Operating Logic For Alarm Reporting - SECURECOM SC-GPRS Manual

5.

Operating logic for alarm reporting

1. Reporting from alarm panel starts with a „hook off" of the line state. This means that the alarm panel
has „picked up" the phone line and is checking for it's presence. If communicator finds everything all
right and is able to accept the signal, it will provide a regular „line free" free signal. If something is wrong
and communicator is not able to forward the information, it will give a „line busy „ signal.
Typically, „busy" signal" means that a SIM card is missing or bad, PIN code is wrong, or none of receivers
can be reached.
2. Alarm panel dials the phone number and waits for the "handshake" signal from receiver. If the dialed
phone number fits to a value in field „Dialed number by alarm system" (for MS1 OR MS2, if both are
available), or if that field is BLANK, the communicator will provide the „handshake" signal and the alarm
panel will transmit the CID message.
3. When the CID code is received, the communicator will send the report to the appropriate MS,
selected with the phone number dialed by alarm system. If the „Dialed number by alarm system" field is
blank, then the report will be sent to MS1, as long as it is available- only when MS1 is not available (
receiver can not be reached), the message is sent to MS2.
4. The „account number", i.e object identifier in the message that is sent to receiver will differ from the
one received from alarm panel, if the „replace panel identifier" field is selected „yes". In that case, the
Identifier will be changed to the value set in „object identifier".
5. When the report is sent to receiver, it forwards it to monitoring software and it returns the
„acknowledge", a receipt for the message. The reciver sends the „acknowledge" to the communicator,
and it transmits the „acknowledge" tone to the alarm panel. Since the response time of the alarm panel
for acknowledge is short, the alarm panel will repeat the CID message before the acknowledge is
received from monitoring station. The device waits the end of repeated message and transmits the
acknowledge.
6. After receiving the acknowledge, the alarm panel starts transmitting the next CID code if there are
more reports to be sent, and the procedure is repeated from point
SC-GPRS 10 EN
Alarm Monitoring Communicator v1.3