Telephone used in a telephone system for transmitting data from an authorized telephone with speech authority to an unauthorized telephone without speech authority

Abstract

An object is to provide a telephone enabling a user of a telephone to readily recognize which telephone user is a source of voice under transmission. This telephonehas a receiverfor receiving telephone information to specify each of an authorized telephone and unauthorized telephones, a display surfacefor displaying predetermined information based on the received telephone information, and a display control partfor specifying a content of the predetermined information, based on the telephone information received by the receiver, and for displaying the content on the display surface. The display control partfixedly displays user information to specify a user of the authorized telephone, in a partial region of the display surface, and displays at least part of user information to specify users of telephones except for the concerned telephoneamong the authorized telephone and unauthorized telephones, in a remaining region except for the partial region of the display surface