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Table 4: AT Command Set Summary. The following table is from Lucent Technologies,
Host-Based Controller Modem AT Command Set, Version 1.1, June 15, 1998.
Command Description Command Description
M Monitor speaker mode \A MNP block size
N Modulation
handshake
\B Send break
O Return to online data \G Modem port flow control
P Select pulse dialing \J Adjust bits/s rate control
Q Result code control \K Set break control
T Select tone dialing \N Error control mode selection
V DCE response format \Q Local flow control selection
W Result code option \R Ring indicator off after answer
X Result code selection
and call progress
monitoring
\T Inactivity timer
Y Long-space disconnect \V Protocol result code
Z Reset and recall stored
profile
\X XON/OFF pass through
&B V.32 auto retrain %B View numbers in blacklist
&C Data carrier detect
(DCD) control
%C Data compression control
&D Data terminal ready
(DTR
%E Automatic rate change
&F Local factory settings -C Data calling tone
&G V.22bis guard tone
control
-V90 Enable/disable V.90 settings
Table 5: The S-Register Summary. The S-registers 42 and 43 are for testing and
debugging purposes only.
Register Default Description
S0 0 Automatic answer ring number
S1 0 Ring counter
S2 43 AT escape character
S3 13 Command line termination character
S4 10 Response formatting character
S5 8 Command line editing character
S6 2 Wait before dialing
S7 50 Connection completion time-out
S8 2 Comma dial modifier time
Appendix B. Modem function B-3