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Appendix A. Manual modem commands
This appendix provides 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 can 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 can be typed in either upper or lower case, but not mixed. To make the
command line more readable, spaces can 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]
Note: In the following tables, all default settings are printed in bold text.
Basic AT commands
Command Function
A Manually answer incoming call.
A/ Repeat last command executed. Do not
precede A/ with AT or follow with ENTER.
D_ 0 - 9, A-D, # and *
L last number redial
P pulse dialing
Note: Pulse dialing is not supported for
Australia, New Zealand, Norway, and South
Africa.
T touch-tone dialing
W wait for second dial tone
, pause
@ wait for five seconds of silence
! flash
; return to Command Mode after dialing
DS=n Dial one of the four telephone numbers
(n=0-3) stored in the modem non-volatile
memory.
E_ E0 Commands are not echoed
E1 Commands are echoed
+++ Escape Characters - Switch from Data Mode
to Command Mode (T.I.E.S. Command)
H_ H0 Force modem on-hook (hang up)
© Lenovo 2005, 2007. Portions © IBM Corp. 2005. 65