Installation guide

VAR4 / VAR12 / VAR20 - Product Description
3.2.1.6 Network Channel Mode
By default if a VAR-NIA is connected to VAR12 or VAR20, the VAR Router Inputs will be used as follows:
• Network Channel 1 – VAR Router Input 1
• Network Channel 2 – VAR Router Input 3
• Network Channel 3 – VAR Router Input 4
This is the Intellevac Network standard configuration with 3 network audio channels.
It is possible to implement fewer network channels where concurrent broadcast of ALERT, EVACUATE and
Fire Microphone audio is not required. The corresponding VAR12 or VAR20 inputs would then be available
for connection of local microphones or other audio sources.
3.2.1.7 Unused Mode
It is possible to set any of the Mic/Line inputs to “Unused” Mode. When configured for this mode of operation
they are excluded from routing and audio monitoring.
3.2.1.8 ‘Listen-in’ Function on Station Master Console
The ASL Station Master Console (SMC) functions as a normal Zoneable Fire Microphone with additional
‘listen-in’ function provided by an audio feed from the Aux Output (AUX-OUT) on the Control Port 1 of the
VAR Router which feeds a local amplifier and loudspeaker within the console. A key-switch programmable
by the VAR Router and an associated LED control the ‘listen-in’ function. The ‘listen-in’ key may be operated
in ‘Listen-to-All’ or ‘Selective Listen’ mode:
• ‘Listen-to-All’ mode
The audio sources, which are currently routed to outputs associated with zone select buttons, will be
mixed together and routed to the Aux Output. The ‘Listen-to-All’ mode is activated by momentarily
pressing the ‘listen-in’ key. Re-pressing the ‘listen-in’ key momentarily will deactivate the ‘listen-in’
function.
• ‘Selective Listen’ mode
The audio from the source associated with a selected zone is routed to the Aux Output. The ‘Selective
Listen’ mode is activated by holding down the ‘listen-in’ key while simultaneously pressing a zone select
button. It is possible to add other sources to the audio-mix by momentarily pressing the associated zone
select buttons. Re-pressing the listen-in key momentarily will deactivate the ‘listen-in’ function.
Activating the ‘listen-in’ function cause the listen-in LED on the microphone console to latches on.
When the ‘listen-in’ function is active, the normal paging operation will be barred. Neither the zone select nor
PTT buttons will have any effect.
While the ‘listen-in’ function is active, the audio-mix will update accordingly if the routed audio sources
change to the selected zone.
Issue: 03 complete, approved
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