Division 4 CHARACTERISATION OF THE SUBSYSTEM

The trans-European high-speed rail system, to which Directive 96/48/EC applies and of which the control-command subsystem is a part, is an integrated system which requires the functions, interfaces and performance (all of which are basic parameters) to be verified, in particular so as to ensure that the system is interoperable and that the essential requirements are met. Annex A lists the mandatory European specifications for the class A functions, interfaces and performance; Annex B lists the characteristics of the class B systems and the responsible Member States. The control-command characterisation is presented in the following order:

• functions

• interfaces internal to control-command

• interfaces to other TSIs

• performance.

The STMs, which enable the class A system to operate over class B infrastructure, are subject to the class B system requirements. The implementation of the class A functions and interfaces and the transition to it from the class B systems are subject to the requirements of section 7.

The TSI control-command describes the ERTMS characteristics, in accordance with the Directive 96/48/EC.

The basic parameters of the class B equipment are the subject of Annex B.