SilentKnight VisorAlarm Plus 2U - Manual (Page 6)

VISORALARM - Introduction
I - 4
Doc.DM374-I
Ver. 1.0
Figure 3. Teldat VisorALARM PLUS 2U and mIP/IPDACT operating scenario
There is a third scenario, thanks to the network backup functionality. In the previous scenario, if
communications between the IP Module and the VisorALARM PLUS 2U fails, the former tries to
send the alarms over the telephone network, as in a traditional scenario. Network backup permits you
to add a second VisorALARM PLUS 2U configured as backup and which would be a second option of
sending alarms in cases where the main VisorALARM PLUS 2U fails. If the probe over the main
fails, the mIP/IPDACT (from release 2.2 onwards) tries to establish communications with the backup
VisorALARM PLUS 2U. If this is achieved, the mIP/IPDACT will maintain the probe with latter and
sends the alarms which are produced. In the meantime, the mIP/IPDACT continues to poll the main
VisorALARM PLUS 2U until this becomes accessible once more. At this point the mIP/IPDACT
returns from backup and reestablishes all the communications with the main VisorALARM PLUS 2U.
In cases where the backup VisorALARM PLUS 2U also fails, the mIP/IPDACT will release the
telephone line so that the control panel, from this point, will take over and directly sends the alarms.