Dahua DH-XVR5104HS-4KL-I3 User Manual page 336

Step 2 Select Enable and configure parameters.
Parameter
Alarm-out Port
Post-Alarm
Buzzer
Alarm Tone
Log
Illegal login
Table 5-71 Illegal login parameters
Description
The alarm device (such as lights, sirens) is connected to the alarm output
port. When an alarm occurs, the NVR device transmits the alarm
information to the alarm device.
When the alarm ends, the alarm extended for a period of time. The time
range is from 0 seconds through 300 seconds.
Select the checkbox to activate the buzzer when an alarm occurs.
Check the box and then select the corresponding audio file from the
dropdown list. System plays the audio file when the alarm occurs.
See "5.17 Audio Management" to add audio file first
Select the checkbox, the NVR device records the alarm information in the
log when an alarm occurs.
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