Division 4.1.2.2 Interfaces between on-board interoperability constituents essential to interoperability

The data communications characteristics of each interface shall be such as to enable the requirements of the functions and failure modes to be met.

1. (a)

   The interface between the class A radio and the cab-signalling/automatic train protection functions. These requirements are specified in Annex A, index 13a.

2. (b)

   Access to data recorded on-board for regulatory purposes. Each Member State shall have access to the recorded data that meets obligatory data-recording requirements for official and investigative purposes. This interface and the data formats are specified in Annex A, index 13b.

3. (c)

   Odometry: the interface between the odometry function and ETCS on-board functions shall meet the requirements of Annex A, index 13c.

4. (d)

   The STM interface: the interface between the class A functions and the STMs of Annex B is defined in Annex A, index 6.