User guide

Multi-Tech Systems, Inc. CallFinder GSM Cellular Gateway 4
Chapter 1 – Introduction and Product
Description
Introduction
This User Guide describes the CallFinder ® Cellular Gateway: the CF100FX2-G; a GSM model with connectors
for both the FXS and FXO telephony interfaces.
The CallFinder cellular gateway connects to a PBX trunk line, a PBX extension line, or to a single PSTN (POTS)
line. It routes incoming and outgoing calls through the wireless network. Users can take advantage of the lower
costs that cellular networks offer under certain circumstances (like free calling between cellular phones from the
same provider, and free/reduced costs for weekend and night-time calls initiated on cellular phones). The
CallFinder can also be used to bring phone service to an area where land lines are not available or for
emergency access to the cellular network from a PBX.
Interfaces, Activation, & Configuration
The CF100FX2-G will connect to either an FXS or FXO interface; FXS is the default factory setting. The
CF100FX2-G is activated by inserting a SIM from a cellular provider; no AT commands are required for this.
Configuration is done through Multi-Tech specific AT commands.
Application Example