Lilin PSD4624EX20, Руководство пользователя

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Chapter 5-4-2 Audio Detection [Path: Advance>> Event >> Audio Detection]
When the detected sound exceeds the sensitivity level, the audio detector will trigger an alarm and
send a notification.
Chapter 5-4-3 Alarm Detection [Path: Advance>> Event>> Alarm Detection]
If you connect an external alarm digital input to the IP camera, enable Alarm Notification and
switch between NO (normally open) and NC (normally closed) for the input.