CN1067346A - Transfer device for colinear telephone sets for calling and speaking to each other - Google Patents

Abstract

The invention discloses a kind of transfer device for colinear telephone sets for calling and speaking to each other.This transducer is without external power supply, can produce bell signal, can on a telephone wire, connect two parts machine and between extension set, cry and conversion mutually, and can realize conversing between two extension sets, whether extension set two can set when the outside line incoming call jingle bell arbitrarily, but do not limit reply, exhalation and Internal call, have function of keeping secret when folk prescription and outside line conversation.Positive correspondent can be connected ring generator and call out the opposing party.Can realize Three-Way Calling with outside line behind callee's off-hook, this phone is cut off automatically after any extension set on-hook.Only need two lines between this transducer and the extension set.

Description

Transfer device for colinear telephone sets for calling and speaking to each other

The present invention relates to a kind of conversion equipment that on a telephone wire, connects two telephone sets (A and B).

The phone transducer of selling now on the market, having some products to catch as a side behind the phone of incoming call as discovery is to be the opposing party, can not produce bell signal and call out the opposing party, particularly ought can make troubles to both sides under the situation of two extension set apart from each others.Other products that can call out mutually then must and each extension set between increase by two connecting lines, wasted many one times telephone wire, what this gave circuit again simultaneously brings some troubles by dress and maintenance, will be more obvious when two extension set apart from each others.And most like products can not between two extension sets, realize the conversation or with the outside line Three-Way Calling.

The present invention has overcome the deficiency of existing product, and a kind of transducer is provided, and has increased function.

The characteristics of this transducer are must not insert power supply in addition and realize crying, conversing mutually between two phones.And folk prescription can not be subjected to the opposing party's eavesdropping and interference when conversing with the external world, but after correspondent is called out the opposing party and callee's off-hook, can realize that the three parts converses simultaneously.Also can after the calling party on-hook, converse separately, be cut off automatically after the calling party on-hook by callee and outside line.Each extension set can be set when the outside line incoming call whether ring arbitrarily, but do not limit reply, bell call between exhalation and the extension set.Connecting line between this transducer and any phone is two, can easily substitute original transducer.

The present invention adopts following method to realize: circuitry such as accompanying drawing.Form by ringing signal generator, the relay circuit that switches bell signal, logic control part and corresponding crystal pipe switch.Ringing current generator constitutes oscillator by IC1:A and IC1:B, the CP input of d type flip flop IC2:A is delivered in output, the signal that takes out from the IC2:A output obtains the required oscillator signal of ring through not gate IC1:E and the anti-phase rear drive of IC1:F boost the VMOS pipe TR4 and the TR5 of part at transformer secondary output; IC1:C and IC1:D constitute the R end and S end of about 4 seconds oscillator control IC 2:A of cycle, make IC2:A be in intermittent duty, with the bell signal that generates interrupted oscillation.D type flip flop IC2:B is used for control and whether allows the places in circuit conversation simultaneously of two extension sets.When the Q end of IC2:B is " 0 ", only allow an extension set and external world's conversation, behind a party call the opposing party, the Q of IC2:B holds by set, spares this moment and is permitted to converse between two extension sets or converse with the external world simultaneously.Calling is the variation of its phone short circuit several seconds by this transducer electric current in one end identification phone A or phone B branch road to be realized with a key switch (resistance below one 100 ohm of can connecting) the calling party, has solved the problem that transmits call information under the situation that does not increase connecting line.The call trigger circuit of phone A is made up of R9, TR19, the call trigger circuit of phone B is made up of R10, TR18, when TR12 is used for working in B side with A side and the circuits for triggering blocking-up, TR13 then is used for when the A square tube is talked about B side and circuits for triggering blocking-up thereof, avoids when side dialing or conversation the opposing party's off-hook or press triggering key and aligning and dial or correspondent causes interference.

The power supply of this transducer when work institute palpus is taken from telephone exchange, without external power supply, because the power that the exchange function provides is limited, therefore the oscillating part of logic control part and ringing current generator adopts the CMOS integrated circuit to lower the power consumption of this part when working, and guarantees other part operate as normal.When the work of the other parts of this transducer, taked relative measures to reduce electrical source consumption equally, adopted two VMOS pipe TR3 and TR4 positive and negative two half cycle alternations in the part of boosting of ringing current generator, to improve the power utilization rate in output; The access of IC1:E and two not gates of IC1:F has guaranteed that TR3 and TR4 are in cut-off state when resting stage of ring and ringing signal generator quit work; Ringing-current switches with relay and is concatenated in the phone loop by its whether adhesive of the transistor controls that is connected in parallel on its two ends, and then other parts can't operate as normal because power consumption is more as independent formation relay circuit.

The present invention is further elaborated below with reference to accompanying drawing:

With reference to accompanying drawing, phone A is connected between A and the A ', phone B is connected between B and the B ', phone A and B be not during off-hook, A ' and B ' terminal potential approach 0V in the circuit, and VMOS manages TR2 grid no-bias and turn-offs, thereby TR1 is turn-offed, the power supply of circuit is closed, and each transistor switch is in off state.During the phone incoming call, the bell signal that switch is sent here flows through phone A through C13 respectively; Flow through phone B through C14, after S1 disconnects, bell signal will no longer make phone A ring after by diode D3, after same S2 disconnects, because the effect of D4, phone B is with not re-ringing, by switch S 1 and S2, can set any one extension set jingle bell whether when the outside line incoming call separately, but reply and breathe out all unaffected.Suppose at first off-hook of phone A when incoming call, phone B off-hook again can not converse.Cause behind the phone A side off-hook that circuit state takes place by following the variation: A ' terminal voltage raises, and electric current provides grid voltage to make its conducting by R1, D1 and R11 to TR2, is directed at the TR1 conducting, and the each several part circuit powers up starts working.Voltage stabilizing didoe ZD1 is used for the operating voltage of stable logic control and vibration each several part.After circuit powers up, be provided with capacitor C 5 and make the Q end of IC2:B by reset; TR6, TR5 and TR15 end; The TR10 conducting makes the blocking of oscillator in the ring generator.Simultaneously, the TR11 conducting, the electric current that flows through phone A produces voltage on R31 makes the TR8 conducting, this moment, two inputs of NOR gate IC3:A were " 0 " entirely, and its output is " 1 ", to making the TR13 conducting, TR14 is in off state, even this moment, phone B off-hook can not be conversed.Because TR14 turn-offs, on R32, there is not voltage to TR9 is ended, the input section of IC3:B is a high level, and it is output as low level, and TR12 ends, and guarantees that the TR11 and the call trigger circuit of A side's one side is open-minded.Know that B side answers the call if come round in A side, press AN1 with A with disconnect after A ' is connected the several seconds, electric current increases to R9 and goes up voltage and make the TR19 conducting in this moment phone A circuit, triggering makes it open-minded by the electronic switch that TR6 and TR5 form, TR15 conducting then, TR10 ends, and ringing circuit is started working; Because TR15 conducting, make D10 and D11 conducting and transistor T R16 and TR17 are ended, make relay J 1 and J2 place in circuit, phone B not before the off-hook in the phone B circuit no direct current pass through, relay J 2 is failure to actuate, and have only J1 adhesive in the phone A circuit, the contact action of J1 adds to phone B branch road, phone B jingle bell with the bell signal that this machine produces.The conducting of TR5 triggers IC2:B again and makes its Q end set, the high level of Q end adds to the input of input of IC3:A and IC3:B simultaneously, make the output of IC3:A and IC3:B be low level simultaneously, TR12, TR13 ends simultaneously, allow the TR14 conducting that phone B place in circuit is conversed this moment, behind phone B off-hook, the TR14 conducting produces voltage on R32, make the TR9 conducting, this moment, two inputs of IC3:C were low entirely, and it is output as height and makes the TR7 conducting, thereby makes TR6, the electronic switch that TR5 forms disconnects, TR15 is ended, ring generator is turn-offed in the TR10 conducting, and TR15 will be by will also being directed at the conducting of TR16 and TR17, and relay J 1 discharges.So far, outside line, phone A and phone B can realize Three-Way Calling.Any extension set such as on-hook this moment, IC3:C exports by high step-down, and this electronegative potential is cut off after this extension set on-hook automatically through the Q end reset of the anti-phase after C5 of IC3:D with IC2:B.As phone A on-hook, though after this A side again off-hook also can't hear the talk of B side.The conversation power that this transducer is distributed to two extension sets equates, same variation takes place the corresponding partial status of components and parts that changes during with above-mentioned A side elder generation off-hook in the circuit when outside line incoming call B side elder generation off-hook.

This converter is compared with existing product, the chief who collects each, need not connect in addition power supply and not be used in converter and extension set between increase in the situation of connecting line, accomplished that extension set and outside line conversation possesses function of keeping secret, adopt ring to call out mutually, arbitrarily change between extension set and the extension set, can set separately whether jingle bell of arbitrary extension set during the outside line incoming call, not affect replying and breathing out of each extension set simultaneously, bring great convenience using to install to the user with circuit.

Claims (8)

1, a transfer device for colinear telephone sets for calling and speaking to each other is characterized in that being made up of the relay and the control circuit thereof of a plurality of transistors or fet switch, ring generator and circuits for triggering thereof, logic control circuit and switching bell signal.

2, transducer according to claim 1 is with main dialing telephone and connect a resistance or of short duration main dialing telephone direct short-circuit is realized that the caller extension set starts the ring generator of this transducer to call out the opposing party when it is characterized in that between the extension set calling out by of short duration.

3, according to claim 2, electric current makes TR8 conducting after-current produce pressure drop on R9 in the voltage drop that produces on the R31 and makes the TR19 conducting when it is characterized in that the A party call; The voltage drop that electric current produces at R32 during the B party call makes TR9 conducting after-current produce pressure drop on R10 and makes the TR18 conducting; Therefore trigger the self-locking electronic switch of forming by TR6 and TR5, the triggering signal that adopts TR12, TR13 to block non-correspondent and come from non-correspondent.

4, transducer according to claim 1 is characterized in that the relay coil that switches bell signal is serially connected in the branch machine circuit, and controls its adhesive and release by transistor (or the VMOS field effect transistor) switch that is connected in parallel on the relay.

5, according to claim 4, the transistor switch that it is characterized in that being connected in parallel on the relay is controlled by the electronic switch that TR15 is formed by TR6 and TR5.

6, transducer according to claim 1 is characterized in that TR11 and TR14 respectively as the switch of phone A and phone B branch road, are subjected to logic control circuit to control its break-make by TR12 and TR13 respectively.

7, transducer according to claim 1 is characterized in that diode D3 and D4 are serially connected in respectively in phone A and the phone B branch road, and capacitor C 13 and C14 are connected in parallel on D3 and D4 two ends after being connected in series switch S 1 and S2 respectively.

8, transducer according to claim 1 is characterized in that the used power supply of the whole circuit workings of this transducer takes from telephone exchange, by VMOS pipe switch TR1 control break-make.

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