To make possible to transfer a call a plurality of times by preventing the speech channel in an exchange from being used uselessly at the time of transferring a call and lessening burden on the line at the time of transferring a call.

The exchange comprises a means for receiving hold information being delivered according to operation of a second terminal during telephone conversation of a first terminal with the second terminal through the exchange, a means for receiving transfer information of a call to a third terminal being connected through an exchange from the second terminal when telephone conversation between the first and second terminals is suspended, a speech channel reconfiguration means performing line connection to the third terminal based on the transfer information, and a means for disconnecting line connection to the first and second terminals following to line connection to the first and third terminals.