M120 Internet Router PIC Guide

Software features

Cables and connectors

LEDs

Alarms, errors, and events

Instrumentation (counters)

Quality of service (QoS) per channel: weighted round-robin (WRR), random early detection (RED), weighted random early detection (WRED)

Simple Network Management Protocol (SNMP): DS1 MIB, DS3 MIB

Dynamic, arbitrary channel configuration

Encapsulations:

High-Level Data Link Control (HDLC)

Frame Relay

Circuit cross-connect (CCC)

Translational cross-connect (TCC)

Point-to-Point Protocol (PPP)

Standard DS3 BNC coaxial cable interfaces

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

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

34Channelized DS3 IQ PIC

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Juniper Networks manual M120 Internet Router PIC Guide