Exhibit 10.18


DALLAS S. CLEMENT                                Cox Communications, Inc.
Senior Vice President                            1400 Lake Hearn Drive, N.E.
Strategy and Development                         Atlanta, Georgia 30319
                                                 (404) 843-5677
                                                 (404) 847-6029 fax
                                                 dallas.clement@cox.com


                                January 11, 2001


                                                       [COX COMMUNICATIONS LOGO]


FAX AND FEDERAL EXPRESS

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

Attention:        Marilyn Wasser, Esq.
                  Vice President -- Law and Corporate Secretary

Dear Marilyn:

         Reference is hereby made to the letter  agreement  dated March 28, 2000
among At Home Corporation,  AT&T Corp., Comcast Corporation, Cox Communications,
Inc. and certain of their respective  subsidiaries (the "Letter  Agreement") and
the term sheets attached thereto as Annexes A, B and C (collectively,  the "Term
Sheets").  Capitalized  terms used  herein and not  otherwise  defined  have the
meanings ascribed to them in the Letter Agreement and Term Sheets.

         In accordance with the terms and provisions of the Letter Agreement and
the Term Sheet  attached  thereto as Annex A ("Term  Sheet Annex A"), Cox hereby
provides  notice to AT&T of its exercise of the Put with respect to all Series A
Shares owned  directly or indirectly by Cox, which Series A Shares are presently
held by Cox @Home, Inc. ("Cox @Home").

         Cox is electing to have the  purchase  price under the Put paid in AT&T
Shares,  the precise number of which shall be calculated in accordance  with the
terms of paragraph 1(b) of Term Sheet Annex A. To facilitate such an arrangement
in accordance  with  paragraph  1(c) of Term Sheet Annex A, Cox proposes that it
exchange  its  shares of Cox @Home  with AT&T for AT&T  Shares in a  transaction
intended  to qualify  as a  tax-free  reorganization  under  Section  368 of the
Internal Revenue Code.  Based on current market  conditions Cox has assumed that
the  purchase  price  under the Put will be  calculated  on the basis of $48 per
Series A Share.



         Notwithstanding  this notice,  our primary interest continues to be the
transaction  regarding  Excite@Home  that Cox and AT&T have been considering for
the past six  months.  This  notice  is being  sent in order to  preserve  Cox's
position  in the event that Cox and AT&T are not able to agree to terms for that
preferred transaction.

         Please feel free to call me at (404) 843-5677 to discuss the foregoing.

                                                Very truly yours,

                                                COX COMMUNICATIONS, INC.


                                              By: /s/Dallas S. Clement
                                                 -------------------------------
                                                 Name:  Dallas S. Clement
                                                 Title: Senior Vice President