User's Manual
257
Table 4-46
Parameter Description
Channel Select a channel from the dropdown list.
Enable Check the box to enable the function.
Global Check the box to enable global crowd distribution alarm.
Crowd Density
Configure the alarm threshold. The default setup is 4 persons/
㎡
. The
value ranges from 2 to 10.
Period
Configure the period and in the set time range, the corresponding
configuration item will be linked to start the alarm.
Alarm Out
The alarm device (such as lights, sirens, etc.) is connected to the alarm
output port. When an alarm occurs, the NVR device transmits the alarm
information to the alarm device.
Latch
When the alarm ends, the alarm extended for a period of time. The time
range is from 0 seconds to 300 seconds.
Alarm Upload
Select the check box. When an alarm occurs, the NVR device uploads an
alarm signal to the network (including the alarm center).
●
This function is for some series products only.
●
You need to set the alarm center first. For details, see "4.11.14
Alarm Center".
Send Email
Select the check box. When an alarm occurs, the NVR device sends an
email to the set mailbox to notify the user.
You need to set the email first. For details, see "4.11.11 Email".
Record Channel
Select the check box and select the needed recording channel (support
multiple choices). When an alarm occurs, the NVR device activates the
channel for recording.
You need to enable intelligent recording and auto recording first. For
details, see "4.1.4.6 Schedule".
PTZ Activation
Select the check box and click Setting to select the channel and PTZ
action. When an alarm occurs, the NVR device associates the channel to
perform the corresponding PTZ action. For example, activate the PTZ in
channel one to turn to the preset point X.
●
Tripwire alarm supports to activate PTZ preset point only.
●
You need to set the corresponding PTZ actions first, see "4.4.4
Calling PTZ Functions".
Delay
At the end of the alarm, the recording extends for a period of time. The
time range is from 10 seconds to 300 seconds.
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