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4.4 Alarm Linkage
Alarm Linkage is the system reaction after an alarm signal is received. It is to raise watch
man's attention to handle the event.
The alarm signal comes from Motion Detection (details in Chapter 4.2) or Alarm Input Device
(such as smoke detector) in the surveillance area.
Alarm Linkage reaction includes Alarm Text Overlay, Snapshot or triggering alarm output
device (such as alarm bell). Explanations are as follows:
Report to Management System: when alarm is triggered, report to the central surveillance
system.
Text Overlay: when alarm is triggered, display alarm text on screen.
Acoustic Alarm: when alarm is triggered, make a warning sound.
Recording Linkage: when alarm is triggered, start to record video automatically.
Snapshot: when alarm is triggered, take a snapshot of the alarm event.
Alarm Output: when alarm is triggered, link to the alarm output device.
Picture 4-4 Shield Area Alarm
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