How to install a telephone system in a hotel? How to charge? Come on, everybody, 3Q.

Install a special telephone exchange equipment in the hotel. All rooms have extension numbers and the number of lines connected to the outside line, which is convenient for guests to dial the outside line. Billing can be realized by installing telephone exchange software on the computer at a glance. Generally, there are more than a dozen rooms, and two or three outside lines can be installed. See if there is a local telephone exchange that can charge.