An annunciator panel, also known in some aircraft as the Centralized Warning Panel (CWP) or Caution Advisory Panel (CAP), is a group of lights used as a central indicator of status of equipment or systems in an aircraft, industrial process, building or other installation.

Functions of the annunciator panel vary from manufacturer to manufacturer, but they all serve the same purpose: detecting problems and alerting the user to where the problem started, what caused it, and what (if any) sprinklers or other devices are working.

An annunciator is an array of indicator lights and associated circuitry designed to secure a human operator’s attention by blinking and sounding an audible buzzer when a process changes into an abnormal state.