JPS6464491A - System for calling extension telephone set - Google Patents

Abstract

PURPOSE:To call the telephone set of storing position information previously stored and to save the dial operation of an extension number, by disposing a button on the telephone set of an automatic private branch exchange, storing the storing position information of the extension of a transmission side by depressing the button by the extension of an incoming side and depressing the button again. CONSTITUTION:When an extension telephone set 2 having the button is connected to the main switch 1 of the automatic private branch exchange through a subscriber's circuit 3 and a calling is executed by the telephone set 4 connected to this telephone set 2 through a subscriber's line 5, the operator of the telephone set 2 responds. A mutual calling is executed by the telephone sets 2, 4 and when it is required to call the operator of the telephone set 4 by the operator of the telephone set 2 after some time, at the time of depressing the button attached to the telephone set 2 by the operator of the telephone set 2, a central controller 6 stores the storing position information of the telephone set 4 in a storage device 7. Then, at the time of calling the telephone set 4 by the operator of the telephone set 2 after some time, the button is depressed to automatically call the position information of the stored telephone set 4.