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DS3/E3 Enhanced IQ (IQE) PIC (M320 Router)

Image g002618.gif

Software release

  • JUNOS 9.3R2 and later


  • Four DS3 or E3 ports
  • DS3 or E3 is configurable on a per-port granularity
  • Power requirement: 0.51 A @ 48 V (24.7 W)

Hardware features

  • Ports are numbered 0 through 3 top to bottom

Software features

    • Maximum transmission units (MTUs) of up to 9000 bytes
    • Subrate and scrambling:

      Note: Only DS3 supports subrate.

      • Digital Link/Quick Eagle
      • Kentrox
      • Larscom
      • ADTRAN
      • Verilink (subrate: only port A mode)

        Note: For DS3 interfaces, Verilink does not function if an IQE interface is paired with an IQ interface.

    • Data service unit (DSU) functionality
    • B3ZS line encoding
    • Framing: M13, C-bit parity, framed clear channel
    • Full bit error rate test (BERT)
    • ANSI T1.403 FDL
    • Internal and loop clocking
    • DS3 far end alarm and control (FEAC) channel
    • Local line, remote line, and remote playback loopback testing
    • Simple Network Management Protocol (SNMP): DS3 MIB
    • 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 JUNOS Class of Service Configuration Guide for more information about class of service features.
    • 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

    Cables and connectors

    • 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

    Alarms, errors, and events

    • DS3 alarms:

      • Alarm indication signal (AIS)
      • Loss of frame (LOF)
      • Loss of signal (LOS)
      • Phase lock loop (PLL)
    • DS3 error detection:

      • C-bit code violations (CCV)
      • C-bit errored seconds (CES)
      • C-bit severely errored framing seconds (CEFS)
      • CRC errors
      • Excessive zeros (EXZ)
      • Far-end block error (FEBE)
      • Far-end receive failure (FERF)
      • Line errored seconds (LES)
      • Parity bit (P-bit) code violations (PCV)
      • Parity bit (P-bit) errored seconds (PES)
      • Parity bit (P-bit) severely errored framing seconds (PSES)
      • Severely errored framing seconds (SEFS)
      • Unavailable seconds (UAS)

    Instrumentation (counters)

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

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