CN2200262Y - Theft-proof protector for telephone line - Google Patents
Theft-proof protector for telephone line Download PDFInfo
- Publication number
- CN2200262Y CN2200262Y CN 94209917 CN94209917U CN2200262Y CN 2200262 Y CN2200262 Y CN 2200262Y CN 94209917 CN94209917 CN 94209917 CN 94209917 U CN94209917 U CN 94209917U CN 2200262 Y CN2200262 Y CN 2200262Y
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- CN
- China
- Prior art keywords
- circuit
- resistance
- output
- gate
- protector
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a protector which can prevent a telephone line not permitted to use, which is composed of an unlawfully used supervisory circuit, a gate circuit, a light alarm circuit, a sound alarm circuit, an automatic dialing circuit, a lawfully used supervisory circuit and a wire breaking and consumption descending circuit. The protector automatically complete the alarm protection action on the unlawfully used telephone line. The protection range is bigger than 3 kilometers. The protector has small size, and low cost. Moreover, the protector has no adverse effect on an SPC exchange, a telephone line, a subscriber telephone and speech quality.
Description
The utility model relates to a kind of protector that prevents to use without permission telephone line that has.
Documents, publication number " 2083814U " is a kind of alarm that prevents from illegally to insert phone, it is made up of voltage automatic reversing circuit, voltage decision circuitry, sense of current decision circuitry, warning power on-off control circuit and sound light alarming circuit.This apparatus structure complexity only has the warning function when illegally inserting phone, and can not stop the defencive function that uses telephone line without permission effectively.
The purpose of this utility model is to provide a kind of telephone line the anti-protector of usurping.If someone is attempted by phone on the subscriber's telephone line privately, as long as pick up a receiver, this protector will send signal automatically, stops illegally to use, and sends sound and light alarm.
The utility model also has a kind of broken string consumption reduction function, when disconnection fault takes place, can cut off warning circuit and automatic dial-up circuit power supply automatically, makes battery E be in low energy consumption state.
The purpose of this utility model is achieved in that this protector is made up of illegal use observation circuit, gate circuit, broken string consumption reduction circuit, legal use observation circuit, sound alarm circuit, optical alarm circuit and automatic dial-up circuit; The illegal observation circuit that uses is attempted by outer circuit A, between the B line, the output of illegal use observation circuit connects the input of gate circuit, the output one tunnel of gate circuit connects the input of sound alarm circuit, another road output of gate circuit connects the input of optical alarm circuit, one tunnel output of optical alarm circuit connects automatic dial-up circuit, another road output of optical alarm circuit connects the input of broken string consumption reduction circuit, the output of broken string consumption reduction circuit connects the input of illegal use observation circuit, legal use observation circuit is serially connected in A, between the C line, the output of legal use observation circuit connects the input of gate circuit, and optical alarm circuit is by multivibrator, drive circuit and light-emitting component are formed.
Good effect of the present utility model is: warning, protection action to illegal use telephone line are finished automatically, and protection range is greater than 3 kilometers, and volume is little, and cost is low.And stored-program control exchange, telephone line, subscriber phone and speech quality are all had no adverse effects.
With the accompanying drawing is that embodiment is further described the utility model.
Fig. 1 is a structured flowchart of the present utility model.
Fig. 2 is a circuit diagram of the present utility model.
The illegal observation circuit that uses is made up of diode D1-D4, resistance R 1, R2, capacitor C 1 and NAND gate IC1-IC3.Diode D1-D4 constitutes full-wave rectification, illegally uses observation circuit by detecting the change in voltage on the resistance R 2, differentiates the state whether illegal use telephone line is arranged, and finishes control to subordinate by IC1-IC3.
Legal use observation circuit is made up of photocoupler GW, resistance R 4, R12, diode D5, capacitor C 3, C4 and battery E.Whether photocoupler GW uses phone to differentiate to the user, and the control to next stage is finished in its output.
Automatic dial-up circuit is made up of dialing integrated circuit (IC) 10, triode T2 and resistance R 10.T2 and R10 constitute drive circuit.
Broken string consumption reduction circuit is made up of diode D6, capacitor C 2 and resistance R 3.
Gate circuit is made up of NAND gate IC4, IC5.
The multivibrator of optical alarm circuit is made up of NAND gate IC6, IC7 and peripheral resistance R 5, R6.Drive circuit is made up of triode T1, resistance R 7-R9 and NAND gate IC8.Light-emitting component is LED.
Sound alarm circuit is made up of triode T3, resistance R 11, capacitor C 6, voltage stabilizing didoe W and language chip IC9.The conducting of triode T3 or whether pronounce by control language chip IC 9.
With operating state protector is analyzed below.
As shown in Figure 2: A, the outer circuit of B termination, C, D termination subsets.
1, inactive state does not promptly have illegal the use and does not have when normally using telephone line yet.Introduce the full-wave rectification of outer circuit voltage (48V-60V) by A, B end through diode D1-D4; be added in resistance R 1, R2 two ends; partial pressure value on the R2 is a high level; make that through NAND gate IC1-IC5, IC7, IC8 the ground level of triode T1, T3 is that electronegative potential ends, and makes protector be in wait state.
2, illegal user mode is when having the people illegally to insert telephone set and use (picking up a receiver) on the promptly outer circuit.The voltage that is added in resistance R 1, R2 two ends is (6V-10V), and the partial pressure value on the R2 is a low level, through NAND gate IC1-IC5, make IC5 be output as high level, the output one tunnel of IC5 makes triode T3 conducting through resistance R 11, and language chip IC9 connects, and sends language alarm.IC5 is output as high level simultaneously, trigger the multivibrator work that NAND gate IC6, IC7 form, the pulse signal of multivibrator output 1HZ, connect the ground level of triode T1 through resistance R 7, R8 and NAND gate IC8, make T1 conducting or end by the frequency of input pulse signal, the output of the emitting stage of T1 makes the LED luminous warning of glimmering, open automatic dialing integrated circuit (UM-91210) IC10 simultaneously, IC10 exports spacing, i.e. " # " or " * " number information is outside triode T2 outputs on the circuit.Diode D6, capacitor C 2, resistance R 3 are formed regenerative circuit.Resistance R 5, R6, capacitor C 5 are the peripheral cell of multivibrator.
3, normal operating condition.When the user normally uses telephone set (picking up a receiver), C, D termination are led to, make photoelectricity coupling pipe GW form the loop and conducting, GW is output as electronegative potential, through NAND gate IC4, IC5, makes IC5 be output as electronegative potential, triode T3 is ended, IC5 is output as electronegative potential simultaneously, through NAND gate IC7, IC8, resistance R 7, R8, triode T1 is ended.Be the output of noiseless visual alarm and spacing.But user's normal dialing and conversation.D5 is an isolating diode, and R12 is a current-limiting resistance.
4, outer circuit broken string state.When circuit breaks outside taking place, A, B end is with regard to no-voltage, and promptly the voltage on the resistance R 2 is electronegative potential, can make NAND gate IC1 be output as high potential, but there is not positive feedback signal to be transported to the input of NAND gate IC2, because the clamping action of R3, the input that makes IC2 is an electronegative potential, through NAND gate IC2-IC5, IC5 is output as electronegative potential, triode T1, T3 are ended, rechargeable battery E is worked under low load, reduced the energy consumption of battery.
Claims (8)
1, a kind of telephone line is anti-usurps protector, it is characterized in that it is made up of illegal use observation circuit, gate circuit, broken string consumption reduction circuit, legal use observation circuit, sound alarm circuit, optical alarm circuit and automatic dial-up circuit; The illegal observation circuit that uses is attempted by outer circuit A, between the B line, the output of illegal use observation circuit connects the input of gate circuit, the output one tunnel of gate circuit connects the input of sound alarm circuit, another road output of gate circuit connects the input of optical alarm circuit, one tunnel output of optical alarm circuit connects automatic dial-up circuit, another road output of optical alarm circuit connects the input of broken string consumption reduction circuit, the output of broken string consumption reduction circuit connects the input of illegal use observation circuit, legal use observation circuit is serially connected in A, between the C line, the output of legal use observation circuit connects the input of gate circuit, and optical alarm circuit is by multivibrator, drive circuit and light-emitting component are formed.
2, protector according to claim 1 is characterized in that illegally using observation circuit to be made up of diode D1-D4, resistance R 1, R2, capacitor C 1 and NAND gate IC1-IC3; Triode D1-D4 constitutes full rectification circuit.
3, protector according to claim 2 is characterized in that legal use observation circuit is made up of photocoupler GW, resistance R 4, R12, diode D5, capacitor C 3, C4 and battery E.
4, protector according to claim 3 is characterized in that automatic dial-up circuit is made up of dialing integrated circuit (IC) 10, triode T2 and resistance R 10; Triode T2 and resistance R 10 constitute drive circuit.
5, protector according to claim 4, the consumption reduction circuit that it is characterized in that breaking is made up of diode D6, capacitor C 2 and resistance R 3.
6, protector according to claim 5 is characterized in that gate circuit is made up of NAND gate IC4, IC5.
7, protector according to claim 6, the multivibrator that it is characterized in that optical alarm circuit is made up of NAND gate IC6, IC7 and peripheral resistance R 5, R6; Drive circuit is made up of triode T1, resistance R 7-R9 and NAND gate IC8; Light-emitting component is LED.
8, protector according to claim 7 is characterized in that sound alarm circuit is made up of triode T3, resistance R 11, capacitor C 6, voltage stabilizing didoe W and language chip IC9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94209917 CN2200262Y (en) | 1994-04-26 | 1994-04-26 | Theft-proof protector for telephone line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94209917 CN2200262Y (en) | 1994-04-26 | 1994-04-26 | Theft-proof protector for telephone line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2200262Y true CN2200262Y (en) | 1995-06-07 |
Family
ID=33827476
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94209917 Expired - Fee Related CN2200262Y (en) | 1994-04-26 | 1994-04-26 | Theft-proof protector for telephone line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2200262Y (en) |
-
1994
- 1994-04-26 CN CN 94209917 patent/CN2200262Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |