CN2455009Y

CN2455009Y - Detection instrument for preventing from fraudulent use of telephone

Info

Publication number: CN2455009Y
Application number: CN 00257129
Authority: CN
Inventors: 李全用; 阎磊; 赵砚青
Original assignee: ZIBO COMMUNICATION ELECTRIC APPLIANCE CO
Current assignee: Shandong Senter Electronic Co Ltd
Priority date: 2000-12-21
Filing date: 2000-12-21
Publication date: 2001-10-17
Anticipated expiration: 2010-12-21

Abstract

The utility model belongs to the field of telephone communication equipment and devices. The utility model is characterized in that a digital sound recording and playing circuit and a DTMF receiving / sending circuit are connected between a family-entering interface and a telephone interface; the digital sound recording and playing circuit is connected with a family-entering interface circuit in parallel; the DTMF receiving / sending circuit through a change-over switch is connected in a telephone line in parallel; the digital sound recording and playing circuit, a ranging circuit, the DTMF receiving / sending circuit and a communication nature judge circuit are connected with an I/O interface of a CPU of a single chip machine. The utility model can distinguish legal and illegal users, records call information, records contents and take evidences for fraudulent use of a telephone, sends out warning message in time, can automatically determine a fraudulent use position for disconnection fraudulent use, and achieves the purpose of effectively taking evidences.

Description

The fraudulent use of telephone detecting instrument

The utility model belongs to telephone communication set and device field, relates generally to a kind of fraudulent use of telephone detecting instrument that writes down called user information and have warning function.

The instrument of existing anti-fraudulent use of telephone has a variety of, interference tones occurs or make DTMF (dual-tone multifrequency) signal do not accepted to avoid circuit by free call on sb. else's expense through illegal means in the circuit when way of the passive interference of employing makes phone by free call on sb. else's expense through illegal means mostly by switch, as notification number is the described method of utility model patent of CN_2226356Y (patent No. is 94231131.0), though this method can avoid phone by free call on sb. else's expense through illegal means, but can't write down free call on sb. else's expense through illegal means information, grasp the evidence of its free call on somebody else's expense through illegal means; Also have and adopt the method that is connected with common recorder to record, be as described in the utility model patent of CN_2270323Y (patent No. is 96220076.X) as notification number, though this method can write down the free call on sb. else's expense through illegal means voice messaging, but can not write down the telephone number and the time of free call on sb. else's expense through illegal means, and need external other auxiliary equipment, use inconvenient.

The purpose of this utility model provides a kind ofly can distinguish validated user and disabled user, the information of dialing on the headphone line, and automatically to free call on somebody else's expense through illegal means content recording evidence obtaining, in time warning message is sent by telephone wire then; For broken string free call on sb. else's expense through illegal means situation, can finish range finding automatically, determine the free call on sb. else's expense through illegal means position, to reach the fraudulent use of telephone detecting instrument of effective evidence obtaining purpose.

In order to achieve the above object, the utility model provides a kind of fraudulent use of telephone detecting instrument, comprise the interface of registering one's residence, subsets interface, single chip circuit and conversation property determination circuit, it is characterized in that: registering one's residence connects digital recording and playing circuit, DTMF receipts/Power Generation Road between interface and the telephone interface; The digital sound recording circuit is connected to the interface circuit of registering one's residence; DTMF receipts/Power Generation Road is concatenated in the telephone line by the interface of registering one's residence; Digital sound recording circuit, DTMF receipts/Power Generation Road are connected with the I/O interface circuit of single-chip microcomputer CUP.

Be connected with the broken string range-measuring circuit between the I/O interface of described register one's residence interface and singlechip CPU, the broken string range-measuring circuit is connected on the interface of registering one's residence through change over switch.

Described digital sound recording circuit is connected to the interface circuit of registering one's residence through change over switch.

Described DTMF receipts/Power Generation Road is by registering one's residence interface and receiving in the telephone line.

Described digital sound recording circuit is made up of record, playback chip and accessory circuit.

The end of the described interface P1 that registers one's residence is connected with a pin of utmost point pipe D2 negative pole, D5 positive pole, optocoupler components GD01, the k pin of optocoupler components GD02, an input 1 of relay J 1 with 5 ends through 4 of relay J 2, and the other end of P1 is connected with 2 ends of the end of 2 ends and telephone interface P2, diode D3 negative pole, D4 positive pole, relay J 1 through 1 of relay J 2; The other end of telephone interface P2 is connected with the k pin of optocoupler components GD01 and a pin of optocoupler components GD02; The c pin of optocoupler components GD01 and GD02 is connected with the IN1 end of an end of resistance R 15 and singlechip CPU; The e pin ground connection of optocoupler components GD01, GD02; The other end of resistance R 15 is connected with power Vcc; The plus earth of diode D2, D3; The negative pole of diode D4, D5 is connected with the end of resistance R 5, R18, R24, an end of capacitor C 12 and the e utmost point of triode N4; The other end of resistance R 18 is connected with the negative pole of voltage stabilizing didoe Z1, and the positive pole of voltage stabilizing didoe Z1 is connected with an end of resistance R 23, the b utmost point of triode N7, and the other end of resistance R 23 is connected and ground connection with the other end of resistance R 24 and the e utmost point of triode N7; The c utmost point of N7 is connected with the IN2 end of an end of resistance R 19 and singlechip CPU, and the other end of resistance R 19 is connected with power Vcc; The b utmost point of triode N1 is connected with the IN4 end of singlechip CPU through resistance R 2, the e utmost point ground connection of N1, and the c utmost point of N1 is connected with an end of the coil of the positive pole of diode D1, relay J 1, and the other end of the coil of the negative pole of diode D1, relay J 1 is connected with power Vcc; 3 of relay J 1 is connected with 16,17 pins of ic chip 2 through capacitor C 15, C16 respectively with 4 ends, 13 pins of IC2 are connected with the positive pole of electric capacity E1, the negative pole of electric capacity E1 is connected with the end of loudspeaker SP1, an end of

resistance R

25,4,11,12,23, the 26 pin ground connection of IC2,18, the end of 27 pins and+3V power end and capacitor C 3, C4 is connected, the other end ground connection of capacitor C 3, C4,1,2,3,28 pins of IC2 connect 21,22,23,24 pins of singlechip CPU respectively, the other end ground connection of loudspeaker SP1, all the other pins of IC2 are all unsettled;

The b utmost point of triode N9 is connected with the IN9 end of singlechip CPU through resistance R 34, the e utmost point ground connection of N9, the c utmost point of N9 is connected with an end of the coil of the positive pole of diode D6, relay J 2, and the other end of the coil of the negative pole of diode D6, relay J 2 is connected with power Vcc; 3 of relay J 2 is connected with the input of FD circuit respectively with 6 ends, and the output of FD circuit is connected with IN8, the IN10 end of singlechip CPU respectively;

The other end of capacitor C 12 is connected with 2 pins of ic chip 1 and an end of resistance R 13 through resistance R 12, the other end of resistance R 13 is connected with 3 pins of

ic chip

1,1 of IC1,4 pin short circuits, 8 pins and resistance R 6, R14, one end of capacitor C 2 connects, resistance R 14, the other end ground connection of

capacitor C

2,18 pins of IC1 are connected through the end of resistance R 11 with 19 pins and capacitor C 11, the other end of capacitor C 11 together is connected with power Vcc with an end of capacitor C 13 and 20 pins of IC1, the 5 pin common grounds of the other end of capacitor C 13 and IC1,9 to 17 pins of IC1 connect 7 of singlechip CPU respectively, 25,26,27,28,36,37,38,39 pins, all the other pins of IC1 are all unsettled;

The other end of resistance R 6 is connected with an end of resistance R 3 and the b utmost point of triode N8 through capacitor C 14, the c utmost point of triode N8 is connected with the c utmost point, resistance R 1, an end of capacitor C 1 and the other end of resistance R 25 of the other end of resistance R 3, triode N2, N4, the e utmost point of triode N8 is connected with the b utmost point of N2, the e utmost point of N2 is through resistance R 20 ground connection, the other end ground connection of resistance R 1, capacitor C 1, the b utmost point of triode N3 is connected with the IN5 end of singlechip CPU through resistance R 21, the e utmost point ground connection of N3, the c utmost point is connected with the other end of resistance R 5 and the b utmost point of triode N4 through resistance R 4.

The utility model compared with prior art has:

1. sound when free call on sb. else's expense through illegal means takes place date, time and the telephone number that cries of dialling of alarm and headphone free call on sb. else's expense through illegal means.

2. can record automatically to the free call on somebody else's expense through illegal means content, dial by circuit then and be default phone, in time warning message be sent.

3. for broken string free call on sb. else's expense through illegal means situation, can according to the length that the appearance value standard and the circuit measured value of telecommunication cable are judged cable, measure the breakpoint distance automatically, determine the free call on sb. else's expense through illegal means position by measuring the capacitance in the circuit.

4. whole installation cost is low, and integrated degree is higher, working stability, and the reliability height is applicable to the user of various switches.

Below in conjunction with drawings and Examples the utility model is further elaborated:

Fig. 1 is a circuit frame principle figure of the present utility model.

Fig. 2 is the circuit theory diagrams of the utility model embodiment.

Among Fig. 1, the utility model comprises the interface 1 of registering one's residence, subsets interface 2, DTMF receipts/Power Generation Road 3, broken string range-measuring circuit 4, digital sound recording circuit 5, conversation property determination circuit 6, singlechip CPU circuit 7 and change over

switch

8,9; Register one's residence and connect DTMF receipts/Power Generation Road 3, broken string range-measuring circuit 4, digital sound recording circuit 5 and conversation property determination circuit 6 between interface 1 and the telephone interface 2; DTMF receipts/Power Generation Road 3, broken string range-measuring circuit 4 are by change over switch 8 and receive in the telephone line; Digital sound recording circuit 5 is connected to the interface circuit of registering one's residence by change over

switch

8 and 9; Conversation property determination circuit 6 is serially connected with by change over switch 8 registers one's residence between interface 1 and the telephone interface 2; DTMF receipts/Power Generation Road 3, broken string range-measuring circuit 4, digital sound recording circuit 5, conversation property determination circuit 6 are connected with control line through data wire with the I/O interface circuit of single-chip microcomputer CUP circuit 7.

Digital sound recording circuit 3 is made up of record, playback chip and accessory circuit.

Among Fig. 2, the utility model comprises the interface P1 that registers one's residence, telephone interface P2, singlechip CPU, by diode D2, D3, D4, the polar protective circuit that D5 forms, by optocoupler components GD01, GD02, resistance R 15, R18, R19, R23, R24, voltage stabilizing didoe Z1, the conversation property determination circuit that triode N7 forms, conversation property determination circuit output end IN1, the IN1 of IN2 and singlechip CPU, IN2 holds connection, be connected with by triode N1 between interface P1 and the telephone interface P2 registering one's residence, resistance R 2, R25, diode D1, relay J 1, capacitor C 3, C4, C15, C16, E1, the digital sound recording circuit that loudspeaker SP1 and integrated circuit (IC) 2 are formed, by triode N9, resistance R 34, diode D6,1 of

relay J

2,3,4, the broken string range-measuring circuit that 6 ends and circuit FD form, by resistance R 1, R3, R4, R5, R6, R11, R12, R13, R14, R20, R21, capacitor C 1, C2, C11, C12, C13, C14, triode N2, N3, N4, N8, DTMF receipts/the Power Generation Road that ic chip 1 and crystal oscillator element XTAL1 form, the digital recording circuit is connected to registers one's residence between interface P1 and the telephone interface P2; DTMF receipts/Power Generation Road is connected in the telephone line by the polar protective circuit of being made up of diode D2, D3, D4, D5; Digital sound recording circuit, DTMF receipts/Power Generation Road are connected with the I/O interface circuit of single-chip microcomputer CUP circuit.

Described broken string range-measuring circuit FD is connected to through normally opened

contact

3,6 ends of relay J 2 and registers one's residence between interface P1 and the subsets interface P2.

Described digital sound recording circuit is connected to through 1,2,3 and 4 ends of relay J 1 and registers one's residence between interface P1 and the telephone interface P2.

The operation principle of entire circuit:

The end of C12 links to each other as the input of DTMF receipts/Power Generation Road with the tie point of D4, D5, and the emitter of N4 links to each other as the output of DTMF receipts/Power Generation Road with the tie point of D4, D5; Audio frequency or pulse signal are imported IC1 by C12, R12, R13, by CPU control decoding; Whether the 8th jiao of output dtmf signal of IC1 is sent in the telephone line by IN5 control dtmf signal by CPU.

When the validated user off-hook, voltage reduces in the telephone line, among optocoupler components DG01 or the GD02 electric current is arranged, IN2 end output high level, IN1 holds output low level, and CPU is judged as legal use, the ticketed call date and time, indication DTMF receipts/Power Generation Road is decoded and record to the audio frequency/pulse signal in the circuit, behind the end of conversation, and the ticketed call duration.When free call on sb. else's expense through illegal means takes place when, voltage reduces in the telephone line, and there is not electric current among optocoupler components DG01 or the GD02, so IN2 end output high level, IN1 end output high level, after CPU is judged as free call on sb. else's expense through illegal means, instruction speech chip and loud speaker SP1 send chimes of doom and record date and time, indicate DTMF receipts/Power Generation Road that the audio frequency/pulse signal in the circuit is decoded then, after decoding was finished and write down, CPU made IN4 end output low level, two groups of normally opened contacts of attracting electric relay J1,1 and 3,2 of relay J 1 is connected with 4 ends, begins recording; After free call on sb. else's expense through illegal means finishes, the ticketed call duration.If be judged to be after the free call on sb. else's expense through illegal means and do not have dtmf signal in the circuit in 30 seconds, then think the free call on sb. else's expense through illegal means of breaking, CPU makes two groups of normally opened contact adhesives of relay J 2 by IN9,1 and 3,4 of relay J 2 is connected with 6 ends, normally opened contact by relay J 2 makes circuit be connected with appearance pH-value determination pH circuit, by the capacitance that holds pH-value determination pH circuit test circuit, judge the distance of broken string thus, and record.Dial with the control of IN5 end by the 9th to 17 pin of CPU by IC1 and to be preset phone number, put through the alarm voice information that the automatic broadcast in back presets; CPU plays the free call on sb. else's expense through illegal means dialog context recording of respective record when needing playback by the 1st, 2,3, the 28 pin control IC 2 of IC2.

The component parameters that uses among the embodiment is:

E1:1 μ f-470 μ f; C1, C2, C3, C4, C11, C12, C13, C14, C15, C16:103 μ f-474 μ f; R1, R20:1 Ω-33K Ω; R3, R11:10K Ω-10M Ω; R2, R4, R5, R6R12, R14, R15, R21, R25, R34:1K Ω-100K Ω; R13, R19:10K Ω-1M Ω; R18, R23, R24:100K Ω-10M Ω; GD01, GD02:TCP52X-X series; D1-D6:1N4000 series; Z1:2ZP series; N4:PNP series triode; N1, N2, N3, N7, N8, N9:NPN type triode; IC1:DTMF sends/accepts chip; The IC2:ISD family chip; CUP:8 position singlechip chip; SP1: external magnetic type loudspeaker; J1, J2:DC5V relay; XTAL1:0.1-32MHz.

By use of the present utility model, can distinguish validated user and disabled user, the information of dialing on the headphone line, and automatically to free call on somebody else's expense through illegal means content recording evidence obtaining, in time warning message is sent by telephone wire then; For broken string free call on sb. else's expense through illegal means situation, can finish range finding automatically, determine the free call on sb. else's expense through illegal means position, to reach the purpose of effective evidence obtaining.

Claims

1. a fraudulent use of telephone detecting instrument comprises the interface of registering one's residence, subsets interface, single chip circuit and conversation property determination circuit, it is characterized in that: registering one's residence connects digital recording and playing circuit, DTMF receipts/Power Generation Road between interface and the telephone interface; The digital sound recording circuit is connected to the interface circuit of registering one's residence; DTMF receipts/Power Generation Road is concatenated in the telephone line by the interface of registering one's residence; Digital sound recording circuit, DTMF receipts/Power Generation Road are connected with the I/O interface circuit of single-chip microcomputer CUP.

2. according to the described fraudulent use of telephone detecting instrument of claim 1, it is characterized in that being connected with the broken string range-measuring circuit between the I/O interface of interface and singlechip CPU of registering one's residence, the broken string range-measuring circuit is connected on the interface of registering one's residence through change over switch.

3. according to the described fraudulent use of telephone detecting instrument of claim 1, it is characterized in that the digital sound recording circuit is connected to the interface circuit of registering one's residence through change over switch.

4. according to the described fraudulent use of telephone detecting instrument of claim 1, it is characterized in that DTMF receipts/Power Generation Road is concatenated in the telephone line by the interface of registering one's residence.

5. according to the described fraudulent use of telephone detecting instrument of claim 1, it is characterized in that the digital sound recording circuit is made up of record, playback chip and accessory circuit.

6. according to the described fraudulent use of telephone detecting instrument of claim 1, the end of interface P1 of it is characterized in that registering one's residence is connected with a pin of utmost point pipe D2 negative pole, D5 positive pole, optocoupler components GD01, the k pin of optocoupler components GD02,1 end of relay J 1 with 5 ends through 4 of relay J 2, and the other end of P1 is connected with 2 ends of the end of 2 ends and telephone interface P2, diode D3 negative pole, D4 positive pole, relay J 1 through 1 of relay J 2; The other end of telephone interface P2 is connected with the k pin of optocoupler components GD01 and a pin of optocoupler components GD02; The c pin of optocoupler components GD01 and GD02 is connected with the IN1 end of an end of resistance R 15 and singlechip CPU; The e pin ground connection of optocoupler components GD01, GD02; The other end of resistance R 15 is connected with power Vcc; The plus earth of diode D2, D3; The negative pole of diode D4, D5 is connected with the end of resistance R 5, R18, R24, an end of capacitor C 12 and the e utmost point of triode N4; The other end of resistance R 18 is connected with the negative pole of voltage stabilizing didoe Z1, and the positive pole of voltage stabilizing didoe Z1 is connected with an end of resistance R 23, the b utmost point of triode N7, and the other end of resistance R 23 is connected and ground connection with the other end of resistance R 24 and the e utmost point of triode N7; The c utmost point of N7 is connected with the IN2 end of an end of resistance R 19 and singlechip CPU, and the other end of resistance R 19 is connected with power Vcc; The b utmost point of triode N1 is connected with the IN4 end of singlechip CPU through resistance R 2, the e utmost point ground connection of N1, and the c utmost point of N1 is connected with an end of the coil of the positive pole of diode D1, relay J 1, and the other end of the coil of the negative pole of diode D1, relay J 1 is connected with power Vcc; 3 of relay J 1 is connected with 16,17 pins of ic chip 2 through capacitor C 15, C16 respectively with 4 ends, 13 pins of IC2 are connected with the positive pole of electric capacity E1, the negative pole of electric capacity E1 is connected with the end of loudspeaker SP1, an end of resistance R 25,4,11,12,23, the 26 pin ground connection of IC2,18, the end of 27 pins and+3V power end and capacitor C 3, C4 is connected, the other end ground connection of capacitor C 3, C4,1,2,3,28 pins of IC2 connect 21,22,23,24 pins of singlechip CPU respectively, the other end ground connection of loudspeaker SP1, all the other pins of IC2 are all unsettled;

The b utmost point of triode N9 is connected with the IN9 end of singlechip CPU through resistance R 34, the e utmost point ground connection of N9, the c utmost point of N9 is connected with an end of the coil of the positive pole of diode D6, relay J 2, and the other end of the coil of the negative pole of diode D6, relay J 2 is connected with power Vcc; 3 of relay J 2 is connected with the input of FD circuit respectively with 6 ends, and the output of FD circuit is connected with IN8, the 1N10 end of singlechip CPU respectively;

The other end of capacitor C 12 is connected with 2 pins of ic chip 1 and an end of resistance R 13 through resistance R 12, the other end of resistance R 13 is connected with 3 pins of ic chip 1,1 of IC1,4 pin short circuits, 8 pins and resistance R 6, R14, one end of capacitor C 2 connects, resistance R 14, the other end ground connection of capacitor C 2,18 pins of IC1 are connected through the end of resistance R 11 with 19 pins and capacitor C 11, the other end of capacitor C 11 together is connected with power Vcc with an end of capacitor C 13 and 20 pins of IC1, the 5 pin common grounds of the other end of capacitor C 13 and IC1,9 to 17 pins of IC1 connect 7 of singlechip CPU respectively, 25,26,27,28,36,37,38,39 pins, all the other pins of IC1 are all unsettled;