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AXIS Q7411 Video Encoder
Detectors
Detectors
Camera Tampering
Camera Tampering can generate an alarm whenever the camera is repositioned, or when the lens is covered, spray-painted or severely
defocused. To send an alarm, for example an email, an action rule must be set up.
To congure tampering detection:
1. Go to Detectors > Camera Tampering.
2. Set the Minimum duration, that is, the time that must elapse before an alarm is generated. Increase time to prevent
false alarms for known conditions that affect the image.
3. Select Alarm for dark images if an alarm should be generated if lights are dimmed or turned off, or if the lens is sprayed,
covered, or rendered severely out of focus.
4. Click Save.
To congure the product to send an alarm when tampering occurs:
1. Go to Events > Action Rules.
2. Click Add to set up a new action rule.
3. Enter a Name for the action rule.
4. Under Condition, select Detectors from the Trigger list.
5. Select Tampering from the list of detectors.
6. Optionally, select a schedule and set additional conditions.
7. Select the action. To send an email, select Send Notication and select a Recipient from the list of dened recipients.
Note
The While the rule is active option under Duration cannot be used with camera tampering, since camera tampering does not
have a duration and once it has been triggered it will not automatically return to its untriggered state.
For more information on actions rules, see Events on page 39.
Audio Detection
The Axis product can be congured to generate an alarm when audio rises above or falls below the threshold value. The threshold
value can be set in the range 0–100 where 0 is the most sensitive and 100 the least sensitive.
1. Go to Detectors > Audio Detection.
2. Set the audio alarm level and click Save.
3. Go to Events > Action Rules and set up an action rule, see Set Up Action Rules on page 39.
Detected audio is indicated by colored peaks in the Activity indicator. An event is triggered when detected audio rises above or falls
below the threshold value, which is represented by the bar.
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