CN2202381Y - Controller for preventing theft of telecommunication line - Google Patents

Controller for preventing theft of telecommunication line Download PDF

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Publication number
CN2202381Y
CN2202381Y CN94214946U CN94214946U CN2202381Y CN 2202381 Y CN2202381 Y CN 2202381Y CN 94214946 U CN94214946 U CN 94214946U CN 94214946 U CN94214946 U CN 94214946U CN 2202381 Y CN2202381 Y CN 2202381Y
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CN
China
Prior art keywords
circuit
interference signal
signal generator
control circuit
telecommunication line
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
Application number
CN94214946U
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Chinese (zh)
Inventor
刘�英
刘杰
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Individual
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Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to CN94214946U priority Critical patent/CN2202381Y/en
Application granted granted Critical
Publication of CN2202381Y publication Critical patent/CN2202381Y/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model relates to a theft-proof controller for telecommunication lines, which is composed of a line state detection circuit 1, a control circuit 2 and an interference signal generator 3, wherein, the line state detection circuit and the interference signal generator are connected in parallel to telecommunication lines L 1, L 2; a sampling element 4 of the control circuit is connected in series to a telecommunication line between a thief's terminal machine 14 and a terminal machine 13 of a legal user; the control circuit is composed of a sampling element and an amplifier 5. The utility model is connected to a user's line; when a thief picks up a telephone, the utility model sends out noise to cause an exchanger not to work, and the thief can not use the telephone. The utility model has no influence on a legal user, and the thief can be found easily.

Description

Controller for preventing theft of telecommunication line
Telecommunication line prevents usurping the checkout gear that controller belongs to anti-control device of usurping of telecommunication line and telecommunication line broken string.
The anti-control device of usurping of existing telecommunication line is all very complicated, and also has contact, poor reliability.
The purpose of this utility model is a kind of controller of design, and this controller is connected on the service wire of telecommunication terminal machine, and when telecommunication line was stolen, this controller sent an interference signal, and appropriator can not be used, but validated user is used did not influence.When telecommunication line broke, this controller can show again.This controller is contactless, and circuit structure is simple.
The utility model is made up of line status testing circuit 1, control circuit 2, interference signal generator 3.Line status testing circuit 1, interference signal generator 3 are attempted by telecommunication line L 1, L 2On, control circuit 2 is made up of sampling element 4, amplifier 5.Sampling element 4 is serially connected on the telecommunication line between appropriator terminating machine 14 and the validated user terminating machine 13, the output termination interference signal generator 3 of amplifier 5.Line status testing circuit 1 is by diode D 1, R 1Form.D 1, R 1Two ends and at L, back are connected in series 1, L 2On, D 1With R 1Tie point connect the input of power circuit 15, the output termination interference signal generator 3 of power circuit 15 and the power end of control circuit 2.
Interference signal generator 3 is usurped display circuit and is formed by oscillating circuit, control gate circuit, power amplifier output circuit, warning circuit, nothing.Every road oscillating circuit and a control gate circuit are connected in series, and the output tandem of all control gate circuit is on the input of power amplifier output circuit, and the output of power amplifier output circuit is attempted by L 1, L 2On.Warning circuit is connected on the input of power amplifier output circuit, does not usurp on the output that display circuit is connected on the power amplifier output circuit and have.
The utility model is connected on telecommunication line L with legal telecommunication terminal machine 1, L 2On, when the telecommunication terminal machine did not have off-hook, the control circuit of this device, interference signal generator were not worked.When off hook signal, judge it is validated user or appropriator immediately, appropriator makes switch can not receive effective dialing signal immediately to switch with usurp terminating machine and send interference signal in this way, and appropriator can not use.As judgement is validated user, and control gate is not exported interference signal.Make its operate as normal.As validated user and appropriator off-hook all, can converse between the two, so that find appropriator.Also can show during the telecommunication line broken string.This device can merge in existing telephone machine and other telecommunication terminal machine, makes it to become the antitheft telecommunications terminating machine of using.
Fig. 1 is the utility model overall structure schematic diagram.Fig. 2 is the circuit structure diagram of embodiment one.Fig. 3 is the circuit structure diagram of embodiment two.
Embodiment one: present embodiment is made up of line status testing circuit 1, control circuit 2, interference signal generator 3, power circuit 15.Line status testing circuit 1 is by R 1, D 1Form.D 1Be voltage stabilizing didoe, D 1With R 1After being connected in series, two ends and at L 1, L 2On.D 1With R 1Tie point and the T of power circuit 1B extremely continuous, T 1The e utmost point meet power supply E, the c utmost point is given control circuit 2 and 3 power supplies of interference signal generator.Control circuit 2 is by R 2, T 2Form.R 2Be serially connected in L 2On, T 2The b utmost point meet R 2, T 2The c utmost point connect on the input of each control gate circuit of interference signal generator 3.Interference signal generator 3 is usurped display circuit 12 and is formed by oscillating circuit 6 and 7, control gate circuit 8 and 9, power amplifier output circuit 10, warning circuit 11, nothing.Oscillating circuit 6 is by inverse gate F 5, R 5, C 1Form.Oscillating circuit 7 is by inverse gate F 6, R 4, C 2Form.Control gate circuit 8 is by inverse gate F 3, F 1Form.Control gate circuit 9 is by inverse gate F 4, F 2Form.Control gate circuit 8 is connected in series with oscillating circuit 6, and control gate circuit 9 is connected in series with oscillating circuit 7.Be connected on power amplifier output circuit T after the output parallel connection of two control gate circuit 3Input on, T 3Output be attempted by L 1And L 2 Last warning circuit 11 by loudspeaker with Y and light-emitting diode D 3Form.Y and D 3Be connected on T after the series connection 3Input on.Do not have and usurp display circuit 12 by light-emitting diode D 4, R 3Form.D 4With R 3Be connected on T after the series connection 3Output on.
When the unmanned off-hook of telecommunication terminal machine, D 1Puncture V R1＞V E1So, T 1End V DDNo-voltage output, interference signal generator and control circuit are not worked.When telecommunication line terminal off-hook, D 1End T 1Conducting produces supply power voltage V DD, make its work for the power supply of interference signal generator and control circuit.When off-hook is validated user 13, at R 2Last generation pressure drop makes T 2Conducting.Export a low level and give F 3, F 4, make the blocking of oscillator, pass less than on the circuit, make the validated user operate as normal.When the off-hook person is appropriator 14, R 2So last no pressure drop is T 2End, export a high level and give F 3, F 4, control gate is opened, and oscillator signal passes on the circuit, and appropriator can't use.Loudspeaker ring simultaneously, D 3Bright, alarm.As pick up phone, again do not export at this moment by oscillator signal for validated user, and validated user just can be conversed with appropriator, and it is caught.Work as D 4The explanation circuit is not disconnected when bright, and does not have the appropriator off-hook.
Embodiment two: the difference of present embodiment and embodiment one is control circuit 2, and sampling element is by D 2Serve as.D 2String is at L 2On, T 2The b utmost point meet diode D 2Negative pole, T 2The C utmost point connect the input of interference signal generator (3) control gate.T when the appropriator off-hook 2End, control gate is opened, oscillator signal output.Otherwise T 2Control gate is sealed in conducting, the blocking of oscillator.Be ties reverse parallel connection D 2Another effect be to provide path to ringing-current.

Claims (4)

1, telecommunication line prevents that usurping controller is made up of line status testing circuit (1), control circuit (2), interference signal generator (3), is characterized in that line status testing circuit (1), interference signal generator (3) are attempted by telecommunication line L 1, L 2On, the sampling element (4) of control circuit (2) is serially connected on the telecommunication line between appropriator terminating machine (14) and the validated user terminating machine (13); Control circuit (2) is made up of sampling element (4) and amplifier (5), the output termination interference signal generator (3) of amplifier (5).
2, telecommunication line according to claim 1 is anti-usurps controller, and the sampling element (4) that it is characterized in that control circuit (2) is by resistance R 2Serve as, amplifier (5) is by triode T 2Serve as.
3, telecommunication line according to claim 1 is anti-usurps controller, and the sampling element (4) that it is characterized in that control circuit (2) is by diode D 2Serve as D 2Be serially connected in the telecommunication line T 2Base stage meet diode D 2Negative pole, T 2The C utmost point connect interference signal generator (3).
4, telecommunication line according to claim 1 is anti-usurps controller, it is characterized in that line status testing circuit (1) is by diode D 1, R 1Form D 1, R 1Two ends and at L, back are connected in series 1, L 2On, D 1With R 1Tie point connect input, the output termination interference signal generator (3) of power circuit and the power end of control circuit (2) of power circuit (15).
CN94214946U 1994-04-08 1994-06-08 Controller for preventing theft of telecommunication line Expired - Fee Related CN2202381Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN94214946U CN2202381Y (en) 1994-04-08 1994-06-08 Controller for preventing theft of telecommunication line

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CN94208014 1994-04-08
CN94208014.9 1994-04-08
CN94214946U CN2202381Y (en) 1994-04-08 1994-06-08 Controller for preventing theft of telecommunication line

Publications (1)

Publication Number Publication Date
CN2202381Y true CN2202381Y (en) 1995-06-28

Family

ID=34065507

Family Applications (1)

Application Number Title Priority Date Filing Date
CN94214946U Expired - Fee Related CN2202381Y (en) 1994-04-08 1994-06-08 Controller for preventing theft of telecommunication line

Country Status (1)

Country Link
CN (1) CN2202381Y (en)

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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