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AT Commands
AT command formats
5.375 x 8.375 ver 2.4.0
+++ Escape sequence
The escape sequence allows the modem to exit data mode
and enter online command mode. While in online command
mode, you can communicate directly with your modem using
AT commands. When you finish, you can return to data mode
using the ATO command.
There must be a pause after you enter an escape sequence
before any additional characters can be sent to the modem.
The length of this pause is set by Escape Guard Time (S12).
The pause prevents the modem from interpreting the escape
sequence as data.
The value of the escape sequence character may be changed
using register S2.
A/ Repeat last command
This command repeats the last command string entered. Do
not precede this command with an AT prefix nor conclude it
by pressing
Enter.
A Answer command
This command instructs the modem to go off-hook and
answer an incoming call.
Bn Communication standard setting
This command determines the communication standard—
either CCITT or Bell.
NOTE: This command is only useful for matching the modem to
slower modems. It is rarely used today.
B0 Selects CCITT V.22 mode when the modem is
at 1200 bps.