
I N S T A L L A T I O N
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GsmAlarm-420 Software ver. 1.05
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4.3.
SYSTEM OPERATION SET UP
SIM card is needed for GsmAlarm-420 operation, you may acquire it from any GSM service
provider.
Before inserting SIM card into GsmAlarm-420 SIM card holder set PIN code request off. It can be
performed simply inserting SIM card into any standard mobile phone and following certain phone
user manual instructions.
After system circuit is connected according diagrams showed in chapter 4.1 or 4.2, place SIM card
into GsmAlarm-420 SIM card holder, turn system power on, then wait till indicator SIGNAL will
start to blink periodically and indicator MODE will be constantly alight. In case SIGNAL is
constantly alight, check if SIM card‘s PIN code request is off and GSM antenna is connected. GSM
signal quality can be evaluated according the blinking frequency of SIGNAL indicator. Connection is
very good if it blinks 4 or 5 times with 2 seconds breaks after. SIGNAL indicator blinking fewer
times, indicates weaker connection. Position of GSM antenna might be changed in order to improve
signal quality.
Perform system programming when armed mode is disabled (ON/OFF contacts are closed). Protected
zones must be closed (indicators Z1 – Z4 are off, MODE and LED constantly alight).