At Command Descriptions - NETGEAR XM128 ISDN Reference Manual

Reference Guide for the Model XM128 ISDN Digital Modem

AT Command Descriptions

The AT command is a command in asynchronous data format issued by the computer to the Model
XM128 modem through the asynchronous computer-modem interface. AT commands control the
behavior and actions of the modem.
To send an AT command from a computer to the Model XM128 modem, the following rules apply:
• You must be running a communication software.
• The modem must be in the command state.
The commands A/, A>, and +++ are exceptions. These commands are not preceded by AT or
followed by any more characters.
• The AT command prefix can be typed in either uppercase letters (AT) or lowercase letters (at).
Do not combine uppercase and lowercase letters in the prefix.
Table C-1, Table C-2,
XM128 modem. An asterisk (*) following a command option or value indicates that it is a default
setting when the Model XM128 modem is shipped.
Table C-1. Basic AT command set
Command Options
A/
A>
Pressing any
key
+++
A
C-2
Table C-3, and Table C-4
Function and description
Re-executes the last command once.
Reexecutes the last command once or repeats the last call up to 9 times. You
can abort this command by pressing down on any key on the keyboard or front
panel. This command is also aborted when a successful connection with a
remote modem is made. See also S-register S8. For a description of Basic
S-registers, refer to Table D-3 on page D-4 in Appendix D, "Status Registers
and Result Codes."
Terminates the current connection attempt when any key is pressed.
Exits the data transfer state and begins the command entry state.
Goes online in answer mode. See also S-registers 39.2 and S43.6. For a
description of Extended S-registers, refer to Table D-4 on page D-5 in
Appendix D, "Status Registers and Result Codes."
list the AT commands supported by the Model
Table C-1 lists the basic AT command set.
AT Command Set Reference