The Passenger Communication Unit (PCU) is the interface for bi-directional communication from the passenger to the train driver if needed. It can be easily connected to the Audio Car Controller (ACC) taking care for the transmission of the voice communication regardless whether VoIP or analog UIC568 voice is necessary.

For connecting the PCU offers 3 options:

• PoE and ETH switch saves switch connects and needs less cabling.
• Power supply combined with 2 x ETH saves switch connects based on Daisy chain
• Power supply and ETH as the ‘standard’ solution