What are the functions of the hotel three-in-one set-top box?

Three-in-one set-top box is a combination of optical cat, router and set-top box, which has the functions of three devices.

The function of optical cat is to convert optical fiber network signals into network signals. The role of the router is to provide network signals to users in the form of wifi. The function of the set-top box is to be able to watch all TV programs in China.