Clear-Com Eclipse Median, Instruction Manual, Page: 49 / 114

Vitec Group Communications
Eclipse Median Instruction Manual 3 - 9
Loss of a Single Node
If a node is lost on the ring 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. The configuration software (ECS) will
report the failure.
This applies to the situation where the fiber card itself has failed rather
than the matrix.
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 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.
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
DUAL CARD SET REDUNDANCY
This is shown as in Figure 3-5 with both " Card set A" and "Card set
B" fitted in each node of the ring. In this case each Matrix Frame
contains two Fiber-optic Linking card sets. This approach affords full
redundancy, offering protection against component failure within a
single Fiber-optic Linking Card Set. Again in the absence of an
Uninterruptible Power Supply this configuration will not protect against
loss of the node or Matrix Frame itself.