CN2181785Y - Automatic dialing device for telephone - Google Patents

Abstract

The utility model relates to an automatic dialing device for a telephone, comprising signal identification circuits, control circuits and a state register. The signal identification circuit part sends various signals which are identified to the corresponding control circuits, and the signals are stored in the state register at the inner part of the utility model. Each control circuit can complete the corresponding control according to the value of the state register. The utility model has the advantages of simple circuits, reliable performances, low cost, high-speed identification, accuracy strong versatility, multiple functions, easy installation, etc., and can be directly installed on the telephone which is provided with hand-free function or any telephone which is made a little improvement.

Description

Automatic dialing device for telephone

The utility model relates to a kind of improvement of telephone device, specifically a kind of telephone automatic dialing unit.

The automatic dialing of existing telephone mainly is to be realized by function key, be that the user is when dialing, can repeat by " function key " until the other side's closing of the circuit, " " the dial telephone automatically that thisly needs the user constantly by " function key ", in fact just reduced the number of times of dialling the number repeatedly, the inreal problem of transmitting number incessantly to the other side automatically that solves, although the improvement of more existing telephone automatic dialing units now, but still have the following disadvantages, (1) adopt single-chip microcomputer to control, busy tone, dialing tone, the detection of ring-back is adopted and is amplified, shaping, differential circuit and detecting circuit are discerned or are adopted signal to amplify, filter shape, frequency ratio waits circuit to discern circuit complexity, cost height, signal identification lags behind, and is inaccurate.(2) recognition function of no prompt tone and dual-tone dialing function, versatility is poor.On the stored-program control exchange of popularizing at present, lost its autoredialing function.(3) no automatic hand-up function and redial that the time interval is adjusted and static redialing function.

The purpose of this utility model is for solving the weak point in the prior art, provide a kind of circuit simple, the telephone automatic dialing unit that identification is quick, accurate, cost is low, have multiple function.

Structure of the present utility model is made up of identification circuit and control circuit and status register three parts, and signal recognition circuit comprises phase-locked loop frequency identification circuit (U2), speech recognition circuit (U3A), (U3B), busy tone identification circuit, ring-back tone identification circuit, ring back tone identification circuit (IC01), dialing tone identification circuit; Control circuit comprises delay control circuit (U1), and do not hang logical control circuit, dislodging machine control circuit, hang logical control circuit, control circuit is squeezed in outside line, redial control circuit, muting control circuit and power control circuit, all control circuits and busy tone identification circuit, the ring-back tone identification circuit, the ring back tone identification circuit, by model is programmable logic chip (U4) formation of PAL20RA10, the phase-locked also distinguishing signal of frequency identification circuit (U2) is sent into the busy tone identification circuit in the chip (U4) respectively, the ring-back tone identification circuit, the dialing tone identification circuit, speech recognition circuit (U3A), (U3B) signal is sent into the logical control circuit of extension of chip (U4), ring back tone identification circuit (IS01) signal is sent into the logical control circuit of chip (U4) extension and control circuit is squeezed in outside line, the various signals that the signal recognition circuit part will identify are given correspondent control circuits and are kept in its inner status register, each control circuit is finished control corresponding according to the value of status register, until connecting phone.

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

(1) circuit mainly is made up of a CMOS chip and a programmable logic chip, and its circuit is simple, dependable performance, and cost is low.

(2) adopt the phase-locked loop frequency recognition technology to discern busy tone, dialing tone, ring-back tone, its identification fast, accurately.

(3) highly versatile has pulse and double-tone two kinds of code sending methods frequently.

(4) multi-functional, have the prompt tone recognition function, redial time interval regulatory function, going into property of outside line, automatic hand-up and static state such as redial at function.

(5) easily install, can directly be contained on the telephone set with hand-free function, improve to be added on any telephone set a little.

Below in conjunction with drawings and Examples structure of the present utility model is further described.

Fig. 1 is a theory diagram of the present utility model.

Fig. 2 is an electrical block diagram of the present utility model.

By accompanying drawing as can be known the utility model form by identification circuit and control circuit and status register three parts, signal recognition circuit comprise phase-locked loop frequency identification circuit (U2), speech recognition circuit (U3A) (U3B), busy tone identification circuit (U4); Ring-back tone identification circuit (U4) ring back tone identification circuit (IS01), dialing tone identification circuit (U4) control circuit comprises delay control circuit (U3C), (U3D) do not have the logical control circuit (U4) of extension, dislodging machine control circuit (U4), hang logical control circuit (U4), control circuit (U4) is squeezed in outside line, redial control circuit (Q3) (U4), muting control circuit (U4) (U1A) and power control circuit (U4) (Q1) (Q2), the recognition function of all controlled function and part signal is the programmable logic chip (U4) of PAL20RA10 by model or is realized by a plurality of gate circuits and trigger, the various signals that the signal recognition circuit part will identify are given correspondent control circuits and are kept in its inner status register, each control circuit is finished control corresponding according to the value of status register, till closing of the circuit.The course of work of each several part is:

The phase-locked loop frequency identification circuit of forming by model LM567 chip and resistance capacitance (U2), identify the 450HZ ± 25HZ audio signal of composition busy tone that the process control switch sends here, dialing tone, ring-back tone, send into programmable logic device (U4) then and carry out the identification of various signal tones.

Speech recognition circuit by signal amplification circuit (U3B), detecting circuit (D5) (D6) voltage comparator circuit (U3A) form, when the voice signal that has stored-program control exchange to send here on the telephone line, voltage comparator (U3A) output high level is given (U4) pin 2.

After the user has dialled required number, stored-program control exchange is sent busy tone here, ring-back tone or verbal cue sound, as phase-locked loop frequency identification circuit (U2), when identifying busy tone on the communication line or sound circuit and identifying prompt tone, do not hang the on-hook of circuit passband control dislodging machine circuit, simultaneously (U3D) and resistance by (U3C), the delay control circuit that electric capacity is formed is started working, after the phone on-hook, the 8 pin output high level of U3C, by (W1) electric capacity (C16) is charged, when being higher than 13 pin of (U3D), the voltage of electric capacity (C6) (redials the time interval by adjustable resistance (W1) setting, adjustable continuously in 0 second-3 minutes), the 14 pin output high level of delay circuit (U3D), deliver to 9 pin of (U4), (U4) the dislodging machine circuit in produces the off-hook action, when the dialing tone testing circuit detects dialing tone on the circuit, and do not hang logical control circuit control by (U4), triode (Q3), that resistance (R1)) forms redials circuit, 20 pin output high level at (U4), at this moment triode (Q3) conducting redials switch connection, begins to redial, each control circuit that resets simultaneously enters next time and detects and state of a control.

After phone is met busy on-hook, as outside at this moment when having phone to squeeze into ringing, photoelectric tube conducting in the photoelectric coupling circuit (IC01), (U4) 5 pin become high level, (U4) detect this signal after, trigger to hang to lead to and squeeze into control circuit, block delay control circuit (U3D) simultaneously, even delay time arrives with outside line, do not carry out off-hook yet, but wait for that the user answers the call, behind user's off-hook talk-through, control circuit (U4) is squeezed in outside line, reset and hang logical control circuit (U4) and delay control circuit (U3D), the work that redials before continuing to repeat if the user does not remove to connect this circuit, at this moment redials circuit and stops automatic re-dialing function.

When the phone extension is logical, the ring-back tone identification circuit detects the ring-back tone on the circuit, trigger and hang logical control circuit, blockade redials control circuit and no longer redials, 1,2 termination that triggers the 18 pin output high level integrated switching circuit U1A of muting control circuit (U4) is simultaneously led to, and opens loud speaker, at this moment loud speaker is sent ring-back tone, tells the user that this phone is put through.By being provided with and cancelling quiet redialing function by the SW1 button.After user's communication finishes on-hook, to hang logical control circuit triggering and reach the power control circuit of (U4) forming by triode (Q1), (Q2), diode (D1) resistance, electric capacity, powered-down finishes this task.

When phone hang logical after, if the user is absent from the scene, not and the other side when conversing, after the other side put down phone, switch was not sent busy tone here, hung logical control circuit and busy tone and controlled the dislodging machine circuit together and carry out on-hook, powered-down simultaneously, realization automatic hand-up.

Open the moment of hand-free function switch the user, triode (Q1), (Q2) conducting, control circuit must be established beginning work by cable, meanwhile, (U4) power control circuit is set connecting moment in, its output pin 19 output high level make power circuit begin normal power supply, when pressing when redialing cancel key SW2 automatically, (U4) pin 23 becomes high level, (U4) pin 19 output low levels, triode (Q1) and (Q2) end, circuit is stopped power supply, automatically redialing circuit no longer works, and when redialing state, power supply is not worked, and can prolong the service time of battery so greatly non-automatic.

Having the connected mode that hand-free function telephone set and this circuit respectively hold pin is, I1 is connected to the non-earth terminal of hands-free phone volume control potentiometer, I2 and I3 are connected respectively to the positive and negative terminal of the tinkle of bells circuit rectification output, the answer the call power positive end of machine of I4, the answer the call hands-free state end of machine of I5, the answer the call MUTE end of sending chip in the machine of I6, I7 connects the anode (6V) of the working power of this circuit, I8 the answer the call ground wire of machine and the negative terminal of working power, the 01 hands-free control end of answering the call machine, 02 and 03 connects the positive and negative terminal that redials button respectively.04 and 05 answers the call between machine volume control potentiometer and the holding wire that amplifying circuit links to each other.For not having the hand-free function telephone set, after loading onto handfree circuit, connect in a manner described and can realize automatic dialing.This device all is suitable for the telephone set with pulse or double-tone frequency function.

Claims (9)

1, a kind of telephone automatic dialing unit, it is characterized in that described device is made up of signal recognition circuit and control circuit and status register three parts, signal recognition circuit comprises phase-locked loop frequency identification circuit (U2), speech recognition circuit (U3A), (U3B), busy tone identification circuit, ring-back tone identification circuit, ring back tone identification circuit (IS01), dialing tone identification circuit; Control circuit comprises delay control circuit (U1), and do not hang logical control circuit, dislodging machine control circuit, hang logical control circuit, control circuit is squeezed in outside line, redial control circuit, muting control circuit and power control circuit, all control circuits and busy tone identification circuit, the ring-back tone identification circuit, the ring back tone identification circuit, by model is programmable logic chip (U4) formation of PAL20RA10, the phase-locked also distinguishing signal of frequency identification circuit (U2) is sent into the busy tone identification circuit in the chip (U4) respectively, the ring-back tone identification circuit, the dialing tone identification circuit, speech recognition circuit (U3A), (U3B) signal is sent into the logical control circuit of extension of chip (U4), ring back tone identification circuit (IS01) signal is sent into the logical control circuit of chip (U4) extension and control circuit is squeezed in outside line, the various signals that the signal recognition circuit part will identify are given correspondent control circuits and are kept in its inner status register, and each control circuit is finished control corresponding according to the value of status register.

2, telephone automatic dialing unit according to claim 1 is characterized in that phase-locked loop frequency identification circuit (U2) is made up of model LM567 chip and Resistor-Capacitor Unit.

3, telephone automatic dialing unit according to claim 1 is characterized in that speech recognition circuit is made up of signal amplification circuit (U3B), detecting circuit (D5), (D6) voltage comparator circuit (U3A).

4, telephone automatic dialing unit according to claim 1 is characterized in that ringing identification circuit is made up of photoelectric coupling circuit (IS01).

5, telephone automatic dialing unit according to claim 1 is characterized in that delay control circuit is made up of amplifier (U3C), (U3D) and resistance, electric capacity.

6, telephone automatic dialing unit according to claim 5 is characterized in that delay control circuit resistance (W1) is adjustable resistance.

7, telephone automatic dialing unit according to claim 1 is characterized in that power control circuit is made up of programmable logic chip (U4), triode (Q1), (Q2) and diode (D1) and resistance, electric capacity.

8, telephone automatic dialing unit according to claim 1 is characterized in that redialing control circuit and is made up of programmable logic chip (U4), triode (Q3) and resistance (R1).

9, telephone automatic dialing unit according to claim 1 is characterized in that static state redials circuit and is made up of (U4) and integrated switching circuit (V1A).

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