Specifications

3
GENERAL FEATURES
GSM-21T is a GSM communicator mounted in a metallic case. Inside the case
there is a 220V
ac
transformer, a back-up battery, and a compartment where the
mobile phone (from Ericsson family - see „Usable GSM phones”) is to be placed,
allowing the antenna to get out of the case.
GSM-21T communicator can be used as an accessory for a burglary control panel
with digital communicator or as a stand-alone alarm unit.
GSM-21T communicator can be connected to a burglary control panel, as backup
for the telephone line in case it is faulted, or directly, in case of missing telephone
line. Thus, the communicator provides a higher security level for objectives
protected by burglary alarm systems.
In case the control panel transmits events (in DTMF formats), the GSM module
receives and codifies them, while the GSM phone transmits them to the GSM
monitoring station, which must have a GSM interface. This GSM interface decodes
the signal transmitted by the communicator GSM phone. The GSM interface is
produced by Romano Electro Int’l Company, as an accessory for the Xwatch DPC-
08 monitoring station.
The owner of the burglary alarm system can optionally get SMS-formatted event
description on his/her own GSM phone.
GSM-21T communicator can be used in all GSM telephone networks, selected
through the acquired SIM card.
GSM-21T communicator is totally compatible with the burglary control panels in
Cerber, XL, Paradox families, etc.
Parameter programming is performed by means of the GSM phone.
Applications of the GSM-21T communicator
GSM-21T communicator was designed to be used in one or several situations
below:
- an alarm system with a digital communicator can function more securely if a GSM-
21T module is added. This module notices if the phone line is missing (by accident
or intentionally) from the alarm system, takes the control panel’s events and drives
them to a GSM monitoring station (phone line back-up). Thus, the alarm system is
never vulnerable and will transmit any event to the monitoring station in real time;
- an objective protected by an alarm system with digital communicator, for which a
phone line is not available (remote villas, depots) can report system events to a
monitoring and intervention for a lower cost compared to the radio monitoring;
- an application for event transmission regarding some inputs status when no alarm
system is needed (panic buttons, etc.);
-
an application for input remote control, using the own mobile phone
(turning on central heating, light, etc.) – under construction.
Note: for the first 3 cases, appropriate events can be transmitted not only to a
monitoring station but also onto the own mobile phone, through clear messages in