Unicom's fiber-optic broadband customers, generally the LAN2 of optical cats is the TV set-top box interface represented by IPTV, and some optical cats will have standards at the interface;

If you can't find the relevant interface after connecting to LAN2 or the network cable connected to the TV set-top box can't be used normally, you can call the local Unicom manual customer service to report the error, and the local maintenance personnel will come to your door to handle it for you.