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DS3 EOL PIC (M7i Router)


Software release

  • Junos OS Release 6.0 and later

    (End-of-life, see notification PSN-2010-02-648)


  • Two or four DS3 ports

  • Power requirement: 0.47 A @ 48 V (22.5 W)

  • Integrated DSU interoperability with leading DSU vendors

Hardware features

  • High-performance throughput on each port at speeds up to 44.736 Mbps, full duplex

  • C-bit framing

  • B3ZS line encoding

  • Subrate and scrambling:

    • Digital Link

    • Kentrox

    • Larscom

  • Per-port rate policing on input

  • Per-port rate shaping on output

  • Packet buffering, Layer 2 parsing

Software features

  • DS3 functionality:

    • C-bit framing

    • B3ZS line encoding

  • DS3 diagnostics and loopback control

  • DS3 alarm and event counting and detection

  • Per-packet counts and byte counts

  • Local and remote loopback testing, as well as BERT testing per DS3

  • DS3 far-end alarm and control (FEAC) channel support

  • Encapsulations:

    • High-Level Data Link Control (HDLC)

    • Frame Relay

    • Circuit cross-connect (CCC)

    • Point-to-Point Protocol (PPP)

Cables and connectors

  • Custom 10 ft (3.05 m) posilock SMB to BNC male cable, separate Rx and Tx (provided)


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)

  • Bit error rate test (BERT) functionality on PIC (you can configure one DS3 channel in BERT mode and configure the remaining channels to transmit and receive normal traffic)

  • Equipment failure (does not affect service)

  • Far-end block error (FEBE)

  • Frame error

  • Idle code, Idle received

  • Local and remote loopback

  • Loss of signal (LOS)

  • Out of frame (OOF)

  • Parity bit (P-bit) disagreements

  • Path parity error

  • Yellow alarm bit (X-bit) disagreements