The Audio Coach Controller (ACC) is the device that brings audio messages to your passengers. It enables you to provide passenger information or to entertain them by offering music, operating control center announcements or other relevant audio messages. Grade of service is high as it offers VoIP as well as UIC568 audio fallback solution. Even if parts fail the design allows limited operation. You can connect up to 4 loudspeaker networks and two passenger communication units of Luminator’s PIS audio and visual system towards the ACC. The small box design allows easy integration even under limited space environment.