M120 Internet Router PIC Guide
Alarms, errors, and events
Instrumentation (counters)
■Alarm indication signal
■Bit error rate signal degrade
■Bit interleaved parity errors B1, B2, B3
■Errored seconds
■Loss of frame (LOF), loss of pointer
■Payload mismatch
■Remote defect indication
■Severely errored framing (SEF), severely errored framing seconds
■Layer 2
44■ Channelized STM1 IQ PIC