How is FA to FA communication over the interphone signaled on the ERJ 175?

In the context of interphone communication on the ERJ 175, when a flight attendant attempts to communicate with another flight attendant (FA to FA), there is no specific alert or signal system indicated, which is why the option stating "nothing" is seen as the correct response. This means that when one flight attendant activates the interphone to reach out to another, no audible alert or distinctive light illuminates to indicate this communication.

The communication relies on the assumption that the receiving flight attendant will be attentive to the interphone use at that moment, allowing them to respond without any additional prompts. This operational design emphasizes direct communication and situational awareness among the flight attendant team, rather than depend on external signals or alerts, ensuring that they can maintain a level of professionalism and focus on cabin responsibilities.