Dahua NVR21-4KS3 Series User Manual page 336

2. Select the channel to add the camera audio, and then click OK.
If the camera audio configuration of multiple channels has been configured, when an
alarm event is triggered, the multiple channels can link to the corresponding camera
audio.
Click Setting next to Remote Warning Light to configure the remote warning light.
Step 8
1. Click Add, and the page displays all channels that have successfully connected and
support the remote warning light configuration.
If a certain channel is selected in Alarm-in Port and supports the remote warning light
configuration, the remote warning light configuration of this channel will be displayed
by default, and you cannot delete it.
a. Select Mode and Flicker Frequency of the remote warning light.
b. Configure Stay Time, supports a maximum of 30 seconds.
c. Click Copy to copy the remote warning light configuration of the current channel to
other channels.
d. Click
delete multiple channels.
Figure 5-207 Set the camera audio
to delete one channel. Select multiple channels, and then click Delete to
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