What is the indication for the FA indicator panel on the ERJ 175 when there is no communication?

The FA indicator panel on the ERJ 175 is designed to reflect the status of communication between the flight attendants and the flight deck. When there is no communication from the flight deck, the indicator will not illuminate, meaning there will be no lights or signals present on the panel. This lack of illumination indicates that the flight attendants should be aware that no messages or instructions have been sent from the cockpit.

The purpose of this system is to ensure that flight attendants can quickly assess the communication status. The absence of lights serves as an efficient means of conveying that there is no active communication, differentiating it from other indicators that would signal a need for attention or response.