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    E1 PICs (M40e Router)

    Figure 1: E1 RJ-48 PIC

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    Figure 2: E1 coaxial PIC

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    Software release

    Description

    • Four E1 or coaxial ports
    • Power requirement: 0.08 A @ 48 V (3.74 W)
    • Two versions:
      • 4-port, 120-ohm, RJ-48
      • 4-port, 75-ohm, coaxial
    • Onboard DSU functionality for E1 connectivity

    Hardware features

    • High-performance throughput on each port at speeds up to 2.048 Mbps, full duplex
    • Maximum transmission units (MTUs) of up to 4500 bytes
    • Per-interface diagnostics and loopback control
    • Per-interface shaping on output
    • Per-interface alarm and event counting and detection
    • HDB3 line coding
    • 4-bit CRC for G.704 framed mode
    • Per-port loop timing
    • Balanced and unbalanced modes
    • Packet buffering, Layer 2 parsing
    • Full bit error rate test (BERT)

    Software features

    • Integrated support for G.703 unframed mode and 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.

    • Configurable clock source: Internal or loop
    • Encapsulations:
      • High-Level Data Link Control (HDLC)
      • Frame Relay
      • Circuit cross-connect (CCC)
      • Point-to-Point Protocol (PPP)

    Cables and connectors

    • Two versions:
      • Four RJ-48 connectors (one per port)
      • Four coaxial connectors
    • Custom 10-ft (3.05-m) posilock to BNC male cable, separate Rx and Tx

    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)
    • Bipolar violations
    • Excessive zeros
    • Far-end block errors (FEBE, E-bit errors)
    • Loss of frame (LOF), Loss of signal (LOS)
    • Local and remote loopback diagnostics
    • Yellow alarm bit (X-bit) disagreements

    Published: 2010-10-28