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Channelized OC3 IQ EOL PIC (M120 Router)


Software release

  • Junos OS Release 8.0R2 and later (Type 1)

    End-of-life (see notification PSN-2013-03-892)

Note: This PIC is not supported in Junos OS Release 8.1R1.


  • One OC3 port

  • Power requirement: 0.39 A @ 48 V (8.6 W)

  • Intelligent queuing (IQ) PICs support fine-grained queuing per logical interface.

  • Channelization: DS3, DS1, DS0

Hardware features

  • Subrate and scrambling:

    • Digital Link/Quick Eagle

    • Kentrox

    • Larscom

    • Adtran

    • Verilink

  • Packet buffering, Layer 2 parsing

  • M13/C-bit parity encoding

  • DS3 far-end alarm and control (FEAC) channel support

  • Local and remote loopback testing

Software features

  • Quality of Service (QoS) per channel: weighted round-Robin (WRR), random early drop (RED), weighted random early drop (WRED)

  • Simple Network Management Protocol (SNMP): OC3 MIB, DS3 MIB, T1 MIB

  • Dynamic, arbitrary channel configuration

  • Full Bit Error Rate Testing (BERT)

  • Encapsulations:

    • High-Level Data Link Control (HDLC)

    • Frame Relay

    • Circuit cross-connect (CCC)

    • Translational cross-connect (TCC)

    • Point-to-Point Protocol (PPP)

Cables and connectors


One tricolor per port:

  • Off—Not enabled

  • Green—Online with no alarms or failures

  • Yellow—Online with alarms for remote failures

  • Red—Active with a local alarm; router has detected a failure

Alarms, errors, and events

  • Alarm indication signal (AIS-L, AIS-P)

  • Bit error rate signal degrade (BERR-SD), bit error rate signal fail (BERR-SF)

  • Bit interleaved parity errors B1, B2, B3 (CV-S, CV-L, CV-P)

  • Errored seconds (ES-S, ES-L, ES-P), far-end bit errors REI-L, REI-P (CV-LFE, CV-PFE), far-end Block error (FEBE), far-end errored seconds (ES-LFE, ES-PFE), far-end severely errored seconds (SES-LFE, SES-PFE), far-end unavailable seconds (UAS-LFE, UAS-PFE)

  • Frame error

  • Idle code, idle received

  • Loss of frame (LOF), loss of pointer (LOP-P), loss of signal (LOS)

  • Out of frame (OOF)

  • Payload mismatch (PLM-P), payload unequipped (UNEQ-P)

  • Parity bit (P-bit) disagreements

  • Path parity error

  • Remote defect indication (RDI-L, RDI-P)

  • Severely errored framing (SEF), severely errored framing seconds (SEFS-S), Sseverely errored seconds (SES-S, SES-L, SES-P), unavailable seconds (UAS-L, UAS-P)

  • Yellow alarm bit (X-bit) disagreements