At Command Descriptions; Basic "At" Command Set - ZyXEL Communications ACCESSING INTERNET & INTRANET omni series User Manual

AT Command Descriptions

An AT Command is a command in asynchronous data format issued
by the computer to the TA through the asynchronous computer-
modem interface. AT Commands control the TA's behavior and
actions. To send an AT Command from a computer to the TA, you
must be running communication software and the TA must be in the
command state.
Exceptions to this are A/, A>, and +++. These commands are not
preceded by AT, or followed by any more characters:
A/ - re-executes the last command once.
A> - re-executes the last command once or repeats the last call
up to 9 times until aborted by pressing down on any key on the
keyboard or front panel or until a successful connection with a
remote TA has been made.
+++ - is the escape sequence code that is entered in data state to
return the TA to command state. The TA will accept AT
commands only while it is in command state.
The AT command prefix may be typed in either upper 'AT' or lower
case 'at'. Do not use a combination of upper and lower cases in the
prefix.
The following tables list all of the AT commands supported by the
omni. An asterisk * following a command option or value indicates
that it is a default setting when the TA is shipped.

Basic "AT" Command Set

Command Options Function & Description
A/ Re-execute the last command once
AT Command Set Reference 109
Ref.