Release 2.4 is out


Today, Motorola Solutions announced the launch of MOTOTRBO system release 2.4. Included in this release are several interesting and useful features, more information about this can be found here.

Included in this release is a new version of CPS (Version 11.0); Radio Management (Version 1.7) and RDAC (Version 6.0). In Europe and Africa, the CPS and Radio Management can be downloaded from Motorola Online. If you don't have Motorola Online access, please contact your local Motorola Reseller to receive an update.

In order to support these features, radio will need to be upgraded to the latest firmware. The (now discontinued) DP/DM3000 series is not included in this update.


Backlight timer added in R2.4

In R2.4, the display Backlight timer in the SL40x0; DP460x and DP480x portable radios can now be customized to allow users to set when the light turns on and how long it remains active.

Event and Distance Driven Location Updates

In R2.4, when the state of a Telemetry VIO radio changes, the radio can now send a location update with a time stamp and pin status update to a 3rd party Location Tracking Application. This is known as an Event Driven Location Update.

There are a number of applications for this. For example the rear door of a cash transportation vehicle can be connected to the radio and whenever the door is opened, that event is sent to the control room.

The Distance Driven Location Update is triggered when the distance traveled by a radio from the last update exceeds specific values defined in the location server application (predetermined distance). Using this feature, the number of location updates over the air can be reduced when a radio is not moving or moving slowly.

Audio enhancements in R2.4


Included in R2.4 are some enhancements which allow the radio to be customized to suit differing audio conditions.

The Environment setting allows the radio to boost the received audio and/or the dynamic range. In The choices are Loud and Workgroup and the choice would depend on where the radio is used. Loud would be more suitable for users who are in a high noise area. Workgroup would be better suited for control room applications. This additional audio processing is performed in the DSP.

Preference allows some  If Level 1, Level 2, Level 3, Treble Boost, Mid Boost, or Bass Boost are selected, the DSP processes the audio with some predefined filters. Level 1, Level 2, Level 3 perform band pass filtering with different cutoff frequencies whereas Treble, Mid and Bass boost apply a 3dB/8va filtering to the received audio.

Trill Enhancement will make the radio look for a Alveolar trill in the transmitted audio. If such a sound is detected, the radio will alter the compression slightly to allow the trill sound to be transmitted without distortion. An Alveolat trill is present in a number of Romance; Slavic and some African languages.

The above can also be changed by the user via the menu (display model required) if the User Selectable Audio Profile menu option is ticked in the CPS.

The Noise Suppressor feature enables the transmitting radio to automatically suppress noise on the microphone when detected. This gives the radio user a better audio experience by reducing unwanted ambient sounds. It is recommended to always have this feature enabled as this is one of the main selling points of MOTOTRBO.

When ticked, Audio Feedback Suppression makes the radio look for audio feedback and eliminate it from the transmitted audio. This feature has been included in MOTOTRBO since R2.1


Intelligent Audio Response has been a MOTOTRBO feature since R2.0. When enabled, the radio will monitor the background noise level and adjust the receive level accordingly.