Simplex Fiber Cabling

Single Card Set Redundancy

In this scenario, each matrix contains one fiber-optic Linking card set (see the diagram below).

This approach still affords fiber connection redundancy since each rear card houses two fiber-optic transceivers.

Note:

In the absence of an Uninterrupted Power Supply (UPS), this configuration will not protect against loss of the node or the matrix itself.

Loss of single fiber connection

When there is no break in the fiber connections the fiber audio will be routed using the primary ring.

If there is any connection failure on the primary ring and the secondary ring is intact then the fiber audio routing will move to the secondary ring.

The self-healing mechanism is performed automatically by the Fiber Linking Card.

Switching to the secondary ring will cause audio breaks or disturbances and temporary loss of crosspoint data.

If a single fiber connection is lost on both rings the nodes adjacent to the failures will loop-back their connections to the failed cables healing the rings. In the state the fiber audio will therefore be routed utilizing both the primary and secondary fiber rings.

Note:

The Eclipse HX configuration software (EHX) will report any failures in the fiber connection system.

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 (EHX) 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:

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.