At Command Descriptions - ZyXEL Communications omni TA128 User Manual

Since it is not intended for all users, the specifications and manual
for the multiplex mode will be available in a separate text file, and
will only be available in the electronic format upon request.

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
TA128. An asterisk * following a command option or value
indicates that it is a default setting when the TA is shipped.
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