Specifications

4
SMS format – example: “for the objective with code 0261, an alarm was detected on
zone 2, disarm by code 1.”)
The next image describes functions of this communicator:
Functions of GSM-21T communicator
The digital GSM communicator performs several functions:
- detects loss and restoring of the phone line which the burglary control panel is
connected to, and forwards these events;
- supervises the phone line; in case that one gets faulted, the communicator will
generate the line tone, taking the events occurred at the control panel and
retransmitting them through the GSM network:
- in digital format, to a GSM interface monitoring station
- optionally, clearly, as SMS messages, onto a different mobile phone (i.e. on
the mobile phone of the burglary control panel-protected objective’s owner);
- provides 6 individual inputs to which sensors can be connected (burglary, fire,
etc), allowing the independent usage of the GSM communicator when the burglary
control panel is missing;
- transmits a periodical test, with a programmable period;
- transmits a code in case of weak GSM signal;
- detects mobile phone shutting down and commands its turning on.
Functioning modes of the GSM-21T communicator
GSM-21T communicator can function in 3 ways:
- it transmits events occurred at the objective protected by the burglary control
panel only to a GSM monitoring station (Xwatch DPC-08);