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EIA-530 PIC (M320 Router)


Software release


  • Two EIA-530, X.21, or V.35 serial ports

  • Power requirement: 0.07 A @ 48 V (3.4 W)

  • Model number: PB-2EIA530

Hardware features

  • Configured as data terminal equipment (DTE) ports

  • Resynchronization signal

  • Receives clock rates up to 16 Mbps

  • Local, data communications equipment (DCE) local, and DTE remote loopbacks

Software features

  • Supports four queues per port

  • Random early detection (RED)

  • Transmitter Signal Element Timing is looped from the timing received on the Transmitted Signal Element DCE. EIA-530 ports support the ability to invert the Transmit Data Element. The EIA-530 ports support the following rates:

    • 2.048 Mbps

    • 2.341 Mbps

    • 2.731 Mbps

    • 3.277 Mbps

    • 4.09 Mbps

    • 5.461 Mbps

    • 8.192 Mbps

    • 16.384 Mbps

  • V.35 ports support up to 2.048 Mbps

  • X.21 ports support up to 10 Mbps

  • Encapsulations:

    • Circuit cross-connect (CCC)

    • Translational cross-connect (TCC)

    • Frame Relay

    • High-Level Data Link Control (HDLC)

    • Point-to-Point Protocol (PPP)

Cables and connectors

  • Two DB-25 male connectors (one per port, included with PIC)

  • V.35 requires an EIA-530 to V.35 cable and connects to a V.35 DTE 34-pin Winchester type male cable (one per port)

  • X.21 requires an EIA-530 to X.21 cable and connects to a X.21 DTE DB-15 male cable


Three bicolor per port:

  • Data set ready (DSR):

    • Green—DSR is detected or ignored

    • Red—DSR expected but not present

  • Data carrier detect (DCD):

    • Green—DCD is detected or ignored

    • Red—DCD expected but not present

  • Resynchronization:

    • Green—Keepalives are being received

    • Red—Data terminal ready (DTR) toggled from low to high (resynchronization pulses are being sent)

Instrumentation (counters)

  • Per-port packet and byte counters

  • Resynchronization counters:

    • Number of resynchronizations initiated

    • Time of last resynchronization