This is Airbus's proprietary training system. It uses interactive 3D animations, videos, and graphics to explain complex aircraft systems, such as hydraulics or fly-by-wire.
To understand its significance, we must first break down the term:
The Communications system (ATA 23) on the Airbus A330 allows the crew to communicate internally (interphone), externally (with Air Traffic Control and ground crews), and provides entertainment systems for passengers. The system is highly integrated with the Electronic Instrument System (EIS) and the Air Traffic and Information Management System (ATIMS).