Abstract: Telephone directory data that has been stored in a telephone exchange apparatus is retrieved by a specific extension terminal to select the dial number of a party. When an ordinary extension terminal other than the specific extension terminal calls the specific extension terminal, an outgoing call is generated in the specific extension terminal on an outside line in accordance with the retrieved dial number and the ordinary extension terminal is connected to the outside line based on the dial number. Further, when a cordless telephone accommodated in an extension of the telephone exchange is designated from the specific extension terminal and the specific extension terminal retrieves and selects a dial number, the cordless telephone calls the specific extension terminal so that a call based upon the dial number can be made from the cordless telephone.