# Commission Decision of 7 November 2006 concerning a technical specification for interoperability relating to the control-command and signalling subsystem of the trans-European high speed rail system and modifying Annex A to Decision 2006/679/EC concerning the technical specification for interoperability relating to the control-command and signalling subsystem of the trans-European conventional rail system (notified under document number C(2006) 5211) (Text with EEA relevance) (2006/860/EC), Division 2.2.2: Classes of Control-Command Systems

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

Within the Control-Command Subsystem two classes of train protection, radio communication, HABD and train detection systems are defined:
Class A: The unified Control-Command system.
Class B: Control-Command systems and applications existing before entry into force of the Directive 96/48/EC, limited to those described in Annex B.
In order to achieve Interoperability, the trains’ On-board Control-Command Assembly will provide:
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. For signalling data, this can be achieved with the use of a Specific Transmission Module (STM) that allows a Class A On-board system to operate on lines fitted with Class B Track-side system using the Class B data. The interface between the Class A On-board system and STM’s is defined in this TSI.
Member States have the responsibility to ensure that Class B systems are managed during their lifetime; in particular any changes to these specifications must not prejudice interoperability.

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Source: https://www.legislation.gov.uk/eudn/2006/860/annex/division/2/division/2.2/division/2.2.2 (the official version)
Page: https://openlegislation.uk/eu-decision-2006-860/annex/division-2/division-2.2/division-2.2.2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.