Abstract: According to one embodiment, there is provided a telephone system including; a plurality of exchanges interconnecting a plurality of communication terminals through a communication network, each exchange receiving from each communication terminal a connection request including an extension number of each communication terminal, based on authentication processing and including; a management data base where the extension number is correlated with an address information of a prescribed exchange; an acquisition processing unit retrieving the management data base based on the extension number when the connection request is received from the communication terminal and acquiring the address information; and a notification processing unit notifying the communication terminal of the address information of the acquired prescribed exchange.

Abstract: According to one embodiment, there is provided a telephone system including; a plurality of exchanges interconnecting a plurality of communication terminals through a communication network, each exchange receiving from each communication terminal a connection request including an extension number of each communication terminal, based on authentication processing and including; a management data base where the extension number is correlated with an address information of a prescribed exchange; an acquisition processing unit retrieving the management data base based on the extension number when the connection request is received from the communication terminal and acquiring the address information; and a notification processing unit notifying the communication terminal of the address information of the acquired prescribed exchange.

Abstract: According to one embodiment, a telephone exchange apparatus includes a memory which stores a management table in which a terminal ID of the first telephone terminal, the called party's ID, and a terminal ID of the second telephone terminal are associated with one another, when transfer registration is made to transfer the incoming call including the called party's ID to a second telephone terminal after the incoming call reservation key is pressed on the first telephone terminal, and a controller which refers to the management table based on the called party's ID and identifies the terminal ID of the first telephone terminal which is associated with the called party's ID based on a result of the reference, and performs incoming call control on the second telephone terminal which is associated with the terminal ID of the first telephone terminal, when the incoming call including the called party's ID arrives.