The over door light is positioned outside a room giving a clear visual indication of the call status of the room. This eases room identification in a scenario where checking a display and locating the room could cause significant delay in an emergency.
When paired to multiple call points, the highest priority call is displayed, e.g. emergency, and are ideal for end of corridor usage to show which direction the call is coming from.
The light also displays staff presence as well as call status, and can provide a good overview of which rooms are being attended.