The Staff Audio Interface (SAI) is an audio public address system for broadcasting music,delivering high - priority warnings to the passengers which allows also interphone communication with locomotive cab and central control point.
The 30 Watt D class high - efficiency coach audio amplifier is in compliance with UIC568 standard. The SAI interfaces to the train’s data bus in order to receive the audio signal, to amplify and transmit it to the passengers and train’s crew.
It is equipped with a handset with a Push to Talk (PTT)pushbutton and other buttons and switches to control the complete audio system.
The SAI is electronically and mechanically interchangeable with the coach’s audio units currently in use on existing rolling stock.