CN2276691Y - Telophone safety distributing box - Google Patents
Telophone safety distributing box Download PDFInfo
- Publication number
- CN2276691Y CN2276691Y CN 96221654 CN96221654U CN2276691Y CN 2276691 Y CN2276691 Y CN 2276691Y CN 96221654 CN96221654 CN 96221654 CN 96221654 U CN96221654 U CN 96221654U CN 2276691 Y CN2276691 Y CN 2276691Y
- Authority
- CN
- China
- Prior art keywords
- circuit
- bridge
- pin
- series connection
- tie point
- Prior art date
- 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
Links
Images
Landscapes
- Telephone Set Structure (AREA)
Abstract
The utility model relates to a telephone communication device, particularly a circuit unit for preventing eavesdropping and disallowed calls. The utility model provides a telophone safety distributing box composed of a box body, a box bottom and a printed circuit board. The printed circuit board is provided with a safety circuit and a wire dividing circuit. The safety circuit comprises a divider circuit, a gate circuit, an oscillation circuit and an amplification circuit. The wire dividing circuit comprises two paths or more than paths bridge control circuits. The bridge control circuits are connected with the safety circuit through a triode V5, resistors R8R9 and a capacitor C3. The utility model not only can prevent stealing calls and eavesdropping, but also has the advantages of small size, convenient installation, reliable performance, etc. The utility model can be used in enterprises, institutions and families.
Description
The utility model relates to telephone communication set, the calling that prevents is without permission especially arranged, prevent the circuit arrangement eavesdropped.
Telephone line is made contact to be usurped, and dials and hangs domestic even international long-distance, causes very big economic loss to the telephone subscriber.In addition, enterprises and institutions or family establish extension, are eavesdropped during conversation or under a cloud eavesdropping, and have a strong impact on the rapport between the colleague or between the household, cause society or family's contradiction, even produce tragedy.And at present, still do not have and can prevent to steal line and can prevent the equipment eavesdropped again.
The purpose of the utility model be to provide a kind of can prevent to steal that line can prevent from again to eavesdrop, volume is less, installation is simple and easy, the novel phone security personnel junction box of dependable performance.
Phone security personnel junction box by box body, be contained in the box in the box body at the bottom of, the printed wiring board on being contained at the bottom of the box forms.The phone inlet wire is connected on the printed wiring board by incoming line, and the phone separated time of drawing from printed wiring board is connected on the extension by line outlet.Safety circuit is housed on the printed wiring board and divides line circuit.Safety circuit comprises the bleeder circuit that is in series by diode V4, resistance R 6 and R7 between the positive negative wire that is connected across the phone inlet wire, the gate circuit that is connected with bleeder circuit, oscillating circuit and amplifying circuit that AND circuit connects.Amplifying circuit also is connected across between the positive negative wire.Divide line circuit to form by two-way or the above bridge-type control circuit of two-way.The answer the call main track of inlet wire of one termination extension of bridge-type control circuit, the base stage of another termination triode V5 and the tie point of R9, the other end of R9 and the emitter of V5, the negative wire of the collector electrode of V5 and the inlet wire of answering the call after R8 and capacitor C 3 connect.
Below in conjunction with embodiment shown in the drawings, the utility model is explained in detail.
Accompanying drawing 1 is the utility model front view, and accompanying drawing 2 is the utility model A-A cutaway views, and accompanying drawing 3 is the utility model electrical schematic diagrams.
Shown in attached Fig. 1 and 2, phone security personnel junction box is by box body 3, is contained at the bottom of the box in the box body 34, and the printed wiring board 6 that is contained at the bottom of the box on 4 is formed.The phone inlet wire is connected on the printed wiring board 6 by incoming line 5, and the phone separated time of drawing from printed wiring board 6 is connected on the extension by line outlet 7.Steal line display lamp 1 on the box body 3 in addition, promptly the light-emitting diode HL1 in the safety circuit also has separated time display lamp 2, promptly divides the HL2～HL4 of the light-emitting diode in the line circuit.
Shown in accompanying drawing 1 to 3, safety circuit is housed on the printed wiring board 6 and divides line circuit.Safety circuit comprises the bleeder circuit that is in series by diode V4, resistance R 6 and R7 between the positive negative wire that is connected across the phone inlet wire, the gate circuit D1 that is connected with bleeder circuit, oscillating circuit and amplifying circuit that AND circuit D1 connects.Amplifying circuit also is connected across between the positive negative wire.Divide line circuit to form by two-way or the above bridge-type control circuit of two-way.The answer the call main track of inlet wire of one termination extension of bridge-type control circuit, the base stage of another termination triode V5 and the tie point of R9, the end of R9 and the emitter of V5, the negative wire of the collector electrode of V5 and the inlet wire of answering the call after R8 and capacitor C 3 connect.
As shown in Figure 3, gate circuit is made up of 33 input nand gate integrated circuit D1.R6 in the 3rd, 4,5 pin of D1-3 and the bleeder circuit and the tie point of R7 are connected, and the 6th pin is connected with the 1st pin of D1-2.The 9th pin of D1-2 is connected with the 11st, 12,13 pin of D1-1.The answer the call negative wire of inlet wire of the 7th pin of D1.
As shown in Figure 3, oscillating circuit comprises diode V3, resistance R 4R5, capacitor C 2 and NAND gate D1-2.V3 is with in parallel with R4 again after R 5 connects, and the 9th pin of the termination D1-2 after the parallel connection, the other end are connected the 2nd, 8 pin that D1-2 is inserted in the back with the end of C2, the answer the call negative wire of inlet wire of the other end of C2.
As shown in Figure 3, amplifying circuit comprises light-emitting diode HL1, triode V1V2, resistance R 1～R3, capacitor C 1 and NAND gate D1-1.Be connected across between the positive negative wire of phone inlet wire after R1 and the C1 series connection.Main track connects the collector electrode of V2 by HL, and emitter connects negative wire, and base stage inserts the 10th pin of D1-1 by R3.The emitter of V1 connects main track, and collector electrode is connected the 14th pin that D1 is inserted in the back with the tie point of R1C1, and base stage is connected with the tie point of HL1 and V2 collector electrode by R2.
As shown in Figure 3, the bridge-type control circuit is made up of the diode V6～V9 that is connected into bridge-type.Be connected on the diagonal of bridge circuit after voltage stabilizing didoe V10, R10 and the C4 series connection.Light-emitting diode HL2 and R11 parallel connection are connected on the tie point of R10 and C4 with the control utmost point of controllable silicon V11 again.
The operation principle of safety circuit is summarized as follows that during the subscriber phone on-hook, the outside line direct voltage is through the bleeder circuit dividing potential drop, and gate circuit the 3rd, 4,5 pin have 17V left and right sides malleation, and through three tunnel NAND gate circuit, the V2 base stage is a negative pressure, and V1V2 ends.Because of R6R7 is 22M Ω, so quiescent current is less than 5 microamperes.During the subscriber phone off-hook, outside line voltage leads to extension through R9, V5 conducting this moment, and gate circuit the 3rd, 4,5 pin still are 17V left and right sides positive electricity, so can normal talking.When the people made contact free call on somebody else's expense through illegal means, outer line drop was to 8V, and the voltage of gate circuit the 3rd, 4,5 pin causes V2 forward offset conducting, the luminous warning of HL1 conducting near 0.Simultaneously oscillating circuit starts, and produces disturbing pulse and lead to outside line after V2 and V1 amplify, and upsets and steals the signal that the line phone is dialled, make robber's line phone can't with the other side's switch on.No matter steal the line phone how far, can both prevent free call on sb. else's expense through illegal means effectively, guarantee safety from substation.
Divide the operation principle of line circuit to be summarized as follows: each separated time phone all not during off-hook, has only bell signal to lead to each extension set.After a certain road microphone was mentioned, the bridge-type control circuit was connected outside line and extension set, can converse.This moment, this road light-emitting diode was bright.After this, mention other extension set again, because outside line voltage has dropped to below the 8V, the bridge-type control circuit on this extension set can't conducting, so can't hear the sound of conversing.
The key technical indexes of phone security personnel junction box be quiescent current less than 5 microamperes, insert decay less than 1dB, in 300～3400H2 be ± 0.5d8 with respect to the 800Hz frequency response, the shunt isolation is greater than 25dB, the noise level is less than-60dB.
The utility model is except anti-theft wire and these two major functions of separated time, if user's microphone is not put well, the separated time display lamp is bright, can play the effect of reminding the user.
The utility model adopts velcro and two kinds of installation methods of screw, selects with the user.
Obviously, the utlity model has can prevent to steal line can prevent again the eavesdropping, advantages such as volume is less, installation is simple and easy, dependable performance, can be widely used among enterprises and institutions and the family.
In the embodiment shown in the figures, have three road and bridge the formula control circuit, can connect three extensions.D1 is 4023, and V1 and V5 are 5401, and V2 is 5551, and V3 is 4148, and V6～V9 is 4007, and V11 is 406, and R4 is 4.7M, and R5 is 1.5M, and R9 is 75 Ω, and C2 is 1 μ f.
Claims (10)
1, a kind of phone security personnel junction box, by box body (3), be contained in (4) at the bottom of the box in the box body (3), be contained at the bottom of the box printed wiring board (6) on (4) and form, the phone inlet wire is connected on the printed wiring board (6) by incoming line (5), the phone separated time of drawing from printed wiring board (6) is connected on the extension by line outlet (7), it is characterized in that being equipped with on the printed wiring board (6) safety circuit and divides line circuit:
A, safety circuit comprise the bleeder circuit that is in series by diode V4, electricity group R6 and R7 between the positive negative wire that is connected across the phone inlet wire, the gate circuit that is connected with bleeder circuit, oscillating circuit and amplifying circuit that AND circuit connects, amplifying circuit also is connected across between the positive negative wire;
B, branch line circuit are made up of two-way or the above bridge-type control circuit of two-way, one termination extension of bridge-type control circuit, the base stage of another termination triode V5 and the tie point of R9, the answer the call main track of inlet wire of the other end of R9 and the emitter of V5, the negative wire of the collector electrode of V5 and the inlet wire of answering the call after R8 and capacitor C 3 connect.
2, by the described phone security personnel of claim 1 junction box, it is characterized in that gate circuit is made up of 33 input nand gate integrated circuit D1, R6 in the 3rd, 4,5 pin of D1-3 and the bleeder circuit and the tie point of R7 are connected, the 6th pin is connected with the 1st pin of D1-2, the 9th pin of D1-2 is connected with the 11st, 12,13 pin of D1-1, the answer the call negative wire of inlet wire of the 7th pin of D1.
3, by claim 1 or 2 described phone security personnel junction boxs, it is characterized in that oscillating circuit comprises diode V3, resistance R 4R5, capacitor C 2 and NAND gate D1-2, V3 is with in parallel with R4 again after R5 connects, the 9th pin of a termination D1-2 after the parallel connection, the answer the call negative wire of inlet wire of the other end and the 2nd, 8 pin that meet people D1-2 after the end of C2 is connected, the other end of C2.
4, by claim 1 or 2 described phone security personnel junction boxs, it is characterized in that amplifying circuit comprises light-emitting diode HL1, triode V1V2, resistance R 1～R3, capacitor C 1 and NAND gate D1-1, be connected across between the positive negative wire of phone inlet wire after R1 and the C1 series connection, main track connects the collector electrode of V2 by HL1, emitter connects negative wire, base stage inserts the 10th pin of D1-1 by R3, the emitter of V1 connects main track, collector electrode is connected the 14th pin that D1 is inserted in the back with the tie point of R1C1, base stage is connected with the tie point of HL1 and V2 collector electrode by R2.
5, by the described phone security personnel of claim 3 junction box, it is characterized in that amplifying circuit comprises light-emitting diode HL1, triode V1V2, resistance R 1～R3, capacitor C 1 and NAND gate D1-1, be connected across between the positive negative wire of phone inlet wire after R1 and the C1 series connection, main track connects the collector electrode of V2 by HL1, emitter connects negative wire, base stage inserts the 10th pin of D1-1 by R3, the emitter of V1 connects main track, collector electrode is connected the 14th pin that D1 is inserted in the back with the tie point of R1C1, base stage is connected with the tie point of HL1 and V2 collector electrode by R2.
6, by claim 1 or 2 described phone security personnel junction boxs, it is characterized in that the bridge-type control circuit is made up of the diode V6～V9 that is connected into bridge-type, be connected on the bridge circuit diagonal after voltage stabilizing didoe V10, R10 and the C4 series connection, light-emitting diode HL2 and R11 parallel connection also are connected on the bridge circuit diagonal again with after the controllable silicon V11 series connection, and the control utmost point of V11 is connected on the tie point of R10 and C4.
7, by the described phone security personnel of claim 3 junction box, it is characterized in that the bridge-type control circuit is made up of the diode V6～V9 that is connected into bridge-type, be connected on the bridge circuit diagonal after voltage stabilizing didoe V10, R10 and the C4 series connection, light-emitting diode HL2 and R11 parallel connection also are connected on the bridge circuit diagonal again with after the controllable silicon V11 series connection, and the control utmost point of V11 is connected on the tie point of R10 and C4.
8, by the described phone security personnel of claim 4 junction box, it is characterized in that the bridge-type control circuit is made up of the diode V6～V9 that is connected into bridge-type, be connected on the bridge circuit diagonal after voltage stabilizing didoe V10, R10 and the C4 series connection, light-emitting diode HL2 and R11 parallel connection also are connected on the bridge circuit diagonal after adding controllable silicon V11 series connection again, and the control utmost point of V11 is connected on the tie point of R10 and C4.
8, by the described phone security personnel of claim 4 junction box, it is characterized in that the bridge-type control circuit is made up of the diode V6～V9 that is connected into bridge-type, be connected on the bridge circuit diagonal after voltage stabilizing didoe V10, R10 and the C4 series connection, light-emitting diode HL2 and R11 parallel connection also are connected on the bridge circuit diagonal again with after the controllable silicon V11 series connection, and the control utmost point of V11 is connected on the tie point of R10 and C4.
9, by the described phone security personnel of claim 5 junction box, it is characterized in that the bridge-type control circuit is made up of the diode V6～V9 that is connected into bridge-type, be connected on the bridge circuit diagonal after voltage stabilizing didoe V10, R10 and the C4 series connection, light-emitting diode HL2 and R11 parallel connection also are connected on the bridge circuit diagonal again with after the controllable silicon V11 series connection, and the control utmost point of V11 is connected on the tie point of R10 and C4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96221654 CN2276691Y (en) | 1996-09-06 | 1996-09-06 | Telophone safety distributing box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96221654 CN2276691Y (en) | 1996-09-06 | 1996-09-06 | Telophone safety distributing box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2276691Y true CN2276691Y (en) | 1998-03-18 |
Family
ID=33901498
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96221654 Expired - Fee Related CN2276691Y (en) | 1996-09-06 | 1996-09-06 | Telophone safety distributing box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2276691Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109030977A (en) * | 2018-06-01 | 2018-12-18 | 北京新能源汽车股份有限公司 | A kind of high pressure broken string box and its control method and control device |
-
1996
- 1996-09-06 CN CN 96221654 patent/CN2276691Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109030977A (en) * | 2018-06-01 | 2018-12-18 | 北京新能源汽车股份有限公司 | A kind of high pressure broken string box and its control method and control device |
| CN109030977B (en) * | 2018-06-01 | 2021-01-26 | 北京新能源汽车股份有限公司 | High-voltage wire breaking box and control method and control device thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| NO945099D0 (en) | Connection channel switching and circuitry | |
| CN2276691Y (en) | Telophone safety distributing box | |
| CN2181141Y (en) | Multi-function telephone wire connector | |
| CN2229737Y (en) | Telephone set with secrecy device in party-line system of exchange | |
| CN2185963Y (en) | Theft-proof alarm for telephone line | |
| CN2249467Y (en) | Automatic controlling device for telephone set | |
| CN2235683Y (en) | Telephone connection box with anti-fraudulent use function | |
| CN2204079Y (en) | Secrecy arrangement in party-line system telephone with function of fraudulence use of telephone | |
| CN2267585Y (en) | Double sound and multi-frequency dialing type telephone for preventing fraudulent use | |
| CN2187862Y (en) | Telephone automatic speech alarm machine | |
| CN2277605Y (en) | Telephone device preventing eavesdropping, unauthorised calling and lightning | |
| CN2162048Y (en) | Pluse locking controller for automatic telephone | |
| CN2211676Y (en) | Circuit protector against illegal trunk multiple | |
| CN2312545Y (en) | Multi-functional means for preventing unauthorised calling for telephone | |
| CN2218428Y (en) | Multifunctional automatic controller for telephone recording | |
| CN2212863Y (en) | Multifunctional telephone switchboard apparatus | |
| CN2236198Y (en) | Anti-theft device for telephone line | |
| CN2222987Y (en) | Multifunctional telephone connector | |
| CN2205614Y (en) | Anti-theft alarm rosette for automatic telephone line | |
| CN2241954Y (en) | Telephone set with function of disconnection alarming and preventing eavesdropping and preventing unauthorised calling | |
| CN2140117Y (en) | Multifunction automatic adapter for telephone with same-line | |
| CN2169255Y (en) | Lock for telephone line | |
| CN2265041Y (en) | Theft-proof protector for telephone line | |
| CN2197775Y (en) | Automatic guard against telephone illegal connection | |
| CN2259028Y (en) | Protector for avoiding fraudulent use of telephone line |
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 |