I am not sure I understand what you are asking. It sounds like you are having trouble learning codes for an AT&T digital cable box (probably the General Instruments DCT-2000) into the T2.
I remember the first time I tried to learn a command into the T2 that I had some problems. It claimed that it learned the signal, but when I tested it nothing worked. It took a while to get the angles of holding the remotes before the learning was actually successful. I suggest experimenting with this if you are still having problems.
Actually, if you really are trying to use a GI cable box, you may want to try looking in the General Instruments section of RTI's site as they have some codes listed for the cable box.
[Link: rticorp.com]Good Luck!
Will