How can cabin crew call the flight crew using the interphone?

The process for cabin crew to communicate with the flight crew using the interphone system is specific and streamlined to ensure clarity during operations. The correct method involves using the designated digits, which are 2 for a normal call and 222 for emergencies. This system allows cabin crew to alert the flight crew quickly and effectively, especially in situations that require immediate attention, such as emergencies.

Using the number 2 for normal calls ensures that the flight crew can differentiate between routine communication and more urgent matters, while the number 222 is specifically designated for emergencies, allowing for an efficient response during critical situations. This differentiation is crucial for maintaining safety and operational efficiency in the cabin environment.

Other choices do not align with the established protocols for interphone communication among cabin and flight crews. Thus, relying on the correct numbers ensures that communication is handled in accordance with procedures that prioritize safety and effectiveness in the cabin crew's interactions with the flight crew.