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Channelized DS3 IQ PIC (M7i Router)

Image g003036.gif

Software release

  • JUNOS 6.0 and later


  • Four DS3 ports
  • Power requirement: 0.32 A @ 48 V (15.6 W)
  • Intelligent queuing (IQ) PICs support fine-grained queuing per logical interface
  • Channelization: DS3, DS0

Hardware features

  • Data service unit (DSU) functionality
  • Subrate and scrambling:
    • Digital Link/Quick Eagle
    • Kentrox
    • Larscom
    • ADTRAN
    • Verilink
  • B3ZS line encoding
  • M13 or C-bit parity
  • Full bit error rate test (BERT)
  • Local and remote loopback testing

Software features

  • 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)

Cables and connectors

  • Standard DS3 BNC coaxial cable interfaces


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)
  • 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

Instrumentation (counters)

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

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