From Chrome browser, access to web interface on U4 box.
IP Address of U4 box:9981
Example : 192.168.0.118:9981
After access Web Interface, please go Configuration ==> DVB Inputs ==> IPTV and select "Add Service"
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When you select "add Service" then you will have one channel on Web page.
Put Channel Name what you want,
On Group option, put protocol of channel and IP:port information like above photo.
Protocol://IPAddress(Domain Name):Port
After press "save changes" , then your channel will save on U4 box.
On IPTV menu, you can see your channel list. and enjoy IPTV
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Enjoy with IPTV channel with U4 box.