Patent ID: 7864934

Claim:
A telephone in a telephone system for transmitting voice data transmitted from an authorized telephone with speech authority granted from a speech authority controller, to a plurality of unauthorized telephones without speech authority, comprising: a transmitting unit to request authorization and un-authorization from the speech authority controller to transmit voice data, the speech authority controller, in response to an authorization request from a requesting telephone, authorizing the requesting telephone and un-authorizing all telephones other than the requesting telephone; receiving means for receiving telephone information to specify users of each of the authorized telephone and the unauthorized telephones from the speech authority controller; a display surface for displaying predetermined information based on the received telephone information; and display controlling means for specifying a content of the predetermined information, based on the telephone information received by the receiving means, and for displaying the content on the display surface, wherein the display controlling means fixedly 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 telephone among the authorized telephone and the unauthorized telephones, in a remaining region except for the partial region of the display surface.