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• All Clear Switch – When programmed, this switch plays the All Clear Message on manually-selected
speaker circuits. When this switch is placed in the UP position, the All Clear Message is played. When this
switch is placed in the DOWN position, the All Clear Message is silenced. The associated LED tracks the ON
position of the switch, if programmed.
• Aux Functions Switch – When programmed, this switch plays optional tones/messages on pre-selected
speaker circuits on the programmed channel. When this switch is placed in the UP position, the tone/message
is played. When this switch is placed in the DOWN position, the tone/message is silenced. The associated
LED tracks the ON position of the switch, if programmed. A special program can be written to allow this switch
to activate the message and turn ON all desired speaker circuits.
• Phone Paging Switch – When programmed, this switch is used to connect the firefighter’s phone line to the
ALERT channel. Placing this switch in the UP position is like keying the microphone. Placing this switch in the
DOWN position, disconnects the firefighter’s phone line from the ALERT channel. The LED is ON when the
phone line is connected to the ALERT channel.
NOTE: If this switch is activated while a microphone is keyed, the Master Microphone has priority, followed
by Remote Microphone No.1, Remote Microphone No.2, and finally the phone.
• Manual Audio Override Switch – Activation of this switch causes a system trouble to occur because it stops
all future automatically- generated tones/messages from playing. However, it does not silence any tone/
message which is in progress. The associated yellow LED is ON when the switch is in the override state (UP
position).
• All Speakers Minus Switch – When this switch is activated, all speaker circuits not playing the Evacuation
or Alert tone/message are switched to the TALK channel and turned ON. When this switch is placed in the
OFF position, the speakers switched to the TALK channel are turned OFF, but the speakers associated with
the ALERT and EVAC channels are not affected. The associated red LED is turned ON to indicate that the
speakers are switched to the TALK channel.
SPEAKER SELECT SWITCHES AND LEDs
Triple channel audio requires two momentary switches and four LEDs per speaker circuit. Thus, the triple channel
LED/Switch module uses eight three-position momentary switches with sixteen associated LEDs to control four
speaker circuits.
The upper momentary switch for each speaker circuit is used to switch the circuit to the proper channel, and to turn
the circuit ON. The lower switch is used to select the TALK channel, and to turn the speaker circuit OFF.
Each switch has two LEDs associated with it to indicate its operation. On the upper switch, the red LED indicates an
active EVAC channel. The green LED indicates an active ALERT channel. On the lower switch, the red LED is used
to indicate an active TALK channel. The yellow LED indicates a speaker circuit trouble. When the speaker circuits
are turned OFF, signals are routed to Channel 1.
TRIPLE CHANNEL AUDIO SYSTEM OPERATION
The following operations are for Triple Channel Audio systems.
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