Dahua NVR21-4KS3 Series User Manual page 335

Click Setting next to Schedule to configure the alarm schedule.
Step 3
Step 4 Configure the anti-dither period.
If multiple alarms occur during the anti-dither period, the system only record the event
once.
Step 5 Configure alarm linkage. For details, see Table 5-50.
Enable Disarming so that you can connect a switch to the alarm input port for disarming
Step 6
control.
Step 7 Click Setting next to Camera Audio to configure the camera audio.
1. Click Add, and the page displays all channels that have successfully connected and
support the camera audio configuration.
If a certain channel is selected in Alarm-in Port and supports the camera audio
configuration, the camera audio configuration of this channel will be displayed by
default, and you cannot delete or reset play times.
a. Select the audio file under the File Name drop-down list.
b. Configure Play Times, supports a maximum of 10 times.
c. Click Copy to copy the camera audio configuration of the current channel to other
channels.
d. Click
delete multiple channels.
Figure 5-206 Local alarm
to delete one channel. Select multiple channels, and then click Delete to
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User's Manual