Division Essential requirement 2.4.1 Section 5:

‘In the event of danger, devices must enable passengers to inform the driver and accompanying staff to contact him.’

This requirement concerns the indications given to passengers relating to the passenger alarm signal. The various functions of the public address system and of the intercom between the driver and the train crew are intended to respond to this requirement.

The relevant characteristics to validate in respect of this TSI are defined in Section 4.2.12.