Spelso L, Operating Manual, Page: 3 / 11

1. Function
A GSM-FXS Gateway SPELSO L is designed to connect an analog
phone or office PBX to a GSM cellular network. The device is used in locations
where connecting standard telephone lines is difficult or inappropriate. The
gateway can be used for recording calls with the SPELSO adapter.
Main functions of GSM Gateway:
– TFXS port;
– voice menu for setup;
– Caller ID DTMF/FSK;
– signal polarity reversal support;
– simultaneous impulse and tone dialing support;
– SIM card balance queries;
– speed dial;
– last incoming call dialing;
– last number redial;
– preprogrammed number autodial function;
– additional symbols transfer with tone signals.
2
.
Overview
GSM-FXS Gateway SPELSO L is a device in a plastic case with the
following connectors:
– RJ-11 connector for telephone or PBX connection;
– power connector;
– SIM card slot;
– external aerial connector;
Refer to Figure 2.1 for an overview of the gateway design.
2