Actiontec electronic 56K V.90 manual AT Commands, ATXn, +++ Escape sequence, Repeat Last Command

AT Command Set

AT Commands

AT commands are issued to the modem to control the modem’s operation and soft- ware configuration. AT commands are commonly entered from a terminal program such as HyperTerminal, and can only be entered while the modem is in command mode. To enter an AT command, type:

ATXn

where X is the AT command, and n is the specific value for that command. Press

ENTER.

Commands are acknowledged with either text or numeric value response known as a result code. In the case of multiple AT commands on the same command line, the commands are executed in the order they are received. Should execution of a com- mand result in an error, or a character not be recognized as a valid command, execu- tion is terminated, the remainder of the command line is ignored, and the ERROR result code is issued. If all commands execute correctly, only the result code associ- ated with the last command shall be issued, even though all have been executed.

In the following listing all commands and command values accepted by the modem are shown. Any entries other than those shown cause the ERROR result code.

+++Escape sequence

The escape sequence allows the modem to exit data mode and enter on-line com- mand mode. While in on-line command mode, you may communicate directly to your modem using AT commands. Once you are finished, you may return to data mode using the ATO command. A pause, the length of which is set by the Escape Guard Time S-Register (S12--See the “S-Registers Reference” section of this manual for details), must be used after an escape sequence is issued. This pause prevents the modem from interpreting the escape sequence as data. The value of the escape se- quence character may be changed using Register S2.

A/ Repeat Last Command

This command repeats the last command string entered. Do not precede this com- mand with an AT prefix or conclude it by pressing Enter.

A Answer Command

This command instructs the modem to go off-hook and answer an incoming call.

40