Type: International Union of Railways / FRMCS Programme · ID: G01
The International Union of Railways (UIC), French Union Internationale des Chemins de fer, brings together the rail sector's requirements for the GSM-R successor within the FRMCS programme. UIC: FRMCS – organisation and document directory
Role in the FRMCS Context
For operators and manufacturers, the UIC is a key source of rail-specific FRMCS documents. The materials published by the European Union Agency for Railways (ERA) cover functions, system requirements, on-board requirements and interfaces. ERA: Opinion ERA/OPI/2024-10 and associated specifications
The work can be understood through a concrete question: is it about a needed function, an architecture decision, or the connection of an application? Different documents are intended for each. A complete picture emerges only by considering them together; the Functional Interface Specification explicitly points to this relationship. UIC: FRMCS FIS FIS-7970, version 2.1.0
Significance and Binding Nature
For application purposes, document version, requirement category and regulatory reference must be checked separately. ERA lists published V2 materials and the specifications of CCS TSI Annex A in different directories. A download alone therefore does not prove a general obligation to apply. ERA: Opinion ERA/OPI/2024-10 and associated specifications ERA: CCS TSI Appendix A – mandatory specifications
Working Groups and Cooperation
The technical contributions of the FWG, ATWG, TOBA, FIS, FFFIS and UGFA groups are coordinated through the UIC governance structure. UIC: 100th ATWG meeting, 12 June 2026
Practical Guidance
Recommendation for project teams: first record the use case and the target baseline. Then add the matching specifications, with exact version, to a shared reference list.