What are the internal and external lines of the hotel?

Inside the hotel is the contact information inside the hotel, and outside the hotel is the contact information outside the hotel. Hotel intranet refers to the telephone system used for communication in the hotel, which can communicate between various departments or rooms in the hotel. For example, customers who have stayed in the hotel can contact the front desk by calling the inside line. Hotel perimeter refers to the telephone system that can communicate with the outside of the hotel, such as the telephone that guests in other areas can dial when booking a hotel.