The VCS is triggered by either automatic or manual fire detection signals. A design engineer divides the building into zones, preparing tailored voice messages for each zone. These messages are pre-recorded, stored, and configured based on the specific fire zone.
Upon receiving a fire detection signal, the VCS automatically broadcasts a pre-recorded fire alarm message to the relevant zone and any other designated speakers, as per the system configuration.
Digitized voice messages shall consist of a 3-second alert tone, followed by a clear announcement detailing the affected fire alarm zone (e.g., "Attention, please. Fire alarm reported in the seventh-floor electrical panel room").