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NetComm Roadster Series 56K USB Modem
Commands
Most people use the communication software programs to tell modems what to do. Therefore, you may not use the commands in this
chapter. However, if you prefer to communicate with your modem directly, you can type the commands described below.
Here describes how to work in the terminal mode.
Typing Commands
• Use the BACKSPACE key to delete typing errors.
• Every command (except A/ and +++) must begin with the AT or at prex and be entered by pressing the <Enter> key.
• When you see an n, replace the n with one of the letter or numeric options listed for that command. For example, for the En
command, you might type ATE1.
Basic AT Command Guide
+++Escape Sequence
An escape sequence allows the modem to exit data mode and enter on-line command mode. While in on-line command mode, AT
commands are sent directly to the modem. Use the return to on-line data mode command
(see O<value>—Return to On-Line Data Mode) to return to data mode.
Place a pause before and after the escape sequence to prevent the modem from interpreting the escape sequence as data. The length of
the pause is set by register S12 (see S12—Escape Guard Time), the escape guard time. Register S2 (see S2—AT Escape Character (User-
Dened)) identies the escape sequence character.
A/—Repeat Last Command
Use this command to repeat the last AT command. The modem repeats the command currently in the command buffer. Do not use the AT
prex with this command. Do not conclude the commands with a terminating character such as enter.
A—Answer
This command instructs the soft modem to go off-hook and answer an incoming call.
E<value>—Command Echo
Use this command to instruct the modem to echo characters sent to it. When the echo feature is selected, characters sent to the modem
are sent back to the host and displayed on the monitor.
Result codes:
_ OK if <value> = 0—1.
_ ERROR if <value> 0—1.
Command Function
E0 Disables echo command.
E1 Enables echo command (default).