PURPOSE: To call only a called party desired by a caller directly by providing an incoming tone generating circuit generating a voice signal by called party name for calling the called party and plural kinds of incoming tone signals different in tone color selectively to either a telephone set or a master set.

CONSTITUTION: When a set of numbers comprising 4-digit telephone number wxyz and 1-digit incoming tone constitution number (k) is received, a control signal is sent to a microprocessor 9 of a telephone set to be connected to form a signal path from a voice synthesis circuit 19 to a speaker 6, then information of a voice signal to a user to be called or information of a ringer tone is read from an incoming tone information memory 18, it is converted into a continuous signal for calling by the voice synthesis circuit 19 and fed to a telephone set side through the said path and the signal is outputted from the speaker 6. Thus, only the called party desired by the caller is called directly without passing through the 3rd party.