JPS645254A - Private branch exchange - Google Patents

Abstract

PURPOSE:To automatically redial with the operation of a special number dial at the time reoriginating by sustaining a dial figure to be sent out till the completion of a calling operation, and registering the dial figure according to the redialing registration request special number from a telephone set. CONSTITUTION:When it is dialed from an ordinary telephone set 1, a central control circuit 7 controls a sender circuit 6 and sends out a dialing signal to a station. In this case, all the dial figures are temporarily sustained in a storage device 8. When it is required to redial due to the reasons of a busy line by an opponent, an absence, etc., the special number of a redialing is dialed from the ordinary telephone set 1 upon hooking. The central control circuit 7 controls the storage device 8 to change a storage area from for a temporary storage to for redialing. When the redial special number is dialed at the time of next calling, the above-mentioned connection is executed again and the dial figure same as the previous is automatically sent out from the sender circuit 6 by the control of the central control circuit 7.