ASL INTERCOM VAR8 Operation And Maintenance Manual page 50

VAR8 and Variants Operation, Commissioning, Fault Finding, and Maintenance Guide
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Latched:
This mode is normally used for emergency DVA message routes, but can also be of use for routing
other inputs.
When configured for latching operation pressing a DVA Routing button initiates a route; and pressing
the associated reset button terminates it.
A group of 'DVA Routing' buttons may share a single reset button, or each button may have its own
dedicated reset. If multiple DVA routes have been triggered by consecutive triggers in a single
group, the activation of that group's 'reset' line will terminate all of the DVA routes associated with
that reset.
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Play Once:
This mode is only used for the control of DVA routes.
When configure for 'Play Once' mode, pressing a 'DVA Routing' plays the DVAs associated with the
route once only. When the DVA has completed its full message cycle, the route is automatically
terminated.
6. Select if the DVA should play until the end of the message and then stop (DVA-Full), or cease playing
immediately that the route is terminated (DVA-Part).
This setting is only relevant when a DVA Routing button is used for control of DVA routes.
Menu: Configuration System Router Inputs Mic/Line I/P #<nn> <mic type> Buttons
Note that if the DVA is configured to 'Play Once', this setting should be 'DVA-Full'.
7. Select if the route should cause busy indication on the LEDs associated with microphone zone select
buttons.
Menu: Configuration System Router Inputs Mic/Line I/P #<nn> <mic type> Buttons
This is typically set to 'On' when routing DVAs or microphone audio, and to 'Off' when routing
background music.
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DVA Routing Control DVA-Full or DVA-Part
DVA Routing Control Busy=On or Busy=Off