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This configuration window is used to set the parameters for the Boundary Alarm, and is accessible on the Alarms Tab > Add Alarm > Boundary Alarms.
Click on the interactive image below for more information.
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Boundary
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If using Pick Feature, this will default to the feature name, but it may be manually altered. If using Draw Fence, a short descriptive name should be entered here manually.
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Alarm Type
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This will either show as "Alarm on Enter," or "Alarm on Exit" based on which one is selected.
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Dwell Time
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The dwell time setting specifies how long a vehicle must be across the boundary before an alarm is triggered. Specify a low duration here, like 1 second, to immediately be notified whenever they cross the boundary; alternatively, specify a high duration here, like hours or even days, if interested in prolonged violations. The latter will eliminate alarms being triggered anytime a unit momentarily drives outside the boundary and back. The AVL Server only scans alarm conditions once every 10 seconds so there is effectively a 10 second dwell time on all boundary alarms.
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Notes:
•Whenever a vehicle triggers an entrance alarm by driving into a special area, no additional entrance alarms will be trigger for that same vehicle as it drives within the area until it leaves the area and re-enters. Likewise, when a vehicle triggers an exit alarm, no additional alarms will occur until it return to the boundary and exits again.
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