Clear-Com HX System Frames - Manual (Page 91)

The nodes adjacent to the failed node will loop-back their connections to the failed node
healing the ring using the working remains of the ring.
If the extent of the failure is such that the active ring is unable to heal itself the system will
switch to the secondary ring. 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 a single node is lost on both rings due to multiple fiber-optic linking card set failures etc the
nodes adjacent to the failed node(s) will loop-back their connections to the failed node(s)
healing the rings and the most intact ring will be used. The configuration software will report
the failure.
Loss of two fiber connections
If two adjacent fiber connections 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 node healing the ring.
The configuration software will report the failure correctly as two failed cables. If two non-
adjacent fiber connections are lost on the ring the nodes adjacent to the failures will loop-
back their connections to the failed cables healing the ring into 2 separate smaller rings. The
configuration software will report the failure.
Note:
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 fiber connections are lost on one ring and the other ring has a similar
failure 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 node healing the ring.
The configuration software will report the failure correctly as two failed cables. If two non-
adjacent fiber connections 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 cables healing the
ring into 2 separate smaller rings. The configuration software will report the failure.
Note:
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.
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.
91 Eclipse HX-Omega User Guide