What color will illuminate on the interphone for a non-emergency call from the flight deck on the CRJ 200?

The interphone system on the CRJ 200 is designed to use specific colors to indicate different types of communication. For non-emergency calls from the flight deck, the system is set to illuminate a green light. This is a standardized feature that helps crew members quickly identify the nature of the call without confusion.

The choice of green for non-emergency communications is significant, as it visually differentiates such calls from emergency signals or more critical communications, which may use different colors. Understanding this color-coding system is essential for maintaining efficient and effective communication within the aircraft, especially in high-stress situations where clarity is paramount.

In contrast, other colors are typically reserved for specific functions, such as red for urgent situations, which helps to prioritize responses appropriately. This color differentiation aids crew members in quickly assessing communication priorities during operations.