At Command; At Command; Description Of At Command - AOpen ISDN SOHO Router User Manual

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6. AT COMMAND

Hayes command set is a standard for Hayes modem commands for its Smartmodem 300. Most

modem manufacturers have adopted this command set in order to have Hayes compatible. The

command set used by the Smartmodem 300, as well as most modems today (with a few additional

new advanced commands), is known as the AT command set. AT stands for attention, and is placed

in front of actual content of command so that the router knows what follows is an command

directed at the modem or router. With the exception of some "A/" and "+++" command, "AT"

command is the process to place command to the router.

Different modems or routers may have slightly different command sets, but generally speaking,

most of the routers follow the standard set by Hayes.

When you connect terminal equipment (like PC) with the router, after typing AT command ending

with [ENTER] key, TA will process the command and then return the result code to the terminal

equipment. Each AT command must starts with "AT" and end with [ENTER] key (with the

exception of "A/" and "+++" commands).

Command Format

The following is the format of AT command:

Result code has two styles (Verbose and Numeric). The following are their formats:

Result code(Numeric)

S register

The S register is used to store the settings including

auto answer mode

escape sequence character

V.110 connect speed .....etc.

ISDN Router Manual V.1.1

Command

value

Result code(Verbose)

command

value

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