ZyXEL Elite 2864 User Guide - Page 111

Chapter 9 AT COMMAND SET SUMMARY An AT command is a command issued by the computer/terminal to the modem through the asynchronous computer-modem interface in asynchronous data format. AT commands control the modem's behavior and actions. To send an AT command from a computer to the modem, you must be running a communication software and the modem must be in command state. An AT command prefix (ATtention) precedes each command line, except in the case of A/, A>, and +++. A/ re-executes the last command once. A> re-executes the last command once, and repeats the last call up to 9 times until aborted by physically pressing any key on the keyboard or front panel or until a successful connection with a remote modem has been made. These commands are not preceded by AT or followed by more characters. Up to 40 commands can be entered in a command line with a single AT prefix. Be sure to either use all capital letters (AT) or none at all (at). +++ is the escape sequence code that is entered in data state to return the modem to command state. The modem will accept AT commands only while it is in command state. Basic AT Command Set A list of the basic AT command set follows. Each command should be entered after an AT prefix. A plus sign (+) placed before a command in the list indicates that it is a default setting. A + B0 B1 D Goes on-line in answer mode. (See also S39b2, S43b6) Selects ITU-T V.22 for 1200 bps communication. (Default) Selects Bell 212A for 1200 bps communication. Enters originate mode, dials the number that follows; attempts to go on-line. (See also S35b4, S38b0) Digits and modifiers that can be used with the D command: 0-9,#,* Digits for dialing. P Pulse dial. T Tone dial. W Wait for a second dial tone. (See also S6) 9-1