Chapter 4: Supplementary applications
88 EST3X Technical Reference Manual
Automatic messaging
One of the features of the 3X-PMI is the method used to monitor the integrity of
the digital audio system. When an audio messaging system is configured, default
audio messages are recorded for the EVAC and Alert channels. The text of
default messages should be generic in nature, and should not include location
specific instructions. When the system is in the normal condition, the 3X-PMI
continuously transmits default messages over the network audio riser. The zone
amplifiers use the default messages to verify their operational integrity, as well as
the integrity of the riser wiring.
When an alarm is detected, the evacuation and alert message channels are
selected by the amplifiers in the appropriate areas in the facility, as directed by
the system rules. If a specific evacuation message has been programmed to play
in response to the alarm, it is sent out over the evacuation channel. Location
specific evacuation messages contain information and instructions that should
only be used for a specific alarm location. Should a second alarm from another
location be received, the evacuation message playing as a result of the first
alarm may not be appropriate for the second alarm.
Note: In the event of conflicting messaging instructions caused by multiple alarm
events, the system will play the default evacuation message whenever two or
more different messages are requested at the same time on the evacuation
channel. By reverting to the generic default evacuation message in multiple
alarm location scenarios, no one can be misdirected by the wrong message.
Default messages also play during alarms when no location specific message
has been requested.
Testing the audio system integrity
Activate prerecorded audio messages stored in the 3X-PMI to test the integrity of
the digital audio system.
To test the audio system integrity:
1. Access the Main Menu, and then click Activate.
2. Click Audio Message, and then enter the panel, card, device, and channel
addresses.
3. Enter your access level password.
4. When finished, access the Main Menu, and then click Restore.
5. Click Audio Message, and then enter the panel, card, device, and channel
addresses.
6. If required, enter your access level password.
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