CN2672994Y - Anti-theft telephone with door bell - Google Patents

Abstract

The utility model relates to a take theftproof phone of doorbell. At present, the anti-theft telephones sold in the market have the problems that a plurality of anti-theft positions cannot be protected at the same time, and the anti-theft function cannot be played in a theft mode that the anti-theft telephone is dialed while the mobile telephone is held. The utility model aims at providing a can overcome prior art defect, have theftproof function, doorbell function, acoustic control answer telephone function, carry out the function that detects and the theftproof phone of taking doorbell of function of leaving a message to telephone line. The utility model consists of a vibration receiving-wireless transmitter, a wireless signal receiver, a CPU, a telephone circuit, a dial tone memory, a voice storage circuit, a power circuit, an exchanger, a doorbell circuit, a loudspeaker, a microphone circuit and a voice control starting circuit. The utility model discloses can protect a plurality of theftproof positions simultaneously, solve the theftproof problem of stealing of the cell-phone of beating.

Description

Anti-theft phone with doorbell

Technical field

The utility model relates to a telephone anti-theft device, in particular to an anti-theft telephone with a doorbell.

Background technique

At present, the anti-theft phones sold on the market have the following problems: they only protect the door, but cannot protect multiple anti-theft positions at the same time; only electromagnetic switches can be installed and used, and ultraviolet probes, infrared probes, microwave The anti-theft phone of the probe will be disturbed when someone passes by; for holding a mobile phone, dialing the anti-theft phone while stealing, the existing anti-theft phone cannot play the anti-theft effect.

Contents of Invention

The purpose of this utility model is to provide a kind of anti-theft phone with doorbell that can overcome the defects of the prior art and has anti-theft function, doorbell function, voice control answering phone function, function of detecting telephone lines and message function.

The purpose of this utility model is achieved in that:

The anti-theft phone with doorbell is composed of vibration receiving-wireless transmitter, wireless signal receiver, CPU, telephone circuit, dial tone memory, voice storage circuit, power supply circuit, switch, doorbell circuit, speaker, microphone circuit, and voice-activated power-on circuit. Wherein, telephone circuit (2) is connected with CPU (1), dial tone memory (7), switch (13), switch (15), voice storage circuit (6), sound-activated switch circuit (8) are interconnected; Receiving-wireless connection between wireless transmitter (4) and wireless signal receiver (5); CPU (1) and telephone circuit (2), dial tone memory (7), voice control switch circuit (8), loudspeaker, microphone circuit (12), voice storage circuit (6) is connected with each other; Doorbell circuit (3) is connected with switch (15), loudspeaker, microphone circuit (12); Switch (16) is connected with loudspeaker, microphone circuit (12), voice The storage circuit AW1 and the switch (15) are connected to each other; the switch (15), the switch (13) and the switch (14) are connected to each other; the handle circuit (9) of the telephone circuit (2) is connected to the switch (13) The loudspeaker and receiver microphone (10) of the telephone circuit (2) are connected with the switch (14).

Above-mentioned anti-theft phone with doorbell, wherein, vibration accepting-wireless transmitter (4), wireless signal receiver (5) is the wireless transmitter and the wireless receiver that have password.

The above-mentioned anti-theft phone with doorbell, wherein, CPU adopts single-chip microcomputer PIC16C54.

In the above-mentioned anti-theft telephone with a doorbell, the telephone circuit (2) adopts a fixed telephone circuit.

The above-mentioned anti-theft phone with a doorbell, wherein, the dial tone memory (7) adopts an ISD1810 chip or a fixed-line telephone CPU.

In the above-mentioned anti-theft phone with a doorbell, the voice storage circuit adopts the ISD1810 chip.

In the above anti-theft phone with a doorbell, the switch adopts an integrated circuit 4053.

In the anti-theft phone with a doorbell, the doorbell circuit is composed of an integrated circuit for ringing and a circuit for converting sound signals into audio signals.

Above-mentioned anti-theft telephone with doorbell, wherein, the horn, microphone circuit is made up of horn, microphone, button.

In the anti-theft phone with a doorbell, the voice-activated switch circuit is composed of a single-chip microcomputer PIC12C50X, an ISD1818 chip and a circuit for converting voice signals into audio signals.

Compared with the prior art, the utility model has the following advantages:

Not only the door is protected, but also multiple anti-theft positions can be protected at the same time. By using wireless probes, even moving targets, such as cars and motorcycles, can be protected against theft; , when at the aisle, the anti-theft phone will not be disturbed; for holding a mobile phone, dialing the anti-theft phone while stealing theft mode, the anti-theft phone of the present utility model can normally bring into play the anti-theft effect.

Description of drawings

Accompanying drawing 1 is the circuit block diagram of the present utility model;

Accompanying drawing 2 is the circuit principle diagram of the present utility model.

Detailed ways

Embodiment of the utility model is illustrated below in conjunction with accompanying drawing:

With reference to accompanying drawing 1, accompanying drawing 2. The vibration acceptance-wireless transmitter (4) is installed on the anti-theft place (such as doors, cabinets, automobiles, motorcycles, windows, etc.), once it is found that the place is stolen, the vibration acceptance-wireless transmitter (4) sends an order to make the vibration Accept-the remote controller at the Y1 part of the wireless transmitter (4) turns on and sends out a wireless signal, which is accepted by the wireless signal receiver (5), output to the CPU (1), enters the phone (2), and turns on the phone, Then enter the dial tone storage device (7), input the dial audio signal (telephone number) entered in advance to the telephone (2), realize the automatic calling function, and simultaneously input the voice information entered in advance in the voice storage circuit (6) (Information such as the vibration acceptance during the title-the address of the place where the wireless transmitter (4) is installed) is transmitted to the homeowner's mobile phone (or other pre-fixed phones) by the phone (2), when the homeowner answers the phone according to the information What is heard is the vibration reception - the address of where the wireless transmitter (4) is installed. The reason for entering voice information into circuit 6 in advance is that according to the method above, vibration acceptance-wireless transmitter (4), circuit (6) and wireless signal receiver (5) circuits can be increased by the same number, allowing them to protect more House and anti-theft office, now in order to distinguish these places, it is necessary to input the address here in the form of voice, according to this information, it is very convenient to determine the stolen place and arrive in time.

Working principle: When the vibrator JN1 in the vibration receiving-wireless transmitter (4) vibrates, it outputs a positive voltage, enters the capacitor C6 through R11 (inductive adjustable resistance), enters the second pin of the IC1 circuit through R14 and then amplifies it from The output of pin 7 enters the base of the triode V1 through R12 and makes it work. At this time, the voltage of the collector becomes a negative voltage. When the negative voltage enters K3 (photoelectric switch), the subsequent stage of K3 is turned on and turned on. Vibration is accepted-the K7 button of the wireless signal transmitter H1 in the wireless transmitter (4) is connected and sends a wireless signal, and this wireless signal is accepted by the wireless signal receiver (5), from the wireless signal receiver (5) The first pin outputs positive voltage, enters the second pin of CPU (1), outputs from pin 17, enters the base of the triode V6 and makes it enter the working state, the emitter outputs high level, the photoelectric switch K4, and the rear stage at the same time It is turned on, the 5 and 6 pins of the phone (2) are connected (the connection time is 0.5 seconds) (the 5 and 6 pins are the lines drawn from the hands-free key), the phone (2) is turned on (this time is equivalent to pressing the hands-free key), after 0.5 seconds, the positive voltage is output from pin 18 of the CPU (1), enters the base of the triode V7 and makes V7 enter the working state, outputs a high level from the emitter, enters K5 (photoelectric switch), and the rear stage It is turned on and the PE pin of the IS4 circuit is grounded. At this time, the pre-input dial tone signal is output from the SP+ pin to the 8 pin of the phone (2) (the 6th pin of the CPU supervises the process of the dial tone signal being input to the phone 2 , when a phone number is all input, the 18th pin of the CPU is changed to a low level, thereby stopping the process of transmitting the phone number from the IS4 circuit to the phone 2, entering the phone network and realizing the purpose of calling the predetermined number, and at the same time Output high level from the 9th pin of CPU (1), enter the base of triode V19 and make it in working state, the emitter output high level, this high level is stabilized at 5V by voltage regulator G1, and then it will be used for voice The US pin of IS2 in the storage circuit (6) supplies power. At this time, the pre-input voice signal (the address of the installation place of No. 4 circuit) is output from SP+, SP-, and then enters the T3 coil of the induction transformer L2 and induces the T1 coil (The T1 coil is connected to the microphone MIC7 in the circuit 10), and the induced signal enters the telephone line (the duration of the signal entering the telephone is 4 seconds, if No. 4 circuit constantly accepts the surrounding vibration in these 4 seconds That is to say, someone keeps moving the place where the circuit is installed within these 4 seconds, and the signal will continue to be transmitted), just like this, what the homeowner hears at this moment when answering the phone is the input to No. 6 circuit in advance The address of the installation place of No. 4 circuit, according to this information, the homeowner can easily determine the stolen place and can arrive in time. When the homeowner hangs up the mobile phone, the whole circuit will return to its original state.

Introduce below this utility model can work together with doorbell also can only work as the function of doorbell:

The utility model is a structure in which the telephone and the doorbell are integrated, and it can also play the role of the doorbell we use now. When using this feature, it acts as a doorbell if there is someone in the house. When there is no one at home, if a guest comes to his house and presses the button on the door (K17 in No. 12 circuit), the phone (2) and the doorbell (3) are connected to each other and through some signal transmission-receiving processes, they can automatically Dial the number pre-entered by the homeowner to realize timely communication between the homeowner and the guest.

When the utility model works with the doorbell or only works as a doorbell, the distinctive feature is that the whole process is automatic, that is to say, after the circuit is initialized, the connection, disconnection or signal transfer process between the circuits is automatic. You can set the forwarding number only once for the phone, and you don’t need to repeat it next time.

It mainly consists of a doorbell circuit (3), switches (15, 13), loudspeaker, microphone and buttons (12), telephone (2), dial tone memory (7), CPU (1), microphone in the handle (9) And switch (4) composition. The connections between them are:

The output ends of the loudspeaker, the microphone and the button (12) are connected with the input end of the doorbell (3) and the input end of the CPU (1). The output of the AW1 circuit is connected to the input of the switch (16), and the switch (15) is bidirectionally connected with the doorbell (3), the telephone (2), and the switch (13,14,16), and the telephone (2) is connected with the switch Devices (13, 14), CPU (1), and dial tone memory (7) are bidirectionally connected.

Introduce the technical solution of doorbell (3) and phone (2) work together below:

Loudspeaker shown in the block diagram, microphone and button (12) are installed on the side facing outwards of the door, and between the No. 12 circuit and the button door, an elastic thing like a sponge is placed, because the circuit (4) used to realize the anti-theft function It is fixed behind the door, so in order to avoid the interference circuit (4) such as voice, button sound, etc., so this kind of measure is used.

When the guest presses the button in (12), the command enters the CPU (1), enters the phone (2) after the output and makes it open, and then the mobile phone number of the house owner that has been input in advance (the dial tone signal in the dial tone memory 7) ) is input into the telephone (2), and the automatic dialing function is realized. At the same time, when pressing the button K17 in (12), the phone (2) will be opened, the light-emitting diode of the indication working time will generate electricity and enter the circuit 14 indirectly, and the doorbell (3) and the phone (2) will be connected by the induction transformer L1 and L3. ) inductive connection, creating conditions for guests and homeowners outside, so that homeowners outside can contact guests instantly through mobile phones.

Working principle: When the button K17 in (12) installed on the door is pressed, a low level comes out, this low level enters the A pin of the switch K6, comes out from the B pin, enters the A pin of the relay V1, and passes through the C pin Then it enters pin 1 of the CPU (1), and a high level from its pin 17 enters the base of the triode V6 and makes V6 enter the working state, and the level from the emitter enters the main power of the photoelectric switch (K4). At the same time, the rear stage is turned on and the 5 and 6 pins of the phone (2) are connected (the 5 and 6 pins are the leads from the hands-free key of the circuit 2), the phone (2) is turned on, and after 1 second, A high level comes out from pin 18 of the CPU (1), enters the base of the triode V7 and makes V6 enter the working state, comes out a high level from the emitter level, enters the main level of the photoelectric switch K5, and at the same time, the latter level is turned on, Make the PE pin of the IS4 circuit in the No. 7 circuit be grounded, and the pre-input dial tone signal comes out from the SP- and SP+ pins and enters the 8th pin of the phone 2, and transmits it to the telephone network to realize automatic dialing. At the same time, When the high level from pins 11 and 12 of phone 2 enters the photoelectric switch K2, it is transmitted to the subsequent stage, so that the base of the triode V2 is grounded through R26. At this time, the high level from the emitter of V2 supplies power to the relay J1 And make it into the working state and its A pin is separated from the C pin, connected with the D pin (through this process, CPU1 determines that the phone 2 is working), and at the same time, the B pin is connected with the Y pin, and then enters a high level to the thyristor CT1 , because the base of CT1 enters the high level from pin 13 of CPU (1), it is in a conduction state (the high level in the base of CT1 is canceled when J1 transmits power to pin 1 of the CPU1 circuit. After the high level from the thyristor CT1 reaches the 11th pin of the switch 14, the state of the switch 14 is changed. (The state before the change is: the 4th pin is connected to the 5th pin, and the 14th pin is connected to On the 12th pin, the 15th pin is connected to the 2nd pin. The state after the change is: the 4th pin is connected to the 3rd pin, the 14th pin is connected to the 13th pin, and the 15th pin is connected to the 1st pin) by Above-mentioned change, the signal of No. 2 circuit is by inductive transformer L1, L3, and the loudspeaker of telephone (2) is connected with the microphone induction of No. 3 circuit, and the microphone of telephone (2) is connected with the horn microphone induction of No. 3 circuit. Just like this, guest Can be connected with the homeowner outside. After contacting, if the homeowner hangs up the mobile phone, when the phone (2) is hung up, it will restore the original state. Meanwhile, the 11 and 12 pins of the phone (2) The output level becomes zero, and the photoelectric switch K2 connected to pins 11 and 12 of the phone (2) is disconnected, and then K2 stops the triode V2 from working, and then the relay J1 also stops working, and the thyristor CT1 also stops working. Open, as a result, the entire circuit returns to its original state.

Introduce below the utility model with the process of our used doorbell state type work in real life: it is mainly made up of No. 3 circuit, No. 9 circuit, switch 13,15 in the figure. Connection relationship: doorbell 3 and switch 15, switch 15 and switch 13, switch 13 and handle 9 two-way connection.

When pressing K17 in the No. 12 circuit, the doorbell 3 is connected with the telephone (2) and a sound comes out from the speaker B1 in the figure. Because this sound is different from the sound when the phone comes in, people at home can distinguish the two After the sound, it can be determined that someone is outside the door. At this time, if the people in the house pick up the handle 9 of the phone (2) (a switch controlled by the weight of the handle 9 is added in the phone (2)) an order is output to the switches 13, 15, as a result, the switch Device 13,15 makes No. 9 circuit connect with No. 3 circuit, just like this, the people at home can hear the voice of the people outside the door, and the people outside the door can hear the voice of the family. This brings into play the role of the doorbell we use in real life.

Note: No. 9 circuit is shared by No. 3 and No. 2 circuits.

Voice control to answer the phone function:

In the figure, it is composed of the voice recognition circuit composed of No. 8 circuit. Structure: It is composed of voice memory IS5 circuit, circuit IS7 for converting voice signal into audio signal, audio discrimination circuit IS6, CPU (1), telephone (2) and other circuits. The connection relation among them: the input end of IS6 is connected with the output end of IS7, the output end of telephone (2) is connected with the input end of No. (8) circuit.

The relationship between them:

First, the voices of several people (such as family members) are pre-recorded to IS5 in circuit No. 8 (such as "open", etc.). ), if those above-mentioned people (such as family members) do not pick up the handle (9) of the phone (2) and directly speak out the content entered in the IS5 circuit, they will be converted into audio signals in the IS7 circuit and enter IS6, Output a command from the IS6 circuit and play the pre-recorded content in the IS5 and transmit it to the IS6 circuit. Compared with the voice transmitted from the IS7 circuit, if there is the same, the command will be output from the IS6 circuit and enter the CPU (1 ), the CPU (1) gives an open command to the phone (2), and as a result the phone can be answered (equivalent to pressing the hands-free key). After talking, if the other side hangs up the phone, when the hang up sound is transmitted by the telecommunication network, the phone (2) just returns to the original state, and meanwhile the whole circuit also returns to the original state.

working principle;

After the telephone (2) in the figure calls, output the sound from its 14 pins, pass through the photoelectric switch K1, enter the base of the triode V5 and make the 5th pin of the IS6 circuit become low level, and the sound stops (two between rings), V5 is cut off, and pin 5 of the IS6 circuit becomes high level. To answer the other party’s call, do not pick up the handle of the phone, but directly say the content pre-recorded in the IS5 circuit, and the content will be displayed in the IS7 It becomes an audio signal in the circuit, enters the 7th pin of the audio discrimination circuit IS6, makes the 4th pin become low level, the level in the collector of the triode V18 comes out from the emitter, enters the photoelectric switch K6 and makes its back The level is in the conduction state, and at the same time, ground the PE pin of IS5, the content pre-recorded in IS5 is output from the SP+ pin, enters the second pin of the IS6 circuit, and compares it with the voice entering the seventh pin, if there is the same voice , output low level from the third pin, enter the 8th pin of the CPU (1), output high level from the 17th pin of the CPU (1), and enter the base of the triode V6, the level in the collector is from the emitter pole output, enter the photoelectric switch K4, and make its rear stage in conduction state, meanwhile, the 5th and 6 pins (the wire drawn from the hands-free key of the telephone (2)) of the telephone (2) are connected, open the telephone ( 2) After being connected with the other party's phone and finishing the conversation, if the other party hangs up the phone, the phone (2) will return to the original state after the hang-up sound, and meanwhile the whole circuit will also return to the original state.

Advantages of voice-activated answering calls:

The most prominent advantage is that it creates a very convenient communication environment for the handicapped and the inconvenient to walk in terms of telephone communication.

Phone line detection:

When the homeowner is away, when calling the home phone with his mobile phone, only let him ring once, and then hang up. After 10 seconds, the home phone will automatically dial the pre-fixed number (such as the homeowner's mobile phone number) , The homeowner knows whether the telephone line at home is unobstructed according to the phone call. Now, as long as he makes his mobile phone busy, the phone (2) at home will be restored to its original state when the hang-up sound comes. Using this function, you can also inquire about the voices of people in front of the house and talk to them.

working principle:

When the house owner is outside, dial the phone (phone 2 in the figure) at home and only let it ring once, then after just hanging up, when the phone (2) rang, the sound output from 14 pins passed through the photoelectric switch K1 (because K1 and The power supply is connected, so it can be transmitted) into the switch K11, the output enters the base of the triode V5, passes through K10, makes the 7th pin of the CPU (1) become low level, and after 8 seconds, from the CPU (1) The 7th pin of the Pin 17 outputs a high level, enters the base of the triode V6 and makes it enter the working state, outputs a high level from the emitter, enters the photoelectric switch K4, and the latter stage is turned on, making the fifth and sixth of the phone (2) Pin (the line drawn from the hands-free key of phone 2) is connected, at this moment, the phone (2) is just opened, and after 1 second, a high level is output from pin 18 of the CPU (1), and enters the base of the triode V7 And make it enter the working state, output high level from the emitter, enter the photoelectric switch K5, the latter stage is turned on and ground the PE pin of the IS4 circuit in the circuit No. 7 in the figure, and output the pre-input from the SP+ pin Dial the audio signal, enter the 8 pins of the telephone (2), and transmit it to the telephone network. As a result, the purpose of calling the homeowner is realized. The homeowner makes his mobile phone busy after knowing that the telephone line is unimpeded according to the incoming call, and hangs up. After the sound is transmitted from the telecommunication network, the phone (2) returns to its original state.

This function can only work if there is no reflection on pin 3 of IS6 in circuit 8.

Message function:

It is made up of main circuits such as voice memory AW1, switch (16), loudspeaker, microphone and button (12), and switch (K6).

The connection relationship between them:

The output end of the IS3 circuit is connected with the input end of the switch (16), the output end of the No. 16 circuit is connected with the input end of the No. 12 circuit, and the output end of the switch K6 is connected with V9 in the AW1 circuit and the input end of the No. 16 circuit .

More on this feature:

This function is suitable for wide application in institutions, marketing departments and families.

Under special circumstances such as not going to work or not at home, the above-mentioned departments can leave relevant information for others to inform.

This function and its function cannot be used at the same time. When using this function, first move K6 in the figure to S and connect A and C pins and Y and P pins. At this time, the voltage in Y pins is output from P pins, enters 11 pins of switch 16 and makes the voice The voice signal in the memory IS3 is transmitted to the speaker B2 in the No. 12 circuit.

Working process: When the K17 button is pressed, a low level comes out. This low level enters the base of the triode V9 through R24 and makes V9 enter the working state. After a high level comes out from the emitter, it enters the voltage regulator tube G2 And stabilized at 5V, when this 5v voltage supplies power to the US pin of IS3, the voice signal pre-input by the master comes out from its CP+ pin and passes through the switch 16, and then after being amplified in the transistor V8, it can be used in the circuit 12 Play out from the speaker B2. Press K17 until when, and when the above process is carried out. After stopping pressing K17, the whole circuit returns to its original state.

The input content and the capacity of the voice memory, we can use a large-capacity voice memory to increase the input content.

1. When the call is completed, the phone will automatically shut down when there is a hang-up sound from the telephone network.

2. If you can't get through to the other party, call repeatedly until you get through.

The following describes the various leads in the above figure:

No. 1 and No. 2 are drawn from the lead wire of the speaker in the handle. No. 3 and No. 4 are drawn from the lead wire of the microphone in the handle. Numbers 5 and 6 are triggered by the hands-free button. Number 7 is derived from the dial tone output line. Number 8 comes from the dial tone input. Numbers 9 and 10 are derived from a newly added switch controlled by the weight of the handle. When picking up the handle, No. 9 and No. 10 are connected to each other. Numbers 11 and 12 are drawn from both ends of the lamp. No. 13 and No. 14 are led out by the lead wire of the horn used when pressing the hands-free button. No. 15 and No. 16 are drawn by the lead wire of the microphone in the telephone case.

The method of inputting language in the circuit (6) is introduced below:

Disconnect K15, press and hold K20 and K14 in turn, and speak into the microphone to input language. Release K14 and K20 after inputting, and close K15.

Introduce the method for inputting dial tone in circuit (7) below:

First turn on the phone and input the number to be input (for example, the house owner's cell phone number) and turn off the phone, then press the hands-free key to turn on the phone, hold down K9 and press the redial key. After hearing the end of the dial tone (number redialing completed), let go of the K9 and press the hands-free key to turn it off. Dial tone can be stored in IS4 in circuit (7) by this process.

Functions of switches K10 and K11:

The function of detecting telephone lines cannot be used when the K10 is disconnected.

When the K11 is disconnected, the voice-activated answering call function cannot be used.

No. 10 circuit is, microphone and loudspeaker in the telephone circuit (2).

IS4 in circuit number (7). When the dial tone is being issued, the microphone MIC7 in circuit 10 does not work (circuit (2) has this function).

The integrated YI in the doorbell circuit (3) has the effect of sending a bell.

Claims (10)

1. be with the antitheft phone of doorbell, form by vibration acceptance-Wireless Transmitter, wireless signal receiver, CPU, telephone circuit, dialing tone memory, voice memory circuit, power circuit, interchanger, doorbell circuit, loudspeaker, microphone circuit, acoustic control boot-strap circuit, it is characterized in that, telephone circuit (2) and CPU (1), dialing tone memory (7), interchanger (13), interchanger (15), voice memory circuit (6), sound controling switch circuit (8) interconnect; By wireless connections between vibration acceptance-Wireless Transmitter (4) and the wireless signal receiver (5); CPU (1) and telephone circuit (2), dialing tone memory (7), sound controling switch circuit (8), loudspeaker, microphone circuit (12), voice memory circuit (6) interconnect; Doorbell circuit (3) interconnects with interchanger (15), loudspeaker, microphone circuit (12); Interchanger (16) interconnects with loudspeaker, microphone circuit (12), voice memory circuit AW1, interchanger (15); Interchanger (15), interchanger (13), interchanger (14) interconnect; The handle circuit (9) of telephone circuit (2) is connected with interchanger (13); The loudspeaker of passing on a message of telephone circuit (2), microphone (10) are connected with interchanger (14).

2. the antitheft phone of band doorbell as claimed in claim 1 is characterized in that, vibration acceptance-Wireless Transmitter (4), wireless signal receiver (5) are Wireless Transmitter and the wireless receivers that password is arranged.

3. the antitheft phone of band doorbell as claimed in claim 1 is characterized in that, CPU adopts single-chip microcomputer PIC16C54.

4. the antitheft phone of band doorbell as claimed in claim 1 is characterized in that, telephone circuit (2) adopts the landline telephone circuit.

5. the antitheft phone of band doorbell as claimed in claim 1 is characterized in that, dialing tone memory (7) adopts ISD1810 chip or landline telephone CPU.

6. the antitheft phone of band doorbell as claimed in claim 1 is characterized in that, the voice memory circuit adopts the ISD1810 chip.

7. the antitheft phone of band doorbell as claimed in claim 1 is characterized in that, interchanger adopts integrated circuit 4053.

8. the antitheft phone of band doorbell as claimed in claim 1 is characterized in that, doorbell circuit is formed by the integrated circuit that sends the tinkle of bells with the circuit that voice signal converts audio signal to.

9. the antitheft phone of band doorbell as claimed in claim 1 is characterized in that, loudspeaker, microphone circuit are made up of loudspeaker, microphone, button.

10. the antitheft phone of band doorbell as claimed in claim 1 is characterized in that, sound controling switch circuit is formed by single-chip microcomputer PIC12C50X, ISD1818 chip with the circuit that voice signal converts audio signal to.