Panasonic BL-C210 Series Operating Instructions Manual page 175

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When you set [Trigger for Built-in Alarm] to [Button or sensor] or [Sensor only], configure the camera
to buffer and transfer images (see Page 54) so that the built-in alarm can sound when the built-in
sensor, external sensor, or motion detection is triggered.
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The built-in alarm does not sound even if [Trigger for Built-in Alarm] is set to [Button or sensor] or
[Sensor only] while the camera is in privacy mode (Page 170) or in registration mode (Page 172).
7.8 Built-in Alarm Settings
Operating Instructions 175