CN1022725C

CN1022725C - Transfer device for colinear telephone sets for calling and speaking to each other

Info

Publication number: CN1022725C
Application number: CN 92101088
Authority: CN
Inventors: 李晓更
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-02-26
Filing date: 1992-02-26
Publication date: 1993-11-10
Anticipated expiration: 2007-02-26
Also published as: CN1067346A

Abstract

The present invention discloses a multi-function converter for extension telephones capable of calling and speaking to each other. The converter can generate ringing signals without using an external power supply, and two extension telephones can be connected to one telephone line; the converter can realize mutual calling and conversion between the two extension telephones and can also realize conversation between the extension telephones. The two extension telephones can optionally set whether ring is made during the time of external line calling without limiting answering, external calling and internal calling, and the present invention has the function keeping secret during a single telephone is used for talking with an external line. A telephone used for talking can switch on a ringer oscillator to call the other telephone, and three-party talking with the external line can be realized after the called telephone is in an off-hook state; a telephone is automatically switched off when any extension telephone is hung up. Only two connecting lines are needed between the converter and extension telephones.

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).

Got permission the phone transducer of patent, having some products to catch as a side behind the phone of incoming call as finding 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 telephone set apart from each others.Other products that can call out mutually then need to increase by two connecting lines between each telephone set, have wasted many one times telephone wire, and this brings some troubles for again the I﹠M of circuit simultaneously, will be more obvious when two telephone set apart from each others.And most like products can not between two telephone sets, realize the conversation or with the outside line Three-Way Calling.

Provide a kind of multi-purpose two party telephone Call Transfer device of realization on the basis that need not connect power supply in addition that is used for the phone communication system order of the present invention.

The present invention is achieved in that it is in parallel with A branch road telephone set 3 by A branch road call button 5, the A branch road outside line incoming call ring restricting circuits 1 of one end of telephone set 3 by series connection with it is connected to L+ and is connected to outside line, the other end of telephone set 3 is connected to A branch road electronic switch 9 after by the relay coil in the series connection B phone ringing-current switch 7, the other end of A branch road electronic switch 9 is connected to A branch road sample circuit 11, and the other end of A branch road sample circuit 11 is connected to L-and is connected to outside line; Simultaneously in parallel with B branch road telephone set 4 by B branch road call button 6, the B branch road outside line incoming call ring restricting circuits 2 of one end of telephone set 4 by series connection with it is connected to L+ and is connected to outside line, the other end of telephone set 4 is connected to B branch road electronic switch 10 after by the relay coil in the series connection A phone ringing-current switch 8, the other end of B branch road electronic switch 10 is connected to B branch road sample circuit 12, and the other end of B branch road sample circuit 12 is connected to L-and is connected to outside line; Simultaneously by ringing signal generator and control section power electronic switch 13 power supply is connected to ringing signal generator 14 and logic control part 15 by L+, the bell signal of ringing signal generator 14 outputs is connected to each phone ringing-

current switch

7 and 8, the output of

sample circuit

11,12 is connected to logic control part 15, the output of logic control part 15 be connected to respectively each branch road

electronic switch

9 and 10, each branch road ringing-

current switch

7 and 8 and the control end of ringing signal generator 14 form.

The characteristics of this transducer are not need to insert power supply in addition and realize crying, conversing mutually between two telephone sets.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.Talk when not wanting to allow user A eavesdropping as user A permanent and user B after user B is given in the outside line calling, user B can notify user A on-hook after the calling of replying user A, though after the telephone set of oneself hung up after the several seconds off-hook again wait for, as the user A this moment of on-hook not yet, before user A on-hook, user B will can't hear any sound, can be sure of user A on-hook after user B hears the outside line speech.This is that conversation power just can be handed to user B after user A on-hook because the logic control part in this device will be given user A conversation power once more after the of short duration on-hook of user B.Though user B can not initiatively be hung up the telephone set of user A behind off-hook, can at any time check the phone of coming and whether be eavesdropped by another user's switching with off-hook after the on-hook several seconds, whether continue conversation with decision.Each telephone set can be when switch S 1 or S2 being set deciding it to work as the outside line incoming call whether ring, but do not limit reply, breathe out and two telephone sets between bell call.Connecting line between this transducer and any one telephone set is two, can easily substitute original transducer.

Accompanying drawing 1 is block diagram of the present invention.

Accompanying drawing 2 is circuit diagram of the present invention.

In the physical circuit figure of the apparatus of the present invention shown in the accompanying drawing 2, ticked corresponding units in the accompanying drawing 1 with dashed line form, and be marked with accompanying drawing 1 in the identical label of corresponding units.Wherein the outside line incoming call ring restricting circuits 1 of telephone set A is made up of diode D3, switch S 1, capacitor C 13, the outside line incoming call ring restricting circuits 2 of telephone set B is made up of diode D4, switch S 2, capacitor C 14, is used for limiting respectively each branch road telephone set outside line incoming call ring and uses.Each branch road telephone set 3 and 4 is general push-button telephone.The call button 5 of user A is made up of button AN1, resistance R 7; The call button 6 of user B is made up of button AN2, resistance R 8, is used for call peer respectively to use.The B phone ringing-current switch 7 that user A calling party B uses is made up of transistor T R16, resistance R 35, the diode D10 of the relay J 1 that is used as switch, control J1 adhesive, and the A phone ringing-current switch 8 that user B calling party A uses is made up of transistor T R17, resistance R 36, the diode D11 of the relay J 2 that is used as switch, control J2 adhesive.The electronic switch 9 of A branch road is used for controlling the break-make of telephone set A, is made up of field effect transistor TR11, resistance R 1, capacitor C 15; The electronic switch 10 of B branch road is used for controlling the break-make of telephone set B, is made up of field effect transistor TR14, resistance R 2, capacitor C 16, plays on-off action respectively in respective branch.The sample circuit 11 of A branch road is formed the operating state that is used for detecting telephone set A by resistance R 31, capacitor C 11, and the sample circuit 12 of B branch road is made up of resistance R 32, capacitor C 12, is used for detecting the operating state of telephone set B.Ringing signal generator and logic control part power electronic switch 13 by field effect transistor TR1, TR2, resistance R 16, R27, R11, R15, diode D5, D1, D2, voltage-stabiliser tube ZD1, capacitor C 8, C2, form, the power supply that is used for when transducer is worked connecting ringing signal generator and logic control part is used.Ringing signal generator 14 is made up of transformer T1, field effect transistor TR3, TR4, CMOS integrated circuit (IC) 1:A, IC1:B, IC1:C, IC1:D, IC1:E, IC1:F, IC2:A, resistance R 21, R22, capacitor C 21, C22, diode D7, D8, is used in and produces bell signal usefulness when calling out.Logic control part 15 is made up of integrated circuit (IC) 2:B, IC3:A, IC3:B, IC3:C, IC3:D, transistor T R5, TR6, TR7, TR8, TR9, TR10, TR12, TR13, TR15, TR18, TR19, resistance R 3, R4, R5, R6, R9, R10, R12, R13, R17, R18, R19, R20, R25, R26, diode D14, capacitor C 1, C3, C4, C5, C6, C7, C9, is used for when transducer is worked completion logic to judge and control.

Ringing signal 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 bell signal 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 phones.When the Q end of IC2:B is " 0 ", only allow a telephone 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 telephone sets or converse with the external world simultaneously.The A branch road challenge switch AN1(sight path length one 100 Ohmic resistance R7 that can connect) be connected in parallel on telephone set A circuit nearby, the B branch road challenge switch AN2(sight path length one 100 Ohmic resistance R8 that can connect) be connected in parallel on telephone set B circuit nearby, calling is at calling party's switch that pushes button the variation of its telephone set short circuit several seconds by this transducer electric current in one end identification telephone set A or telephone set B branch road to be realized, 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 telephone set 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.

Required power supply is taken from telephone exchange during the work of this transducer, 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.Taked relative measures to reduce electrical source consumption equally when the work of the other parts of this transducer, adopted push-pull circuit in the part of boosting of ringing signal generator, TR3 and TR4 are in positive and negative two half cycle alternations of output, to improve conversion efficiency; 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 telephone set loop by its whether adhesive of the transistor controls that is connected in parallel on its two ends, then makes the other parts can't operate as normal owing to 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 2, telephone set A is connected between A and the A ', telephone set B is connected between B and the B ', telephone set 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 telephone set B through C14, after S1 disconnects, bell signal will no longer make telephone set A ring after by diode D3, after same S2 disconnects, because the effect of D4, telephone set B is with not re-ringing, by switch S 1 and S2, can set any one telephone set jingle bell whether when the outside line incoming call separately, but reply and breathe out all unaffected.Suppose at first off-hook of telephone set A when incoming call, telephone set B off-hook again can not converse.Cause behind the telephone set A 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 ringing signal generator.Simultaneously, the TR11 conducting, the electric current that flows through telephone set 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, telephone set 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.If coming round, A side knows that B side answers the call, presses AN1 A and A ' short circuit were disconnected after the several seconds that electric current increases to R9 and goes up voltage and make the TR19 conducting in this moment telephone set 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, telephone set B not before the off-hook in the telephone set B circuit no direct current pass through, relay J 2 is failure to actuate, and have only J1 adhesive in the telephone set A circuit, the contact action of J1 adds to telephone set 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 telephone set B place in circuit is conversed this moment, behind telephone set B off-hook, the TR14 conducting, on R32, produce voltage, 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, ringing signal 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, telephone set A and telephone set B can realize Three-Way Calling.Any one telephone set is as on-hook at this moment, and IC3:C exports by high step-down, and this electronegative potential is cut off after this telephone set on-hook automatically through the Q end reset of the anti-phase after C5 of IC3:D with IC2:B.As telephone set 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 telephone 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 on function, the chief who collects each, need not connect in addition power supply and not be used in converter and phone between increase in the situation of connecting line, accomplished that any one telephone set converses with outside line separately and possess function of keeping secret, can realize conversation between two telephone sets, two telephone sets can be realized Three-Way Calling with outside line. Utilize between two telephone sets that ringing telephone stations is called out mutually, random multiple conversions, can set separately whether jingle bell of any telephone set during the outside line incoming call, while does not affect replying and breathing out of Internal call and each telephone set, installs to the user at use and circuit to bring great convenience.

Claims

1, a kind of two party telephone capable of calling and speaking to each other transducer comprises telephone set A, telephone set B, terminal L+ that is connected with local line and terminal L-, ringing signal generator; It is characterized in that: A branch road call button 5 is in parallel with A branch road telephone set 3, the A branch road outside line incoming call ring restricting circuits 1 of one end of telephone set 3 by series connection with it is connected to L+ and is connected to outside line, the other end of telephone set 3 is connected to A branch road electronic switch 9 after by the relay coil in the series connection B phone ringing-current switch 7, the other end of A branch road electronic switch 9 is connected to A branch road sample circuit 11, and the other end of A branch road sample circuit 11 is connected to L-and is connected to outside line; Simultaneously in parallel with B branch road telephone set 4 by B branch road call button 6, the B branch road outside line incoming call ring restricting circuits 2 of one end of telephone set 4 by series connection with it is connected to L+ and is connected to outside line, the other end of telephone set 4 is connected to B branch road electronic switch 10 after by the relay coil in the series connection A phone ringing-current switch 8, the other end of B branch road electronic switch 10 is connected to B branch road sample circuit 12, and the other end of B branch road sample circuit 12 is connected to L-and is connected to outside line; Simultaneously by ringing signal generator and logic control part power electronic switch 13 power supply is connected to ringing signal generator 14 and logic control part 15 by L+, the bell signal of ringing signal generator 14 outputs is connected to each phone ringing-current switch 7 and 8, be connected to logic control part 15 by sample circuit 11,12 outputs, the output of logic control part 15 be connected to respectively each branch road electronic switch 9 and 10, each branch road ringing-current switch 7 and 8 and the control end of ringing signal generator 14 form; Adopt relay J 1 in the B phone ringing-current switch 7, relay J 1 coil is connected in the A branch road; Adopt relay J 2 in the A phone ringing-current switch 8, relay J 2 coils are connected in the B branch road; The electronic switch 9 of connecting with A branch road telephone set 3 adopts field effect transistor, and the electronic switch 10 of connecting with B branch road telephone set 4 adopts field effect transistor; Each branch road sample circuit 11,12 is connected on respectively in each branch road, and the power supply of ringing signal generator 14 and logic control part 15 is taken from switch, by ringing signal generator and logic control part power electronic switch 13 control break-makes.

2,, it is characterized in that call button is in parallel with the corresponding telephone machine according to the described transducer of claim 1.

3,, it is characterized in that also can connect as one sees fit resistance below one 100 ohm of each call button sight path length according to the described transducer of claim 1.

4, according to the described transducer of claim 1, the sample circuit sampling resistor that it is characterized in that being used for detecting described branch road phone operating state is connected in the described branch road, and voltage adds to the logic control part on it.

5,, it is characterized in that the relay coil in each phone ringing-current switch is connected in the respective electrical phone branch road, and the adhesive of relay is controlled by the transistor switch in parallel with it with release according to the described transducer of claim 1.

6, according to the described transducer of claim 1, it is characterized in that the switch of phone A and B branch road is served as by field effect transistor TR11 and TR14 respectively, its break-make is controlled by logic control circuit respectively again by transistor T R12 and TR13.

7, according to the described transducer of claim 1, it is characterized in that outside line incoming call ring restricting circuits is serially connected in respectively in telephone set A and the telephone set B branch road by diode D3 and D4 forms, and capacitor C 13 and C14 are connected in parallel on diode D3 and D4 two ends after being connected in series switch S 1 and S2 respectively.

8,, it is characterized in that taking from the power supply that is used for each circuit working of telephone exchange, by fet switch TR1 control break-make according to the described transducer of claim 1.