Dahua XVR User Manual page 142

 Less than: System can alarm you when the HDD space is less than the threshold
you set here (For HDD no space type only).
 Latch: Here you can set corresponding delaying time. The value ranges from 0s-300s.
System automatically delays specified seconds in turning off alarm and activated
output after external alarm cancelled. When the value is 0, there is no latch time.
High temperature: In Device interface (Figure 3-146), select High temperature from

the dropdown list, and then input the max temperature. The value ranges from 30℃～
90℃. Device can trigger an alarm once the case temperature is higher than the value
you set.
 Fan speed abnormal: In Device interface (Figure 3-146), select Fan speed abnormal
from the dropdown list, and then click the OK button after the Fan calibration. It can
correct fan manually. Please note we recommend this function after you replaced or
maintained the fan.
 Show message: system can pop up the message in the local screen to alert you
when an alarm occurs.
Alarm upload: System can upload the alarm signal to the network (including alarm

center) if you enabled current function. For disconnection event, IP conflict event
and MAC conflict event, this function is null.
 Send email: System can send out email to alert you when an alarm occurs.
 Buzzer: Highlight the icon to enable this function. The buzzer beeps when an alarm
occurs.
 Log: Check the box here, system can record HDD event log.

Voice prompts: Check the box here to trigger audio broadcast function. You can
select specified audio file here. System can play the audio file once the corresponding
event occurs.
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