Alarms Transmission System
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SecureConnect Servers to Receiving Centre Transceiver (RCT)
– If an alarm
transmission is unsuccessful from the SecureConnect servers to the Receiving Centre
Transceiver (RCT), no response is received at the end of the retry sequence.
Acknowledgments of successful alarm transmissions received from the RCT are
forwarded to the SecureConnect servers and logged.
SecureConnect Servers to CSL Dual Com
– If an alarm transmission is unsuccessful
in transmitting from the SecureConnect servers to CSL Dual Com, the following event
is logged at the SecureConnect Servers at the end of the retry sequence
: “No
response from CSL". Acknowledgments of successful alarm transmissions received
from the RCT are forwarded to the SecureConnect servers and logged.
Transmission monitoring: single-path connection
The Primary ATP can be either the Ethernet connection or the 4G/2G mobile connection.
For a single-path Ethernet connection, no COM-SD-GSM module must be fitted. For a
single-path 4G/2G connection, the COM-SD-GSM module's "Data Mode" setting must be
set to "Mobile Only".
Monitoring the integrity of the transmission system is performed in two stages:
1.
The transmission network interface is monitored using the following methods:
Ethernet
– the local connection from the SPT to the LAN is verified by monitoring
the line voltage.
4G/2G mobile data
– the local connection from the SPT to the mobile data
network is verified by periodically checking the signal strength and registration to
a service provider.
Note:
the SPT does not check the credit on PAYG SIMs, or
the provider's contract validity.
If the transmission network interface connection fails, the following transactions are
logged:
Ethernet
– “Ethernet Line Fault" (the keypad also changes status from green to
red). When the connection is restored, another transaction is logged: "Ethernet
Line Restored".
4G/2G
– “GSM Line Fault" (the keypad also changes status from green to red).
When the connection is restored, another transaction is logged: "GSM Line
Restored".
2.
The Alarm Transmission System (ATS) is monitored by the SPT maintaining a
continuous connection to the SecureConnect servers. This connection is periodically
polled to ensure the connection between the SPT and the SecureConnect servers is
available.
The following is logged for a loss in connection between the SPT and the
SecureConnect servers:
"Offline (Ethernet)"
– for an Ethernet connection.
"Offline (Mobile)"
– for a 4G/2G connection.
The following is the logged for a restoral of the connection between the SPT and the
SecureConnect servers:
"Online (Ethernet)"
– for an Ethernet connection.
"Online (Mobile)"
– for a 4G/2G connection.
The SecureConnect servers notify the alarm receiving centre via its Receiving Centre
Transceiver (RCT) of both the loss and restore of a connection between the SPT and
the SecureConnect servers at the required intervals.