Dahua HCVR2108C-S2 Series, User Manual, Page: 478 / 499

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There are following possibilities:

Check the camera is online or not.

Check IP channel setup is right or not (such as IP address, user name, password,
connection protocol, port number.).

The camera has set the whitelist (Only the specified devices can connect to the
camera).
30. After I connected to the IP channel, there one-window output is OK, but there is
no multiple-window output.
There are following possibilities:

Check the sub stream of the camera has been enabled or not.

Check the sub stream type of the camera is H.264 or not.

Check the device supports camera sub stream resolution or not (such as 960H,
D1, HD1 and etc.).
31. After I connected to the IP channel, there multiple-window output is OK, but
there is no one-window output.
There are following possibilities:

Check there is video from the IP channel or not. Please go to the main
menu->info->System->BPS to view bit stream real-time information.

Check the main stream of the camera has been enabled or not.

Check the main stream type of the camera is H.264 or not.

Check the device supports camera main stream resolution or not (such as 960H,
D1, HD1 and etc.).

Check camera network transmission has reached the threshold or not. Please
check the online user of the camera.
32. After I connected to the IP channel, there is no video output in the one-window
or the multiple-window mode. But I can see there is bit stream.
There are following possibilities:

Check the main stream/sub stream type of the camera is H.264 or not.

Check the device supports camera main stream/sub stream resolution or not
(such as 1080P, 720P, 960H, D1, HD1 and etc.).

Check the camera setup. Please make sure It supports the products of other
manufacturers.
33. DDNS registration failed or can not access the device domain name.
There are following possibilities:

Check the device is connected to the WAN. Please check the device has got the
IP address if the PPPoE can dial. If there is a router, please check the router to
make sure the device IP is online.

Check the corresponding protocol of the DDNS is enabled. Check the DDNS
function is OK or not.