Appendix A. Manual Modem Commands; Basic At Commands - Lenovo ThinkCentre A57 9702 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 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]

Basic AT commands

In the following listings, all default settings are printed in bold text.
© Copyright Lenovo 2007, 2009
Command
A
A/
D_
L
P
T
W
,
@
!
;
DS=n
E_ E0
E1
+++
H_ H0
Function
Manually answer incoming call.
Repeat last command executed. Do not
precede A/ with AT or follow with ENTER.
0 - 9, A-D, # and *
last number redial
pulse dialing
Note: Pulse dialing is not supported for
Australia, New Zealand, Norway, and South
Africa.
touch-tone dialing
wait for second dial tone
pause
wait for five seconds of silence
flash
return to Command Mode after dialing
Dial one of the four telephone numbers
(n=0-3) stored in the modem non-volatile
memory.
Commands are not echoed
Commands are echoed
Escape Characters - Switch from Data Mode
to Command Mode (T.I.E.S. Command)
Force modem on-hook (hang up)
59