CALL TARIFF DISPLAY SYSTEM

PURPOSE:To provide a call tariff display system by which a caller can perform a calling, etc., recognizing the accumulated value of call tariff, etc., by receiving call tariff information, even in a general home telephone set, etc. CONSTITUTION:Before a calling, the charging unit notification signal 500 corresponding to the opposite party telephone number of the dial signal 400 from the calling terminal 1000 of a telephone set, etc., is transmitted from the exchange 2000 on the calling side to the side of the calling terminal 1000. The delivery and receipt of this charging unit notification signal 500 is performed without imparting few disturbances to a calling itself because the delivery and receipt is performed while the exchange 2000 on the calling side calls the opposite party. Thus, the influence on a personal computer, a fax and a high functional terminal due to the delivery and reception of the charging unit notification signal is suppressed as much as possible, and the display of call tariff, etc., is enabled even in a general home telephone set, etc. On the side of the calling terminal 1000, call tariff or call rate is calculated from the charging unit notification signal 500 and the calling time count information on the side of the calling terminal 1000, it is displayed on a display by real time and it is presented to a caller.