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Channelized T1 IQ EOL PIC (M7i Router)

 

Software release

  • Junos OS Release 7.4 and later

    (End-of-life, see notification PSN-2013-03-892)

Description

  • Ten T1 ports

  • Power requirement: 0.15 A @ 48 V (7.2 W)

  • Intelligent queuing (IQ) PICs support fine-grained queuing per logical interface.

  • Channelization: T1, FT1, NxDS0

  

Hardware features

  • Data service unit (DSU) and channel service unit (CSU) functionality

  • Ports configurable as clear channel T1 interfaces with 1.544-Mbps connectivity

  • Framing: Superframe (SF or D4) and Extended Superframe (ESF)

  • Supports B8ZS (bipolar 8-zero substitution) and AMI (alternate mark inversion) line coding

  • Local, remote, and payload loopback testing

  • ANSI T1.403 loopback support:

    • Responds to embedded loopback commands upon receipt of an FDL command from remote end with loopup and loopdown at both line and payload level

    • Insertion of loopback commands enables remote CSU/NIU/Smartjack to enter loopback and loopdown at both the line and payload level (ANSI and Telcordia)

  • Inband loopback support:

    • Responds to inband loopback commands at both the line and payload level (ANSI and Telcordia)

    • Insertion of inband loopback commands at both the line and payload level (ANSI and Telcordia)

  • Clocking support of external (line) and internal

  • Buildout support of the following ranges:

    • 0 through 132 (Line buildout is from 1 through 132 feet)

    • 133 through 265 (Line buildout is from 133 through 265 feet)

    • 266 through 398 (Line buildout is from 266 through 398 feet)

    • 399 through 531 (Line buildout is from 399 through 531 feet)

    • 532 through 655 (Line buildout is from 532 through 655 feet)

Software features

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

  • SNMP: T1 MIB and DS0 MIB

  • Dynamic, arbitrary channel configuration

  • Full bit error rate test (BERT) patterns at T1 and DS0 levels

  • 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

  • 120-ohm RJ-48C connector (female)

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 indication signal (AIS)

  • Remote defect indication (RDI)

  • Loss of frame (LOF)

  • Loss of signal (LOS)

  • Bipolar violation (BPV)

  • Excessive zero (EXZ)

  • Line code violation (LCV)

  • Error seconds (ES)

  • Severely errored seconds (SES)

  • Severely errored frames (SEF)

  • Bit error event (BEE)

Instrumentation (counters)

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

  • 24–hour history or error counter updated at 15–minute intervals