CN2203516Y - Push-key pulsing auto-switching double-voice-frequency telephone - Google Patents

Abstract

The utility model relates to a telephone, particularly a push-key pulsing auto-switching double-voice-frequency telephone. The utility model is formed by connection of a hook switch, a polar circuit, a start-up circuit, a pulse switch circuit, a pulse on-off control circuit, a double-voice-frequency signal amplification circuit, a power supply circuit, a talking circuit, a ringing circuit, a pulse / double-voice-frequency dialing integrated circuit, an external connection keyboard, a mobile phone and a pulse / double-voice-frequency (P/T) auto-switching circuit. The utility model ideally solves the problem of high bit error rate of secondary pulse dialing, and has the advantages of convenience and practicability. The utility model can play a promotion role to the development of DID technique.

Description

Push-key pulsing auto-switching double-voice-frequency telephone

The utility model relates to a kind of telephone set, and particularly a kind of button pulse is automatically converted to the dual tone phone machine.

The telecommunications industry of international community development at present is very fast, and most countries is because of the circuit deficiency, and the fund input of the big quantity of shortage, cause the difficult contradiction long-term existence of installing a telephone, so subscriber exchange is the requisite a kind of ancillary equipment of public switched network.In China, be example with Beijing, the ratio of subscriber exchange phone number and public network switch phone number is up to becoming 2.5:1, and the subscriber exchange network access mode just progressively develops to full-automation.DID(direct dialing in interior lines extension set particularly, DirectInwordDi-alling) development of technology, to cause artificial console transfer mode (BID, Boa-rd Inword Dialling) disappearance, subscriber exchange further is applied, brings into play the effect of local telephone network resource to greatest extent.But 1. DID1 technology in the present three kinds of implementations of DID technology, it is more to take local telephone network public network relay resource, and has soft in a large number, the adaptive problem of hardware with the public network equipment room, all realizes costly.2. DID2 technical approach, the unified upgrading of subscriber exchange is difficult to accomplish in reality, costly equally (this dual mode is to generally acknowledge inadvisable mode).3. DID two-stage dialing mode: the relay resource that neither takies public network, need not to change the capital equipment of program control main frame and subscriber exchange again, only need in subscriber exchange, to increase " direct inward dialing to extension autom " function, therefore, DID two-stage dialing mode is at present and even is in the future the basic mode that the DID technology realizes.

The difficult point part that realizes DID two-stage dialing technology is the discrimination problem of outside line user two-stage dialing, and for double-tone frequency phone, the line hepatitis consumption of two-stage dialing is minimum, can directly connect the control signal of extension wire as subscriber exchange.But for pulse mode, the attenuation of circuit is very big, and is changed beyond recognition in the porch of subscriber exchange basically, thereby general technological means is difficult to correct identification.The two-stage dialing Signal Processing technology of pulse mode has also become the key point that solves the DID technology.No matter be the pulse compression coding processing mode at present, or CPU Fuzzy Processing technology, all be difficult to the discrimination that reaches satisfied.

Push-button telephone begins to popularize gradually from the eighties, is one of achievement of modern electronic technology development.At present, the telephone set of domestic production all is touch-tone telephone more than 90%.Touch-tone telephone has a variety of, and more representational telephone set has two kinds, promptly 1. single pulse touch-tone telephone, 2. multi-function keyswitch type telephone set.First kind; one key formula telephone set; it is the early production that replaces the pulse machine; the function that only possesses the regular phone machine; as homemade HA14P(Shanghai Correspondent computer electrical equipment research institute) touch-tone telephone; use seldom at present; replaced by second kind of multi-feature telephone just gradually; this telephone set is except that the function that possesses the regular phone machine; also increased many auxiliary functions, mainly contained: digit retransmission; hand-free call; pause function; number storage and abbreviated dialing; the compatible dialing of pulse/audio frequency; " R " key function; on-hook keeps; the lock function; sound is closed in transmission; talked about repeating; liquid crystal display and timing clocking capability; and P/T translation function.More than these 12 kinds of functions, not only make touch-tone telephone perfect in shape and function more, convenient for users to use, simultaneously, owing to can adopt the double-tone number of taking place frequently mode, make and send out number quick and precisely, be difficult for wrong number, improved the utilance of switching equipment greatly.Present this dial mode is promoted, and estimates to replace fully in the future pulse dialing method.The more representational HA868P/TSDL that TCL company is arranged of this telephone set, the HA448(IV of Xuzhou Bao Hui Co., Ltd) P/TSDL liquid crystal display multifunction telephone set.The HA868P/TSDL telephone set of TCL company does not have the P/T handoff functionality, can only select fixedly dual-tone dialing mode; The HA448(IV of Xuzhou Bao Hui Co., Ltd) though P/TSDL liquid crystal multi-feature telephone has increased liquid crystal display, P/T conversion function key, realized being converted in the pulse dialing process dual-tone dialing mode, need when using phone to use inconvenient with manually pressing this key.

The purpose of this utility model is in order to provide a kind of button pulse easy to use, that the two-stage dialing call completing rate is high to change the dual tone phone machine automatically.

The utility model is realized by following technical scheme.Get switch hook ready, polar circuit, start-up circuit, pulse-switching circuit, the pulse switch control circuit, the double-audio signal amplifying circuit, power circuit, speaking circuit, ringing circuit, pulse/double-tone is (P/T) automatic switch-over circuit frequently, lead etc., telephone wire T, R links with switch hook earlier, the normally closed contact of switch hook and telephone wire R end link with ringing circuit, the normal opened contact of switch hook and the R of telephone wire end link with polar circuit, the output of polar circuit is divided into "+", "-" end, "+" of polar circuit end respectively with start-up circuit, the input of pulse-switching circuit links, "-" end and the start-up circuit of polar circuit, the pulse switch control circuit, the double-audio signal amplifying circuit, power circuit, pulse/dual-tone dialing integrated circuit, external connection keyboard, pulse/double-tone ground wire of (P/T) automatic switch-over circuit frequently links, the normal opened contact of pulse-switching circuit and pulse switch control circuit link, the normally closed contact of pulse-switching circuit and double-audio signal amplifying circuit, power circuit, speaking circuit links, the output and the mobile phone of speaking circuit link, start-up circuit output HR, the control end DP of pulse switch control circuit, the control end TONE of double-audio signal amplification appliance and the output VDD of current circuit link with pulse/dual-tone dialing integrated circuit, the output M of pulse/dual-tone dialing integrated circuit links as the control end and the speaking circuit of speaking circuit, frequently input and pulse/double-tone (P/T) automatic switch-over circuit of (P/T) automatic switch-over circuit link the output HR of the output M of pulse/dual-tone dialing integrated circuit and start-up circuit as pulse/double-tone simultaneously, pulse/double-tone output of (P/T) automatic switch-over circuit frequently links with the P/T key of external connection keyboard and the P/T switch of dialing integrated circuit ［ 10 ］ respectively, and promptly formation connects the pulse of key formula and changes the dual tone phone machine automatically.

Automatic switch-over circuit can be by switching circuit K2 frequently for pulse/double-tone, the ring-back tone identification circuit, drive circuit, electronic switching circuit K3 constitutes, telephone wire (T, R) input with switching circuit K2 links, link with speaking circuit simultaneously, speaking circuit and mobile phone link, integrated circuit provides output signal M and drive circuit links from dialling, the output of drive circuit links as control end and the switching circuit K2 of switching circuit K2, the output of switching circuit K2 and ring-back tone identification circuit link, the output of ring-back tone identification circuit links as control end and the electronic switching circuit K3 of electronic switching circuit K3, and the P/T switch of the output of electronic switching circuit K3 and external connection keyboard or pulse/dual-tone dialing integrated circuit links.

Pulse/double-tone (P/T) automatic switch-over circuit frequently also can be made of pulse-scaling circuit, vibration delay circuit, drive circuit, the M signal of dialing integrated circuit output and the HR signal and the pulse-switching circuit of start-up circuit output link, the output of pulse-scaling circuit links with the vibration delay circuit, vibration delay circuit and drive circuit link, and the output of drive circuit links with the P/T key of external connection keyboard or the integrated circuit P/T switch that dials respectively.

Pulse/double-tone frequency (P/T) automatic switching circuit can adopt modes such as relay, electronic analog swtich, photoelectric device or discrete component to the control mode of P/T switch or P/T button.

The utility model also can adopt the special-purpose integrated circuit that contains above function to realize.

The utility model has solved the high problem of the second pulse dialing error rate very ideally, and easy to use, to the development of DID technology, will play great facilitation; Especially to our such big country that ground is wide, the people is many, telecommunications are at the early-stage, difficult solution effect is very big to installing a telephone.Simultaneously, no matter domestic, external, because automatic telephone is base growth by pulse mode, the subscriber exchange of single pulse mode exists in a large number, and this utility model can make this part huge resource further play a role; Transforming this series products a little as for a large amount of button Pulse Electric phones just can continue to use; Can give full play to the effect of existing resource and improve the local telephone network call completing rate, have favorable economic benefit and social benefit.

Below in conjunction with drawings and Examples the utility model is described in further detail

Fig. 1: be the utility model structured flowchart

Fig. 2: be the utility model circuit diagram

Fig. 3: be the utility model pulse/double frequency (P/T) automatic switch-over circuit one example structure block diagram (identification ring-back tone mode)

Fig. 4: for the utility model pulse/double-tone frequency (P/T) automatic switch-over circuit one is implemented circuit diagram (identification ring-back tone mode).

Fig. 5: be the utility model pulse/double-tone frequency (P/T) automatic switch-over circuit one example structure block diagram (step-by-step counting mode).

Fig. 6-1: be utility model pulse/double-tone frequency (P/T) automatic switch-over circuit one embodiment circuit diagram (step-by-step counting mode--relay control mode).

Fig. 6-2: be utility model pulse/double-tone frequency (P/T) automatic switch-over circuit one embodiment circuit diagram

(step-by-step counting mode--electronic analog swtich control mode).

Fig. 6-3: be utility model pulse/double-tone frequency (P/T) automatic switch-over circuit one embodiment circuit diagram

(step-by-step counting mode--photoelectric device control mode)

Fig. 6-4: be utility model pulse/double-tone frequency (P/T) automatic switch-over circuit one embodiment circuit diagram

(step-by-step counting mode--discrete component control mode)

Referring to figs. 1 through Fig. 6, get switch hook ［ 1 ］ ready, polar circuit ［ 2 ］, start-up circuit ［ 3 ］, pulse switch ［ 4 ］, pulse-switching circuit ［ 5 ］, double-audio signal amplifying circuit ［ 6 ］, power circuit ［ 7 ］, speaking circuit ［ 8 ］, ringing circuit ［ 9 ］, pulse/dual-tone dialing integrated circuit ［ 10 ］, external connection keyboard ［ 11 ］, mobile phone ［ 13 ］, pulse/double-tone is (P/T) automatic switch-over circuit ［ 12 ］ frequently, lead etc., telephone wire T, R links with switch hook ［ 1 ］ earlier, the normally closed contact of switch hook ［ 1 ］ and telephone wire R end link with ringing circuit ［ 9 ］, the normal opened contact of switch hook ［ 1 ］ and the R of telephone wire end link with polar circuit ［ 2 ］, the output of polar circuit ［ 2 ］ is divided into "+", "-" end, audio frequency (P/T) automatic switch-over circuit ［ 12 ］, lead etc., telephone wire T, R links with switch hook ［ 1 ］ earlier, the normally closed contact of switch hook ［ 1 ］ and telephone wire R end link with ringing circuit ［ 9 ］, the normal opened contact of switch hook ［ 1 ］ and the T of telephone wire end link with polar circuit ［ 2 ］, the output of polar circuit ［ 2 ］ is divided into "+", "-" end, "+" of polar circuit ［ 2 ］ end respectively with start-up circuit ［ 3 ］, impulse circuit ［ 4 ］ links, "-" end and the start-up circuit ［ 3 ］ of polar circuit ［ 2 ］, pulse switch control circuit ［ 5 ］, double-audio signal amplifying circuit ［ 6 ］, power circuit ［ 7 ］, speaking circuit ［ 8 ］, pulse/dual-tone dialing integrated circuit ［ 10 ］, external connection keyboard ［ 11 ］, pulse/double-tone ground terminal of (P/T) automatic switch-over circuit ［ 12 ］ frequently links, the normal opened contact of pulse-switching circuit ［ 4 ］ and pulse switch control circuit ［ 5 ］ link, the normally closed contact of pulse-switching circuit ［ 4 ］ and double-audio signal amplifying circuit ［ 6 ］, power circuit ［ 7 ］, speaking circuit ［ 8 ］ links, the output of speaking circuit ［ 8 ］ and mobile phone ［ 13 ］ link, start-up circuit ［ 3 ］ output HR, the control end DP of pulse switch control circuit ［ 5 ］, the output VDD of the control end TONE of double-audio signal amplifying circuit ［ 6 ］ and power circuit ［ 7 ］ links with pulse/dual-tone dialing integrated circuit ［ 10 ］, and the output M of pulse/dual-tone dialing circuit ［ 10 ］ links as the control end and the speaking circuit ［ 8 ］ of speaking circuit ［ 8 ］.The output HR of the output M of pulse/dual-tone dialing circuit ［ 10 ］ and start-up circuit ［ 3 ］ is connected with pulse/double-tone frequency (P/T) automatic switch-over circuit ［ 12 ］ as the input of pulse/double-tone frequency (P/T) automatic switch-over circuit ［ 12 ］ simultaneously, pulse/double-tone output of (P/T) automatic switch-over circuit ［ 12 ］ frequently is connected with the P/T key of external connection keyboard ［ 11 ］ or the P/T switch of pulse/dual-tone dialing integrated circuit ［ 10 ］ respectively, promptly constitutes the button pulse and changes the dual tone phone machine automatically.

With reference to Fig. 3, Fig. 4, pulse/double-tone frequency (P/T) automatic switch-over circuit is by switching circuit K2 ［ 17 ］, ring-back tone identification circuit ［ 18 ］, drive circuit ［ 19 ］, electronic switching circuit K3 ［ 20 ］ constitutes, telephone wire T, the input of R and switching circuit K2 ［ 17 ］ links, link with speaking circuit ［ 8 ］ simultaneously, speaking circuit ［ 8 ］ links with mobile phone ［ 13 ］, the output signal M and the drive circuit ［ 19 ］ that provide from pulse double-tone frequency integrated circuit ［ 10 ］ link, the output of drive circuit ［ 19 ］ links as control end and the switching circuit K2 ［ 17 ］ of switching circuit K2 ［ 17 ］, the output of switching circuit K2 ［ 17 ］ and ring-back tone identification circuit ［ 18 ］ link, the output of ring-back tone identification circuit ［ 18 ］ is connected with electronic switching circuit K3 ［ 20 ］ as the control end of electronic switching circuit K3 ［ 20 ］, and the output of electronic switching circuit K3 ［ 20 ］ and external connection keyboard ［ 11 ］ or dialing integrated circuit ［ 10 ］ link.M is the purified signal that pulse/dual-tone dialing integrated circuit ［ 10 ］ sends for speaking circuit ［ 8 ］, and PT1, PT2 are two end points of this utility model external connection keyboard ［ 11 ］ P/T button or pulse/double-tone (P/T) dial automatically two contacts of P/T switch of integrated circuit ［ 10 ］ frequently; As shown in Figure 3, behind user's off-hook, the purified signal M that dialing integrated circuit ［ 10 ］ sends becomes low level by high level, after dialing is finished, the level of M becomes high level by low level again, and remain unchanged, the M signal is driven by drive circuit ［ 19 ］ and makes switching circuit K2 ［ 17 ］ conducting, ring-back tone identification circuit ［ 18 ］ is inserted telephone line, after ring-back tone identification circuit ［ 18 ］ detects ring-back tone, make electronic switching circuit K3 ［ 20 ］ conducting immediately, thereby make the P/T button of external connection keyboard ［ 11 ］ or the P/T switch connection of pulse/dual-tone dialing integrated circuit ［ 10 ］, finish telephone set by the conversion of pulse dialing to dual-tone dialing.

Wherein ring-back tone identification circuit ［ 18 ］ can be realized by phase-locked loop circuit ［ 63 ］, drive circuit ［ 19 ］ can be realized by the cmos nand gate circuit shown in ［ 64 ］, ［ 65 ］, switching circuit K2 ［ 17 ］, K3 ［ 18 ］ can adopt circuit such as relay, optocoupler and electronic analog swtich to realize, referring to Fig. 6-1, Fig. 6-2, Fig. 6-3, Fig. 6-4.

With reference to Fig. 5 and Fig. 6, (P/T) automatic switch-over circuit ［ 12 ］ also can be by pulse-scaling circuit ［ 14 ］ frequently for pulse/double-tone, vibration delay circuit ［ 15 ］, drive circuit ［ 16 ］ constitutes, the M signal of pulse/dual-tone dialing integrated circuit ［ 10 ］ output and the HR signal and the pulse-switching circuit ［ 4 ］ of start-up circuit ［ 3 ］ output link, the output of pulse-scaling circuit ［ 14 ］ links with vibration delay circuit ［ 15 ］, the output of drive circuit ［ 16 ］ links with external connection keyboard ［ 11 ］ P/T key or dialing integrated circuit ［ 10 ］ P/T switch respectively, drive circuit ［ 16 ］ can be relay control mode (shown in Fig. 6-1) to the control mode of P/T switch or P/T button, electronic analog swtich control mode (shown in Fig. 6-2), photoelectric device control mode (shown in Fig. 6-3) or discrete component control mode (shown in Fig. 6-4), as shown in Figure 5, behind user's off-hook, the HR signal that start-up circuit ［ 3 ］ produces becomes low level by high level, pulse/dual-tone dialing integrated circuit ［ 10 ］ is started working, accepting numeral keys in, become low level by the M signal that pulse/dual-tone dialing integrated circuit ［ 10 ］ produces by high level this moment, after dialing is finished, the M level becomes high level by low level again, and this function utilizes HR signal and M signal to realize.

Wherein pulse-scaling circuit ［ 14 ］ can be realized by the CMOS shown in ［ 61 ］, TTL pulse counter, vibration delay circuit ［ 15 ］ can add accessory circuit by the monostable oscillator of CMOS, TTL shown in ［ 62 ］ and form, and drive circuit ［ 16 ］ can be by realizations such as TTL, cmos nand gate circuit.

The course of work of the present utility model is, when the user picks up mobile phone ［ 13 ］, switch hook ［ 1 ］ is transferred to by normally closed node often leaves node, makes and often opens the node conducting, start-up circuit ［ 3 ］ work produces the HR signal, makes pulse/dual-tone dialing integrated circuit ［ 10 ］ enter the dialing standby condition.When pulse dialing method, after first group pulse dialing is finished, make pulse/double-tone frequency (P/T) automatic switch-over circuit ［ 12 ］ work by the HR signal of start-up circuit ［ 3 ］ generation and the purified signal M of pulse/double-tone (P/T) dialing integrated circuit ［ 10 ］ generation frequently, cross 20MS, dial mode is automatically converted to double-tone mode frequently by pulse mode, and dial-up after this is operating as double-tone dial-up operation frequently.On-hook is restored and is pulse dialing method.

The utility model is a kind of new design on the basis of P/T Campatible telephone set, except that the major function that comprises touch-tone telephone in the market, and has increased new function:

(1) digit retransmission function and chance are busy repeatedly redials automatically

After phone has been dialled number, confirm that switch sends busy tone here, on-hook temporarily, wait several seconds after again by typematic key; Perhaps during busy tone, press redial key, phone will redial the other side's number of certain number of times automatically.

(2) insert the stand-by period (time out) in the dialing procedure

Click Pause key in a number centre and just can when retransmitting this number next time, send out one period stand-by period of insertion between number numerals at corresponding two;

(3) number storage and abbreviated dialing function

Some commonly used telephone numbers are pre-deposited in the telephone set, finish dial feature by 1--2 address key when needing;

(4) pulse/double-tone is compatible dial feature frequently

This phone can also adopt the double-tone DTMF mode number of sending out frequently except that adopting Pulse Dialing; Dial the setting of P/T switch in advance.

(5) P/T translation function

Be provided with pulse to double-tone conversion key frequently.When using phone, being pulse mode by number mode before this key, is double-tone mode frequently by number mode of sending out behind this key.After the telephone set on-hook, can revert to pulse mode automatically.

(6) " R " key function

It is a kind of a kind of function that cooperates switch to use

(7) lock function

The lock function exactly can be to limiting by first of electricity words number (or former position) numeral;

(8) talked about function

When circuit is longer, think that sometimes phone volume is too little, so that can't not hear, talked about the repeating function and can suitably be added the speech amount that receives greatly;

(9) sound function is closed in transmission

Telephone set is pressed during this key, and speech can not delivered on the circuit by receiver;

(10) hand-free call function

(11) on-hook wire holding function

(12) pulse dialing is automatically converted to the function of dual-tone dialing

The notable attribute of the utility model is to make phone under pulse dialing method, after finishing first group pulse dialing, automatically make pulse dialing method be converted to double-tone mode frequently, after this can converse, also can on talk line, carry out two-stage dialing, at this moment be double-tone mode frequently, thereby realize the high call completing rate of phone two-stage dialing very easily.

Claims (5)

1, the dual tone phone machine is changed in a kind of button pulse automatically, comprise switch hook [1], polar circuit [2], start-up circuit [3], pulse-switching circuit [4], pulse switch control circuit [5], double-audio signal amplifying circuit [6], power circuit [7], speaking circuit [8], ringing circuit [9], pulse/dual-tone dialing integrated circuit [10], external connection keyboard [11], mobile phone [13], it is characterized in that described button pulse changes the dual tone phone machine automatically, also comprise pulse/double-tone (P/T) automatic switch-over circuit [12] frequently, telephone wire T, R links with switch hook [1] earlier, the normally closed contact of switch hook [1] and telephone wire R end link with ringing circuit [9], the normal opened contact of switch hook [1] and the R of telephone wire end link with polar circuit [2], the output of polar circuit [2] is divided into "+", "-" end, "+" of polar circuit [2] end respectively with start-up circuit [3], pulse-switching circuit [4] is connected, "-" of polar circuit [2] end respectively with start-up circuit [3], pulse switch control circuit [5], double-audio signal amplifying circuit [6], power circuit [7], speaking circuit [8], pulse/dual-tone dialing integrated circuit [10], external connection keyboard [11], pulse/double-tone ground terminal of (P/T) automatic switch-over circuit [12] frequently links, the normal opened contact of pulse-switching circuit [4] and pulse switch control circuit [5] link, the normally closed contact of pulse-switching circuit [4] and double-audio signal amplifying circuit [6], power circuit [7], speaking circuit [8] links, the output of speaking circuit [8] and mobile phone [13] link, start-up circuit [3] output HR, the control end DP of pulse switch control circuit [5], the output VDD of the control end TONE of double-audio signal amplifying circuit [6] and power circuit [7] links with pulse/dual-tone dialing integrated circuit [10], the output M of pulse/dual-tone dialing circuit [10] links as the control end and the speaking circuit [8] of speaking circuit [8], the output HR of the output M of pulse/dual-tone dialing circuit [10] and start-up circuit [3] links as input and pulse/double-tone frequency (P/T) automatic switch-over circuit [12] of pulse/double-tone frequency (P/T) automatic switch-over circuit [12] simultaneously, and pulse/double-tone output of (P/T) automatic switch-over circuit [12] frequently links with the P/T key of external connection keyboard [11] or the P/T switch of dialing integrated circuit [10] respectively.

2, the dual tone phone machine is changed in button pulse as claimed in claim 1 automatically, it is characterized in that described pulse/double-tone frequency (P/T) automatic switch-over circuit ［ 12 ］ is by switching circuit K2 ［ 17 ］, ring-back tone identification circuit ［ 18 ］, drive circuit ［ 19 ］, electronic switching circuit K3 ［ 20 ］ constitutes, telephone wire T, the input of R and switching circuit K2 ［ 17 ］ links, link with speaking circuit ［ 8 ］ simultaneously, speaking circuit ［ 8 ］ links with mobile phone ［ 13 ］, provide output signal M and drive circuit ［ 19 ］ links from dialing integrated circuit ［ 10 ］, the output of drive circuit ［ 19 ］ links as output and the ring-back tone identification circuit ［ 18 ］ of switching circuit K2 ［ 17 ］, the output of ring-back tone identification circuit ［ 18 ］ links as control end and the electronic switching circuit K3 ［ 20 ］ of electronic switching circuit K3 ［ 20 ］, and the P/T switch of the output of electronic switching circuit K3 ［ 20 ］ and external connection keyboard ［ 11 ］ P/T button or dialing integrated circuit ［ 10 ］ links.

3, the dual tone phone machine is changed in button pulse as claimed in claim 1 automatically, it is characterized in that described pulse/double-tone frequency (P/T) automatic switch-over circuit ［ 12 ］ is by pulse-scaling circuit ［ 14 ］, vibration delay circuit ［ 15 ］, drive circuit ［ 16 ］ constitutes, the HR signal and the pulse-switching circuit ［ 4 ］ of the M signal of dialing integrated circuit ［ 10 ］ output and start-up circuit ［ 3 ］ output link, the output of pulse-scaling circuit ［ 14 ］ links with vibration delay circuit ［ 15 ］, vibration delay circuit ［ 15 ］ links with drive circuit ［ 16 ］, and the output of drive circuit ［ 16 ］ links with the P/T key of external connection keyboard ［ 11 ］ or the P/T switch of dialing integrated circuit ［ 10 ］ respectively.

4, change the dual tone phone machine automatically as claim 3,4 described button pulses, it is characterized in that the output signal of described change-over circuit ［ 12 ］; Promptly the output of ［ 16 ］, ［ 20 ］ can be relay, electronic analog swtich, photoelectric device or discrete component control mode to the control mode of P/T switch or P/T button.

5, the dual tone phone machine is changed in button pulse as claimed in claim 1 automatically, and the circuit that double-tone function frequently realizes that electronic devices and components are realized is changed in its pulse automatically, also the integrated circuit of electronic component circuit.

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