User guide

Chapter 1: Introduction and Product Description
Multi-Tech Systems, Inc. CallFinder GSM Cellular Gateway 8
AT Commands
The AT commands listed below are those supported by the CallFinder CF100 unit when its VOICE/DATA
switch is in the VOICE position. These are Multi-Tech-specific AT commands.
Command Values Description
ATI -- Returns model number of CallFinder unit.
ATI1 -- Returns CallFinder’s software version.
AT&F -- Resets parameter values to factory defaults.
AT>AD=
p
<cr>
p
= 0 or 1
p
= 0/1 turns autodial feature off/on. CallFinder must be set to
FXO and connected to a station port (extension) of the PBX. If
autodial feature is enabled and a party at another PBX extension
calls the CallFinder extension, the CallFinder will answer the call
and will immediately direct it to the number, n, specified in the
command ATDnA<cr>. Typically, the auto-dialed number would be
on the cellular network to which the CallFinder is subscribed, but
the destination could be any number (up to 10 digits).
ATDnA<cr> n is phone
number of
up to 10
digits
This command specifies the number to which the autodial call
w
ill
be directed.
AT>AD?<cr> -- Reports the status (off/on) of the autodial function and the stored
phone number.
AT>FXS -- Sets unit to FXS mode.
AT>FXO -- Sets unit to FXO mode.
AT>HFX=0 0 HFX function is off.
AT>HFX=1 1 Used in voice mode. Causes CallFinder port to open tip and ring
for 4 seconds and causes the PBX port to disconnect when the
cellular side hangs up.
AT>HFX=2 2 Used in voice mode. Causes CallFinder port to open tip and ring
for 1.2 seconds and causes the PBX port to disconnect when the
cellular side hangs up.
AT>SPK= 0-4 Sets audio output level.
AT>MIC= 0-7 Sets audio input gain.
AT>CID= 0, 1 Turns on/off Caller ID signaling. 0= off; 1= on.
AT>MAX= 0-99 Sets Maximum call time. 0 = feature off;
1-99 = time limit in seconds.
AT>LR=0 Turns off both line reversal features.
AT>LR=1 Turns on billing line reversal feature.
AT>LR=2 Turns on ‘disconnect-on-line-reversal’ feature.
AT>LR=3 Turns on both line reversal features.
Query Commands
AT>fx? Returns FXS or FXO, depending on the current setting of the
telephony interface parameter.
AT>lr? Returns 0, 1, 2, or 3, depending on the current setting of the line
reversal feature.
AT>CID? Returns CallFinder unit’s status (0= off; 1= on) with regard to Caller
ID, that is, whether the Caller ID function is active or not.
Wireless CallFinder Models and the VOICE/DATA Switch
Configuration with AT commands must be done with the switch in the VOICE position. There is no current
use for the DATA setting. The DATA portion of this switch is available for future development.