Division 2.2.2 CLASSES OF CONTROL-COMMAND INTERFACES BETWEEN TRACK AND TRAIN

Interoperability of the control-command functions is to be founded upon the development of unified specifications of the interfaces which provide for interoperability. In the meantime, the specification of the interfaces presently used for interoperable services (termed class B) are subject to the requirements of this TSI. Each class B specification shall be managed as follows. Member States have the responsibility to ensure that during their life the class B systems are managed in the interests of interoperability, in particular any changes to these specifications are to be managed such that interoperability is not prejudiced.

Two classes of control-command interfaces between track and train are defined:

class A

the unified control-command interfaces — these interfaces are defined in Chapter 4. Annex A includes the specifications that define the interoperability requirements of the class A control-command interfaces,

class B

control-command interfaces and applications existing before entry into force of Directive 96/48/EC limited to those described in Annex B. These can be implemented as STMs^f1.

In order to achieve interoperability, the trains' on-board control-command assembly will consist of:

• the class A radio and data communication interfaces to the infrastructure, in case of operation with class A Infrastructure,

• the class B radio and data communication interfaces to the infrastructure, in case of operation with class B infrastructure.

Section 7 describes the requirements for the transition phase from the class B interfaces to the class A interfaces for radio and for signalling purposes.