Filed by Comcast Corporation
                                                 Pursuant to Rule 425 under the
                                              Securities Act of 1933 and deemed
                                            filed pursuant to Rule 14a-12 under
                                            the Securities Exchange Act of 1934

                                                    Subject Company: AT&T Corp.
                                                     Commission File No. 1-1105

                                                       Date: September 28, 2001

         The following press release was issued by Comcast Corporation:

[COMCAST LOGO]                                                   PRESS RELEASE



PHILADELPHIA - September 28, 2001 - Comcast Corporation (Nasdaq: CMCSA, CMCSK)
today announced that, in connection with discussions regarding AT&T Broadband,
it has entered into a reciprocal confidentiality agreement with AT&T that will
permit the exchange of information between the two companies. The agreement
also restricts certain discussions between Comcast and third parties which
relate to AT&T Broadband without AT&T's approval.

Comcast Corporation ( is principally involved in the
development, management and operation of broadband cable networks, and in the
provision of electronic commerce and programming content. Comcast Cable is the
third largest cable company in the United States serving more than 8.4 million
cable subscribers. Comcast's commerce and content businesses include majority
ownership of QVC, Comcast-Spectacor, Comcast SportsNet and The Golf Channel, a
controlling interest in E! Networks, and other programming investments.
Comcast's Class A Special and Class A Common Stock are traded on The Nasdaq
Stock Market under the symbols CMCSK and CMCSA, respectively.

This press release contains forward-looking statements. Readers are cautioned
that such forward-looking statements involve risks and uncertainties that
could significantly affect actual results from those expressed in any such
forward-looking statements. Readers are directed to Comcast's Quarterly Report
on Form 10-Q for a description of such risks and uncertainties.

                                     # # #

Investor Contact:
Marlene S. Dooner, Vice President, Investor Relations          (215) 981-7392
William E. Dordelman, Vice President, Finance                  (215) 981-7550
Kelley L. Claypool, Manager, Investor Relations                (215) 981-7729

Media Contact:
The Abernathy MacGregor Group                                  (212) 371-5999
Adam Miller, Steve Frankel, Brian Faw


   Note: The following notice is included to meet certain legal requirements:

                             ADDITIONAL INFORMATION

         Subject to future developments, Comcast may file with the Commission
(i) a preliminary proxy statement for solicitation of proxies from the
shareholders of AT&T Corp. ("AT&T") in connection with an AT&T Broadband
transaction and (ii) a registration statement to register any Comcast shares
issued in such transaction. Investors and security holders are urged to read
the proxy statement and registration statement (when and if available) and any
other relevant documents filed with the Commission, as well as any amendments
or supplements to those documents, because they will contain important
information. Investors and security holders may obtain a free copy of the proxy
statement and the registration statement (when and if available) and other
relevant documents at the Commission's Internet web site at The
proxy statement and registration statement (when and if available) and such
other documents may also be obtained free of charge from Comcast by directing
such request to: Comcast Corporation, 1500 Market Street, Philadelphia,
Pennsylvania 19102-2148, Attention: General Counsel.

         Comcast, its directors and certain other Comcast employees and
advisors may be deemed to be "participants" in a solicitation of proxies from
AT&T's shareholders. A detailed list of the names, affiliations and interests
of the participants in the solicitation is contained in a filing made by
Comcast with the Commission pursuant to Rule 14a-12 on July 9, 2001.