Go up 1. CCS TSI Appendix A – Mandatory specifications (ETCS B4 R1, RMR: GSM-R B1 MR1 + FRMCS B0, ATO B1 R1) 2. CCS TSI Application Guide – Informative specifications 3. CCS TSI Annex A – Archived specifications 4. CCS TSI Application Guide – Archived informative specifications ETCS System Compatibility (ESC) documents Radio System Compatibility (RSC) voice and data documents