Audio Annunciation System: Conversational annunciation system are with visual indicator and common audio alarm. Many times after acknowledgement of alarm visual indication is not visible from longer distance. These possibilities are eliminated in Audio Annunciation system. Common speaker will announce the fault which enable's operator to take immediate remedial action which is not possible in visual annunciation system as operator is away from the panel. However additional visual indication may be given by lamp, Legend Lamp, or Annunciation window.