Appendix A. Manual Modem Commands; Basic At Commands - IBM PCI Data/Fax Modem User Manual

Appendix A. Manual modem commands

The following section lists commands for manually programming your
modem.
Commands are accepted by the modem while it is in Command Mode. Your
modem is automatically in Command Mode until you dial a number and
establish a connection. Commands may be sent to your modem from a PC
running communication software or any other terminal devices.
All commands sent to the modem must begin with AT and end with ENTER.
All commands may be typed in either upper or lower case, but not mixed. To
make the command line more readable, spaces may be inserted between
commands. If you omit a parameter from a command that requires one, it is
just like specifying a parameter of 0.
Example:
ATH [ENTER]
This command causes your modem to hang up.

Basic AT commands

In the following listings, all default settings are printed in bold text.
Command
A
A/
B_ B0
B1
D_
L
P
T
W
,
© Copyright IBM Corp. 2001
Function
Manually answer incoming call.
Repeat last command executed. Do not precede A/ with AT or
follow with ENTER.
CCITT mode
Bell mode
0 - 9, A-D, # and *
last number redial
pulse dialing
Note: Pulse dialling is not supported for U.K., Netherlands,
Sweden, Norway, Denmark, Finland, Switzerland, Germany,
Italy, France.
touch-tone dialing
wait for second dial tone
pause
A-1