PURPOSE: To allow the operator to recognize surely the establishment of end of dial key operation by transmitting the corresponding sound at each dial key operation at dialing and transmitting continuously the corresponding sound to a dial number stored at the establishment of condition of the end of set dial key operation.

CONSTITUTION: A control circuit 11 provided with a microprocessor performs control operation according to a prescribed program, a bell circuit 12 is connected to a trunk line terminal L via a hook switch HS1 at hook-on and informs incoming call. The hook switch HS1 is changed over to the position of a talking circuit 13 and the handset 14 and the talking is attained at hook-off. A dial signal is transmitted from a dial transmission circuit 16 via the control circuit 11 by operating a dial key 15 at transmission, and a specific sound corresponding to the dial number is transmitted from a scale generating circuit 17 and a speaker 19 via an amplifier 18 at each dial key operation. The dial number is stored in a read/write memory 21 at the same time and the sound corresponding to the stored number is generated continuously at the establishment of condition at the end of dial key operation.