Eldes EPIR3 - Page 106

106
106 EN
EPIR3 User Manual v1.3
a) The system switches to the backup connection that follows in the sequence (presumably - Backup 1).
b) The system then attempts to transmit data by the backup connection.
c) If the initial attempt is unsuccessful, the system will make additional attempts until the data is
successfully delivered.
d) If the system ends up with all unsuccessful attempts, it will switch to the next backup connection in
the sequence (presumably - Backup 2) and will continue to operate as described in the previous steps.
The connection is considered unsuccessful under the following conditions:
• GPRS network – The system has not received the ACK data message from the monitoring station
within 40 seconds.
• Voice calls:
• The system has not received the “handshake” signal from the monitoring station within 40
seconds.
• The system has not received the “kisso” signal from the monitoring station within 5 attempts each
lasting 1 second.
• CSD – The system has not received the ACK data message from the monitoring station within 35
seconds.
• SMS – The system has not received the SMS delivery report from the SMSC (Short Message Service
Center) within 45 seconds.
e) If one of the attempts is successful, the system will transmit all queued up data messages by this
connection.
f) The system then returns to the primary connection and attempts to transmit the next data messages
by primary connection.
g) If the system ends up with all unsuccessful attempts by all connections, it will wait until the Delay
after last communication attempt time (By default – 600 seconds) expires and will return to the
primary connection afterwards.
h) If a new data message, except Test Event (ping), is generated during Delay after last communication
attempt time, the system will immediately attempt to transmit it to the monitoring station, regardless
of Delay after last communication attempt being in progress.