UFC 4-021-01
18 DECEMBER 2002
Figure 2-1. Individual Building Mass Notification System
Fire Alarm
System
Temporarily Deactivate
Audible Fire Alarm Appliances
Speakers
Strobes
Autonomous
Control
Unit
Battery
Backup
Displays (Optional)
Notification
Appliance Network
Conductor Integrity Monitoring
Required
Local Operator Console
Individual Building System
2-4.1.2 Use of Existing Public Address or Intercommunication Systems. Figure
2-2 provides the logical block diagram showing the use of an existing public address or
intercommunication system for mass notification. (Note that the term "public address
system" is subsequently used in this UFC to mean both public address and
intercommunication systems.) Use of the speakers and other components in the
existing public address system may be appropriate in buildings in which the installation
of a new speaker system is not cost-effective. If this implementation approach is taken,
an individual building mass notification system with the features described in this UFC
must be interfaced with an existing public address system. The existing public address
system must be tested to demonstrate acceptable intelligibility of the voice messages,
and additional speakers added as necessary. Features must be provided in the public
address system to ensure that emergency messages have priority over non-emergency
messages.
2-3
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