Help us improve your experience.

Let us know what you think.

Do you have time for a two-minute survey?


SONET/SDH OC12/STM4 Enhanced IQ (IQE) PIC with SFP (M320 Router)


Software release


  • One OC12/STM4 port

  • SONET or SDH is configurable on a per-port granularity

  • Power requirement: 0.58 A @ 48 V (27.8 W)

  • Model number: PB-1OC12-STM4-IQE-SFP

Hardware features

  • Port is numbered 0.

Software features

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

  • Enhanced fine-grained queuing per logical interface. See the Class of Service Feature Guide for Routing Devices and EX9200 Switches for more information about class of service features.

  • Packet buffering, Layer 2 parsing

  • Local line and remote payload loopback testing

  • Encapsulations:

    • Circuit cross-connect (CCC)

    • Translational cross-connect (TCC)

    • Extended Frame Relay for CCC and TCC

    • Flexible Frame Relay

    • Frame Relay

    • Frame Relay for CCC

    • Frame Relay for TCC

    • Frame Relay port CCC

    • High-Level Data Link Control (HDLC)

    • HDLC framing for CCC

    • HDLC framing for TCC

    • MPLS CCC

    • MPLS TCC

    • Multilink Frame Relay (MLFR) UNI NNI (MFR FRF.16)

    • Point-to-Point Protocol (PPP)

    • PPP for CCC

    • PPP for TCC

  • Encapsulations available only for DS1:

    • Multilink Frame Relay end-to-end (MLFR FRF.15)

    • Multilink PPP (MLPPP)

    • PPP over Frame Relay

Cables and connectors

  • Duplex LC/PC connector (Rx and Tx)

  • SONET/SDH OC12/STM4 fiber-optic SFP transceivers:

    • Short reach (model number: SFP-OC12-SR)

    • Intermediate reach (IR-1) (model number: SFP-OC12-IR)

    • Long reach (LR-1) (model number: SFP-OC12-LR)

    Optical interface specifications—see SONET/SDH OC12/STM4 Optical Interface Specifications


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

  • SONET alarms:

    • Alarm indication signal—line (AIS-L)

    • Alarm indication signal—path (AIS-P)

    • Bit error rate signal degrade (BERR-SD)

    • Bit error rate signal fail (BERR-SF)

    • Loss of frame (LOF)

    • Loss of light (LOL)

    • Loss of pointer (LOP)

    • Loss of signal (LOS)

    • Payload label mismatch (PLM-P)

    • Remote defect indication—line (RDI-L)

    • Remote defect indication—path (RDI-P)

    • Remote error indication (REI)

    • Payload unequipped (unequipped STS at path level) (UNEQ-P)

  • SDH alarms:

    • Administrative unit alarm indication signal (AU-AIS)

    • Bit error rate signal degrade (BERR-SD)

    • Bit error rate signal fail (BERR-SF)

    • Bit interleaved parity (BIP) error B1, B2, B3

    • Higher order path—alarm indication signal (HP-AIS)

    • Higher order path—far-end receive failure (HP-FERF)

    • Higher order path—payload label mismatch (HP-PLM)

    • Higher order path—loss of pointer (HP-LOP)

    • Higher order path—remote defect indication (HP-RDI)

    • Higher order path—unequipped (HP-UNEQ)

    • Loss of frame (LOF)

    • Loss of light (LOL)

    • Loss of signal (LOS)

    • Multiplex section—alarm indication signal (MS-AIS)

    • Multiplex section—far-end receive failure (MS-FERF)

    • Multiplex section—remote defect indication (MS-RDI)

    • Multiplex section—remote error indication (MS-REI)

    • Phase lock loop (PLL)

    • Remote error indication (REI)

    • Severely errored frame (SEF)

Instrumentation (counters)

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