APPEAR AS Confidential 308/352
12.3 OUTPUT REDUNDANCY
The output redundancy solution provided for the output cards is based on sending state events to an external
switch which can then perform the appropriate redundancy switch. For the IP output card this event is the OSPF
messages and for all other outputs the event is in the form of an SNMP alarm. This allows external equipment
and switches to be configured to switch to a redundant source when these messages are received.
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