What is FRMCS
FRMCS (Future Railway Mobile Communication System) is the next-generation wireless communication standard for railways, designed to replace GSM-R. Based on modern 4G/5G technology, it enables more reliable, secure, and high-capacity communication between trains, trackside systems, and control centers.
What we offer
Railway communications are entering a new era. As GSM-R evolves toward FRMCS, operators need a trusted partner capable of ensuring continuity, interoperability, and long-term performance across both trackside and onboard environments.
We act as both a solution provider and system integrator, covering all key FRMCS service and application domains and components throughout the transition from GSM-R to FRMCS.
Our solutions
Our FRMCS Service and Application Strata are designed to integrate smoothly into multi-vendor telecom environments, ensuring interoperability and compliance with evolving standards. Designed to integrate seamlessly with telecom vendor solutions, our architecture enables a smooth migration path while maintaining operational continuity.
- Key components include:
- MCx solutions (Server & Client)
- MCx Dispatcher systems
- Trackside Gateway
- Voice and data recording solutions
- IMS / SIP Core
- GSM-R Interworking Function (IWF)
- Interoperability with legacy systems
- IWF (SIP-R) for GSM-R
- IWF (SIP) eg. for SIP PABX
With 25 years of experience delivering onboard railway solutions, we provide a robust and future-proof FRMCS TOBA offering. Our onboard solutions are engineered for reliability, performance, and long service life in demanding railway environments.
- Key components include:
- FRMCS Gateway
- MCx Client Integration
- QOS Management
- Multi Radio Management
- Dispatcher systems
- O&M Management Integrated
- Cybersecurity safety for data transmission and file transfers
- Compliance with European railway standards
Eviden supports customers across the full lifecycle of critical communication systems with dedicated railway expertise.
- Key components include:
- Design, Build, Commissioning and Integration
- Multi-technology integration
- Testing and measurement
- Multi-vendor care services
- Maintenance
Cybersecurity is embedded at every level of our solutions, ensuring resilience and regulatory compliance for mission-critical railway communications.
- Key components include:
- Advanced Analysis
- Secure Transfer
- Identity Management
- Network Protection
- Access and Authentification
The role of Interworking Function (IWF)
An Interworking Function (IWF) is a technical function that enables different communication systems or networks to work together seamlessly.
In the railway context, it allows services, applications, and users to communicate across technologies such as GSM-R and FRMCS, despite differences in protocols, interfaces, or architectures. The IWF ensures continuity of railway operations during migration phases by translating signaling, voice, and data services between systems.
This makes it a key enabler for interoperability and smooth transitions between legacy and future railway communication networks.
A phased approach, enabled by MCx and Interworking Functions, allows railway operators to introduce next-generation communications early, maintain operational continuity, and move toward full FRMCS compliance at a controlled pace.
Key benefits
Railway telecommunication standards and specifications
Our clients
What our clients say
CFL
Mathieu Perrus, Infrastructure Engineering Department
This project will enable us to reach a new milestone by becoming one of the first European railway companies to deploy a next-generation critical communication system (MCx). Our aim is to implement these solutions across all our national railroads, in line with evolving industry standards."
CFL
Mathieu Perrus, Infrastructure Engineering Department
Related resources
5th FRMCS Plugtests at the UIC Headquarters
Eviden took part in the 5th FRMCS Plugtests at the UIC Headquarters in Paris to validate the interoperability and maturity of FRMCS standards and solutions, including MCX components.
Tisséo
Eviden deploys and secures the train-to-ground radio communication systems for Tisséo's future Toulouse metro line C.
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UNIFE partnership
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Chemins de Fer Luxembourgeois (CFL)
Chemin de Fer Luxembourgeois (CFL) chooses Eviden to deploy end-to end next generation railway mission-critical communication systems.
Future-forward : A day in the life of a city railway work
The day ended incident-free thanks to predictive technology, near real-time data, and digital twins working in harmony.
Railway innovation with Talgo
Eviden collaborates with Talgo to develop TSMART©, a digital platform providing real-time monitoring of train assets and the implementation of condition-based predictive maintenance using artificial intelligence.
Our Team
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