CN2153186Y

CN2153186Y - Crosstalk-preventing protector for non-cord telephone

Info

Publication number: CN2153186Y
Application number: CN 93202123
Authority: CN
Inventors: 罗鸿章
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-01-20
Filing date: 1993-01-20
Publication date: 1994-01-12
Anticipated expiration: 2003-01-20

Abstract

The utility model provides a crosstalk-preventing protector for cordless telephones. The utility model is mainly composed of a ringing which mainly comprises a ringing testing circuit, an off hook testing circuit and a time delay switch circuit. The protector can effectively prevent co-channel cordless telephones from the situation of mis-crosstalk or intentional crosstalk, can avoid economic loss of users and jam of telephone channels, and is suitable for the cordless telephones of any types.

Description

Crosstalk-preventing protector for non-cord telephone

The utility model relates to a kind of crosstalk-preventing protector of cordless telephone.

Existing cordless telephone in use has such deficiency, is assigned the multi-section cordless telephone because of a communication channel that is:.Thereby, very easily occur the mistake string between the co-channel (adjective) cordless telephone and had a mind to go here and there with make a phone call (mainly being long-distance) by other people.This not only causes economic loss to the user, and has blocked user's the talking path of coming.

The purpose of this utility model is that existing deficiency proposes in using according to existing cordless telephone a kind ofly prevents that mistake between the co-channel (adjective) cordless telephone from going here and there or have a mind to go here and there the cordless telephone crosstalk-preventing protector of usefulness.

Can realize the purpose of this utility model by following scheme.A kind of cordless telephone crosstalk-preventing protector is characterized in that, it by ring detecting circuit, get machine testing circuit and delay switch circuit and form through connecting.

Ring detecting circuit is connected and is formed by optical coupler, two diodes, common triode and two resistance.

Delay switch circuit is connected by time base integrated package NE555, relay, relay switch, hand switch, transformer, resistance and two electric capacity and forms.

Operation principle of the present utility model is: this protector is closed cordless telephone base power supply at ordinary times; when the incoming call ring; ring detecting circuit detects signal and drives the relay switch closure by delay switch circuit; connect power supply for wireless PBX; base is to handset call; mobile phone is replied, and this moment, bell signal disappeared, and gets the machine testing electric circuit inspection and goes out to get the machine signal and make relay continue to inhale moving to keep the base working power by delay switch circuit.After words finish on-hook, relay time-delay 3-5 minute (time-delay length can artificially be set), at this moment, can be for mobile phone toward out-going call.But the mobile phone hand switch in the make delay switching circuit of dialing is connected the base power supply at ordinary times, can transfer to.Because cordless telephone and working power are not in closed condition when having incoming call and user outwards not to make a phone call, so can prevent other people co-channel cordless telephone chance error string or have a mind to string with making a phone call.

The utility model has the advantages that to have prevented to miss between the co-channel cordless telephone situation appearance of going here and there or having a mind to go here and there usefulness effectively, avoided the obstruction of economic loss of user and communication line.

Below in conjunction with embodiment of the present utility model and accompanying drawing the utility model is further set forth.

Telephone wire contact 1 connects ring detecting circuit, and ring detecting circuit is connected and formed by optical coupler 2, diode 3, resistance 4, resistance 5, capacitor 6, diode bridge rectifier 7.Ring detecting circuit with get the machine testing circuit and connect.Getting the machine testing circuit is connected and is formed by optical coupler 8, resistance 9, resistance 10, diode 11, diode 12, triode 13.Getting the machine testing circuit connects with delay switch circuit, delay switch circuit is connected by time base integrated package (NE555) 14, resistance 15, resistance 16, electric capacity 17, electric capacity 18, relay 19, diode bridge rectifier 20, transformer 21, hand switch 22 and relay switch 23 and forms power input plug 24 and power output end 25(joint chair machine) be located in the delay switch circuit.

Claims

1, a kind of cordless telephone crosstalk-preventing protector is characterized in that by ring detecting circuit, gets machine testing circuit and delay switch circuit and form through connecting.

2,, it is characterized in that ring detecting circuit is connected by optical coupler, diode, diode bridge rectifier, two resistance and electric capacity and forms by the described cordless telephone crosstalk-preventing of claim 1 protector.

3, by the described cordless telephone crosstalk-preventing of claim 1 protector, it is characterized in that, get the machine testing circuit and connect and form by optical coupler, two diodes, common triode and two resistance.

4, by the described cordless telephone crosstalk-preventing of claim 1 protector, it is characterized in that, delay switch circuit by the time base integrated package (NE555), relay, relay switch, hand switch, transformer, resistance and two electric capacity connect and form.