KR920005044Y1 - Portable telecommunication line tester - Google Patents

Abstract

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Description

Portable track testing machine

1 is a circuit diagram of a portable line tester according to the present invention.

2 is a view showing the front operation panel of the tester with each other in the present invention.

* Explanation of symbols for main parts of the drawings

12: intermittent signal generator 20: bell signal generator

43: gauge 51: test handset jack

52: test jack 53: extension test card jack

54: Code jack for external test 58: Call code terminal

SW1: Internal test switch SW2: External test switch

SW3: Tone Discharge Switch SW4: Recall Switch

SW5: Test / call selection switch SW6: Arrangement, originating switch

SW8: Capacitance Switch

SW9, 10: switch for earth-to-earth insulation and bullet horn measurement

SW11: Electronic / mechanical selector switch SW12: Response switch

100: power supply unit 200: rectification and smoothing circuit unit

300: intermittent signal generator 400: bell signal generator

500: measurement signal generator 600: tone ring rejection

700: control panel

The present invention is suitable for the installation, relocation and troubleshooting of a telephone, and particularly relates to a portable track tester that can be independently and quickly and efficiently work anytime and anywhere without being commissioned by a telephone station laboratory.

Conventional testers for new hypotheses or transfers of telephones, troubleshooting or testing were not only difficult to transport because of their large volume and mechanical construction, but also frequent failures.

Accordingly, the present invention has been made in view of the above circumstances to provide a line tester that is compact and convenient to carry and has a low failure rate.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Figure 1 shows a circuit diagram of a portable line tester according to the present invention, the AC power is applied to the 100V / 200V selector switch 2 through the power switch 1 in the power supply unit 100, the switch ( 2) If it is at the contact point, 100V power is supplied to the primary side of the transformer (3), and the switch (2) is In the case of the contact, 220V power is applied to the primary coil of the transistor 3, and when the power switch 1 is turned on, the power lamp 4 is operated.

The AC power induced at the secondary side of the transformer 3 is full-wave rectified by the rectifying diodes 5 and 6 in the rectifying and smoothing circuit section 200, and then by the coils 7 and 8 and the capacitors 9 to 10. Distortion loss is converted to DC power. In this way, the converter DC power is applied to the intermittent signal generator 12 in the intermittent signal generator 300, where the intermittent signal generator 12 is controlled by the resistors 13 and 14 and the capacitors 15 and 16. Frequency signal (about 1,000 HZ) is generated and applied to the base of the transistor 18 via the bias resistor 17.

As the transistor 18 is turned on, a current flows in the primary coil of the line transformer 19 so that a voltage is induced in the secondary coil thereof and applied to the bell signal generator 20 in the value signal generator 400. The bell signal generator 20 generates a predetermined frequency signal by the resistors 21 and 22 and the capacitors 23 and 24 to the push pull amplification transistors 27 and 28 through the resistors 25 and 26. Allow it. At this time transistors 27 and 28 is to amplify the input signal line by boosting a voltage of the bar, the line transformer (29) which is applied to the primary side of the transformer teuraenseo 19 of about 75V~90V AC signal _(Z 16~25H Is generated). Here, the line transformer 19 generates an intermittent signal to the subscribing electronic telephone when the tone transmitter (SW3) is operated so that the transmitter and the receiver of the pressurized telephone are misplaced, and the line transformer 29 informs the subscriber. To provide a ringing signal to the subscriber's own telephone when the call switch SW4 is operated to make a call.

On the other hand, the high-voltage converter 30 in the measurement signal generator 500 generates a predetermined frequency signal by the resistor 31 and the capacitor 32 to operate the transistor 33, the transistor 33 is input The signal is amplified and applied to the primary coil of the transformer 34.

At this time, the secondary coil of the transformer 34 generates a high voltage (for example, 300V), and the diode 35 and the capacitor 36 rectify the high voltage. The resistor 37 and the zener diode 38 maintain a constant voltage and are supplied to the mega-ohm (M 옴) terminal through the resistor 39. As shown in FIG. 1, the kilo-ohm (K 1) terminal is connected to the primary coil of the transformer 34 via the resistor 40 and the variable resistor 41, where reference numeral 42 denotes a volt ( Volt) Shunt resistance for measurement is indicated, such a kilo ohm, mega ohm or voltage Volt is indicated on the gauge 43.

In addition, the upper portion of FIG. 1 illustrates the ron ring rejection 600. The signals 75V to 90V and 16 to 26H _Z input through the call termination terminal 58 pass through the capacitor 44 to allow a plurality of diodes. After full-wave rectification by the bridge diode of 45A to 45D, it is applied to the oscillator 46.

At this time, the oscillator 46 outputs a predetermined oscillation signal by the resistor 47 and the condenser 48 to operate the speaker 50 via the coupling capacitor 49.

In FIG. 1, reference numeral 700 denotes an operation unit for operating the apparatus of the present invention, and SW1 and SW2 denote internal test switch and external test switch, respectively. The tester plugs a test song and a handset plug (not shown) into the jack 51, plugs a test cord into the test jack 52, connects the extension test cord to the jack 53, When SW1) is pressed, a test wire is formed between the tester and the internal tester, and when the external test switch SW2 is pressed while the external test code is connected to the jack 54, the test wire is formed with the external tester. Here, one end of the test cord connected to the jacks 52, 53, and 54, respectively, is formed with two clips respectively contacting the tip of the telephone line and the ring terminal.

And the telephone line to which the internal and external test clips are connected should use the number.

The user's handset is plugged into the TR jack (51), the internal test cord into the jack (53), the external test cord into the jack (54), and the clip of each test cord is connected to the telephone line. When (SW1) is pressed, the tester can talk to the test strip connected to the jack 53, and when the switch (SW2) is pressed, the tester can talk to the external tester connected to the jack 54, and these switches ( When both SW1 and SW2) are pressed, a three-way call can be made between the tester and the internal and external testers.

And, in Fig. 1, the tone switch SW3 is for generating an alarm signal when the subscriber's telephone and receiver cannot be placed because the telephone is incorrectly placed, and the call switch SW4 is for calling the writer. The switch SW5 is operated when calling and making a call using a line test or a dial, and occupies the position shown in FIG. 1 during a line test, and occupies the opposite position when calling and making a dial. In addition, the incoming / outgoing switch SW6 is a switch for connecting a call between the test client and the tester in the outside (site) by using a telephone.

On the other hand, when the switch SW7 is located at the MΩ terminal, both insulation and short-circuit between the wires are measured. When the switch SW7 is located at the KΩ terminal, the loop resistance of the line is measured.

And when the mechanical capacity switch (SW8) is pressed, the needle of the gauge 43 is moved according to the model of the telephone. When the switch SW9 is pressed, the ground-to-earth insulation and other horns of L2 are measured. When the switch SW10 is pressed, the ground-to-ground insulation and other horns of L1 are measured.

55 is a dialing circuit, SW11 is an electronic / mechanical mode selection switch, SW12 is a call switch (SW4) to call the subscriber, and when the subscriber picks up the receiver, the answer is pressed to talk to the subscriber When the switch is not displayed, the subscriber will be disconnected from the call if not pressed again.

1 and 2 will be described in detail with reference to the operation of the present invention configured as described above.

FIG. 2 shows the front panel of the line tester shown in FIG. 1. The tester first connects the tester's transmitter and receiver to the TR jack 51, and plugs the test plug into the test jack 52. FIG. The extension test cord or the external test cord is inserted into the internal test jack 53 or the external test jack 54, respectively. Then, the tester connects the telephone line withdrawn from the telephone office switchboard (not shown) to the incoming and outgoing terminal 58. In addition, the two clips at one end of the test plug inserted into the test jack 52 are brought into contact with the telephone line of the subscriber to be tested.

Then, the tester places the test / call switch SW5 as shown in FIG. 1, and when the switch SW7-A is pressed, the insulation resistance between subscriber telephone lines is displayed on the meter 43, and the switch SW7- Press C) to display the DC voltage, and press the switch SW7-B to display the loop resistance of the line on the meter 43. In addition, when the capacitive switch (SW8) is pressed while the switch (SW7-A) is pressed, the instructions of the instrument (43) are moved. This switch (SW8) is for checking whether a telephone is connected. The functions of these switches SW7-A, B, and C are well known in conventional circuit testers.

When the handset of the subscriber's telephone is incorrectly placed on the telephone main body in the state where the preparation for the test is completed, when the tester presses the tone transmitting switch SW3, the switch SW3 is shown in Fig. 1 as shown in Fig. 1. It is located at the contact point. At this time, the intermittent signal generated by the intermittent signal generator 12 in the intermittent signal generator 300 is applied to the ⓑ contact of the tone output switch SW3 in the case of the transistor 18 and the line transformer 19. Then, the tone transmission signal is delivered to the subscriber telephone via the test code connected to the test jack 52 via the switches SW3 and SW4, thereby forcibly pressing the subscriber telephone.

At this time, when the subscriber recognizes the tone transmission signal and picks up the receiver, when the tester turns off the tone transmission switch SW3 to talk to the subscriber, the switch SW3 returns to the contact ⓐ, in which case the investigator is shown in FIG. The response switch SW12 is pressed to place the switch SW12 shown in FIG. 1 at the ⓐ-contact. Therefore, since the switches SW3, SW4, and SW12 are all located at the ⓐ-contact point, the circuit of the tester and subscriber connected to the test jack 52 connected to the test jack, the receiver, and the receiver connected to the TR jack 51 is configured. You can talk between them. Of course, when the switch SW12 is off, the switch SW12 is returned to the contact point, so that the call between the subscriber and the tester cannot be made.

On the other hand, if the subscriber wants to call at random (at this time, it is assumed that the handset of the subscriber's telephone number is correctly placed on the telephone body), and the tester presses the call switch SW4 to place its contact point at the ⓑ-contact. When the call switch SW4 is located at the ⓑ-contact, the bell signal generated by the bell signal generator 20 in the bell signal generator 400 is transmitted to the switch SW4 through the line transformer 29 and then the test jack. The ring circuit of the subscriber's telephone is activated by passing it to the subscriber's telephone via the test cord connected to (52), and the subscriber receives the call. In this case, when the subscriber wants to make a call, the examiner can make a telephone call between the subscriber and the tester by operating the response switch as described above.

Next, explain the case where you want to talk with the tester and the extension or external tester.

In this case, the telephone line coming from the switchboard is connected to the incoming / outgoing call terminal 58. The tester presses the call signal switch SW6 and presses the test / call switch SW5. At this time, the switch SW5 shown in FIG. 1 is located at the b-contact and the switch SW6 is turned on.

In addition, two clips are attached to a test cord (not shown) connected to the internal test jack 53 or the external test jack 54, and these clips are in contact with the endless telephone line so that the internal tester or the external tester A tester telephone call carrying the device of the present invention can be made.

For example, when talking to an extension tester connected to the test jack 53, the tester turns on the switches SW5 and SW6 and also switches on the switch SW1 as described above. Then, when the telephone number of the station tester is pressed using the dial 55, the ring signal generated from the dial circuit 55 is transmitted to the exchange through the incoming / outgoing terminal 58 in the case of the switches SW5 and SW6, and the exchange In this case, by sending a ring signal to the telephone line of the station tester, it is possible to make a telephone call between the station tester and the tester who owns the device.

As can be seen from FIG. 1, when the switches SW1 and SW2 are turned on, three-way calls can be made.

As described above, the tester according to the present invention is a small portable centralized line tester with multi-purpose functions such as circuit breakdown of cable housed in the concentrating device station, rotation switching, and new telephone hypothesis. As a result, it has the effect of efficient and efficient operation.

Claims (1)

A rectification and smoothing circuit unit 200 for supplying a DC voltage without a hum or noise of power to the telephone line, and an intermittent signal generator 300 for generating an interrupted signal by operating on the rectified signal; The portable line tester includes a bell signal generator 400 for generating a bell signal of the telephone, a measurement signal generator 500 and a tone ringer circuit 600 for generating a signal indicating a state of the telephone line. In; A tester's song, a song to which the handset is connected, and a receiver jack 51; A test jack 52 capable of inserting a test cord connected to a subscriber's telephone line; Internal and external test code jacks 53 and 54 to which internal and external test codes can be inserted so as to be able to communicate with the internal and external testers; A dial circuit (55) for providing a dial signal to enable communication with the internal and external testers; An incoming / outgoing switch SW6 and a test / call switch SW5 which are activated when calling the above-mentioned internal and external testers; Internal and external test switches (SW1, SW2) which are operated during a call with the tester and the internal and external testers; A line transformer 19 and a tone transmitting switch SW3 for transmitting an interruption signal generated by the interruption signal generator 300 to the subscriber's phone when the transmitter and the receiver of the subscriber telephone are left unattended; A line transformer 29 and a call switch SW4 for transmitting the bell signal generated by the bell signal generator 400 to the subscriber telephone when the subscriber calls; Portable line tester, characterized in that it comprises a control unit 700 made of a response switch (SW12) for making a call with the subscriber when the subscriber calls.