CN202424829U

CN202424829U - Interlocking device for multiple telephones

Info

Publication number: CN202424829U
Application number: CN201220029299XU
Authority: CN
Inventors: 王寅寅; 何林
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-01-29
Filing date: 2012-01-29
Publication date: 2012-09-05
Anticipated expiration: 2022-01-29

Abstract

The utility model belongs to the technical field of electronic technique and telephone communication and relates to an interlocking device for multiple telephones. The interlocking device for the multiple telephones comprises a telephone line, a telephone line polarity switching circuit, a telephone A, a voltage stabilizing circuit, an off-hook interlocking circuit, an off-hook state indicating circuit. Whether making telephone calls or answering the telephone, the interlocking device for the multiple telephones ensures that an earlier off-hook person has conversion rights and a later off-hook person can not make telephone calls or answer the telephone, thereby the secret conversion is realized, and the problems such as monitoring and the improper working of the telephone line are effectively avoided. The interlocking device feeds by using the voltage of the telephone line without needing the addition of any control connecting line; and the interlocking device has the characteristics that the negative pole and the positive pole of the telephone line do not need to be distinguished when the telephone line is connected, a large number of telephones are connected in parallel, and in work, the interlocking device has no influence on the telephone line and the like.

Description

Multi-section telephone set interlock

Technical field

The utility model belongs to electronic technology and telephonic communication technical field, relates to a kind of multi-section telephone set interlock.

Background technology

Many units or family are easy to use for telephone set, on same telephone line the parallel connection two ones or multi-section telephone set.Because what generally adopt is simple parallel way, thus the serious problems of existing, as: when you were using telephone set conversation wherein, others can hear the sound that you converse on another telephone set; When parallel connection on same telephone line during 3 above telephone sets, the time regular meeting find the telephone line cisco unity malfunction.

In order to solve the variety of problems that parallelly connected multi-section telephone set exists on same telephone line; The described multi-section telephone set of present embodiment interlock; Realize no matter calling or receive calls, guarantee that first off-hook person just has floor, back off-hook person can not dial, can not receive calls; Realize secret telephony, prevented problems such as monitoring, telephone line cisco unity malfunction effectively.Interlock utilizes the voltage of telephone line to carry out feed, need not to increase any control line, and interlock has that the telephone set quantity that needn't distinguish both positive and negative polarity when answering the call circuit and connect is many, when work be to characteristics such as telephone line have no effect.

Below specify multi-section telephone set interlock related relevant technologies content in manufacturing process.

The utility model content

Goal of the invention and beneficial effect: the described multi-section telephone set of present embodiment interlock; Realize no matter calling or receive calls; Guarantee that first off-hook person just has floor; Back off-hook person can not dial, can not receive calls, and has realized secret telephony, has prevented problems such as monitoring, telephone line cisco unity malfunction effectively.Interlock utilizes the voltage of telephone line to carry out feed, need not to increase any control line, and interlock has that the telephone set quantity that needn't distinguish both positive and negative polarity when answering the call circuit and connect is many, when work be to characteristics such as telephone line have no effect.

The operation principle of circuit: form the telephone line polarity switching by 4 rectifier diode D1～D4, make and to divide both positive and negative polarity when answering the call outside line.When each extension set hanging wire standby, telephone line is equivalent to direct current interruption, and promptly unidirectional controllable silicon S CR is in cut-off state.When the phone incoming call, circuit ringing-current voltage breakdown voltage stabilizing didoe DW, and trigger unidirectional controllable silicon S CR through resistance R 2 and make it conducting, ringing telephone stations.Suppose telephone set first elder generation off-hook, then be made up of the DC channel of unidirectional controllable silicon S CR the telephone set first, unidirectional controllable silicon S CR keeps conducting state always, and LED is lighted simultaneously, the indication off hook state.Behind the telephone set first off-hook, voltage drops to about 10V by 50V between telephone line terminal L1, the L2, and the one-way SCR of other extension can't be breakdown because of voltage stabilizing didoe, thus keep cut-off state, thereby other extension set off-hook also can't be dialed or received calls.Its operation principle was identical when other each extension was called, the unidirectional controllable silicon S CR elder generation conducting that the telephone set of first off-hook is corresponding, and telephone line is used in preemption, makes other extension all be in the state of being locked simultaneously.Only draw in the accompanying drawing 1 circuit of two parts machine can be by so connecing method and connecing the multi-section extension during actual the use.

Technical scheme: multi-section telephone set interlock, form by telephone line, telephone line polarity switching, telephone set first, voltage stabilizing circuit, off-hook interlock circuit, off hook state indicating circuit, it is characterized in that:

Telephone line polarity switching: adopt 4 silicon rectifier diode D1～D4 to constitute full bridge rectifier; One termination telephone line terminal L1 of full bridge rectifier input; Line terminal L2 answers the call after the other end chained calls machine first of full bridge rectifier input; The positive pole of full bridge rectifier output links to each other with circuit anode VCC, the negative pole connection circuit ground GND of full bridge rectifier output;

Off-hook interlock circuit: form by voltage stabilizing didoe DW, resistance R 2, resistance R 1, unidirectional controllable silicon S CR and electrochemical capacitor C1; The two ends of resistance R 2 are attempted by the two ends of voltage stabilizing didoe DW; The anodal VCC of the negative pole connection circuit of voltage stabilizing didoe DW; The end of the anodal connecting resistance R1 of voltage stabilizing didoe DW and the anode of unidirectional controllable silicon S CR; The other end order of resistance R 1 is to the control utmost point of controllable silicon SCR and the positive pole of electrochemical capacitor C1, the negative pole connection circuit ground GND of the negative electrode of unidirectional controllable silicon S CR and electrochemical capacitor C1.

The off hook state indicating circuit: the anodal VCC of connection circuit behind the cathode series resistance R3 of LED, the negative pole of LED connects the positive pole of voltage stabilizing didoe DW.

Description of drawings

Accompanying drawing 1 is the circuit working schematic diagram of multi-section telephone set interlock; Only draw in the accompanying drawing 1 interlock circuit of two telephone sets, that is: telephone set first, telephone set second; The dotted line signal on accompanying drawing 1 right side can be according to the circuit connecting continued access multi-section telephone set of telephone set first.

Embodiment

Implement according to the circuit working schematic diagram of the multi-section telephone set interlock shown in the accompanying drawing 1 and the specification requirement of description of drawings and the following stated components and parts, can realize the utility model.

Components and parts technical parameter and selection

With the used components and parts of the circuit of telephone set first is example:

D1～D4 is a silicon rectifier diode, and model is IN4001, and DW is a voltage stabilizing didoe, and the voltage stabilizing value is 10V;

SCR is an one-way SCR, and operating current and withstand voltage parameter are 1A/400V;

LED is a light-emitting diode, can select ￠ 5 red light emitting diodes for use;

The resistance of resistance R 1 is that the resistance of 10K Ω, resistance R 2 is that the resistance of 220 Ω, resistance R 3 is 430 Ω;

C1 is an electrochemical capacitor, and its parameter is 100 μ F/16V;

The components and parts technical parameter that telephone set second and other each telephone set interlock circuit are used and require the same.

Circuit production main points and circuit debugging

In the circuit of multi-section telephone set interlock; As long as the electronic devices and components performance of selecting for use is intact; And the components and parts annexation in the accompanying drawing 1 is welded to specifications, physical connection line and welding quality through scrutiny correct after, but circuit need not debugged just operate as normal;

When circuit debugging, for using the different telephone switch, voltage stabilizing value 10V that might voltage stabilizing didoe need adjust slightly;

The extension set of multi-section telephone set interlock had better not surpass 5 ones, otherwise might influence the reliability of telephone line work.

Claims

1. a multi-section telephone set interlock is made up of telephone line, telephone line polarity switching, telephone set first, voltage stabilizing circuit, off-hook interlock circuit, off hook state indicating circuit, it is characterized in that:

The telephone line polarity switching adopts 4 silicon rectifier diode D1～D4 to constitute full bridge rectifier; One termination telephone line terminal L1 of full bridge rectifier input; Line terminal L2 answers the call after the other end chained calls machine first of full bridge rectifier input; The positive pole of full bridge rectifier output links to each other with circuit anode VCC, the negative pole connection circuit ground GND of full bridge rectifier output;

The off-hook interlock circuit is made up of voltage stabilizing didoe DW, resistance R 2, resistance R 1, unidirectional controllable silicon S CR and electrochemical capacitor C1; The two ends of resistance R 2 are attempted by the two ends of voltage stabilizing didoe DW; The anodal VCC of the negative pole connection circuit of voltage stabilizing didoe DW; The end of the anodal connecting resistance R1 of voltage stabilizing didoe DW and the anode of unidirectional controllable silicon S CR; The other end order of resistance R 1 is to the control utmost point of controllable silicon SCR and the positive pole of electrochemical capacitor C1, the negative pole connection circuit ground GND of the negative electrode of unidirectional controllable silicon S CR and electrochemical capacitor C1.

2. multi-section telephone set interlock according to claim 1, its characteristic is being: the anodal VCC of connection circuit behind the cathode series resistance R3 of LED in the off hook state indicating circuit, the negative pole of LED connects the positive pole of voltage stabilizing didoe DW.