ADC AVIDIA SWD4573I1 User Manual page 560

Monitoring APS Status
Information
Last Switched Time
Number of Switches
Signal Degraded Count
Signal Failure Count
534
Description
The date and time of the last APS switch.
The number of switches that have occurred since the OC3 card was last reset.
The number of times the signal has degraded and the traffic has switched to
the protection channel as a result.
The number of times the signal has failed and the traffic has switched to the
protection channel as a result.
Avidia System Configuration and Management User Manual