The European railway industry is on the verge of a major transformation of its telecommunications infrastructure. GSM-R (Global System for Mobile Communications – Railway), which has served as the backbone technology for mission-critical railway communications across Europe for more than two decades, is gradually being succeeded by FRMCS (Future Railway Mobile Communication System) — a next-generation communication platform built on 5G technologies.
The transition to FRMCS is one of the key elements of the digital transformation of railway transport and an important component of the further development of the European Rail Traffic Management System (ERTMS).
Since its introduction, GSM-R has been the foundation of mission-critical railway communications, enabling voice communication between train drivers, dispatchers, and operational personnel while supporting train control and traffic management systems.
However, modern railway operations require far more advanced capabilities. Growing data volumes, increasing levels of automation, the introduction of digital services, and higher requirements for safety and operational efficiency are driving the need for a new telecommunications platform.
For this reason, railway infrastructure managers and operators across the European Union have begun the gradual transition to FRMCS — a technology designed to provide the digital foundation for the railway of the future.
Unlike GSM-R, the new system is designed to support both mission-critical voice services and a broad range of digital railway applications.
Key capabilities of FRMCS include:
Mission Critical Voice communications;
Real-time data transmission for signalling and traffic management systems;
Integration with ERTMS and future digital traffic management solutions;
Support for onboard and infrastructure video surveillance systems;
Integration of IoT solutions for infrastructure and asset monitoring;
Implementation of Predictive Maintenance to optimize maintenance activities and reduce failures;
Enabling technologies for automated and autonomous train operations;
Significantly higher capacity and flexibility compared to GSM-R.
By leveraging 5G technologies, FRMCS delivers a new level of performance, reliability, and scalability for railway communication networks.
Today, FRMCS is viewed not merely as a technological replacement for GSM-R but as one of the fundamental building blocks of ERTMS and the Single European Railway Area.
The harmonization of communication and traffic management standards improves interoperability between national railway networks, enhances operational safety, and facilitates international rail transport.
As a result, the development of modern railway communication systems has become an essential component of Europe's long-term transport infrastructure modernization strategy.
For Ukraine, the development of modern railway communication systems is particularly important in the context of European integration, the expansion of international transport corridors, and the reconstruction of critical infrastructure.
Further integration of Ukraine’s railway network into the European transport system will require the gradual harmonization of technical standards, particularly in the areas of operational communications and traffic management systems.
In the long term, the implementation of technologies compatible with ERTMS and FRMCS can contribute to:
enhanced railway safety;
improved efficiency of traffic and dispatching operations;
development of international transport corridors;
stronger interoperability with European railway operators;
further digitalization of railway infrastructure.
Among the recent large-scale projects of the Kontron Group is the deployment of GSM-R infrastructure for ETCS Level 2 implementation on the Varín – Košice – Čierna nad Tisou corridor in Slovakia, which forms part of the Trans-European Transport Network (TEN-T). In addition, in 2025 the company launched a GSM-R project for the Spanish infrastructure manager ADIF on the Medina del Campo – Orense railway line.
With more than 25 years of experience in GSM-R technologies, Kontron actively contributes to the development of FRMCS technologies and standards that will shape the future of mission-critical railway communications in Europe.
ISTEL 3000 is the official partner of Kontron in Ukraine and has extensive experience in delivering telecommunications projects for critical infrastructure operators, telecommunications providers, and the transport sector.
We closely monitor the evolution of modern railway communication technologies and are committed to sharing international expertise and best practices in implementing next-generation solutions that support the digital transformation of transport infrastructure and Ukraine’s integration into the European transport ecosystem.
Sincerely,
ISTEL 3000 Team