Exhibit 4

0071-EX-PL-2005 Text Documents

AT&T; CORP.

2005-02-23ELS_69415

                                   AT&T CORP.

                                       Exhibit 4


Response to Item 10:

No more than 20 base station sectors and 30 subscriber units will be deployed in each
state of Pennsylvania and Georgia. Some or all of the following manufacturers and
models of WiMAX and pre-WiMAX equipment may be deployed.



                  Manufacturer           Model           Experimental

                  AirSpan         ASWipLL 700                 No
                                  ASWipLL MMDS                No
                                  ASWipLL 3.5 FDD             No
                                  ASWipLL 3.45 FDD            No
                                  ASWipLL 3.45 TDD            No
                                  ASWipLL 3.55 TDD            No

                  Alvarion        BreezeMAX 3.5a1             No
                                  BreezeMAX 3.5b              No

                  Redline         AN-100                      No
                                  TB343517                    No
                                  TS343517                    No



Document Created: 2005-02-23 14:39:55
Document Modified: 2005-02-23 14:39:55

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