User`s guide

6.2. Common AT Commands
This section lists some of the most commonly used AT
commands for the APS-8M's internal Multi-Tech modem. For a
complete listing of all available AT Commands and S-Registers,
please refer to http://www.wti.com/guides/guidearch.htm, or
access the modem command mode, and display the modem help
screen using the $Hn command.
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] (Carriage Return).The
only exceptions are the A/ command (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
$Hn Help Screen.
$H1 Help Screen #1.
$H2 Help Screen #2.
$H3 Help Screen #3.
Z Reset Modem. All configuration parameters are reset
to default values.
, (Comma) Pause. Creates pause during dialing. The
duration of the pause is determined by Register S6.
/ (Slash) Pause for 125 MS.
: (Colon) Continuous Redial.
; (Semicolon) Return to Command Mode after dialing.
! (Exclamation) Causes modem to flash on-hook.
@ Quiet Mode. Causes modem to wait for ringback,
followed by five seconds of silence before processing
next command.
6-2
APS-8M User’s Guide