What is the function of the Interphone System?

The Interphone System serves a critical function in ensuring effective communication between the flight deck and flight attendants. This system enables flight attendants to relay important information, receive instructions, and communicate emergencies or irregularities directly to the pilots. Clear communication is essential during various phases of flight for safety and operational efficiency, making the Interphone a vital tool for cabin crew.

In contrast, communication among passengers is typically facilitated by personal devices or by flight attendants themselves rather than through the interphone system. Monitoring in-flight entertainment and controlling cabin temperature also fall under different systems, such as the cabin management system or in-flight entertainment systems, which are not part of the interphone's capabilities. Thus, the unique function of the interphone is focused on critical two-way communications between the cabin crew and the cockpit.