MDC Signaling

MOTOTRBO supports a limited set of built-in MDC signaling features for analog radio operation.

Supported MDC Features

Emergency Signaling
Sends a help signal to a predefined user or group. This feature allows a user to trigger an alarm or notify the dispatcher during an emergency. The emergency can also be acknowledged.

Call Alert – Notifies a radio user of an incoming call when they are away from their radio. It also informs unavailable users that someone is attempting to contact them.

PTT ID – Identifies a user’s outgoing transmissions on receiving radios.

 

Radio Configuration for MDC Signaling

To configure MDC signaling, read the subscriber radio codeplug using CPS (Customer Programming Software).

1. Create an MDC Signaling System

Create a new MDC system and configure the following parameters:

• Primary ID (Hex)
  Each radio in the MOTOTRBO network must have a unique Primary ID.

  Note:
  The MDC subscriber ID system differs from the digital Radio ID system.
  The Primary ID must contain up to 4 hexadecimal digits, with:

  • Minimum: 0001

  • Maximum: DEEE

  • The hexadecimal digit F is not allowed in any position.

• PTT ID Type
  Select Pre Only to allow automatic radio registration.

Optionally, configure an Emergency System to send emergency alarms or emergency calls.

2. Configure the Analog Channel

Add an analog channel and configure the following:

• Squelch Type: CSQ

• Signaling System: Select the created MDC System

Write the updated configuration to the radio.

3. Configure the Control Station

Configure the Control Station using the same MDC settings as the subscriber radios, except for the Primary ID (Hex), which must be unique per radio.

SmartPTT RadioServer Configuration

To configure RadioServer for MDC operation:

1. Use the MOTOTRBO Control Station configuration.

2. Specify:

   • Digital Radio ID of the Control Station radio

   • IP address of the Control Station radio

3. Save the configuration.

4. Restart the RadioService.

SmartPTT Dispatcher

After the configuration is complete:

• Subscriber radios will appear in the online subscribers list in the Dispatch Console.

• The first activity (PTT ID, Call Alert, or Emergency) from a subscriber will trigger the initial registration.