# Commission Decision of 30 May 2002 concerning the technical specification for interoperability relating to the control-command and signalling subsystem of the trans-European high-speed rail system referred to in Article 6(1) of Council Directive 96/48/EC (notified under document number C(2002) 1947) (Text with EEA relevance) (2002/731/EC), Division 4.1.2.2: Interfaces between on-board interoperability constituents essential to interoperability

Extent: E+W+S+N.I.

The data communications characteristics of each interface shall be such as to enable the requirements of the functions and failure modes to be met.
(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.
(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.
(c) Odometry: the interface between the odometry function and ETCS on-board functions shall meet the requirements of Annex A, index 13c.
(d) The STM interface: the interface between the class A functions and the STMs of Annex B is defined in Annex A, index 6.

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Source: https://www.legislation.gov.uk/eudn/2002/731/annex/division/4/division/4.1/division/4.1.2/division/4.1.2.2 (the official version)
Page: https://openlegislation.uk/eu-decision-2002-731/annex/division-4/division-4.1/division-4.1.2/division-4.1.2.2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.