CN2214065Y - Parallel Telephone Logic Adapter - Google Patents

Abstract

A logic adapter for parallel telephone is composed of casing, ringing signal sensitive circuit, logic control unit and switching relay control circuit. The present machine is characterized by that under the combined action of ringing signal sensitive circuit and logic control unit a device capable of making logic judgment on time regularity of ringing signal of telephone set and making logic control of two parallelly-connected machines by means of relay control circuit can be formed, so that the main machine or auxiliary machine can be connected into main circuit of telephone line according to the requirements to implement the goal of directly dialing extension telephone line by means of outside line.

Description

Parallel telephone logical adapter

The utility model belongs to a kind of bridging telephone switching device, be characterized in carrying out logic control to two machines of parallel connection according to the temporal regularity of telephone ring signal, thereby the outside line calling party can realize each extension set of direct dialing by different dial modes.

Along with expanding economy, people are more and more higher to the requirement of communication, and phone has become indispensable agencies of liaison in people's life.In present communication line deficiency, under the situation that phone quantity also can not be met consumers' demand far away, article one, the situation of two telephone sets in parallel is of common occurrence on the telephone wire, do not disturb mutually in order to solve between the bridging telephone, the mutual problem of maintaining secrecy, existing multiple phone connector (or being transducer, deconcentrator) occur on market or have applied for patent.These phone connectors have realized to some extent all making that two machines in parallel are separate, interlocking, maintain secrecy, do not disturb mutually, function such as diverting call.But they have a common characteristic, two machines ring simultaneously when promptly calling, as finding it is not to call out this machine behind a side (as the A machine) off-hook, then or allow the other side make a call to again one time, perhaps must finish operations such as button, on-hook changes, phone is given to the opposing party's (as B machine), and vice versa.In fact these operations necessary have constituted the phase mutual interference.Commercially available " 1 is with 4 " phone connector (as the SMS-4 type) is though can realize the direct dialing in extension set, and complex structure costs an arm and a leg.

The purpose of this utility model will overcome the existing common shortcoming of various phone connectors just, really realizes each extension set of direct dialing in better simply circuit structure, cheap cost.

Technical solution of the present invention is to utilize the interruption regularity of telephone ring signal, its be interrupted regular for ring ring 1 second, disconnected 4 seconds, ring 1 second, broke 4 seconds ... propose a kind of patrolling and seized the control new ideas, the temporal regularity that promptly utilizes bell signal carries out logic control to two machines of parallel connection, thereby has realized the purpose that outside line can be dialed directly each extension set as required.

This machine is by shell, the bell signal sensitive circuit, logic control element and control relay circuit etc. partly constitute, the bell signal sensitive circuit is used for the bell signal on the responsive telephone line, the input of its output termination logic control element, logic control element is judged the temporal regularity of telephone ring signal, its output is succeeded electrical apparatus control circuit, control relay circuit will be controlled transfer relay Jk according to the judged result of logic control element, main frame or secondary machine are inserted the telephone wire major loop, so the outside line caller is convenient can dial directly each extension set by different dial modes.Transfer relay Jk has guaranteed that also any moment has only a telephone set to link to each other with outside line.

Compared with the prior art the utility model has following advantage:

1. guarantee the direct dialing in extension set, avoided the phase mutual interference.

2. do not increase the telephone line load.Guaranteed on this commutator circuit that any moment has only a phone to link to each other with outside line, thereby do not increased the telephone line load.

3. power consumptive province.Adapter is 6 volts of direct current supplys, and quiescent current is less than 1 microampere, fully can be with dry cell power supply (life-span is 3～6 months).

4. cost is low.This machine element is easily purchases electronic devices and components, and the complete machine cost is dozens of yuan only.

Description of drawings:

Accompanying drawing is electrical schematic diagram of the present invention.

Each major part is separated by frame of broken lines among the figure, and 1 is the bell signal sensitive circuit, and 2 is logic control element, and 3 is control relay circuit.

Narrate one embodiment of the present of invention below in conjunction with accompanying drawing:

The annexation of each several part and function are as follows among the figure:

L1, the L2 line two ends of answering the call, C1, R1 and R2 constitute the bell signal sensitive circuit, because of R1, R2 resistance quite big (number megohm), so can ignore to the influence of telephone wire load; Frame of broken lines 2 is the logic control element (detailed after the function) of this machine, the alternating voltage that the AC signalling electric current produces at the P point is as the input signal of this logic control element, A, K are output, control two switch triodes of V1, V2 respectively, that is two relays of Ja, Jk, wherein Ja is a main line break-make relay, and Jk is major and minor machine transfer relay; R9 and V3 constitute and pin the B machine circuit, promptly when the A machine is conversed, and the V3 conducting, C3 point current potential approaches zero, and the B machine can't start; The effect of D4, D5 is to guarantee that V2 has enough base biases, and is unlikely excessive base current.

This machine logic control element (frame of broken lines 2) is by logic gates CD4043(R-S trigger), CD4081(and door), the CD4069(not gate) and formation such as counter CD4060, D1, D2, R5 constitute OR circuit in addition, one of D1(input wherein) is connected to the P point, D2 is connected to the 2nd point of CD4069, and output is connected to the control end (the 12nd point) of counter CD4060; R3, R4 and C2 constitute the RC oscillator, and the pulse input of frequency stabilization is provided for CD4060.

The detailed operation process of this logic control element is as follows:

When ringing current arrives, the alternating voltage that the P point produces is equivalent to import one group of positive pulse signal to logic control element, the 1st positive pulse of this group pulse just triggers into high level with the 2nd of CD4043, with the 2nd CD4081(that links to each other and door) the 5th also correspondingly become high level, and CD4081(and door) the 6th initial condition be high level, so the 4th of output becomes high level, that is output terminals A becomes high level, the V1 conducting, Ja work, meanwhile, with the 2nd CD4069(not gate that links to each other of CD4043) the 1st become high level, the 2nd becomes low level, so after ringing current finishes for the first time, by D1, D2, R5 constitutes or door two inputs are low level, output (being connected to the CD4060 control end) just is low level, counter CD4060 begins the starting of oscillation operation, when moving to 2.5 seconds, the 13rd of counter CD4060 becomes high level, to the CD4043(R-S trigger that is attached thereto) the 6th triggering, make become high level at the 9th of CD4043, so the CD4069(not gate that is attached thereto) the 5th and CD4081(and door) the 8th all become high level, the CD4069(not gate) the 6th becomes low level, cause CD4081(and door) the 4th recover low level again, V1 ends, the Ja outage.When counter moves to the 4th second, if any the second time bell signal arrive, then the positive pulse that produces of P point will cause or the positive pulse of gate output terminal, and counter is cleared, and restart timing from the second time after the bell signal end; Not having for the second time when moving to the 4th second as above-mentioned counter, bell signal arrives, the 15th of CD4060 the becomes high level when then moving to the 5th second, that is CD4081(and the door) the 13rd become high level, since CD4081(with the door) the 12nd initial condition be high level, so CD4081(and door) the 11st point (being the 12nd point of CD4043) become high level, the 10th of CD4043 triggered into high level, promptly output K becomes high level, the V2 conducting, Jk work.Because after bell signal finishes for the first time, 2.5 the 9th point (that is the 8th point of CD4081) of CD4043 has been triggered to high level during second, and the 9th of CD4081 links to each other with the P point, so as long as bell signal arrival for the second time just makes this and gate output terminal (being CD4081 the 10th point) produce positive pulse signal, the 14th to CD4043 is triggered, with the 1st triggering of CD4043 is high level, so with the 1st CD4081(that links to each other and door) the 2nd become high level, from then on after, the 15th of (following bell signal is to the words of its zero clearing during as the 4th second) CD4060 just becomes high level as long as counter is when moving to the 5th second, and making CD4081(and door) the 1st and output (CD4081 the 3rd point) become high level, so all are triggered with the R end of the 3rd R-S trigger that links to each other, total system resets, output terminals A, K reverts to low level.

Logic control process simplified summary described above gets up to be: A, K end is low level during initial condition, when input P point has one group of positive pulse signal input, first positive pulse signal just triggers output terminals A and is high level, Ja work, and will move by the timer starting of oscillation that counter CD4060 constitutes simultaneously, pick up counting after last pulse signal ends of this group positive pulse signal (0 constantly) is when to 2.5 seconds, the A end reverts to low level by high level, the Ja outage; When to 4 seconds such as the P point input of second group of positive pulse signal is arranged, then timer is cleared and restarts timing after second group of positive pulse signal finishes; As there not being second group of positive pulse signal input above-mentioned 4 seconds the time, the K end becomes high level during then to 5 seconds, Jk work.After second group of positive pulse end, the P point has the positive pulse input within back 5 seconds as long as timer moves, and then timer is cleared and picks up counting again; As the no positive pulse input of P point within 5 seconds, system automatically resets during then to 5 seconds, and promptly A, K all revert to low level.

The course of work of this adapter is described below in conjunction with whole electrical schematic diagram:

2 of L1, the L2 line two ends of answering the call among the figure, wherein L1 must connect high potential.The A machine is a main frame, and the B machine is secondary machine.

One. outside line can be dialed directly A machine and B machine respectively

When the outside line calling party calls, the ring AC signal forms alternating voltage through C1, R1, R2 loop at the P point, be equivalent to import one group of positive pulse signal at the P point, wherein first positive pulse signal just triggers into high potential with the A input of control unit by electronegative potential, make relay J a work, Ja becomes disconnection by original closure, cut off the primary path that connects the A machine, the A power ringing does not ring (because of most ringing telephone stations circuit all have lagging circuit, so will not respond the ringing current of moment).After ringing current finished for the first time, the counter of logic control element inside began the starting of oscillation operation, and when moving to 2.5 seconds, the A point reverts to low level by high level, and Ja resets, and A machine loop is switched on.Because of ring-back tone and ring AC signal that the calling party hears from telephone receiver synchronous, desire to converse as the calling party with the A machine, then also permanent after hearing first ring-back tone, promptly with normally make a phone call equally, continue to wait for, when first bell signal finishes back 4 seconds so, must there be second bell signal to arrive,, so for the second time ringing current through A machine loop make A machine bell ring A machine user off-hook after just can with calling party converse because Ja resets this moment.Just realized calling party and A machine user's conversation this moment; If the calling party desires with B machine user's communication; then after the calling party hears first normal ring-back tone, phone is hung; at this moment logic control element must not receive ringing current for the second time when first ringing current finishes back 4 seconds; the K point just becomes high potential by electronegative potential when counter moves to 5 seconds, relay J k work, and this moment, the A machine was disconnected; the B machine is access in major loop; at this moment calling party's dial-up once more, then ringing current makes B machine bell ring through B machine loop.As long as B machine user is off-hook not, then must there be ringing current to arrive every 4 seconds, counter O reset is also picked up counting again, in case and just can converse behind the B machine user off-hook with the calling party, must not have the arrival of ringing current when after this counter moves to the 4th second again and to its zero clearing, so logic control element automatically resets when moving to the 5th second, promptly A, K become electronegative potential by high potential, this moment, flow through D4, D5 of B electromechanics provided bias current for V2, kept Jk work.After the talk-through on-hook, electric current is zero, and Jk resets.

In brief, desire and the conversation of A machine, then get final product by normal play as the outside line calling party; Desire and the conversation of B machine as the calling party, then on-hook after putting through phone to hear first normal ring-back tone, dialing again again after 5 seconds, what put through this moment must be the B machine.

Two .A machines and B machine all can be dialled outside line, and independent separately and interlocking

1.B machine is dialled outside line

Behind the B machine off-hook, phone is by high resistant step-down resistance state, the adapter power supply (+V) provide bias voltage for V2 through R8, D3, B machine (low-resistance), the V2 conducting, relay J k work, the result of Jk action inserts outer line loop with the B machine, and B2 named a person for a particular job and has enough voltage to keep the bias current of V2 all the time when the electric current that outside line this moment provides was flowed through B machine, D4, D5, promptly kept the work of Jk.But just number dialing telephone call of B machine this moment, the A machine is cut off automatically.

2.A machine is dialled outside line

The A machine is in the outer line loop at ordinary times all the time, but just number dialing telephone call behind the off-hook, this moment flow through A machine, R9(10 Ω of outer line current) time provide bias voltage in the pressure drop of B3 place formation for V3, the V3 conducting, C3 point current potential approaches zero.Even if this moment, B machine off-hook can not provide bias voltage for V2.So the B machine can't use, and has realized interlocking.

Claims (5)

1, a kind of bridging telephone adapter partly is made of shell, bell signal sensitive circuit, logic control element and control relay circuit etc.The output that it is characterized in that bell signal sensitive circuit (1) links to each other with the input of logic control element (2), and the output of logic control element (2) links to each other with the input of control relay circuit (3).Having constituted one under these three circuit actings in conjunction can carry out logic determines to the temporal regularity of telephone ring signal, and to the A machine of parallel connection, the device that B machine two machines carry out logic control.

2, bridging telephone adapter as claimed in claim 1 is characterized in that bell signal sensitive circuit (1) is made of capacitor C 1, resistance R 1, R2, and the load voltage on the R2 is that the alternating voltage that the P point produces is the input signal of logic control element (2).

3, bridging telephone connector as claimed in claim 1, it is characterized in that logic control element (2) is made of logic gates CD4043, CD4081, CD4069 and counter CD4060, D1, D2, R5 constitute OR circuit, and R3, R4 and C2 constitute the RC oscillator.

4, bridging telephone adapter as claimed in claim 1 is characterized in that control relay circuit by triode V1, V2, and relay J a, Jk constitute.Ja is a main line break-make relay, and Jk is major and minor machine transfer relay, can guarantee that any moment has only a phone to link to each other with outside line.R9 and V3 constitute B machine latch circuit.

5, bridging telephone adapter as claimed in claim 1, its feature is that also secondary machine (B machine) itself is again as a resistance change element can controlling transfer relay Jk, one end links to each other with power supply, and the other end links to each other with the input of the control element V2 of transfer relay Jk.