No communication after installing replacement MDC controller

Potential Symptoms

  • No communication after replacing MDC controller.
  • Loopback passed at TB42 IN on both sides (bottom twisting wires together; top using jumpers/conductor).

Environment

  •  AF-3010
  • Serial Radios        

Cause

  •  W1 & W2 jumped for modem communication.

Resolution

  •  Disconnect or unjump W1 & W2 (should only be jumped when modem communication is being used).
    • Jumpers should be in open position for serial radio or normal rs232/rs422 communication.
    • Jumpers should be in closed position when using a modem.



KB ID: DD2219938


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