| 摘要 |
Disclosed is a telephone exchange system comprising: a connection interface which connects a communication circuit and a plurality of extension telephones; a database section which has a dial-in conversion table that associates and registers the receiving number of a dial-in incoming call and the number after conversion of the receiving number, and an extension number table that associates and registers the extension telephones and the extension numbers of the extension telephones; and a main control section which is connected to the connection interface and the database section. When there is a dial-in incoming call from the communication circuit, the main control section searches the extension number table for the extension number that matches the receiving number of the dial-in incoming call, and causes the extension telephone corresponding to the extension number to ring if there is an extension number that matches the receiving number. |
