Telephone exchange system, dial-in incoming call method thereof, and dial-in incoming call program thereof

A telephone exchange system, comprising:

• a connection interface connecting a communication line with a plurality of extension telephones;
• a database including:
• a dial-in conversion table registering a received number of a dial-in incoming call from the communication line in association with a number after conversion of the received number;
• and
• an extension number table registering an extension telephone of the plurality of extension telephones in association with an extension number of the extension telephone;
• and
• a main controller, comprising a processor, connected to the connection interface and the database,
• wherein the main controller sets in advance whether, when the dial-in incoming call comes, the dial-in conversion table is used or the extension number table is used and, in a case where the use of the dial-in conversion table is set in advance, retrieves the number after conversion coinciding with the received number from the dial-in conversion table when the dial-in incoming call comes, retrieves the extension number coinciding with the received number from the extension number table when there is no number after conversion coinciding with the received number, and causes the extension telephone corresponding to the extension number to ring when there is the extension number coinciding with the received number.

A dial-in incoming call receiving method of a telephone exchange system including a connection interface connecting a communication line with a plurality of extension telephones, a database including a dial-in conversion table registering a received number of a dial-in incoming call from the communication line in association with a number after conversion of the received number, and an extension number table registering the extension telephone in association with an extension number of the extension telephone, and a main controller, comprising a processor, connected to the connection interface and the database, wherein the main controller executes the dial-in incoming call receiving method,

• the dial-in incoming call receiving method comprising:
• setting in advance whether, when the dial-in incoming call comes, the dial-in conversion table is used or the extension number table is used;
• and
• in the case where the use of the extension number table is set in advance, retrieving the extension number coinciding with the received number from the extension number table when the dial-in incoming call comes, and causing the extension telephone corresponding to the extension number to ring when there is the extension number coinciding with the received number.

A dial-in incoming call receiving method of a telephone exchange system including a connection interface connecting a communication line with a plurality of extension telephones, a database including a dial-in conversion table registering a received number of a dial-in incoming call from the communication line in association with a number after conversion of the received number, and an extension number table registering the extension telephone in association with an extension number of the extension telephone, and a main controller, comprising a processor, connected to the connection interface and the database, wherein the main controller executes the dial-in incoming call receiving method,

• the dial-in incoming call receiving method comprising:
• setting in advance whether, when the dial-in incoming call comes, the dial-in conversion table is used or the extension number table is used;
• and
• in the case where the use of the dial-in conversion table is set in advance, retrieving the number after conversion coinciding with received number from the dial-in conversion table when the dial-in incoming call comes, retrieving the extension number coinciding with the received number from the extension number table when there is no number after conversion coinciding with the received number, and causing the extension telephone corresponding to the extension number to ring when there is the extension number coinciding with the received number.

A non-transistory computer readable medium having recorded thereon a program for a dial-in incoming call of a telephone exchange system including a connection interface connecting a communication line with a plurality of extension telephones, a database including a dial-in conversion table registering a received number of a dial-in incoming call from the communication line in association with a number after conversion of the received number, and an extension number table registering the extension telephone in association with an extension number of the extension telephone, and a main controller connected to the connection interface and the database,

• the program causing a computer configuring the main controller to execute:
• setting in advance whether the dial-in conversion table is used or the extension number table is used when the dial-in incoming call comes;
• in the case where the use of the extension number table is set in advance, retrieving an extension number coinciding with the received number from the extension number table when a dial-in incoming call comes from the communication line;
• and
• causing an extension telephone corresponding to the extension number to ring when there is an extension number coinciding with the received number.