FIRST AMENDMENT TO FIVE-YEAR REVOLVING CREDIT AGREEMENT
             -------------------------------------------------------


         THIS  AMENDMENT  (herein so called) is entered  into as of May 7, 2002,
among COMCAST CABLE COMMUNICATIONS,  INC., a Delaware corporation  ("Borrower"),
AT&T COMCAST CORPORATION,  a Pennsylvania  corporation  ("Parent"),  the Lenders
(herein so called) party to the Credit Agreement  (hereinafter defined) and BANK
OF AMERICA,  N.A., as Administrative  Agent (as defined in the Credit Agreement)
for the Lenders.

         Borrower,  Lenders and Administrative  Agent are party to the Five-Year
Revolving Credit Agreement dated as of August 24, 2000 (the "Credit Agreement"),
and have agreed,  upon the following terms and  conditions,  to amend the Credit
Agreement  in  certain  respects,  and as so  amended,  to  restate  the  Credit
Agreement.  Accordingly, for valuable and acknowledged consideration,  Borrower,
Parent, Lenders and Administrative Agent agree as follows:

         1. Terms and References. Unless otherwise stated in this Amendment, (a)
terms defined in the Credit  Agreement  have the same meanings when used in this
Amendment,  and (b) references to "Sections",  "Schedules" and "Exhibits" are to
the Credit Agreement's sections, schedules and exhibits.

         2.  Amendment  and  Restatement.  Effective on the  Effective  Date (as
defined in the  Amended  and  Restated  Credit  Agreement),  but  subject to the
satisfaction  of the  conditions  precedent  set  forth in  Paragraph  4 of this
Amendment,  the Credit  Agreement is amended and, as so amended,  is restated to
read in its  entirety as in Annex I attached  hereto (the  "Amended and Restated
Credit Agreement"). Notwithstanding anything to the contrary contained herein or
in any other Loan Document, no liability, right, remedy or claim shall arise, be
asserted  or be  enforceable  (i) at any time as against  any AT&T Party or (ii)
prior to the  Effective  Date (as  defined in the Amended  and  Restated  Credit
Agreement), as against any AT&T Broadband Party, in each case by or on behalf of
Administrative  Agent, any Lender,  Borrower or any Guarantor (as defined in the
Amended and Restated  Credit  Agreement),  in respect of the  Obligations,  this
Agreement or any other Loan Document, all such liabilities, rights, remedies and
claims, if any, being expressly  waived. As used herein,  (x) "AT&T Party" shall
mean AT&T Corp., a New York  corporation,  or any of its  Subsidiaries or any of
the respective officers, directors, employees,  representatives or agents of any
of the foregoing,  other than any AT&T Broadband  Party and (y) "AT&T  Broadband
Party"  shall  mean  AT&T  Broadband  Corp.,  a  Delaware  corporation,  and its
Subsidiaries.

         3. Conditions  Precedent to Effectiveness of Amendment.  This Amendment
shall not be effective until  Administrative  Agent receives (a) counterparts of
this Amendment executed by Borrower, Parent, Required Lenders and Administrative
Agent,   (b)  unless   waived  by   Administrative   Agent,   such  evidence  as
Administrative  Agent may request to verify that  Borrower has paid all Attorney
Costs of Administrative  Agent to the extent invoiced prior to or on the date of
the effectiveness of this Amendment,  and (c) such other customary certificates,
documents or opinions as Administrative Agent or Required Lenders reasonably may
require.

         4. Conditions Precedent to Amendment and Restatement. The amendment and
restatement of the Credit Agreement pursuant to this Amendment is subject to the
satisfaction, on or before March 31, 2003, of the following conditions precedent
(unless  otherwise  defined in this  Paragraph 4, each defined term used in this
Paragraph 4 has the meaning  given such term in the Amended and Restated  Credit
Agreement):

                  (a) Unless  waived by all Lenders,  receipt by  Administrative
         Agent of each of the  following,  each of which shall be  originals  or
         facsimiles (followed promptly by originals) unless otherwise specified,


                                        1



         each properly executed by a Responsible  Officer,  each dated on, or in
         the case of third-party  certificates,  recently before,  the Effective
         Date and  each in form and  substance  satisfactory  to  Administrative
         Agent and its legal counsel:

                           (i) Executed counterparts of the Guarantee Agreement,
                  executed and delivered by each Guarantor;

                           (ii) Such certificates of resolution or other action,
                  incumbency   certificates   and/or   other   certificates   of
                  Responsible  Officers  of each  Loan  Party as  Administrative
                  Agent may request to establish  the  identities  of and verify
                  the authority and capacity of each Responsible Officer of each
                  Loan Party authorized to act as a Responsible  Officer of each
                  Loan Party with respect to this  Amendment and the Amended and
                  Restated Credit Agreement;

                           (iii)  Such  evidence  as  Administrative  Agent  may
                  request to verify  that each Loan Party is duly  organized  or
                  formed,  validly  existing,  in good standing and qualified to
                  engage  in  business  in  each  jurisdiction  in  which  it is
                  required  to be  qualified  to engage in  business,  including
                  certified   copies  of  its   organizational   documents   and
                  certificates of good standing and/or  qualification  to engage
                  in business;

                           (iv) A certificate signed by a Responsible Officer of
                  Borrower  certifying  (x) that  the  conditions  specified  in
                  Paragraphs   4(h)  and  4(i)  of  this   Amendment  have  been
                  satisfied,  (y) that  there has been no event or  circumstance
                  since  December 31, 2001 that has a Material  Adverse  Effect,
                  and (z) as to the Debt  Ratings of Parent as of the  Effective
                  Date;

                           (v) An opinion of counsel to the Loan Parties in form
                  and substance reasonably satisfactory to Administrative Agent;
                  and

                           (vi) Such other customary certificates,  documents or
                  opinions  as  Administrative  Agent or  Required  Lenders  may
                  reasonably require.

                  (b)  Prior  to  or  substantially   simultaneously  with  such
         amendment and restatement, Comcast Corporation and Broadband shall have
         merged into separate, wholly-owned subsidiaries of Parent in accordance
         with  the  terms  of  the  Merger  Agreement,  the  other  Transactions
         contemplated  by the Merger  Agreement  shall have been  consummated in
         accordance with the terms of the Merger Agreement,  and no provision of
         the Merger Agreement shall have been waived,  amended,  supplemented or
         otherwise  modified in any manner  which is  materially  adverse to the
         interests of Lenders.

                  (c)  All  material  governmental  and  third  party  approvals
         necessary in connection with the Transactions and the financing thereof
         shall  have been  obtained  and be in full  force and  effect,  and all
         applicable  waiting periods shall have expired without any action being
         taken or  threatened by any competent  authority  that would  restrain,
         prevent  or  otherwise  impose  materially  adverse  conditions  on the
         Transactions or the financing thereof.

                  (d) Lenders shall have received the Reference Statements.

                  (e) Borrower  shall have  delivered a  satisfactory  pro forma
         consolidated  balance sheet of (i) Parent and its Subsidiaries and (ii)
         the  Restricted  Group,  in each case as at the date of the most recent
         consolidated  balance  sheet  of  Borrower  included  in the  Reference
         Statements,  adjusted  to  give  effect  to  the  consummation  of  the

                                       2




         Transactions  and the  financing  thereof as if such  transactions  had
         occurred on such date.

                  (f) The organizational and capital structure of Parent and its
         Subsidiaries,  including the liabilities of the Subsidiaries of Parent,
         shall be  substantially  as described in the  Confidential  Information
         Memorandum dated March, 2002.

                  (g)  Parent's   Debt  Rating,   after  giving  effect  to  the
         consummation of the  Transactions and the financing  thereof,  shall be
         BBB- or better by S&P and Baa3 or better by Moody's.

                  (h) The representations and warranties made by Borrower in the
         Amended  and  Restated  Agreement,   or  which  are  contained  in  any
         certificate,  document or financial or other statement furnished at any
         time under or in  connection  with the Amended and Restated  Agreement,
         shall be correct in all  material  respects on and as of the  Effective
         Date.

                  (i) No Default or Event of Default  shall have occurred and be
         continuing on the Effective Date.

                  (j) Unless waived by Administrative Agent, Borrower shall have
         paid all Attorney Costs of Administrative  Agent to the extent invoiced
         prior to or on the Effective Date.

                  (k) The Effective Date (as defined in the Parent Revolving and
         Term Credit Agreement) shall have occurred.

         5. Representations. Borrower represents and warrants to Lenders that as
of the date of this Amendment,  (a) the representations and warranties contained
in Section 5 are correct in all material respects and (b) no Default or Event of
Default has occurred and is continuing.

         6. Effect of Amendment.  This Amendment is a Loan  Document.  Except as
expressly modified and amended by this Amendment,  all of the terms,  provisions
and  conditions of the Loan Documents  shall remain  unchanged and in full force
and effect. The Loan Documents and any and all other documents  heretofore,  now
or  hereafter  executed  and  delivered  pursuant  to the  terms  of the  Credit
Agreement are hereby amended so that any reference to the Credit Agreement shall
mean a reference to the Credit Agreement as amended hereby.

         7.  Expenses.  Borrower  shall  pay all  reasonable  costs,  fees,  and
expenses  paid  or  incurred  by  the  Administrative  Agent  incident  to  this
Amendment,  including,  without limitation,  the reasonable fees and expenses of
the   Administrative   Agent's  counsel  in  connection  with  the  negotiation,
preparation,   delivery,  and  execution  of  this  Amendment  and  any  related
documents.

         8.  Miscellaneous.  Unless stated  otherwise  herein,  (a) the singular
number  includes the plural and vice versa and words of any gender  include each
other gender, in each case, as appropriate,  (b) headings and captions shall not
be construed in interpreting  provisions of this  Amendment,  (c) this Amendment
shall be governed by and construed in  accordance  with the internal laws of the
State of New York,  (d) if any part of this Amendment is for any reason found to
be  unenforceable,   all  other  portions  of  it  shall   nevertheless   remain
enforceable,  (e) this  Amendment may be executed in any number of  counterparts
with the same effect as if all signatories had signed the same document, and all
of those  counterparts  shall  be  construed  together  to  constitute  the same
document,  and (f) this Amendment and the Credit  Agreement,  as amended by this
Amendment,  constitute the entire agreement and understanding  among the parties
hereto and supercede any and all prior  agreements and  understandings,  oral or
written, relating to the subject matter hereof.


                                       3



         9. Parties. This Amendment binds and inures to the benefit of Borrower,
Administrative  Agent,  Lenders,  and their respective  permitted successors and
assigns,  and  also  inures  to the  benefit  of the AT&T  Parties  and the AT&T
Broadband  Parties as  provided in the second  sentence  of  Paragraph 2 of this
Amendment.

                     [REMAINDER OF PAGE INTENTIONALLY BLANK.
                            SIGNATURE PAGES FOLLOW.]






                                       4



         Signature Page to that certain  Five-Year  Revolving  Credit  Agreement
dated as of the date first set forth above, among Comcast Cable  Communications,
Inc., as Borrower, AT&T Comcast Corporation, as Parent, each Lender, and Bank of
America, N.A., as Administrative Agent.



                                                                   
COMCAST CABLE COMMUNICATIONS, INC., as Borrower                       CITIBANK, N.A., as a Lender


By:      /s/ Kenneth Mikalauskas                                      By:  /s/ Carolyn A. Kee
         -----------------------------------------------------             ---------------------------------------------------------
     Kenneth Mikalauskas, Vice President - Finance                         Carolyn A. Kee, Vice President


AT&T COMCAST CORPORATION,                                             BARCLAYS BANK PLC, as a Lender
as Parent

                                                                      By:  /s/ Timothy C. Harrington
By:  /s/ Arthur R. Block                                                   ---------------------------------------------------------
     ---------------------------------------------------------             Timothy C. Harrington, Director
     Arthur R. Block, Senior Vice President

                                                                      WACHOVIA BANK, NATIONAL ASSOCIATION, as a Lender
BANK OF AMERICA, N.A., as
Administrative Agent and as a Lender
                                                                      By:  /s/ John D. Brady
                                                                           ---------------------------------------------------------
By:  /s/ Todd Shipley                                                      John D. Brady, Director
     ---------------------------------------------------------
     Todd Shipley, Managing Director
                                                                      FLEET NATIONAL BANK, as a Lender

JPMORGAN CHASE BANK, as a Lender
                                                                      By:  /s/ Michael Elwell
                                                                           ---------------------------------------------------------
By:  /s/ Tracey Navin Ewing                                                Michael Elwell, Vice President
     ---------------------------------------------------------
     Tracey Navin Ewing, Vice President
                                                                      PNC BANK, NATIONAL ASSOCIATION, as a Lender

THE BANK OF NEW YORK, as a Lender
                                                                      By:  /s/ Daniel Isaacs
                                                                           ---------------------------------------------------------
By:  /s/ Michael E. Masters                                                Daniel Isaacs, Commercial Banking Officer
     ---------------------------------------------------------
     Michael E. Masters, Assistant Vice President
                                                                      THE BANK OF NOVA SCOTIA, as a Lender
MIZUHO CORPORATE BANK, LTD., as a Lender

                                                                      By:  /s/ Brenda S. Insull
By:  /s/ Raymond Ventura                                                   ---------------------------------------------------------
     ---------------------------------------------------------             Brenda S. Insull, Authorized Signatory
     Raymond Ventura, Senior Vice President




         Signature Page to that certain  Five-Year  Revolving  Credit  Agreement
dated as of the date first set forth above, among Comcast Cable  Communications,
Inc., as Borrower, AT&T Comcast Corporation, as Parent, each Lender, and Bank of
America, N.A., as Administrative Agent.


SUNTRUST BANK, as a Lender                                            BANK OF TOKYO-MITSUBISHI TRUST COMPANY, as a Lender


By:  /s/ J. Eric Millham                                              By:  /s/ Mark R. Marron
     ---------------------------------------------------------             ---------------------------------------------------------
     J. Eric Millham, Director                                             Mark R. Marron, Vice President & Manager


DEUTSCHE BANK AG NEW YORK BRANCH, as a Lender                         BAYERISCHE LANDESBANK GIROZENTRALE,
                                                                      CAYMAN ISLANDS BRANCH, as a Lender

By:  /s/ William W. McGinty
     ---------------------------------------------------------        By:  /s/ Peter Obermann
     William W. McGinty, Director                                          ---------------------------------------------------------
                                                                           Peter Obermann, Senior Vice President

By:  /s/ Christopher S. Hall
     ---------------------------------------------------------        By:  /s/ Matthew DeCarlo
     Christopher S. Hall, Managing Director                                ---------------------------------------------------------
                                                                           Matthew DeCarlo, Second Vice President

WESTDEUTSCHE LANDESBANK GIROZENTRALE,
NEW YORK BRANCH, as a Lender                                          LLOYDS TSB BANK PLC, as a Lender


By:  /s/ Lucie Guernsey                                               By:  /s/ Windsor R. Davies
     ---------------------------------------------------------             ---------------------------------------------------------
     Lucie Guernsey, Director                                              Windsor R. Davies, Director,
                                                                           Corporate Banking, USA

By:  /s/ Lisa Walker
     ---------------------------------------------------------        By:  /s/ Lisa Maguire
     Lisa Walker, Associate Director                                       ---------------------------------------------------------
                                                                           Lisa Maguire, Assistant Vice President

SUMITOMO MITSUI BANKING CORPORATION, as a Lender
                                                                      LEHMAN COMMERCIAL PAPER INC., as a Lender

By:  /s/ Leo E. Pagarigan
     ---------------------------------------------------------        By:  /s/ G. Andrew Keith
     Leo E. Pagarigan, Vice President                                      ---------------------------------------------------------
                                                                           G. Andrew Keith, Authorized Signatory

MELLON BANK, N.A., as a Lender


By:  /s/ Alexander M. Gordon
     ---------------------------------------------------------
     Alexander M. Gordon, Assistant Vice President





         Signature Page to that certain  Five-Year  Revolving  Credit  Agreement
dated as of the date first set forth above, among Comcast Cable  Communications,
Inc., as Borrower, AT&T Comcast Corporation, as Parent, each Lender, and Bank of
America, N.A., as Administrative Agent.



BNP PARIBAS, as a Lender                                              DRESDNER BANK AG, NEW YORK AND
                                                                      GRAND CAYMAN BRANCHES, as a Lender

By:  /s/ Serge Desrayaud
     ---------------------------------------------------------        By:  /s/ Brian E. Haughney
     Serge Desrayaud, Managing Director Media                              ---------------------------------------------------------
     & Telecomm Finance Group                                              Brian E. Haughney, Vice President


By:  /s/ Ola Anderssen                                                By:  /s/ William E. Lambert
     ---------------------------------------------------------             ---------------------------------------------------------
     Ola Anderssen, Director                                               William E. Lambert, Vice President


PB CAPITAL CORPORATION, as a Lender                                   ALLFIRST BANK, as a Lender


By:  /s/ Thomas Dearth                                                By:  /s/ Timothy A. Knabe
     ---------------------------------------------------------             ---------------------------------------------------------
     Thomas Dearth, Associate                                              Timothy A. Knabe, Vice President


By:  /s/ Jeffrey Frost                                                CREDIT SUISSE FIRST BOSTON, as a Lender
     ---------------------------------------------------------
     Jeffrey Frost, Managing Director Portfolio
     Management                                                       By:  /s/ Paul J. Corona
                                                                           ---------------------------------------------------------
                                                                           Paul J. Corona, Director
ARAB BANK PLC, as a Lender

                                                                      By:  /s/ Cassandra Droogan
By:  /s/ Samer Tamimi                                                      ---------------------------------------------------------
     ---------------------------------------------------------             Cassandra Droogan, Associate
     Samer Tamimi, Vice President

                                                                      U.S. BANK NATIONAL ASSOCIATION, as a Lender
BANK ONE, NA, as a Lender

                                                                      By:  /s/ Jaycee Earll
By:  /s/ Curtis R. Worthington                                             ---------------------------------------------------------
     ---------------------------------------------------------             Jaycee Earll, Assistant Vice President
     Curtis R. Worthington, Associate Director

                                                                      MERRILL LYNCH CAPITAL CORPORATION, as a Lender


                                                                      By:  /s/ Zoran Fotak
                                                                           ---------------------------------------------------------
                                                                           Zoran Fotak, Managing Director







         Signature Page to that certain  Five-Year  Revolving  Credit  Agreement
dated as of the date first set forth above, among Comcast Cable  Communications,
Inc., as Borrower, AT&T Comcast Corporation, as Parent, each Lender, and Bank of
America, N.A., as Administrative Agent.




FIRST TENNESSEE BANK NATIONAL ASSOCIATION, as a Lender


By:  /s/ James H. Atchley
     ---------------------------------------------------------
     James H. Atchley, Senior Vice President









                                     ANNEX I

                  FORM OF AMENDED AND RESTATED CREDIT AGREEMENT










































                    Annex I to First Amendment to Five-Year Credit Agreement