JPS6383838U

JPS6383838U -

Info

Publication number: JPS6383838U
Application number: JP1986177740U
Authority: JP
Priority date: 1986-11-19
Filing date: 1986-11-19
Publication date: 1988-06-01

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例に用いた無線電話機
の子機のブロツク図、第２図は本考案の一実施例
に用いた無線電話機の親機のブロツク図である。主な図番の説明、６……ＤＴＭＦ信号発生回路
、１９……ＤＴＭＦ信号検出回路、２０……キー
コード記憶回路、２１……キーコード識別回路、
２２……電話回線閉結回路。 FIG. 1 is a block diagram of a handset of a radio telephone used in an embodiment of the present invention, and FIG. 2 is a block diagram of a base of a radio telephone used in an embodiment of the present invention. Explanation of main drawing numbers, 6...DTMF signal generation circuit, 19...DTMF signal detection circuit, 20...Key code storage circuit, 21...Key code identification circuit,
22...Telephone line closing circuit.

Claims

[Scope of utility model registration request]

A base unit connected to a telephone line, and a slave unit equipped with a DTMF signal generation circuit that makes a wireless telephone call to the base unit and transmits a DTMF signal as a dial signal to the telephone line via the base unit. A DTMF that performs a detection operation of a DTMF signal transmitted from the slave unit to the base unit;
a signal detection circuit; a key code identification circuit for identifying a key code composed of a DTMF signal detected by the detection operation of the DTMF signal detection circuit; and a key code for storing and registering the identification key code of the key code identification circuit. A storage circuit and a telephone line closing circuit for opening and closing a telephone line in response to the identification operation of the key code identification circuit are provided, and a DTMF signal constituting the key code stored and registered in the key code storage circuit is transmitted as a slave. A theft prevention circuit for a wireless telephone, characterized in that a telephone line is closed when a signal is received from the wireless telephone.