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Fitting an Earpiece or Headset

At Comsco, we provide a variety of accessories to compliment your radio hire. From covert acoustic tubes, D-Shape over the ear to noise cancelling headsets we can provide what you need to hire no matter what the need.

The earpieces and headsets all connect via the 2-pin accessory socket located on the side of the hire radios. Motorola CP040 and Motorola DP1400 both feature the same socket located underneath a dust cap. Other radios such as Motorola GP340 or Motorola DP4400 require an accessory port audio adapter to use the standard 2-pin connection or they can use the bespoke direct connection which connects directly to the accessory port.

Here we will explain how to correctly fit the 2-pin connection.

Unlike a 3.5mm audio jack you may plug into your mobile phone, the radio may not work via the earpiece directly after installing without following the below instructions. This is because the remote PTT (push-to-talk) located on the wire of the earpiece / headset or sometimes on the cup of a headset uses the microphone line to send the push-to-talk command.

To correctly fit your 2-pin earpiece simply follow the instructions below:

  1. Ensure radio is switched OFF. If the radio is switched on the audio will be routed to the speaker of the earpiece but it is unlikely to transfer control of the PTT to the remote PTT.
  2. Fully insert the 2-pin earpiece plug into the radio until it firmly ‘clicks’ into the accessory port. This ensures correct alignment of the plug to the socket. If not pushed firmly the plug can sit slightly off target but feel and look like its connected correctly.
  3. Switch on the radio. The radio will now detect that an earpiece is connected and reroute the microphone and PTT control to the earpiece.
  4. Adjust the volume control to a suitable level.

Radio D-Shape Radio Earpiece for Two-way Radio | Over Ear Headset