9-2
This section describes the single channel and single channel plus paging audio systems. The term
Single Channel Audio refers to the audio capability of the system.
A Single Channel Audio system has the ability to play pre-recorded messages or live audio
messages, but it cannot do both at one time. For example, suppose the building’s audio
system is divided into eight groups, each of which represents a floor of the building. A single
channel audio system can play a pre-recorded message or live audio one floor at a time.
FACP MAIN CONTROL PANEL
FIRE ALARM
SILENCED LED
FIRE ALARM
SILENCED KEY
RED FIRE ALARM LED
FIRE ALARM
ACKNOWLEDGE KEY
TALK LED
MIKE TALK SWITCH
IN
CONTROL
ALL
SPEAKERS
EVAC
SELECTIVE
EVAC
READY
TO
TALK
ALL
SPEAKERS
TALK
LOCAL
SPEAKER
EVAC
8th
Flr.
7th
Flr.
6th
Flr.
5th
Flr.
4th
Flr.
3rd
Flr.
2nd
Flr.
1st
Flr.
PHONE
PIEZO
SILENCE
PHONE 8
CIRCUIT
PHONE 9
CIRCUIT
PHONE 10
CIRCUIT
PHONE 11
CIRCUIT
PHONE 12
CIRCUIT
PHONE 1
CIRCUIT3
PHONE 14
CIRCUIT
PHONE 15
CIRCUIT
PHONE 1
CIRCUIT
PHONE 2
CIRCUIT
PHONE 3
CIRCUIT
PHONE 4
CIRCUIT
PHONE 5
CIRCUIT
PHONE 6
CIRCUIT
PHONE 7
CIRCUIT
OPERATION SELECT
SWITCHES
SPEAKER SELECT
SWITCHES
PHONE SELECT
SWITCHES
PHONE SELECT
SWITCHES
Figure 9–1. Single Channel Audio
Continued on next page
34B
Single Channel Audio Operation
126B
Overview
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