CN1186404A - Remote telephone coding lock - Google Patents

Abstract

A remote-controlled cipher lock for telephone is composed of remote-control cipher transmitter and cipher receiving and lock control device. Said transmitter consists of cipher generator, digital code input unit, modulator and transmitter unit. Said lock control device comprises cipher receiver, telephone set interface, dialing receiver, number storage recognizer, controller and monitor for illegal parallel connection of telephone sets. With remote control technique, unauthorized dialing of long-distance and special services can be prevented. Its advantages are easy and quick operation, no need of memorizing cipher, high security, and simple circuit structure.

Description

Remote telephone coding lock

The present invention relates to a kind of corollary apparatus of telephone set, exactly, relate to a kind of telephone wire that prevents by illegal parallel operation, perhaps have no right the user to dial a kind of control device of the extraordinary Service Phone of toll telephone or city, belong to the calling that prevents in the telephone set without permission or the control device of fraudulent call.

Along with closing on of information-intensive society, the installation of phone and use are popularized day by day.Yet, illegally usurp other people telephone line fraudulently phone, and the phenomenon of utilizing WorkPhone to dial the world, national distance or extraordinary Service Phone taking place often, some places remain serious, and make this user's telephone charges high, are difficult to solve.So people have developed various telephone lock devices, usurp problem to solve phone.Though the telephone lock of these machineries, electronics or Electromechanical Control can play certain control action, but there is following point: the coded lock that has, the setting of its password, modification, unlocking cipher and limit are dialed the number and are all sent into by the phone button, operation sequence is loaded down with trivial details bothersome, both made the people feel that operating difficulties uses inconvenience, utilize the keyboard random experiment " to catch " password unlocking to the unprincipled fellow again condition is provided, and the probability of " success " also is not low, makes this coded lock lose the control limit and dials function.Moreover, with phone keyboard input password the time easily by around " having the inclination " people surreptitiously see to steal and remember and give away secrets.If in a single day the user forgets the password that oneself is set, the predicament that oneself can not unblank to make a phone call will take place.Must dial password by first off-hook when the coded lock that also has uses, called number is dialed in on-hook more then, and is very inconvenient.The coded lock that also has is when dialing dail-limiting number, and the lock control circuit will be hung up the several seconds voluntarily, send dialing tone to caller, both wastes time, and is when taking the switch machine again, very unreasonable.

The purpose of this invention is to provide a kind of remote telephone coding lock that can overcome all drawbacks of above-mentioned existing telephone lock, this device does not need button to input password one by one when using, so do not need back of the body note password, and send into password unlocking with remote controller, do not have the anxiety of divulging a secret, and easy to use, safe and reliable.

Another object of the present invention provides a kind of telephone lock implementation method of utilizing the wireless remote control emission to receive unlocking cipher and dail-limiting number.

The present invention is achieved in that and includes remote control password emitter and password reception lock control devices, it is characterized in that: above-mentioned remote control password emitter is made up of cipher code generator, digital loader, modulator and reflector, and above-mentioned password receives lock control devices and is made up of password receiver, telephone interface device, PB receiver, number storage identifier, controller and illegal parallel operation monitor.

The remote signal of above-mentioned remote control password emitter emission can be infrared, ultrasonic or microwave signal.

Above-mentioned password receives the unlocking cipher and the limit of lock control devices and dials the number, and can revise or reset with the dial key input of remote-controlled launcher and telephone set.

Maximum characteristics of the present invention are that wireless remote control technology and coding techniques are incorporated into the telephone set field that locks, and prevent to have no right that the user surreptitiously makes a long-distance call or extraordinary Service Phone.Because limit is dialed the number and password all is to pre-deposit remote control password emitter and password reception lock control devices, only need during use to power up to remote control transmitter, just relevant password emission can be sent and unblank, simple to operate, rapid, the back of the body is not remembered password, also needn't push keyboard input password, be particularly suitable for family, office's use.Cryptosecurity fail safe of the present invention is good, receive the lock control devices part and can be contained in the telephone set, constitute novel telephone set, also can make separate part with lock control function, be serially connected in the outside line of telephone set or with telephone set mutually and connect, be used with remote control password emitter.Circuit structure of the present invention is simple, easy to install, be convenient to promote the use of.

Fig. 1 is the structure composition frame chart of the cipher remote control emitter among the present invention.

Fig. 2 is the structure composition frame chart that the password among the present invention receives lock control devices.

Referring to Fig. 1, Fig. 2, the present invention receives lock control devices 2 two parts by cipher remote control emitter 1 and password and constitutes, wherein password reception lock control devices 2 can be serially connected in outside line L1, the L2 with telephone set, also can with telephone set mutually and connect the back and insert outside line, it is different that its difference is that password receives the wiring of the telephone interface device in the lock control devices.Cipher remote control emitter 1 is a self-contained unit, and its control circuit is made up of cipher code generator 11, digital loader 12, modulator 13, reflector 14 and power supply 15.Wherein cipher code generator adopts multiple access multidigit coding, and its address code and numeric data code can be selected 2～12 and 2～4 respectively, and coded number can be from tens, several ten thousand and even millions of.Can guarantee thus that password is difficult for being decrypted steals, and can produce in enormous quantities, does not have repeated code.Digital loader is used to send into 1～10 phone DIP number, and modulator and reflector then are used for code signal, DIP signal are modulated to the high frequency wireless transmission.This high-frequency carrier signal can be infrared, ultrasonic, also can be microwave.

Password receives 2 of lock control devices and is made up of password receiver 21, telephone interface device 22, PB receiver 23, number storage identifier 24, controller 25 and illegal parallel operation monitor 26.Wherein password receiver 21 mainly includes frequency-selecting resonance and receives, amplifies circuit such as shaping and decoding, it is infrared, the ultrasonic or microwave signal that receiving and transmitting unit sends that its frequency-selecting resonance receives, amplify shaping again and send into decoding circuit unscramble signal or telephone number, and the dialed digit or the unlocking cipher that decode sent into number storage identifier 24 and controller 25 respectively, so that open telephone lock.22 of telephone interface devices are made up of commutating circuit, switching circuit, signal extraction and power circuit, and its function mainly is the switching of control telephone set outside line, so that finish the connection and the cut-out of phone and outside line, and the supply of the power supply of receiving control device.PB receiver 23 mainly formed frequently by double-tone by receiving circuit, pulse receiving circuit, amplifying circuit and decoding circuit.Its function mainly is the telephone number that receives double-tone frequency or pulse dialing, handles through amplification, detection, decoding to become digital signal, sends into 24 storages of number storage identifier.The function of this identifier 24 is storage dail-limiting numbers, and telephone set telephone number of dialing and the dail-limiting number of having stored are compared, and dail-limiting number sends signal then for controller 25 in this way, locks to telephone set.25 of controllers are made up of logic analysis circuit, holding circuit, multivalued circuit, executive circuit, its function is unblanking of sending here of receiving number storage recognition device 24 or password receiver 21 or shuts order, telephone number input command, relatively controls related circuit through logic analysis and finishes limit and dial, unblank or function such as number storing.26 of illegal parallel operation monitors are made up of level detecting circuit, control circuit, switching circuit and warning circuit.Its major function is that the level signal in the monitoring outside line has no change, as finding illegal off-hook is arranged, and then sends control signal, stops its dialing to give outside line when reporting to the police, and warning circuit is then closed in dialing as this machine.

The course of work of the present invention is: the password receiving control device is connected in series with telephone set is connected in the outside line, when the electrophone of taking telephone set, this phone and outside line constitute path, and the power circuit in the telephony interface device of the present invention obtains voltage and also supplies with each parts.When calling then, the dialing receiving circuit receives with the dialing of audio frequency or pulse signal by the circuit interface device and converts digital signal to, send into storage of number storage identifier and comparison, usually only need relatively front three number, if the trunk code of special service number (as 168,160) that limit is dialled or the beginning of 0 word, this circuit will be sent a control command and give controller, make it to turn-off telephone set by the telephony interface device, continuing dials just to send does not go out, and keeps this state always.Only put down after the electrophone, off-hook just can carry out new call again.As desire to dial and limit when dialing, only after mentioning telephone handle (off-hook), open the switch of cipher remote control emitter 1, this emitter will be launched password, is received lock control devices by password and receives, after amplification, shaping decoding processing, if it is identical with the password that receiving system is provided with to organize password, then controller just sends unlock command, cancels limit and dials, and allows the telephone number of transfering to later be sent to outside line.In addition, illegally incorporate phone into as outside line, when calling, illegal parallel operation monitor 26 of the present invention will be found the undesired variation of level and notification controller sends control signal, and the parallel operation dialing can not be sent, and plays the illegal parallel operation effect that prevents.

Lock control devices password and limit among the present invention are dialed the number, and except in advance setting in the lock control devices, can also revise or reset with the dial key input of remote control password emitter or telephone set, to make things convenient for the user.

Claims (4)

1. remote telephone coding lock, it is characterized in that: its method that adds lock control utilizes wireless remote control to transmit and receive unlocking cipher and dail-limiting number is realized.

2. remote telephone coding lock, include remote control password emitter and password and receive lock control devices, it is characterized in that: above-mentioned remote control password emitter is made up of cipher code generator, digital loader, modulator and reflector, and above-mentioned password receives lock control devices and is made up of password receiver, telephone interface device, PB receiver, number storage identifier, controller and illegal parallel operation monitor.

3. remote telephone coding lock as claimed in claim 2 is characterized in that: the remote signal of above-mentioned remote control password emitter emission can be infrared, ultrasonic or microwave signal.

4. remote telephone coding lock as claimed in claim 2 is characterized in that: above-mentioned password receives the unlocking cipher and the limit of lock control devices and dials the number, and can revise or reset with the dial key input of remote-controlled launcher and telephone set.

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