Fault Tolerance
In all fault cases involving recoverable cable faults or loss of nodes on one or both rings the remaining nodes may experience audio breaks or disturbances and temporary loss of crosspoint information or data.
Audio and data from a failed node will not be available to the remaining nodes for the duration of the failure. When a ring with non-adjacent failures sub-divides into two sub-rings, audio and data from the failed nodes will not be available to the nodes in either sub-ring.
Audio and data will continue to be available to nodes within the same sub-ring, but data may still be available to all nodes that are still functioning if there is an intact, independent Ethernet connection to those nodes.
If a Matrix, connected as a node of the fiber-optic link is reset, powered down or failed this will constitute a lost or failed node on both rings and this node will experience audio breaks or disturbances and loss of crosspoint information or data for up to 5 seconds after the fault condition is cleared or repaired.
Single Card Set Redundant System: fiber redundancy
In all fault cases involving cable faults or loss of nodes on the ring the remaining nodes may experience audio breaks or disturbances and loss of crosspoint information or data.
When a ring with non-adjacent failures sub-divides into two sub-rings, audio and data from the failed nodes will not be available to the nodes in either sub-ring, audio will continue to be available to nodes within the same sub-ring, but data may still be available to all nodes that are still functioning if there is an intact, independent Ethernet connection to those nodes.
If a matrix, connected as a node of the fiber-optic link is reset, powered down or failed this will constitute a lost or failed node on the ring and this node will experience audio breaks or disturbances and loss of crosspoint information or data for up to 5 seconds after the fault condition is cleared or repaired.
An example of how a system with multiple matrices would be wired together is shown in the following diagram.