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    • 42. 发明专利
    • TELEPHONE SET AND ITS CONTROL METHOD
    • JPH08279843A
    • 1996-10-22
    • JP8268395
    • 1995-04-07
    • CITIZEN WATCH CO LTD
    • SATO NOBUHIRO
    • H04M1/00H04M1/57H04M1/66H04M1/663
    • PURPOSE: To identify a wrong dialing or a harassment call by storing plural specific extension numbers of called parties and callers to a memory. CONSTITUTION: A specific extension number to a telephone set of a called party and an extension number for specific talking to allow talking when the extension number is not dialed are stored in a memory 17. When a caller dials a different extension number in a mistake, since data coincident with the dialed data are not stored in the memory 17, an extension number comparator circuit 19 provides an output of a line control signal 27 to make a telephone line control circuit 25 nonconductive and an output control signal 35 not to control a sounder 21 and a light emitting device 23. Thus, a telephone line 11 is not connected to a communication circuit to disable the communication, the sounder 21 does not generate a call tone, the light emitting device 23 generates no light emission pattern thereby disabling communication of a wrong dialing and a harassment call.