TC Communications TC2400 User Manual page 5

When an optic fault condition occurs, as shown in Figure 4, the self-healing function will detect the fault
and reroute the data, as shown in Figure 5.
Figure 5. Data Wrap Condition due to Fault #2 or #3
As Figure 6 below illustrates, should a cable breakage occur between Slave 1 and Slave 2, then Slave 1 and
2 will detect the fault and "wrap" the data to avoid the broken cable. Slave 1 will wrap the A-Ring's data
path to the B-Ring while Slave 2 wraps the B-Ring's data path to the A-Ring.
Figure 6. Self-Healing Function resulting from Optic Cable Breakage
Figure 4. Optic Fault Conditions
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TC2400 & TC2401
Ring User's Manual
Rev. 1.7