What type of fire alarm annunciation system identifies the zone of origin at the alarm control panel and the audio notification devices?

• A. Remote
• B. Wired
• C. Coded
• D. Central

Answer: (C)

In a coded fire alarm annunciation system, each zone is assigned a distinct code that travels with the alarm signal. This code lets the control panel immediately identify the exact zone where the fire or fault originated, and the same coding is used by the audio notification devices to coordinate and indicate that zone. This setup provides clear, precise localization at the panel and at the devices, speeding evacuation and response. Other types—remote annunciation, central annunciation, or simply wired—do not inherently specify zone information at both the panel and each notification device in the same way.