Software release

• Junos OS Release 9.3 and later (Type 1)

Description

• 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)

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 interfaces support 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 DS1channels
  • 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.
  • 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

LEDs

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)

• 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