Using At&T C - Zoom ISDN TA/V.34 Owner's Manual

Using AT&T Custom 5ESS Switch
Unlike the National ISDN and Northern Telecom switches, the AT&T
switch may not require SPIDs.
Restore factory defaults:
Set switch type to 5ESS:
Set Directory numbers: (DN1 may be the same as DN2 for the
AT&T switch)
Set Service Profile Identifiers (SPIDs):
Note For 5ESS you must clear the SPIDs by typing
AT!C2="" AT!C6=""
Store settings and reset device:
58
AT&F
AT!C0=0
AT!N1="[DN1]"
AT!N2="[DN2]"
AT!C2="[SPID1]"
AT!C6="[SPID2]"
AT&W
AT%Z1
TA/V.34 and TA Owner' s Manual