JPH024342U

JPH024342U -

Info

Publication number: JPH024342U
Application number: JP8090588U
Authority: JP
Priority date: 1988-06-17
Filing date: 1988-06-17
Publication date: 1990-01-11

Description

[Brief explanation of drawings]

第１図は本考案になる電話用付加装置の一実施
例を示す構成図、第２図Ａは着呼信号を示す波形
図、同図Ｂ〜Ｆは第１の制御手段の各点における
波形図、第３図は第１の制御手段の要部の構成図
、第４図は無線電話と有線電話とからなる一般的
な電話システムの構成図である。１……電話回線、２……無線電話、３……有線
電話、１０……回線側端子、１１……電話側端子
、１２……切り換えスイツチ、１３……着呼信号
検出部、１４……計測部、１５……ループ検出部
、１６……オアゲート、ＣＰ，ＣＰ_１，ＣＰ_２…
…接続制御信号。 FIG. 1 is a block diagram showing an embodiment of the telephone additional device according to the present invention, FIG. 2A is a waveform diagram showing an incoming call signal, and B to F are waveforms at each point of the first control means. 3 are block diagrams of the main parts of the first control means, and FIG. 4 is a block diagram of a general telephone system consisting of a wireless telephone and a wired telephone. DESCRIPTION OF SYMBOLS 1... Telephone line, 2... Wireless telephone, 3... Wired telephone, 10... Line side terminal, 11... Telephone side terminal, 12... Changeover switch, 13... Incoming call signal detection unit, 14... Measuring unit, 15...Loop detection unit, 16...OR gate, CP, _CP1 , _CP2 ...
...Connection control signal.

Claims

[Claims for Utility Model Registration] (1) An additional device for a telephone in a telephone system in which a first telephone and a second telephone are connected in parallel to a telephone line, the telephone line and the second telephone being connected in parallel. a switching means that is interposed between the telephone line and connects the two in response to a connection control signal while always keeping the two in a disconnected state; and when the incoming call signal from the telephone line continues for a predetermined period of time; a first control means for sending a connection control signal to the switching means; detecting an off-hook state of the second telephone;
a second transmitting a connection control signal to the switching means;
An additional device for a telephone, comprising a control means. (2) A telephone device comprising the additional telephone device according to claim 1.