Type: UIC working group · ID: G04
Telecom On-Board Architecture (TOBA) stands, within the UIC FRMCS programme, for the on-board architecture and the associated functional requirements. UIC: FRMCS – organisation and document directory
Role in the FRMCS Context
For vehicle keepers, manufacturers and integrators, the on-board side is therefore the right starting point. ERA lists the On-Board FRMCS Functional Requirements Specification as a standalone document. The UIC also lists documents on migration variants for existing ETCS and cab-radio units. ERA: Opinion ERA/OPI/2024-10 and associated specifications UIC: FRMCS – organisation and document directory
For practical work, target equipment and the conversion path should be described separately. A vehicle concept must fit both the planned communication and the existing fleet. This profile therefore recommends recording existing applications, interfaces and conversion steps together before a specific equipment configuration is selected.
Significance and Binding Nature
A migration study and a requirements specification serve different purposes. For project requirements, the version used must be reconciled with the applicable regulatory framework and the agreed project scope. CCS TSI Annex A references TOBA-7510 with a specific version. ERA: CCS TSI Appendix A – mandatory specifications
Working Groups and Cooperation
Closely related areas are the ATWG for the overall system and the FFFIS work on application interfaces. The connection of on-board applications is described in FFFIS-7950 via OBAPP. UIC: FRMCS SRS AT-7800, version 2.1.0 (at ERA) UIC: FRMCS FFFIS FFFIS-7950, version 2.1.0 (at ERA)
Practical Guidance
Recommendation for vehicle projects: for each application, document the current connection, the planned FRMCS connection and the transitional state.