pages
<PAGE>
 
          IN WITNESS WHEREOF, the parties have duly executed this Agreement as
of the date first above written.

                              AT&T CORP.


                              By: /s/ Daniel E. Somers
                                 --------------------------
                                Name: Daniel E. Somers
                                Title:

                              /s/ John C. Malone
                              -----------------------------
                                     John C. Malone

                              /s/ Leslie Malone
                              -----------------------------
                                      Leslie Malone




                             Page 96 of 112 Pages
<PAGE>
 
                                  SCHEDULE I
                                  ----------

                              SHARE OWNERSHIP/1/
                            As of February 9, 1998


PART A -- SHARES OWNED AND VOTED
- --------------------------------

<TABLE>
<CAPTION>
                                                  TCI Group               Liberty Media Group       TCI Ventures 
                                                                                                        Group 
                                           ---------------------------------------------------------------------------------

                                Class B      Class A   Class B Shares      Class A        Class B      Class A    Class B 
   Name of Stockholder         Preferred      Shares                        Shares         Shares       Shares     Shares 
- -------------------------    -----------------------------------------------------------------------------------------------
<S>                          <C>             <C>       <C>                 <C>          <C>            <C>       <C>  
           JM                    266,700       146       21,186,999              81     12,501,217        -0-    21,241,254
           LM                      6,900       -0-          784,892          12,726        439,875        -0-       793,240
                             -----------------------------------------------------------------------------------------------
 
          Total                  273,600       146       21,971,891          12,807     12,941,092        -0-    22,034,494
                             -----------------------------------------------------------------------------------------------
</TABLE>

PART B -- SHARES OWNED BUT NOT VOTED
- ------------------------------------

<TABLE>
<CAPTION>
                                                            TCI Group                  Liberty Media Group         TCI Ventures
                                                                                                                       Group
                                                  ---------------------------------------------------------------------------------

                                   Class B        Class A            Class B         Class A        Class B      Class A   Class B 
   Name of Stockholder           Preferred         Shares             Shares          Shares        Shares        Shares    Shares
   --------------------   ---------------------------------------------------------------------------------------------------------
   <S>                    <C>                     <C>                <C>             <C>            <C>          <C>       <C> 
          JM                            -0-             -0-             -0-             -0-             -0-           -0-      -0-
          LM                            -0-             -0-             -0-             -0-             -0-           -0-      -0-
                          --------------------------------------------------------------------------------------------------------
 
         Total                          -0-             -0-             -0-             -0-             -0-           -0-      -0-
                          --------------------------------------------------------------------------------------------------------
</TABLE>

PART C -- SHARES VOTED BUT NOT OWNED
- ------------------------------------

<TABLE>
<CAPTION>
                                                            TCI Group                   Liberty Media           TCI Ventures
                                                                                            Group                   Group
                                                  --------------------------------------------------------------------------------

                                   Class B        Class A            Class B      Class A        Class B     Class A    Class B 
   Name of Stockholder           Preferred         Shares             Shares      Shares        Shares       Shares     Shares
   --------------------   --------------------------------------------------------------------------------------------------------
   <S>                    <C>                     <C>            <C>              <C>         <C>            <C>        <C> 
           JM                           -0-            -0-       18,204,656       -0-         14,292,719         -0-    20,405,394
           LM                           -0-            -0-              -0-       -0-                -0-         -0-           -0-
                          --------------------------------------------------------------------------------------------------------
 
         Total                          -0-            -0-       18,204,656       -0-         14,292,719         -0-    20,405,394
                          --------------------------------------------------------------------------------------------------------
</TABLE>

________________________________
/1/  Includes shares to the extent beneficially owned by such Stockholder in a
Representative Capacity. For purposes of this Agreement, "Representative
Capacity" means as proxy, an executor or administrator of any estate, a trustee
of any trust or in any other fiduciary or representative capacity (other than as
trustee or administrator of any employee benefit plan) if such Person, in such
capacity, directly or indirectly possesses the power to vote or dispose or
direct the voting of any Shares.

                             Page 97 of 112 Pages
<PAGE>
 
                                                                       Exhibit A

JM may, at any time and from time to time, pledge up to an aggregate of 30
million Shares to banks or other financial institutions to secure indebtedness.
Such pledges and loans are or will be on customary terms and conditions and do
not and will not interfere with the ability of JM to vote or otherwise comply
with his obligations hereunder in any material respect except as set forth in
the following sentence.  Such pledges and loans, with respect to up to an
aggregate of 22 million Shares, may contain terms that permit the banks or other
financial institutions, in the event of a default, to sell the pledged Shares
free and clear of any obligations or restrictions under this Voting Agreement
and, in the event of such a sale, the parties agree that the obligations and
restrictions set forth in this Voting Agreement shall not apply to such Shares;
provided, that the terms of any such pledge or loan shall require the applicable
banks or financial institutions to convert any Series B Shares to Series A
Shares prior to any such sale; and provided, further, that in the event that any
such pledge or loan contains such provisions, JM shall use his best efforts to
avoid and prevent the occurrence of any default under such pledge or loan.

The shares of Series B TCI Group Common Stock, Series B Liberty Media Group
Common Stock and Series B TCI Ventures Group Common Stock owned by the
Stockholders are subject to the provisions of a call agreement, dated as of
February 9, 1998, among the Stockholders and TCI.

                             Page 98 of 112 Pages

<PAGE>
 
                                 EXHIBIT 7(s)



                                    October 9, 1998



Nationsbank, N.A., as agent (the "Agent")
for the Lenders (the "Lenders") under that
certain Revolving Credit Agreement with
John C.  Malone expected to be dated as
of October 9, 1998 (the "Credit Agreement")

Ladies and Gentlemen:

          Reference is made to the Call Agreement, dated as of February 9, 1998
(the "Malone Call Agreement"), by and among Tele-Communications, Inc. ("TCI"),
John C. Malone ("Malone") and Leslie Malone. Capitalized terms used but not
defined in this letter are intended to have the meanings assigned to them in the
Malone Call Agreement.

          We have been advised that the Lenders propose to enter into the Credit
Agreement and related loan documents (collectively, the "Loan Documents") with
Malone, subject, among other conditions, to the waiver by TCI of certain
provisions of the Malone Call Agreement.   We understand that pursuant to the
Credit Agreement, the Lenders from time to time may make loans or other
extensions of credit ("Advances") to Malone that will be secured by a pledge of
Member Shares owned by Malone.  It is our understanding that the principal
amount of Advances outstanding at any time will not exceed $360 million.  You
have advised us that because the Member Shares to be pledged constitute "margin
stock" for purposes of Regulation U, it is possible that Malone will from time
to time be required to provide additional collateral for the Advances, which he
may do by pledging additional Member Shares.  For purposes of this letter, the
term "Pledged Shares" means all Member Shares from time to time pledged by
Malone to secure Advances under the Credit Agreement as in effect from time to
time.

          We have been informed that the Loan Documents provide that upon a
foreclosure by the Lenders on the Pledged Shares in the case of a default or
event of default under the Loan Documents, the Lenders may (i) transfer all or
part of the Pledged Shares to the Lenders or the Agent or another nominee of the
Lenders, (ii) sell or otherwise transfer all or part of the Pledged Shares to
other transferees, either following or without an intermediate transfer
described in clause (i), and (iii) exercise other rights and remedies with
respect to the Pledged Shares provided for in the Loan Documents (any such case,
to "foreclose on the Pledged Shares").

          TCI hereby confirms that it irrevocably (subject to compliance by the
Lenders and


                             Page 99 of 112 Pages
<PAGE>
 
the Agent with the terms of this letter) waives all provisions, if any, of the
Malone Call Agreement that would otherwise: (i) prohibit or restrict (A) the
pledge by Malone of the Pledged Shares as provided in the Loan Documents or (B)
the exercise of the Lenders' and Agent's rights to foreclose on the Pledged
Shares pursuant to the Loan Documents; or (ii) require that, following an
exercise by the Lenders or the Agent of the right to foreclose on the Pledged
Shares, the Pledged Shares continue to be subject to the Malone Call Agreement
or that the Lenders, Agent or a purchaser at foreclosure of such Pledged Shares
become a member of the Malone Group or a party to the Malone Call Agreement.
TCI's waiver is based upon our understanding that the Lenders acknowledge and
agree that following the pledge of the Pledged Shares and each and every
exercise by the Lenders or the Agent of their right to foreclose on any or all
of the Pledged Shares, such Pledged Shares shall continue to be subject to the
restrictions on transfer, call and other rights of TCI and other provisions of
the Malone Call Agreement to the same extent and with the same effect as if they
continued to be beneficially owned solely by Malone, other than those Pledged
Shares, if any, which the Lenders (for themselves and their successors, assigns
and transferees) or Malone on behalf of the Lenders tender to TCI for conversion
into shares of Low Vote Stock on a share-for-share basis in accordance herewith.
TCI's waiver is also based on our understanding that the Lenders will convert
only such Pledged Shares as they deem appropriate to assure that they receive
proceeds sufficient to pay the Lenders in full the obligations secured by the
Pledged Shares.

          Please note that the Lenders are not required to tender any Pledged
Shares for conversion into Low Vote Stock, but unless such tender is made as
provided above, such Pledged Shares shall continue to be subject to the Malone
Call Agreement as provided above.  If the Lenders (or their agent or nominee)
foreclose or take any other action to enforce the security interest represented
by the pledge of any Pledged Shares, and so tender such Pledged Shares for
conversion into Low Vote Stock on a share-for-share basis, TCI will (i) cause
(subject to the following sentence) such conversion to be effected at the close
of business on the date such Pledged Shares are duly delivered to TCI for
conversion, (ii) reasonably cooperate with the Lenders (or their agent or
nominee) in effecting such conversion as promptly as reasonably practicable,
(iii) comply with Section 6.4(b) of the Stockholders Agreement ("Section
6.4(b)"), with the understanding that the Low Vote Stock into which such Pledged
Shares are converted satisfy the conditions of Section 6.4(b) for removal of
legends as contemplated by Section 6.4(b), and (iv) otherwise reasonably
cooperate with the transfer of the Low Vote Stock into which such Pledged Shares
are converted free of restriction by the Malone Call Agreement and the
Stockholders Agreement.  TCI's obligations under clause (i) above are subject to
(x) such Pledged Shares being duly delivered to TCI for conversion in accordance
with the provisions of Article IV, Section E.2(a) of TCI's Certificate of
Incorporation (as amended to such date) (the "TCI Charter"), (y) the Lenders and
the Agent reasonably cooperating with TCI in connection with such conversion,
and (z) no court of competent jurisdiction having enjoined such conversion.  For
purposes of this letter, the requirements of Article IV, Section E.2(a) of the
TCI Charter will be deemed satisfied upon proper delivery of certificates
representing the Pledged Shares to be so

                             Page 100 of 112 Pages
<PAGE>
 
converted to TCI at its office at 5619 DTC Parkway, Englewood, CO 80111,
Attention: General Counsel (or such other address as TCI may notify the Lenders
and the Agent), accompanied by a duly executed Stock Power and Notice of
Conversion (copies of the forms of which are attached hereto).

          This waiver will automatically terminate if the Lenders, the Agent or
their respective successors, assigns or transferees act in any manner or take
any position in any litigation that is inconsistent with the terms of this
letter.




                             Page 101 of 112 Pages
<PAGE>
 
          This waiver does not, expressly or by implication, amend or modify the
terms of the Malone Call Agreement, which shall continue in full force and
effect as written, nor obligate TCI to give any further or additional waiver in
the future.

                              Very truly yours,

                              TELE-COMMUNICATIONS, INC.



                              By: /s/ Stephen M. Brett
                                 -------------------------------------------
                                  Name:  Stephen M. Brett
                                  Title: Senior Vice President and Secretary




                             Page 102 of 112 Pages
<PAGE>
 
                              FORM OF STOCK POWER
                              -------------------

          FOR VALUE RECEIVED, [______________________] hereby sells, assigns and
transfer to [________________________], ___________________________________
(_________________________________) shares of the Series B TCI Group Common
Stock of Tele-Communications, Inc. (the "Company") standing in
[_______________________]'s name on the books of the Company represented by
Certificate No.(s) ___________________________________ and do irrevocably
constitute and appoint The Bank of New York as attorney to transfer said stock
on the books of the Company with full power of substitution in the premises.


Dated:

                                        __________________________

                                        [_____________]


                             Page 103 of 112 Pages
<PAGE>
 
                         FORM OF NOTICE OF CONVERSION
                         ----------------------------

     The undersigned holder of shares of Series B TCI Group Common Stock hereby
delivers to Tele-Communications, Inc. ("TCI") certificates representing
_____________________ shares of Series B TCI Group Common Stock, duly endorsed
for transfer or accompanied by duly executed stock powers, and requests that TCI
convert _________________ shares of Series B TCI Group Common Stock into an
equal number of shares of Series A TCI Group Common Stock and deliver
certificates representing such shares of Series A TCI Group Common Stock
together with certificates representing the shares of Series B TCI Group Common
Stock for which conversion has not been so requested, to the undersigned at the
address specified below.


                                             _______________________________
                                             [Name of Holder]
                                             [Address]



                             Page 104 of 112 Pages

<PAGE>
 
                                 EXHIBIT 7(t)


                                             October 9, 1998


Nationsbank, N.A., as agent (the "Agent")
for the Lenders (the "Lenders") under that
certain Revolving Credit Agreement with
John C.  Malone expected to be dated as
of October 9, 1998 (the "Credit Agreement")

Ladies and Gentlemen:

          Reference is made to the Stockholders' Agreement, dated as of February
9, 1998 (the "Stockholders' Agreement"), by and among Tele-Communications, Inc.
("TCI"), John C. Malone ("Malone"), Leslie Malone, Gary Magness, both in any
Representative Capacity and individually, Kim Magness, both in any
Representative Capacity and individually, The Estate of Bob Magness (the "Bob
Estate") and the Estate of Betsy Magness.  Capitalized terms used but not
defined in this letter are intended to have the meanings assigned to them in the
Stockholders' Agreement.

          We have been advised that the Lenders propose to enter into the Credit
Agreement and related loan documents (collectively, the "Loan Documents") with
Malone, subject, among other conditions, to the waiver by the undersigned of
certain provisions of the Stockholders' Agreement.  We understand that pursuant
to the Credit Agreement, the Lenders from time to time may make loans or other
extensions of credit ("Advances") to Malone that will be secured by a pledge of
High Vote Shares owned by Malone and that the principal amount of Advances
outstanding at any time will not exceed $360 million.  It is our understanding
that because the High Vote Shares to be pledged constitute "margin stock" for
purposes of Regulation U, it is possible that Malone will from time to time be
required to provide additional collateral for the Advances, which he may do by
pledging additional High Vote Shares.  For purposes of this letter, the term
"Pledged Shares" means all High Vote Shares from time to time pledged by Malone
to secure Advances under the Credit Agreement as in effect from time to time.

          We have been informed that the Loan Documents provide that upon a
foreclosure by the Lenders on the Pledged Shares in the case of a default or
event of default under the Loan Documents, the Lenders may (i) transfer all or
part of the Pledged Shares to the Lenders or the Agent or another nominee of the
Lenders, (ii) sell or otherwise transfer all or part of the Pledged Shares to
other transferees, either following or without an intermediate transfer
described in clause (i), and (iii) exercise other rights and remedies with
respect to the Pledged Shares provided for in the Loan Documents (any such case,
to "foreclose on the Pledged Shares").



                             Page 105 of 112 Pages
<PAGE>
 
          Each of the undersigned hereby confirms that he or it irrevocably
(subject to compliance by the Lenders and the Agent with the terms of this
letter) waives all provisions, if any, of the Stockholders' Agreement that would
otherwise (i) prohibit or restrict (A) the pledge by Malone of the Pledged
Shares as provided in the Loan Documents or (B) the exercise of the Lenders' and
Agent's rights to foreclose on the Pledged Shares pursuant to the Loan
Documents, or (ii) require that, following an exercise by the Lenders or the
Agent of the right to foreclose on the Pledged Shares, the Pledged Shares
continue to be subject to the Stockholders' Agreement or that the Lenders, Agent
or a purchaser at foreclosure of such Pledged Shares become a member of the
Malone Group or a party to the Stockholders' Agreement.  Such waiver is based
upon our understanding that the Lenders acknowledge and agree that following the
pledge of the Pledged Shares and each and every exercise by the Lenders or the
Agent of their right to foreclose on any or all of the Pledged Shares, such
Pledged Shares shall continue to be subject to the restrictions on transfer,
voting and other provisions of the Stockholders' Agreement to the same extent
and with the same effect as if they continued to be beneficially owned solely by
Malone, other than those Pledged Shares, if any, which the Lenders (for
themselves and their successors, assigns and transferees) or Malone (on behalf
of the Lenders) tender to TCI for conversion into Low Vote Shares on a share-
for-share basis in accordance herewith.  Such waiver is also based on our
understanding that the Lenders will convert only such Pledged Shares as they
deem appropriate to assure that they receive proceeds sufficient to pay the
Lenders in full the obligations secured by the Pledged Shares.  Our waiver is
also based on our understanding that unless and until the Lenders foreclose on
the Pledged Shares following a default by Malone, Malone will have the
unqualified (except as provided in the Stockholders' Agreement and the Voting
Agreement referred to below) right to vote all Pledged Shares in his sole and
absolute discretion.  We further understand that if, as a result of a
foreclosure on the Pledged Shares or otherwise, the Lenders, the Agent or their
nominees, successors, assigns or transferees shall become entitled to vote any
of the Pledged Shares at any time prior to their conversion into Low Vote Shares
as provided above, they shall vote such Pledged Shares (i) in the case of any
matter covered by the Voting Agreement, dated as of June 23, 1998, as amended
and restated as of October 9, 1998, among AT&T Corp., Malone, individually and
in any Representative Capacity,  and Leslie Malone, individually and in any
Representative Capacity, in the same manner as Malone would be required to vote
such Pledged Shares if they continued to be held by him, and (ii) in the case of
any other matter, in the manner recommended by the Board of Directors of TCI.

          Please note that the Lenders are not required to tender any Pledged
Shares for conversion into Low Vote Shares, but unless such tender is made as
provided above, such Pledged Shares shall continue to be subject to the
Stockholders' Agreement as provided above.  If the Lenders (or their agent or
nominee) foreclose or take any other action to enforce the security interest
represented by the pledge of any Pledged Shares, and so tender such Pledged
Shares for conversion into Low Vote Shares on a share-for-share basis, TCI will
(i) cause (subject to the following sentence) such conversion to be effected at
the close of business on the date such 

                             Page 106 of 112 Pages
<PAGE>
 
Pledged Shares are duly delivered to TCI for conversion, (ii) reasonably
cooperate with the Lenders (or their agent or nominee) in effecting such
conversion as promptly as reasonably practicable, (iii) comply with Section
6.4(b) of the Stockholders' Agreement, with the understanding that the Low Vote
Shares into which such Pledged Shares are converted satisfy the conditions of
Section 6.4(b) for removal of legends as contemplated by Section 6.4(b), and
(iv) otherwise reasonably cooperate with the transfer of the Low Vote Shares
into which such Pledged Shares are converted free of restriction by the Malone
Call Agreement and the Stockholders' Agreement. TCI's obligations under clause
(i) above are subject to (x) such Pledged Shares being duly delivered to TCI for
conversion in accordance with the provisions of Article IV, Section E.2(a) of
TCI's Certificate of Incorporation (as amended to such date) (the "TCI
Charter"), (y) the Lenders and the Agent reasonably cooperating with TCI in
connection with such conversion, and (z) no court of competent jurisdiction
having enjoined such conversion. For purposes of this letter, the requirements
of Article IV, Section E.2(a) of the TCI Charter will be deemed satisfied upon
proper delivery of certificates representing the Pledged Shares to be so
converted to TCI at its office at 5619 DTC Parkway, Englewood, CO 80111,
Attention: General Counsel (or such other address as TCI may notify the Lenders
and the Agent), accompanied by a duly executed Stock Power and Notice of
Conversion (copies of the forms of which are attached hereto).

          This waiver will automatically terminate if the Lenders, the Agent or
their respective successors, assigns or transferees act in any manner or take
any position in any litigation that is inconsistent with the terms of this
letter.

                             Page 107 of 112 Pages
<PAGE>
 
          This waiver does not, expressly or by implication, amend or modify the
terms of the Stockholders' Agreement, which shall continue in full force and
effect as written, nor obligate any of the undersigned to give any further or
additional consent or waiver in the future.
 
                                   Very truly yours,

TELE-COMMUNICATIONS, INC.               ESTATE OF BOB MAGNESS



By:/s/ Stephen M. Brett                 By:/s/ Kim Magness
   --------------------------------        ------------------------------
   Name: Stephen M. Brett                  Kim Magness, Personal
   Title:Senior Vice President and         Representative
         Secretary
         

                                        By:/s/ Gary Magness
                                           ------------------------------
                                           Gary Magness, Personal         
                                           Representative                  
/s/ Kim Magness
- ----------------------------------
Kim Magness, individually and as
Trustee of the Magness Family
Irrevocable Trusts and the Magness
Issue GST Trusts


/s/ Gary Magness
- ---------------------------------- 
Gary Magness, individually and as
Trustee of the Magness Family
Irrevocable Trusts and the Magness
Issue GST Trusts


ESTATE OF BETSY MAGNESS



By:/s/ Kim Magness
   -------------------------------
   Kim Magness, Personal
   Representative

                             Page 108 of 112 Pages
<PAGE>
 
                              FORM OF STOCK POWER
                              -------------------

          FOR VALUE RECEIVED, [______________________] hereby sells, assigns and
transfer to [________________________], ___________________________________
(_________________________________) shares of the Series B TCI Group Common
Stock of Tele-Communications, Inc. (the "Company") standing in
[_______________________]'s name on the books of the Company represented by
Certificate No.(s) ___________________________________ and do irrevocably
constitute and appoint The Bank of New York as attorney to transfer said stock
on the books of the Company with full power of substitution in the premises.


Dated:

                                             ________________________________
                                             [_________________]




                             Page 109 of 112 Pages
<PAGE>
 
                         FORM OF NOTICE OF CONVERSION
                         ----------------------------

     The undersigned holder of shares of Series B TCI Group Common Stock hereby
delivers to Tele-Communications, Inc. ("TCI") certificates representing
_____________________ shares of Series B TCI Group Common Stock, duly endorsed
for transfer or accompanied by duly executed stock powers, and requests that TCI
convert _________________ shares of Series B TCI Group Common Stock into an
equal number of shares of Series A TCI Group Common Stock and deliver
certificates representing such shares of Series A TCI Group Common Stock
together with certificates representing the shares of Series B TCI Group Common
Stock for which conversion has not been so requested, to the undersigned at the
address specified below.


                                             __________________________________
                                             [Name of Holder]

                                             [Address]




                             Page 110 of 112 Pages

<PAGE>
 
                                 EXHIBIT 7(u)

                           TELE-COMMUNICATIONS, INC.
                               5619 DTC Parkway
                          Englewood, Colorado  80011

                                                                October 9, 1998


AT&T Corp.
295 North Maple Avenue
Basking Ridge, New Jersey 07920

Attn:  Daniel E. Somers

     Re:  Waiver Letters with repect to Malone Call Agreement and Stockholders
          ---------------------------------------------------------------------
          Agreement
          ---------

Dear Sir:

     Reference is made to the Agreement and Plan of Restructuring and Merger,
dated as of June 23, 1998 (the "Merger Agreement"), among AT&T Corp. ("AT&T"),
Italy Merger Corp. and Tele-Communications, Inc. ("TCI").  Capitalized terms not
defined herein shall have the meanings ascribed thereto in the Merger Agreement.

     In connection with a loan to John C. Malone, the lenders have requested
that TCI execute a waiver letter in the form attached hereto with respect to
that certain Call Agreement dated as of February 9, 1998 and a waiver letter in
the form attached hereto with respect to that certain Stockholders' Agreement
dated as of February 9, 1998 (collectively, the "Malone Waiver Letters").

     AT&T hereby consents to the execution of the Malone Waiver Letters.  Such
consent shall not be deemed to amend, modify or waive any provision of the
Voting Agreement, dated as of June 23, 1998, as amended and restated as of
October 9, 1998, among AT&T, John C. Malone and Leslie Malone.

     Except as amended or modified as provided herein, the Merger Agreement is
hereby ratified, confirmed and adopted in all respects.



                             Page 111 of 112 Pages
<PAGE>
 
     If the foregoing is acceptable to you, please execute a copy of this letter
and return it to the undersigned, at which time this letter will constitute a
binding agreement between us.

                                          Sincerely,

                                          TELE-COMMUNICATIONS, INC.



                                           By:  /s/ Leo J. Hindery, Jr.
                                                -----------------------
                                                Name:  Leo J. Hindery, Jr.
                                                Title: President

Accepted and Agreed:

AT&T CORP.



By:  /s/ Marilyn J. Wasser
     --------------------------
     Name: Marilyn J. Wasser
     Title:

ITALY MERGER CORP.



By:  /s/ Marilyn J. Wasser
     --------------------------
     Name: Marilyn J. Wasser
     Title:



                             Page 112 of 112 Pages


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