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


Software release


  • Four E3 or Channelized DS3 ports

  • E3 or Channelized DS3 is configurable on a per-port granularity

  • DS3 channelization:

    • 4 DS3 channels

    • 112 DS1 channels

    • 1011 DS0 channels

  • Power requirement: 0.53 A @ 48 V (25.4 W)

  • Model number: PB-4CHDS3-E3-IQE-BNC

Hardware features

  • Ports are numbered 0 through 3 top to bottom

Software features

  • Maximum transmission units (MTUs) of up to 9000 bytes

  • Dynamic, arbitrary channel configuration

  • Subrate and scrambling:

    Note: Only DS3 supports subrate and scrambling.

    • 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) for DS0, DS1, and DS3

    • ANSI T1.403 FDL

    • Internal and loop clocking for DS3 and DS1

    • DS3 far end alarm and control (FEAC) channel

    • Local line, remote line, and remote playback loopback testing for each DS3 and DS1 channel

    • 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.

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

    • 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

  • Yellow—Online with alarms for remote failures

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

Alarms, errors, and events

  • Alarm reporting for error statistics and failure counts

  • DS1 alarms:

    • Alarm indication signal (AIS)

    • Loss of frame (LOF)

    • Remote alarm indication signal (RAIS)

  • DS1 error detection:

    • Bursty errored seconds (BES)

    • CRC errors

    • Errored seconds (ES)

    • Line errored seconds (LES)

    • Loss of framing seconds (LOFS)

    • Loss of signal seconds (LOS)

    • Severely errored seconds (SES)

    • Severely errored framing seconds (SEFS)

    • Unavailable seconds (UAS)

  • DS3 alarms:

    • Alarm indication signal (AIS)

    • Loss of frame (LOF)

    • Loss of signal (LOS)

    • Phase lock loop (PLL)

    • Yellow alarm

  • DS3 error detection:

    • When running bit error rate test (BERT) on 4-port CHDS3/E3 IQE PICs, where DS3/E3 is not SONET/SDH mapped, the LOF is reported and errors can be seen on the remote side. Both local and remote ends are C-bit framed and do not show errors when the bit error rate test is not running. When the bit error rate test is begun, framing mode on the local interface is set to unframed while the remote interface is still set to C-bit. This behavior is expected the 4-port CHDS3/E3 IQE PICs since Amur Framing does not support framed bit error rate testing.

    • 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)

      Upon initiation of the FEAC loop from the local port to the remote port, far-end block errors (FEBEs) are detected in the remote port statistics, this is expected behavior and these errors should be suppressed.

    • 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