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E1/T1 Circuit Emulation PIC (M7i Router)

 

Software release

  • Junos OS Release 9.3 and later

Description

  • Configurable as either twelve E1 ports or twelve T1 ports

    Note: Mixing E1 and T1 ports on the same PIC is not supported.

  • Power requirement: 0.52 A @ 48 V (25 W)

  • Onboard DSU functionality for E1 connectivity

Hardware features

  • Maximum transmission units (MTUs) of up to 1024 bytes

  • Per-interface diagnostics and loopback control

  • Per-interface alarm and event counting and detection

  • Framing

    • 4-bit CRC for G.704 framed mode

    • G.704 without CRC4

    • Unframed

  • Balanced and unbalanced modes

  • Full bit error rate test (BERT)

Software features

  • PIC can be configured as twelve T1 ports or twelve E1 ports

  • Local and remote loopback diagnostics

  • E1 ports

    • High-performance throughput on each port at speeds up to 2048 Mbps, full duplex

    • HDB3 line encoding

    • Integrated support for G.704 framed mode with CRC; this feature is user-configurable

      Note: The G.704 implementation supports speeds slower than 2.048 Mbps; multiple channels within a single E1 interface are not supported.

    • G.704 framed without CRC4

    • Unframed

    • Framed clear channel mode

    • Unframed clear channel mode

    • Framed fractional mode

  • T1 ports

    • High-performance throughput on each port at speeds up to 1544 Mbps, full duplex

    • AMI and B8ZS line encoding

    • Framed clear channel mode

    • Fractional mode

    • Superframe (D4/SF) and extended superframe (ESF) framing

    • ESF CSU counters, WRT impairments, and CRC checking

    • Local DS1 line loopback, remote line loopback

  • Loop timing and PIC line timing

  • Encapsulations: Structure-agnostic time-division multiplexing (TDM) over packet (SAToP) (RFC 4553)

  • Pseudowire emulation edge-to-edge (PWE3) for ATM (RFC 4717) (Junos OS Release 9.6 and later)

  • ATM Pseudowire emulation edge-to-edge via dynamic labels (LDP, RSVP-TE) (Junos OS Release 9.6 and later)

  • Inverse mulitplexing (IMA) for ATM (Junos OS Release 10.0 and later)

  • Simple Network Management Protocol (SNMP): ATM MIB (Junos OS Release 10.2 and later)

  • ATM QoS (Junos OS Release 10.2 and later)

    • Per-virtual circuit (VC) and per-virtual path (VP) traffic shaping

    • Unspecified bit rate (UBR) traffic shaping

    • Fine-grained real-time variable bit rate (rtVBR) and real-time variable bit rate (nrtVBR) traffic shaping

    • Port-level egress shaping

    • Constant bit rate (CBR)

    • Policing on a per virtual circuit basis

    • Independent peak cell rate (PCR) and sustained cell rate (SCR) policing

    • Counting, tagging, or discard policing actions

Cables and connectors

  • RJ-21 connector

  • Cables are rated for intra-building connections only.

LEDs

OK LED, one tricolor:

  • Off—PIC is offline and it is safe to remove it from the router.

  • Green—PIC is operating normally.

  • Yellow—PIC is initializing.

  • Red—PIC has an error or failure.

APP LED, one bicolor:

  • Off—Monitoring application is not running.

  • Green—Monitoring application is running under acceptable load.

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

Structure agnostic alarms for T1:

  • Alarm indication signal (AIS)

  • Loss of signal (LOS)

  • Errored seconds (ES)

  • Line code violation (LCV)

  • Line errored seconds (LES)

  • Severely errored seconds (SES)

  • Unavailable seconds (UAS)

Structure agnostic alarms for E1:

  • Alarm indication signal (AIS)

  • Errored seconds (ES)

  • Line code violation (LCV)

  • Line errored seconds (LES)

  • Severely errored seconds (SES)

  • Unavailable seconds (UAS)

Structure aware alarms for E1:

  • Alarm indication signal (AIS)

  • Loss of frame (LOF)

  • Loss of signal (LOS)

  • Yellow alarm (remote alarm indication (RAI) (YLW)

  • Far-end block error (FEBE)

  • Cylical Redundancy Check (CRC)

  • CRC major

  • CRC minor

  • Line code violation (LCV)

  • Path code violation (LCV)

  • Errored seconds (ES)

  • Bursty errored seconds (BES)

  • Line errored seconds (LES)

  • Severely errored seconds (SES)

  • Severely errored frame seconds (SEFS)

  • Unavailable seconds (UAS)