Juniper Networks M20 manual Alarms, errors, and events Instrumentation counters

Channelized DS3 IQ PIC

LEDs	One tricolor per port:
	■ Off—Not enabled
	■ Green—Online with no alarms or failures
	■	Amber—Online with alarms for remote failures
	■	Red—Active with a local alarm; router has detected a failure

Alarms, errors, and events

Instrumentation (counters)

■Alarm indication signal (AIS)

■Excessive zeros (EXZ)

■Far-end block error (FEBE)

■Frame error

■Idle code, Idle received

■Line code violation (LCV)

■Loss of signal (LOS)

■Out of frame (OOF)

■Parity bit (P-bit) disagreements

■Path parity error

■Yellow alarm bit (X-bit) disagreements

■Layer 2 per-queue and per-channel packet and byte counters

Channelized DS3 IQ PIC ■ 23