The hotel connects a network cable to each room and then uses a portable wireless router. Does it affect other rooms? What did the waiter say about the optical fiber now connected?

The original WI-FI hotel won't, but if it's wired, other rooms will be affected after you use the router, because if the general hotel uses optical fiber as the waiter said, it will bring its own converter, which will be affected after you use the router, and the network in other rooms will be disconnected or completely disconnected, so it is not recommended that you use it in the hotel, so other guests will be inconvenient and feel a little selfish.