Western Telematic APS-8M manual Common AT Commands, Command Function/Options, Dial String Modifiers

APS-8M / APS-16M Asynchronous Port Switches; User’s Guide

6.2. Common AT Commands

This section lists some of the most commonly used AT commands for the APS-8/16M’s internal modem. For a complete listing of all available AT Commands and S-Registers, please refer to the "MT5634 Modem AT Command Set" document at http://www.wti.com/guides/guidarch.htm.

Notes:

•Type commands in either upper or lower case. Do not use a combination of upper and lower case characters.

•Use the Backspace key to delete errors.

•All commands begin with the AT prefix, and are invoked by pressing [Enter]. The only exceptions are A/ (Repeat Previous Command) and +++ (Exit to on-line command mode).

•The maximum command length is 40 characters. This does not include the AT Prefix, Carriage Returns, or spaces.

•Default settings are marked with an asterisk (*).

Command Function/Options

Zn Reset Modem. Resets modem parameters to default values. Z0 Reset modem to profile saved by the last

&W command.

Z1 Same as Z0

Ds Dials telephone number s. Where s may be up to 40 characters long and may include the numbers 0-9, *, #, B, C, and D characters and the L, P, T, V, W, S, comma (,), semicolon (;), !, @, ^ and $ dial string modifiers.

Dial String Modifiers:

LRedial last number. (Must be placed immediately after ATD.)

PPulse-dial following numbers in command line.

T Tone Dial following numbers in command line.

W Wait for a new dial tone before continuing to dial

(X2, X4, X5, X6 or X7 must be selected.)

, (Comma) Pause during dialing for time set in Register S8.

; Return to command mode after dialing. (Place at end of dial string.)

! Hook Flash. Causes modem to go on-hook for one half second, then off hook again.

@ Wait for quiet answer. Causes modem to wait for a ringback, then 5 seconds of silence, before processing the next part of the command. If silence is not detected, the modem returns a NO ANSWER code.

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