JPH0157839U

JPH0157839U -

Info

Publication number: JPH0157839U
Application number: JP1987152302U
Authority: JP
Priority date: 1987-10-05
Filing date: 1987-10-05
Publication date: 1989-04-11
Also published as: JPH0448029Y2

Description

[Brief explanation of the drawing]

第１図は本考案の無線電話機の一実施例での子
機を示す構成図、第２図は本考案の無線電話機の
一実施例での親機を示す構成図である。主な図番の説明、１１……パイロツト信号発生
回路、１４……子機ミユート回路、１５……保留
スイツチ、１６……保留動作信号発生回路、１７
……待機信号検出回路、３６……保留動作信号検
出回路、３７……親機ミユート回路、３８……保
留音声信号発生回路、３９……パイロツト信号検
出回路、４０……電話回線電圧検出回路。 FIG. 1 is a block diagram showing a handset in an embodiment of the radio telephone of the present invention, and FIG. 2 is a block diagram showing a base unit in an embodiment of the radio telephone of the present invention. Explanation of main drawing numbers, 11...Pilot signal generation circuit, 14...Slave unit mute circuit, 15...Hold switch, 16...Hold operation signal generation circuit, 17
... Standby signal detection circuit, 36 ... Hold operation signal detection circuit, 37 ... Base unit mute circuit, 38 ... Hold voice signal generation circuit, 39 ... Pilot signal detection circuit, 40 ... Telephone line voltage detection circuit.

Claims

[Scope of utility model registration request]

It is equipped with a pilot signal detection circuit that closes the base switch while detecting a pilot signal transmitted from the handset, and connects the base unit, which communicates with the handset by radio, to one telephone line with other telephones. In wireless telephones connected in parallel,
The handset includes a hold switch, a hold operation signal generation circuit that generates a hold operation signal when the hold switch is operated, and a standby signal detection circuit that detects the standby signal and puts the handset into a standby state in which it only performs a receiving operation. a hold operation signal detection circuit that detects the hold operation signal in the base unit, and a hold voice signal generation circuit that becomes activated by the detection output of the hold operation signal detection circuit and sends the hold voice signal to the telephone line. The telephone line voltage detection circuit detects a drop in the telephone line voltage due to the hook operation of the telephone, and the telephone line voltage detection circuit enters the operating state by the detection output of the holding operation signal detection circuit. and a standby signal generation circuit that generates the standby signal, and when the telephone goes off-hook during a transfer operation to the telephone, the telephone line voltage detection circuit detects a drop in the telephone line voltage and generates the standby signal. The circuit becomes operational and transmits a standby signal to the handset, which is detected by the standby signal detection circuit of the handset, causing the handset to enter the standby state and stop transmitting the pilot signal. , A wireless telephone characterized in that a switch on the base unit is opened.