Kontron Transportation MCX solution

The future of GSM-R train radio functionalities for Secondary Lines

Kontron Transportation has developed the MCX OTT (Over The Top) solution for Secondary Lines that cannot build their own infrastructure due to high investments in infrastructure. Here, the networks of the public providers are used as transport medium for the own MCX application with GSM-R features such as single call, group call and train emergency call. Based on the future FRMCS standardization (3GPP, ETSI), the Kontron Transportation MCX solution extends obsolete analog radio communication means with modern "state of the art" train radio functionalities, without the need to develop an own infrastructure.

Kontron offers the solution as a "hosted solution" in a data center or as a server solution in the railroad's own IT departments. IP-68 industrial-grade smartphones with an MCX client, IP-enabled dispatchers with several modern user interfaces, and cab radios that follow the FRMCS standard serve as end devices.

Since public networks do not always offer full network coverage, the MCX OTT solution has been further developed in terms of transmission security, in cooperation with the Sauschwänzlebahn and the Ministry of Transport Baden Württemberg, and enhanced with the following features:

Heart-Beat Function

In addition to the use of two SIM cards from different providers in the end devices, a unique so-called heart-beat function was developed, which allows the client software to be in constant contact with the application.

This has the advantage that, for example, the user in the railcar or on the locomotive can see at a glance whether he is connected to the MCX application on the server or whether he is in a "dead zone". Optionally or on request, it is thus possible to switch automatically between the network providers. If no data connection is available in both networks, an emergency call via GSM is possible in case of emergency.

This functionality goes beyond the current FRMCS standard and offers further security in train-to-land communication.

Messenger service

Another feature is the own messenger service, which extends the MCX solution with preset or freely selectable messages.

With this service, important messages can be transmitted between the dispatcher and the user on the train or in the locomotive/traction unit even with minimal available bandwidth.

As standardization continues, video application, file transfer and functional train number entry will also be possible.


The IP-enabled dispatcher is another important component in the Kontron MCX solution. In addition to the existing functionalities such as individual call, group call or train emergency call, the dispatcher also provides further intelligent innovations. For example, a geographical map is provided, which makes it possible to detect the individual trains based on their GPS coordinates and display them on the map.

This helps the dispatcher to detect possible radio gaps on the track at an early stage and to initiate appropriate measures. Additional call lists, mails and predefined messages help to send recurring news quickly and effectively. The dispatcher's key display is freely programmable and assignable, ensuring an individual configuration adapted to operational requirements.  

Voice Recorder

As required for a train-to-land communications solution, Kontron Transportation also provides voice recording in the MCX solution.
Kontron works here with the same manufacturer as in many GSM-R projects with major railroad companies. This enables the greatest possible security to comply with all GSM-R specifications and features.   

6 Value Propositions of the MCx Solution