PD CLC/TR 50542:2010

1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviations
5 Devices/modules of the systems
6 DMI functions for ERTMS/ETCS
7 DMI Safety targets
8 Communication system requirements
Annex A (informative) - Actions
Annex B (informative) - Design rules
Annex C (informative) - Services provided by the Safe
        Time Layer
Annex D (informative) - Definition of notation
Annex E (informative) - Safety Link Layer telegram
        sequences examples
Annex F (normative) - CRC Generator Polynomial and Application
        Rules
Annex G (informative) - Calculation of the CRC Length
Annex H (informative) - Services provided by the Safe link layer
Bibliography

Explains how to harmonise the communication means between onboard signalling safety systems and the driver-machine interface in the driver's desk.

This Technical Report defines, in accordance with the ERTMS/ETCS requirements: for each DMI function to be exchanged to and from the driver, including ETCS, STM: performances needed; degraded modes recovering; DMI Safety targets; communication system requirements: real-time capability; performances (bandwidth, etc.); expansion capability; RAMS; applicable standards; degraded modes; degraded modes management; interface with other systems; LCC requirements. Each item in the list above corresponds to one chapter of the present document. This Technical Report does not cover the following items: Train functions; STM “Separate DMI” as defined in document [1] regarding DMI equipment that is part of the STM itself; GSMR EIRENE functions; Ergonomics; Use of the ETCS DMI as a terminal server for maintenance purpose.