# Standards & specifications

Canonical: https://frmcs.org/knowledge/standards-and-specifications
Last reviewed: 2026-10-02
Status: editorial reference page (static legacy content, no stored approval record)

## Short answer

FRMCS documents come from several bodies: UIC (user requirements and programme documents), ETSI TC RT (railway system specifications), 3GPP (underlying mobile technology) and ERA (European regulatory framework). Always check document version and status — draft, published, or referenced by regulation.

## Reading status correctly

- **Planned** – announced work, no document yet.
- **Draft** – document exists but is not final.
- **Published** – formally released by the issuing body.
- **Referenced by regulation** – cited in a binding legal act (separate step).

## Sources by body

- UIC FRMCS programme [1]
- ETSI TC RT [2]
- 3GPP specifications [3]
- ERA TSI [4]

The Standards page records each document with version, status, date and the date we last checked the original source.

## Sources

1. [FU-7100 – FRMCS User Requirements Specification](https://img1.uic.org/IMG/pdf/fu-7100-5.0_0.pdf) — UIC, 5.0.0 (19 Feb 2020)
2. [ETSI TS 103 764 — System Architecture](https://www.etsi.org/deliver/etsi_ts/103700_103799/103764/01.01.01_60/ts_103764v010101p.pdf) — ETSI TC RT, v1.1.1
3. [3GPP TS 22.289 – Mobile communication system for railways (ETSI TS 122 289)](https://www.etsi.org/deliver/etsi_ts/122200_122299/122289/19.00.01_60/ts_122289v190001p.pdf) — 3GPP / ETSI, V19.0.1
4. [CCS TSI Appendix A – mandatory specifications (ETCS B4 R1, GSM-R B1 MR1, FRMCS B0)](https://www.era.europa.eu/era-folder/1-ccs-tsi-appendix-mandatory-specifications-etcs-b4-r1-rmr-gsm-r-b1-mr1-frmcs-b0-ato-b1) — ERA

## Cite as

Standards & specifications. FRMCS Atlas. https://frmcs.org/knowledge/standards-and-specifications (last material update 2026-10-02)

> FRMCS Atlas is a personal editorial project by Ante Samardzic (employed by Frequentis), not an official Frequentis, UIC, ETSI or ERA publication or endorsement. Claims are source-linked; review status is stated per page — database articles pass a stored quality review and human approval of the exact version, legacy static pages are marked as such.