Clear-Com Eclipse-Omega - Manual (Page 58)

Clear-Com
Eclipse Omega Instruction Manual
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Loss of Two Nodes
If two adjacent nodes are lost on the ring this will be handled as for the
loss of a single node where the nodes adjacent to the failed node will
loop-back their connections to the failed nodes healing the ring. The
configuration software will report the failure correctly as two failed
nodes . If two non-adjacent nodes are lost on the ring the nodes
adjacent to the failures will loop-back their connections to the failed
nodes healing the ring into 2 separate smaller rings. The configuration
software will report the failure. Note that in this instance the two
sub-rings will be dependent on their Ethernet connections for
configuration and data transmission but there will be no audio path
between them.
Switching to the secondary ring will cause audio breaks or
disturbances and temporary loss of crosspoint data. The self healing
mechanism is performed autonomously by the fiber linking card
whereas the switch-over between redundant cards and rings requires
software or operator intervention.
If two adjacent nodes are lost on one ring and the other ring has a
similar fault this will be handled as for the loss of a single node where
the nodes adjacent to the failed node will loop-back their connections
to the failed nodes healing the ring. The configuration software will
report the failure correctly as two failed nodes. If two non-adjacent
nodes are lost on one ring and the other ring has a similar fault the
nodes adjacent to the failures will loop-back their connections to the
failed nodes healing the ring into 2 separate smaller rings. The
configuration software will report the failure. Note that in this instance
the two sub-rings will be dependent on their Ethernet connections for
configuration and data transmission but there will be no audio path
between them.
Fiber-Optic Linking Card Failure
This will be handled as for loss of a single node above. The
configuration software will report the failure.
FAULT TOLERANCE
Dual Card Set Redundant System - Full Redun-
dancy
In the event of single or multiple cable fault or loss of node conditions
occurring on one ring whilst the other ring remains intact the active ring
always attempts to heal itself.
Switching to the secondary ring will cause audio breaks or
disturbances and temporary loss of crosspoint data. The self healing
mechanism is performed autonomously by the fiber linking card
whereas the switch-over between redundant cards and rings requires
software or operator intervention.