# 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 4.2.1: THE EXTERNAL CLASS A INTERFACES REQUIRED FOR INTEROPERABILITY

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

This section specifies the external interfaces of the control-command subsystem, as defined in this TSI, to the other TSI subsystems that are essential to interoperability. For the energy TSI, there are indirect requirements via the rolling stock TSI concerning in particular EMC. The external interfaces are:
the operations interfaces, comprised of:
A.. functional and procedural requirements, ergonomics, and understanding of the MMI;
B.. functional requirements of data-recording;
C.. role of radio, and understanding;
the rolling stock interfaces, comprised of:
A.. the guaranteed train braking performance and characteristics;
B.. compatibility between track-based systems and the rolling stock (ETCS Level 1 and 2);
C.. vehicle geometry and movement; the relationship of the antennae to the structure and kinematic gauges and track-geometry, including vehicle behaviour;
D.. installation matters:
the physical environment,
electromagnetic compatibility (EMC) with the on-board electrical environment;
E.. train data interfaces:
brakes,
train integrity,
train length;
F.. Electromagnetic compatibility between rolling stock and infrastructure systems;
the infrastructure interfaces, comprised of:
installation requirements.
The relevant standards are referenced, and these are listed in Annex A. The following explanations cover the major issues.

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Source: https://www.legislation.gov.uk/eudn/2002/731/annex/division/4/division/4.2/division/4.2.1 (the official version)
Page: https://openlegislation.uk/eu-decision-2002-731/annex/division-4/division-4.2/division-4.2.1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.