What is the crew to crew call signal?

The crew to crew call signal is indicated by the high low chime in red. This specific signal is distinct and serves an important purpose in communication among the cabin crew during flight operations. The use of a red high-low chime is typically prioritized, as it alerts crew members that there is a need for immediate attention or communication among them, distinguishing it from passenger calls or other alerts. This helps ensure that crew members can address any urgent matters swiftly, which is critical for maintaining safety and service on board the aircraft. The clarity of this signaling also prevents confusion, enabling a streamlined response among crew members.