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Mototrbo and AlphaCom interfacing

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Revision as of 19:54, 29 September 2012 by Asle (talk)

This article describes how the AlphaCom can be integrated to the digital radio system Mototrbo from Motorola.

Functionality:

  • Without the XCMP converter only basic groupcall is supported (no

calling ID)

  • With the XCMP converter and EventHandler configuration the following

functionality has been tested:

  • Groupcall in fixed group (M-key is PTT)
  • Semi-duplex private call to selectable MOTOTRBO radio
  • Incoming group and private call to predefined intercom station
  • Predefined text messages to MOTOTRBO radio
  • Call Alert to MOTOTRBO radio
  • Display of Calling ID
  • The following functionality has not been tested yet:
  • Incoming Emergency Call
  • Talkgroup change
  • Remote monitor (listen in at radio)

The following functionality is currently not supported:

  • Receiving of text messages from AlphaCom (radio firmware issue). Which means that the radio handsets cannot receive for instance Call Request


Most suitable radio is DM3600 (display model); for basic functionality also DM3400 can be used. Connections:

  • The Mototrbo radio is connected to IP-ARIO with:
  • RX audio to Radio IN (Motorola 770 mV nom.)
  • TX audio to Radio OUT (Motorola 80 mV nom.)
  • PTT to RCO output (active low)
  • When more than groupcall functionality is required than a specific USB to Serial adapter is necessary (XCMP converter); the adapter is connected to serial port on the IP-ARIO and to the accessory port on MOTOTRBO radio (USB).
  • Audio is asymmetric, DC-block capacitor is required in TX audio line to radio.
  • Ignition input of the radio needs to be connected to +12V to power-up the radio automatically.