CN1115851C - Four-line loop testing method and device for communication channel - Google Patents
Four-line loop testing method and device for communication channel Download PDFInfo
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- CN1115851C CN1115851C CN 99121182 CN99121182A CN1115851C CN 1115851 C CN1115851 C CN 1115851C CN 99121182 CN99121182 CN 99121182 CN 99121182 A CN99121182 A CN 99121182A CN 1115851 C CN1115851 C CN 1115851C
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Abstract
The present invention relates to a four-line loopback testing method and a four-line loopback testing device for a communication channel. The testing method has the steps that a command controller of a communication control center transmits a command signal and a testing signal which are transmitted to a receiver arranged between far-end communication equipment and user equipment by a communication channel, and a user is disconnected by the receiver according to the received signals so as to loop the testing signal back to the control center which judges whether the communication channel is normal according to the existence of the loopback signal or the parameter of the loopback signal. The testing device is composed of the command controller and the receiver. The present invention can rapidly and accurately determine the occurrence of the failure of the communication channel and the range of the failure so as to provide reliable reference for pertinent timely recovery.
Description
The present invention relates to a kind of communication port method of testing and device, specifically relate to a kind of four-line loop testing method and device that communicates lane testing by instruction control unit that is located at communication control center and the receiver that is located at far-end.
In the communication equipment of using, still extensively adopt at present with audio frequency four lines or two wires mode transmission signals.Communication equipment can influence the quality of the unimpeded of communication port or communication in actual use owing to multiple factor, therefore need monitor and detect communication port.Because communication generally all is to carry out between remote, thereby the place of ging wrong of will conveniently forming a prompt judgement is by no means easy.Traditional monitoring method is to carry out on duty to equipment at the scene and maintenance by the communication speciality personnel, and obviously its efficient is not high.Present communication equipment more or less all has the monitoring function of itself, but majority improves not to the utmost or operation inconvenience.General situation is that most equipment can not monitor apparatus for remote communication and users' interfaces place, when mixing uses distinct device to transmit, just monitor difficulty more especially.Like this, in case break down, just be difficult to the problem whether judgement communicates by letter, it is the problem of which section? or user's problem? certainly can draw an inference by experience or subjective, but in fact, so often can not deal with problems, thus the on-the-spot actual inspection of also will sending someone, the test could determine, rather waste time and energy.Because getting in touch of communication and people's production and life is tight day by day, and apparatus for remote communication more and more trends towards moving under the unattended operation state, that communicates by letter is reliable and unimpeded most important for the normal operation that guarantees many departments and system, also extremely important to the maintenance of communication equipment.Therefore how can be rapidly, failure judgement place exactly, effectively repairing of tissue in time just becomes the important topic that assistant officer to be solved of pendulum in face of people.
One of purpose of the present invention provides a kind of four line communication ports that utilize itself it is carried out the communication port four-line loop testing method of remote loopback test, so that determine the scope whether communication port has fault and break down quickly and accurately, for tissue repairing in time targetedly provides reliable basis.
Two of purpose of the present invention is for realizing that above-mentioned method of testing provides a kind of easy and simple to handle, test testing apparatus fast and accurately that this device was both configurable on communication or subscriber equipment, can use separately again.
For achieving the above object, the invention provides a kind of communication port four-line loop testing method, this method is to send command signal and test signal by the instruction control unit that is located at communication control center, this command signal and test signal transfer to the receiver that is located between apparatus for remote communication and the subscriber equipment through communication port, receiver is according to the signal instruction disconnect user that receives, and test signal is looped back to control centre, control centre is according to having or not the parameter of signal loopback or loopback signal to judge whether communication port is normal.
This method is the transmitting terminal (T at some four line communication ports to be tested
X) and receiving terminal (R
X) hold port to carry out terminal test.
The command signal that described instruction control unit sends is a touch-tone signal, and it comprises the signal A that carries out call test with audio frequency or pulse mode; Carry out the signal B of interlude four line signal loopback tests; Carry out the signal C of terminal four line signal loopback tests and finish all tests, the signal D that communication port is recovered.
Parameter by the receiver loopback signal comprises level height, frequency and noise.
To achieve the above object of the invention, the present invention also provides to realizing the required testing apparatus of above-mentioned method of testing, this device is made of instruction control unit and receiver, wherein instruction control unit is arranged at communication control center, receiver then places between apparatus for remote communication and the subscriber equipment, and, also can be built in communication equipment end or subscriber equipment front end as its connection interface.
Described instruction control unit comprises pulse/dual-tone multifrequency and command generator, measuring signal generator, test selector switch, the audio amplifier circuit that is used to send, input display unit and the power circuit that is used to receive and show loopback signal, wherein pulse/dual-tone multifrequency and command generator link to each other with the test selector switch, measuring signal generator and signal display apparatus link to each other with the test selector switch, audio amplifier circuit respectively with the transmitting terminal (T of test selector switch and controller
X) and receiving terminal (R
X) link to each other, the input display unit is connected in the receiving terminal (R of controller
X); On the panel of instruction control unit, be provided with the dialing keyboard, test selector switch switch plate, start button, conclusion button, mute button, the level that link to each other with above-mentioned corresponding component and adjust knob, Headphone Volume Control and mains switch.
Described pulse/dual-tone multifrequency and command generator are made of dialing keyboard, integrated circuit (IC) chip U1 and peripheral circuit thereof, its peripheral circuit comprises crystal oscillator XT1, relay J 1, triode Q1 and resistance R 1～R3, wherein, crystal oscillator XT1 links to each other with integrated circuit (IC) chip, and relay J 1 and triode Q1 are connected in the said integrated circuit chip and test between selector switch K1, K2, the K3.
Described measuring signal generator is made of integrated circuit (IC) chip U2 and peripheral circuit thereof, and wherein integrated circuit (IC) chip U2 is the function generator circuit, and the sine wave of 1KHZ of getting its generation is as test signal; Its peripheral circuit comprises potentiometer W3～W5, capacitor C8, C9 and resistance R 8～R12, and wherein potentiometer W4, W5 link to each other with integrated circuit (IC) chip, and potentiometer W3 two ends link to each other with the test selector switch with integrated circuit (IC) chip U2 respectively with C1 through capacitor C 8.
Described test selector switch comprises selector switch K1, start button K2 and conclusion button K3, wherein selector switch K1 comprises three groups of K1-1, K1-2, K1-3, every group all has four gears, four gears respectively respective pulses phone, voice frequency telephone, four lines (in) and four lines (end) test.
Described audio amplifier circuit is made of integrated circuit (IC) chip U3, U4.
Described input display unit can be the loud speaker that sound shows, also can be frequency meter, level meter that numeral or pointer show, and they can be built in the controller, also can place outside the controller.
Described input display unit is made of loud speaker, integrated circuit (IC) chip U4 and peripheral circuit thereof, said integrated circuit chip U4 input links to each other with the controller receiving terminal through capacitor C 6, potentiometer W2, audio frequency isolating transformer T2, and link to each other with selector switch K1 through capacitor C 7, resistance R 7, its output connects loud speaker through capacitor C 4, C5, resistance R 6, its peripheral circuit comprises audio frequency isolating transformer T2, potentiometer W2 and capacitor C 4～C7, and its sound intermediate frequency isolating transformer is connected in the receiving terminal of instruction control unit.
Described power circuit is made of integrated circuit (IC) chip U5, rectifier bridge B1, AC transformer T3, capacitor C 10, C11.
Described receiver includes dual-tone multifrequency receiving circuit, decoding circuit, monostable trigger-action circuit, level and impedance matching circuit, selector switch SW1, power circuit and controls relay J 2, the J3 of relay J 4, J5 and control phone loopback that four wire loops return, wherein the dual-tone multifrequency receiving circuit respectively with four line receiving terminal (R
X) and decoder link to each other, decoder links to each other with monostable trigger-action circuit, monostable trigger-action circuit links to each other with relay, and relay J 4, J5 are respectively through communicate by letter with the four lines receiving terminal (R of side of audio frequency isolating transformer T5, T6
X) and transmitting terminal (T
X) link to each other, relay J 2, J3 link to each other with the user side phone with the communication side of phone respectively, and level and impedance matching circuit are connected between relay J 4, the J5.
Described dual-tone multifrequency receiving circuit is made of integrated circuit (IC) chip U6 and peripheral circuit thereof, its peripheral circuit comprises a dual-tone multifrequency input coupling circuit, delay circuit and capacitor C 13, resistance R 15, crystal oscillator XT2, dual-tone multifrequency input coupling circuit wherein is by capacitor C 22, C23, resistance R 16, R25, R26 constitute, this circuit is connected between integrated circuit (IC) chip U6 and the four line receiving terminals, delay circuit is made of resistance R 13, R14, capacitor C 12 and triode Q2, and this circuit links to each other with integrated circuit (IC) chip U6, U7.
Described decoding circuit is made of integrated circuit (IC) chip U7 and peripheral circuit thereof, and its peripheral circuit comprises diode D2～D6, capacitor C 14, C15 and resistor chain RES.
Described monostable trigger-action circuit is divided into two groups, and each is made of integrated circuit (IC) chip U8A, U8B and peripheral circuit, and its peripheral circuit comprises by capacitor C 16, resistance R 18, reaches the delay circuit and the diode D7～D10 of capacitor C 17, resistance R 19 formations.
Described level and impedance matching circuit are made of resistance R 27～R32.
Described power circuit is made of integrated circuit (IC) chip U9 rectifier bridge B2, AC transformer T4, capacitor C 24, C25.
Described relay J 2～J5 is double-point double-throw switch, the public terminated communications side phone output of J2 wherein, normally closed termination substation; The answer load resistance R24 of machine of the Chang Kaiduan of the public termination J2 of J3, and link to each other with level and impedance matching circuit (24), the Chang Kaiduan of J3 by capacitor C 19, C20; The J4 common port side joint receiving end (R that communicates by letter with four lines
X) link to each other normally closed termination four line user side receiving terminal (R
X), Chang Kaiduan then connects level and impedance matching circuit; The common port of the J5 side transmitting terminal (T that communicates by letter with four lines
X) link to each other normally closed termination four line user side transmitting terminal (T
X), Chang Kaiduan then connects level and impedance matching circuit; J2～J5 is last and be connected to diode D11～D14, and is serially connected with triode Q3～Q6, resistance R 20～R23.
As seen from the above technical solution, communication port four-line loop testing method of the present invention and device system utilize four line communication ports itself that it is carried out the remote loopback test.Command signal that controller produced and test signal can be transmitted in this four-wire channel, and the far-end receiving system is discerned this command signal, drive the corresponding actuating of relay, original subscriber's circuit is disconnected, and hoop is got back to control centre.Device at ordinary times with the original signal channel separation, it is not shunted, unattenuated, do not have plug-in effect, do not introduce noise, can misoperation, and if only if just moves when receiving effective instruction, makes the signal loopback.Device is not having operation i.e. release automatically in back 2 minutes, circuit restoration.Testing apparatus of the present invention belongs to the little current circuit of low pressure, and itself reliability is very high, few fault; The circuit of each passage is separate in its receiver, is independent of each other; Circuit is simple, and logicality is strong, can misoperation; In addition, if the device outage only influences its measuring ability, and does not influence communication.
Use testing apparatus of the present invention, can make communication staff in control centre, by shirtsleeve operation, just can conclude accurately rapidly whether communication port has fault, fault coverage where, for tissue repairing in time targetedly provides reliable basis, help improving the validity of work, rationally use human and material resources; Special in some unattended websites far away, perhaps when weather was abominable, its effect was just bigger.This device can also be measured the variation of channel transfer level quantitatively, and the noise level of sense channel is subjected to disturbed condition qualitatively, or the like; Also can simulate off-hook and simulation transmission dialing signal to the two wires phone.
The present invention has the application of broad, and it can be widely used in the monitoring of four lines and telephone channel in the communication system of fields such as post and telecommunications, electric power, traffic, oil, public security or department.
The invention will be further described below in conjunction with accompanying drawing and a preferred embodiment.
Fig. 1 is the instruction control unit structured flowchart of testing apparatus of the present invention.
Fig. 2 is an instruction controller panel structural representation.
Fig. 3 is an instruction controller circuitry schematic diagram.
Fig. 4 is the receiver architecture block diagram of testing apparatus of the present invention.
Fig. 5 is a receiver panel construction schematic diagram.
Fig. 6 is the acceptor circuit schematic diagram.
Fig. 7 is a testing apparatus test process flow chart of the present invention.
The main points of communication port four-line loop testing method of the present invention are to utilize existing four line communication ports itself that this communication port is carried out the remote loopback test.This test is the transmitting terminal (T at communication port to be tested
X) and receiving terminal (R
X) hold port to carry out terminal test.Its key step is as follows: at first send command signal and test signal by the instruction control unit that is located at communication control center, be added to the transmitting terminal (T of communication port
X), this command signal is a touch-tone signal, it comprises the signal A that carries out call test with audio frequency or pulse mode; Carry out the signal B of interlude four line signal loopback tests; Carry out the signal C of terminal four line signal loopback tests and finish all tests, the signal D that communication port is recovered.Test signal then is the test signal of the sine wave signal of the 1KHZ that produced by instruction control unit as approximate test.This command signal and test signal transfer to the receiver that is located between apparatus for remote communication and the subscriber equipment through communication port, this receiver is according to the signal instruction that receives, by driving the corresponding relays disconnect user, and hoop got back to control centre, control centre judges according to the parameter that has or not signal loopback or loopback signal (comprising level height, frequency and noise etc.) whether communication port is normal.
Relate to two important devices in the said method, i.e. instruction control unit and receiver, they are the hardware of realizing method of testing of the present invention.The present invention thereby the special testing apparatus of realizing above-mentioned method of testing is provided.This testing apparatus is made of instruction control unit 1 and receiver 2, wherein instruction control unit is arranged at communication control center, receiver then places between apparatus for remote communication and the subscriber equipment, and as its connection interface, also can be built in communication equipment end or subscriber equipment front end.This testing apparatus structure is shown in Fig. 1～6.Wherein Fig. 1 is the structured flowchart of instruction control unit, and Fig. 3 is an instruction controller circuitry schematic diagram.As shown, instruction control unit 1 comprises pulse/dual-tone multifrequency and command generator 11, measuring signal generator 12, test selector switch 13, the audio amplifier circuit 14 that is used to send, input display unit 15 and the power circuit 19 that is used to receive and show loopback signal, wherein pulse/dual-tone multifrequency and command generator 11 are made of dialing keyboard 16, integrated circuit (IC) chip 111 (U1) and peripheral circuit thereof, are used to produce the dial impulse signal or the touch-tone signal of telephone channel test usefulness and produce control command signal.Said integrated circuit chip preferred pulse/dual tone multi-frequency signal generator chip UM91210, it is used to produce control command signal (A, B, C, D), and produces dialing signal.Its X1～X4 and Y1～Y4 are respectively row, column key inputs, and the dialing keyboard 16 of combined standard will produce the dialing tone signal.Here, utilize the combination of Y4 and X1～X4, the K1 of selector switch 13, K2, K3 etc. generate following command signal after tested:
A---carries out call test (audio frequency or pulse mode)
B---carries out interlude four line signal loopback tests
C---carries out terminal four line signal loopback tests
D---finishes all tests, and communication port recovers
The peripheral circuit of integrated circuit (IC) chip U1 comprises crystal oscillator XT1, relay J 1, triode Q1 and resistance R 1～R3, and wherein, crystal oscillator XT1 connects 8,9 pin of integrated circuit (IC) chip U1.Its 7 pin is pulse/audio selection end, produces pulse signal P during high potential, by the output of 14 pin, produces touch-tone signal T during electronegative potential, and by the output of 12 pin, P, T signal are coupled to the K1-1 of test selector switch 13 respectively.Relay J 1 is divided into two groups of J1-1, J1-2, two groups of actions simultaneously under signal controlling.Wherein J1-1 one end links to each other with integrated circuit (IC) chip U1, and its normal-closed end links to each other with the K1-2 of test selector switch 13; The end of J1-2 links to each other with integrated circuit (IC) chip U1, and its normal-closed end links to each other with the K1-1 of test selector switch 13.The J1 two ends are serially connected with triode Q1, resistance R 2, R3, and are connected to diode D1.
Described measuring signal generator 12 is made of integrated circuit (IC) chip 121 (U2) and peripheral circuit thereof, integrated circuit (IC) chip U2 preferred function generator circuit chip IC L8038 wherein, it is the function generator circuit, can produce the waveform such as square wave, triangular wave, sine wave of different frequency.Here only utilize it to produce the sine wave of 1KHZ as test signal.Its peripheral circuit comprises potentiometer W3～W5, capacitor C8, C9 and resistance R 8～R11, and wherein potentiometer W4, W5 link to each other with integrated circuit (IC) chip, and potentiometer W3 two ends link to each other with test selector switch 13 with integrated circuit (IC) chip U2 respectively with C1 through capacitor C 8.This peripheral circuit is used to adjust the waveform and the frequency of sine wave output, and the stability of this sine wave signal can satisfy the general test requirement.The sine wave of 1KHZ is coupled to the K1-1 of test selector switch 13 by capacitor C8, potentiometer W3.
Described test selector switch 13 comprises selector switch K1, start button 132 (K2) and conclusion button 133 (K3), wherein selector switch K1 comprises three groups of K1-1, K1-2, K1-3, every group all has four gears, four gears respectively respective pulses phone, voice frequency telephone, four lines (in) and four lines (end) test.Specify as follows:
1 grade--the test of-pulse telephone, this moment, K1-1 was a pulse P signal, and K1-2 is a high potential, and K1-3 connects 1 pin of integrated circuit U1.Press start button K2, will produce instruction A.
2 grades--the test of-voice frequency telephone, this moment, K1-1 was an audio frequency T signal, and K1-2 is an electronegative potential, and K1-3 connects 1 pin of integrated circuit U1.Press start button K2, will produce instruction A.
3 grades---four lines (interlude) test, this moment, K1-1 was the sine wave signal of 1KHZ, and K1-2 is an electronegative potential, and K1-3 connects 2 pin of integrated circuit U1, presses start button K2, will produce instruction B.
4 grades---four lines (end) test, this moment, K1-1 was the sine wave signal of 1KHZ, and K1-2 is an electronegative potential, and K1-3 connects 3 pin of integrated circuit U1, presses start button K2, will produce instruction C.
K2 pins 2 seconds effectively for the beginning testing button.When pressing, K2-1 connects, and the instruction of generation (A, B, C) can be different because of the gear of K1; When pressing, K2-2 connects, will be with seasonal relay J 1 action, and to guarantee can to produce command signal when arbitrary gear.
K3 pins 2 seconds effectively for finishing testing button.When pressing, K3-1 connects, and produces instruction D; And K3-2 connects when pressing, also will be with seasonal relay J 1 action, to guarantee producing command signal.
In the test selector switch, also comprise a mute button 134 (K4).This button is being pressed seasonal transmitting terminal T
XDo not have signal to send, thereby can check the noise of four line communication ports.
Described audio amplifier circuit 14 is made of integrated circuit (IC) chip 141 (U3), 142 (U4).This circuit and the transmitting terminal T that tests selector switch and controller
XWith receiving terminal R
XLink to each other, wherein the preferred audio amplifier circuit chip of U3, U4 LM386.Received signal R
XThe signal of remote terminal loopback (promptly from) is coupled to chip U4 through audio frequency isolating transformer T2, potentiometer W2, capacitor C 6 etc., amplifies the rear drive loud speaker, so that monitor loopback signal.Capacitor C 7 and resistance R 7 are coupled to chip U4 to the dialing tone signal, so that monitor dialing tone.The audio amplifier circuit chip LM386 that integrated circuit (IC) chip U3 is preferably identical with U4.It can amplify the sinusoidal wave test signal of dialing tone signal or 1KHZ, adjust to suitable level, is coupled to transmitting terminal T by capacitor C 3, audio frequency isolating transformer T1 again
XPotentiometer W1 is used to adjust the transmission level of signal.
Described input display unit 15 can be the loud speaker that sound shows, also can be the frequency meter that shows of numeral or pointer, level meter etc., and they can be built in the controller, also can adopt suitable being used to detect instrument, the instrument of audio signal.Provide the example that shows the device of loopback signal with form of sound in this example.This device is made of loud speaker 151, integrated circuit (IC) chip U4 and peripheral circuit thereof, said integrated circuit chip U4 input links to each other with the controller receiving terminal through capacitor C 6, potentiometer W2, audio frequency isolating transformer T2, and link to each other with selector switch K1 through capacitor C 7, resistance R 7, its output connects loud speaker through capacitor C 4, C5, resistance R 6, its peripheral circuit comprises audio frequency isolating transformer T2, potentiometer W2 and capacitor C 4～C7, and its sound intermediate frequency isolating transformer is connected in the receiving terminal of instruction control unit.Received signal R
XThe signal of remote terminal loopback (promptly from) is coupled to chip U4 through audio frequency isolating transformer T2, potentiometer W2, capacitor C 6 etc., amplifies the rear drive loud speaker, so that monitor loopback signal.Capacitor C 7 and resistance R 7 are coupled to chip U4 to the dialing tone signal, so that monitor dialing tone.
Described power circuit 19 is made of integrated circuit (IC) chip U5 (preferred 7812), rectifier bridge B1, AC transformer T3, capacitor C 10, C11.
The circuit part of instruction control unit 1 is contained in the housing, its panel construction as shown in Figure 2, this panel is provided with the dialing keyboard 16 that links to each other with above-mentioned corresponding component, test selector switch switch plate 131, start button 132 (K2), conclusion button 133 (K3), mute button 134, level and adjusts knob 17, Headphone Volume Control 18 and mains switch 191.
Another device of the present invention is receiver 2, and its structure can be referring to Fig. 4～6, and wherein Fig. 4 is its structured flowchart, and Fig. 6 is its circuit theory diagrams.Circuit among Fig. 6 is just tested the element circuit of a four-wire channel and a phone.Usually the user for some websites has two four-wire channels (master uses and be standby).As Fig. 4, shown in Figure 6, this receiver includes dual-tone multifrequency receiving circuit 21, decoding circuit 22, monostable trigger-action circuit 23, level and impedance matching circuit 24, selector switch 25 (SW1) power circuit 26 and controls relay J 2, the J3 of relay J 4, J5 and control phone loopback that four wire loops return.Wherein dual-tone multifrequency receiving circuit 21 is made of integrated circuit (IC) chip 211 (U6) and peripheral circuit thereof, the preferred dual-tone multifrequency receiving circuit of said integrated circuit chip chip MT8870, its 11～14 pin is exported the audio signal that receives by binary-coded heuristicimal code, send decoding circuit decoding.Its peripheral circuit comprises a dual-tone multifrequency input coupling circuit (212), delay circuit (213) and capacitor C 11, resistance R 14, crystal oscillator XT2, dual-tone multifrequency input coupling circuit wherein is by capacitor C 22, C23, resistance R 16, R25, R26 constitute, and this circuit is connected between integrated circuit (IC) chip U6 and the four line receiving terminals.Delay circuit is made of resistance R 13, R14, capacitor C 12 and triode Q2, and this circuit links to each other with integrated circuit (IC) chip U6, U7.
Above-mentioned decoding circuit 22 is made of integrated circuit (IC) chip 221 (U7) and peripheral circuit thereof, the preferred decoding circuit chip of integrated circuit (IC) chip CD4515 wherein, it is 4/16 decoding circuit, it is deciphering from the binary-coded heuristicimal code of integrated circuit (IC) chip U6, get wherein Y13～Y15 and four output signals of Y0, respectively as instruction A, B, C, D, these command signals will be controlled the operating state of monostable trigger-action circuit 23, thereby whether the action, signal of controlling each relay loopback etc., wherein A, B, C are triggering command, and D is release command.Its peripheral circuit comprises diode D2～D6, capacitor C 14, C15 and resistor chain RES.
Above-mentioned monostable trigger-action circuit 23 is divided into two groups, and each is made of integrated circuit (IC) chip U8A, U8B and peripheral circuit.The preferred single-shot trigger trigger chip of this integrated circuit (IC) chip CD4013, wherein U8A is used to control the call test part, and U8B is used to control four line part of detecting.Its peripheral circuit comprises by capacitor C 16, resistance R 18, reaches the delay circuit and the diode D7～D10 of capacitor C 17, resistance R 19 formations.With monostable trigger-action circuit U8B is example, and its 11 pin is a trigger end, and 13 pin are output.When 11 pin are triggered, 13 pin will become high level.Capacitor C 17, resistance R 19 are formed about two minutes time-delay, and D8 can quicken recovery process.Its 10 pin is a reset terminal, and when it was high level, 13 pin recovered electronegative potential.
Level and impedance matching circuit 24 are made of resistance R 27～R32.This circuit can be adjusted its resistance according to the interface level and the interface impedance of different communication ports.
Selector switch 25 (SW1) establish SW1 (in) and two gears of SW1 (end), it links to each other with monostable trigger-action circuit U8B with decoding circuit respectively, is respectively applied for four line stage casings and test eventually.When receiver placed the communication port interlude, selector switch SW1 placed " ", and diode D3, D4 will connect; When receiver placed communication port terminal, SW1 placed " end ", and diode D3, D4 disconnect.
Power circuit 26 is made of integrated circuit (IC) chip U9 (preferred 7805), rectifier bridge B2, AC transformer T4, capacitor C 24, C25.
The receiver panel which is provided with the binding post that is used for two four-wire channel test usefulness as shown in Figure 5, and binding post divides the user side and the side of communicating by letter, and each side all is provided with and sends terminal T
XWith reception terminal R
X
Four-line loop testing flow process of the present invention as shown in Figure 7, its step is as follows:
One, at first with the input of instruction control unit, the receiving terminal R that output signal line is connected to tested four-wire channel
XWith transmitting terminal T
X, or split type input display unit is connected to receiving terminal R
X, with the signal of monitoring loopback.
Two, on the instruction control unit panel, select tested object, adjust output signal level according to channel levels.
Three if carry out call test, then selector switch placed phone P or phone T, pressed initiating key 2 seconds, if passage is normal, then can hear dialing tone, can call then to add their confirmation; If can't hear dialing tone, illustrate that then telephone channel or four-wire channel have fault, need at first get rid of the fault of four-wire channel, if the four-wire channel fault-free then should be the problem of telephone channel.
Four if carry out the test of four-wire channel, places four lines eventually selector switch, pressed initiating key 2 seconds, if passage is normal, and then can loop-back test signal; As do not have the test signal loopback, illustrate that then tested passage has fault; Selector switch is placed four lines again, pressed initiating key 2 seconds, if loopback signal is arranged, interlude then is described, and passage is normal before, and fault should be at back segment; If no signal loopback still, interlude then is described before passage fault is arranged.
Five, further check the noise situations of passage by quiet key, when pressing quiet key, if passage is good, then no signal is returned, and loud speaker is sounding not.
If six have the signal loopback, but its level and frequency anomaly then illustrate channel abnormal.
Seven, confirm that passage is normal, then press end key, make distal channel recover; Local terminal also should recover, and makes communication port recover normal operating conditions; Undesired as passage, then tissue repairing according to circumstances.
Do not finish test if eight press end key, then distal channel can be recovered after about 2 minutes automatically.
Nine, EOT.
In actual applications,, can combine this device and terminal board, make active " an intelligent terminal board " for existing communication system, as with user's interface, the inside should contain two groups or above circuit unit, to adapt to the needs of dual-channels communication.Can carry out the far-end monitoring easily by this terminal board, reach as reinforcement and replenish the communication system monitoring function.This device is not subjected to the restriction of transmission equipment (as optical fiber, microwave, carrier wave, cable etc.) and combination thereof.Receiving system also can be built in the communication equipment end, or the correct position of subscriber equipment front end.Device fabrication manufacturer can use the principle of this device, increases this loopback test function in the terminal connections case that its equipment speech channel exports or disposed, and detects to make things convenient for the user.
The present invention is not limited to above-mentioned execution mode, anyly all will fall within the scope of protection of the present invention the method and apparatus that four line communication ports carry out loopback test with instruction control unit and receiver.
Claims (18)
1, a kind of communication port four-line loop testing method, it is characterized in that, this method is to send command signal and test signal by the instruction control unit that is located at communication control center, this command signal and test signal transfer to the receiver that is located between apparatus for remote communication and the subscriber equipment through communication port, receiver is according to the signal instruction disconnect user that receives, and test signal is looped back to control centre, control centre is according to having or not the parameter of signal loopback or loopback signal to judge whether communication port is normal.
2, communication port four-line loop testing method according to claim 1 is characterized in that, this method is the transmitting terminal (T at some four line communication ports to be tested
X) and receiving terminal (R
X) port carries out terminal test.
3, communication port four-line loop testing method according to claim 1 is characterized in that, the command signal that instruction control unit sends is a touch-tone signal, and it comprises the signal A that carries out call test with audio frequency or pulse mode; Carry out the signal B of interlude four line signal loopback tests; Carry out the signal C of terminal four line signal loopback tests and finish all tests, the signal D that communication port is recovered.
4, communication port four-line loop testing method according to claim 1 is characterized in that, comprises level height, frequency and noise by the parameter of receiver loopback signal.
5, realize the testing apparatus of the described communication port four-line loop testing method of claim 1, it is characterized in that, it is made of instruction control unit (1) and receiver (2), wherein instruction control unit is arranged at communication control center, receiver then places between apparatus for remote communication and the subscriber equipment, and, also can be built in communication equipment end or subscriber equipment front end as its connection interface.
6, testing apparatus according to claim 5, it is characterized in that, described instruction control unit (1) comprises pulse/dual-tone multifrequency and the command generator (11) that is used to send, measuring signal generator (12), test selector switch (13), audio amplifier circuit (14), be used to receive and show the input display unit (15) and the power circuit (19 of loopback signal,) wherein pulse/dual-tone multifrequency and command generator link to each other with the test selector switch, measuring signal generator links to each other with the test selector switch, audio amplifier circuit respectively with the transmitting terminal (T that tests selector switch and controller
X) and receiving terminal (R
X) link to each other, the input display unit is connected in the receiving terminal (R of controller
X); On the panel of instruction control unit (1), be provided with the dialing keyboard (16), test selector switch switch plate (131), start button K2 (132), conclusion button K3 (133), mute button (134), the level that link to each other with above-mentioned corresponding component and adjust knob (17), Headphone Volume Control (18) and mains switch (191).
7, testing apparatus according to claim 6, it is characterized in that, described pulse/dual-tone multifrequency and command generator (11) are made of dialing keyboard (16), integrated circuit (IC) chip U1 (111) and peripheral circuit thereof, its peripheral circuit comprises crystal oscillator XT1, relay J 1, triode Q1 and resistance R 1～R3, wherein, crystal oscillator XT1 links to each other with integrated circuit (IC) chip, and relay J 1 and triode Q1 are connected in the said integrated circuit chip and test between selector switch (13) K1, K2, the K3.
8, testing apparatus according to claim 6, it is characterized in that, described measuring signal generator (12) is made of integrated circuit (IC) chip U2 (121) and peripheral circuit thereof, and wherein integrated circuit (IC) chip U2 is the function generator circuit, and the sine wave of 1KHZ of getting its generation is as test signal; Its peripheral circuit comprises potentiometer W3～W5, capacitor C8, C9 and resistance R 8～R12, and wherein potentiometer W4, W5 link to each other with integrated circuit (IC) chip, and potentiometer W3 two ends link to each other with test selector switch (13) with integrated circuit (IC) chip U2 respectively with C1 through capacitor C 8.
9, testing apparatus according to claim 6, it is characterized in that, described test selector switch (13) comprises selector switch K1, start button K2 (132) and conclusion button K3 (133), wherein selector switch K1 comprises three groups of K1-1, K1-2, K1-3, every group all has four gears, four gears respectively respective pulses phone, voice frequency telephone, four lines (in) and four lines (end) test.
10, testing apparatus according to claim 6 is characterized in that, described audio amplifier circuit (14) is made of integrated circuit (IC) chip (141), (142).
11, testing apparatus according to claim 6, it is characterized in that described input display unit (15) can be the loud speaker that sound shows, also can be frequency meter, level meter that numeral or pointer show, they can be built in the controller, also can place outside the controller.
12, testing apparatus according to claim 11, it is characterized in that, described input display unit (15) is by raise one's voice (151), integrated circuit (IC) chip U4 and peripheral circuit thereof constitute, said integrated circuit chip U4 input is through capacitor C 6, potentiometer W2, audio frequency isolating transformer T2 links to each other with the controller receiving terminal, and through capacitor C 7, resistance R 7 links to each other with selector switch K1, its output is through capacitor C 4, C5, resistance R 6 connects loud speaker, its peripheral circuit comprises audio frequency isolating transformer T2, potentiometer W2 and capacitor C 4～C7, its sound intermediate frequency isolating transformer is connected in the receiving terminal of instruction control unit.
13, testing apparatus according to claim 5, it is characterized in that, described receiver (2) includes dual-tone multifrequency receiving circuit (21), decoding circuit (22), monostable trigger-action circuit (23), level and impedance matching circuit (24), selector switch (25) SW1, power circuit (26) and control the relay J 4 that four wire loops return, the relay J 2 of J5 and control phone loopback, J3, wherein the dual-tone multifrequency receiving circuit links to each other with four line receiving terminals (RX) and decoder respectively, decoder links to each other with monostable trigger-action circuit, monostable trigger-action circuit links to each other with relay, and relay J 4, J5 is respectively through audio frequency isolating transformer T5, the communicate by letter receiving terminal (RX) of side of T6 and four lines links to each other with transmitting terminal (TX), relay J 2, J3 links to each other with the user side phone with the communication side of phone respectively, and level and impedance matching circuit are connected in relay J 4, between the J5.
14, testing apparatus according to claim 13, it is characterized in that, described dual-tone multifrequency receiving circuit (21) is made of integrated circuit (IC) chip U6 (211) and peripheral circuit thereof, its peripheral circuit comprises a dual-tone multifrequency input coupling circuit (212), delay circuit (213) and capacitor C 13, resistance R 15, crystal oscillator XT2, dual-tone multifrequency input coupling circuit wherein is by capacitor C 22, C23, resistance R 16, R25, R26 constitutes, this circuit is connected between integrated circuit (IC) chip U6 and the four line receiving terminals, delay circuit is by resistance R 13, R14, capacitor C 12 and triode Q2 constitute, this circuit and integrated circuit (IC) chip U6, U7 links to each other.
15, testing apparatus according to claim 13 is characterized in that, described decoding circuit (22) is made of integrated circuit (IC) chip U7 (221) and peripheral circuit thereof, and its peripheral circuit comprises diode D2～D6, capacitor C 14, C15 and resistor chain RES.
16, testing apparatus according to claim 13, it is characterized in that, described monostable trigger-action circuit (23) is divided into two groups, each is made of integrated circuit (IC) chip U8A, U8B and peripheral circuit, its peripheral circuit comprises by capacitor C 16, resistance R 18, reaches the delay circuit and the diode D7～D10 of capacitor C 17, resistance R 19 formations.
17, testing apparatus according to claim 13 is characterized in that, described level and impedance matching circuit (24) are made of resistance R 27～R32.
18, testing apparatus according to claim 13 is characterized in that, described relay J 2～J5 is double-point double-throw switch, the public terminated communications side phone output of J2 wherein, normally closed termination substation; The answer load resistance R24 of machine of the Chang Kaiduan of the public termination J2 of J3, and link to each other with level and impedance matching circuit (24), the Chang Kaiduan of J3 by capacitor C 19, C20; The J4 common port side joint receiving end (R that communicates by letter with four lines
X) link to each other normally closed termination four line user side receiving terminal (R
X), Chang Kaiduan then connects level and impedance matching circuit; The common port of the J5 side transmitting terminal (T that communicates by letter with four lines
X) link to each other normally closed termination four line user side transmitting terminal (T
X), Chang Kaiduan then connects level and impedance matching circuit; J2～J5 is last and be connected to diode D11～D14, and is serially connected with triode Q3～Q6, resistance R 20～R23.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99121182 CN1115851C (en) | 1999-11-01 | 1999-11-01 | Four-line loop testing method and device for communication channel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99121182 CN1115851C (en) | 1999-11-01 | 1999-11-01 | Four-line loop testing method and device for communication channel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1257371A CN1257371A (en) | 2000-06-21 |
| CN1115851C true CN1115851C (en) | 2003-07-23 |
Family
ID=5281842
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99121182 Expired - Fee Related CN1115851C (en) | 1999-11-01 | 1999-11-01 | Four-line loop testing method and device for communication channel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1115851C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100426909C (en) * | 2005-08-23 | 2008-10-15 | 华为技术有限公司 | Base station controller and flow detecting method in mobile exchange center calling process |
| CN100396137C (en) * | 2005-09-28 | 2008-06-18 | 华为技术有限公司 | A interface circuit turn-on detecting method and device |
| CN103345240A (en) * | 2013-06-21 | 2013-10-09 | 云南电网公司玉溪供电局 | Automatic detection device of electric telecontrol channel |
| CN103399211B (en) * | 2013-08-14 | 2015-09-16 | 烽火通信科技股份有限公司 | The proving installation of Z interface subscriber loop resistance and method of testing |
| CN111669255B (en) * | 2020-07-09 | 2023-05-12 | 深圳市信锐网科技术有限公司 | Communication equipment network port loopback test method, device, circuit, equipment and medium |
| CN112098480B (en) * | 2020-09-03 | 2022-08-09 | 河北地质大学 | Electrochemical sensor change-over switch with adjustable channel quantity |
-
1999
- 1999-11-01 CN CN 99121182 patent/CN1115851C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1257371A (en) | 2000-06-21 |
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