KR200184438Y1 - Cable pair test and automatic jumper wire transfer system - Google Patents

Abstract

The present invention discloses a line test and a jumper wire automatic switching device that can facilitate the selection and transfer of a good transfer wire (core wire) in the case of troubleshooting or telephone construction work. This device is a jumper wire automatic switching device which connects several preliminary transfer lines and transfers them to the current line, and detects the resistance between the two lines, the resistance between one line and the ground, and the voltage between the preliminary transfer lines. After determining the abnormality of the line, it is possible to transfer to the spare transfer line without any abnormality.

Description

Cable test and automatic jumper wire transfer system

The present invention relates to a line test and a jumper wire automatic switching device, and more particularly, when a core wire failure of a telephone line cable occurs, when a core wire is replaced or a telephone installation work, The present invention relates to a jumper wire automatic switching device capable of accurately selecting a good core wire and performing an immediate change by testing for abnormalities.

In general, transfer spare wires have a lot of faults between the insulation state between two wires and the ground state caused by one wire contacting the ground. Therefore, a performance test is performed when the current line is replaced.

These tests are usually carried out in pairs of two persons, determined by the operation of applying a tone signal or other beep to confirm the good of the preliminary transfer lines.

However, the presence or absence of a preliminary transfer line is difficult to find by the signal tone, and it takes a long time to find a good line. Due to the hassle of these procedures, the on-site workers sometimes connected directly without testing the abnormal transfer line. However, in this case, if the connected core wire is bad, the work must be repeated again, and unnecessary time is wasted, and the switching device may malfunction.

Therefore, the present invention is to solve the problems of the prior art, the purpose of which is to test the electrical characteristics of the preliminary transfer line to easily determine the good line, and to quickly switch the line test and jumper wire automatic switching device Is in providing.

The device according to the present invention is to add a multi-tester function to the jumper wire automatic transfer device described in Korean Patent Application No. 98-13913 to more easily find a good line.

1 is an installation state diagram of the line test and jumper automatic switching device according to the present invention.

1 is a block diagram showing the configuration of the device in the present invention.

<Description of Symbols for Major Parts of Drawings>

2, 2a, 2b, 2c,: line 10: exchanger

20: terminal box 30: switching device

31: interface unit 32: switching unit

33: control unit 34: tone signal generation unit

35: display drive part 36: line selection part

37: multi tester 38: test selector

Line test and jumper wire automatic switching device for achieving the object of the present invention, after connecting a plurality of preliminary transfer line to the interface unit to any one of the jumper wire automatic transfer device to connect by switching to the current line In addition, the multi-tester unit for selectively detecting and displaying the resistance between the two lines, the resistance between one line and the ground, the voltage between the two lines, and the plurality of preliminary transfer wires are connected and select any one of the multi-tester section And a circuit selector for connecting and a test selector 38 for selecting a test item of the multitester unit.

Hereinafter, a line test and a jumper wire automatic switching device according to the present invention will be described in detail with reference to the accompanying drawings.

1 is an installation state diagram of the line test and jumper wire automatic switching device according to the present invention, referring to the drawing, the switching device 30 of the present invention accommodates four lines to be installed in the MDF of the telephone station. However, line capacity can be arbitrarily adjusted.

Specifically, the switching device 30 is installed by the field worker, and in the case of the repair of the cable core wire, the broken current line 1 line (2) and the spare switch line (2a) (2b) (2c) are connected. In case of a new telephone installation, four spare transfer lines are connected. Here, reference numeral 20 denotes a terminal box.

Figure 2 is a block diagram showing the configuration of the line test and jumper automatic transfer device according to the present invention. Referring to the drawings, the device 30 of the present invention is in addition to the configuration of the existing interface unit 31, the switching unit 32, the control unit 33, the tone signal generating unit 34 and the display driving unit 35 The circuit line selection section 36, the multi-tester section 37, and the test selection section 38 are configured.

The interface unit 31 is a portion to which each line necessary for the transfer, that is, the current circuit 2 and the three preliminary transfer lines 2a, 2b, and 2c are directly connected, and all connected external lines (current line, preliminary line) are connected. A dual tone multi-frequency (DTMF) signal input by the operator, that is, transmitted by the operator from the terminal box 20 side, is sent to the control unit 33.

The control unit 33 is a part that controls the overall operation of the ablation device, and according to the signal input from the interface unit 31, the predetermined control signal to the switching unit 32 and the display driving unit 35 It is sent out and operated.

The switching unit 32 selectively connects or shorts between the switch 10 connected to the interface unit 31 and the external lines 2, 2a, 2b, and 2c according to a control signal of the controller 33. The tone signal generator 34 and the external circuits 2, 2a, 2b and 2c are selectively connected or shorted.

The display driving unit 35 receives a control command from the control unit 33 and displays the current line connection state of the device 30 to the outside.

The tone signal generator 34 always generates tones of an audible frequency band necessary for matching core wires such as transfer lines or the like by the command of the controller 33.

The multi-tester unit 37 is a part for detecting and displaying the resistance between the two lines and one line and the ground, and the voltage between the two lines, and the test selector 38 includes the insulation resistance between the two lines, the insulation resistance between the one line and the ground, and the voltage. A switch for selecting a test item during a test is connected to the multitester unit 37.

The line selector 36 is a switch for selecting a core wire to be measured from four preliminary transfer lines 2, 2a, 2b, and 2c to be connected to the multitester unit 37. The interface unit 31 It is connected to all the transfer lines connected to).

In order to proceed with the line test and the transfer using the apparatus 30 of the present invention configured as described above, as shown in FIG. 1, the spare transfer lines (2a) (2b) (2c) to the interface unit 31 of the apparatus. ) And the current line (2), and connect the ground line to the ground terminal of the MDF.

Next, after the device 30 is turned on, the line selector 36 selects one line to be measured among the four lines connected to the device, and in the test selector 38, insulation resistance between one line and one line and ground are selected. It is selected so that necessary tests can be made during insulation resistance and voltage test.

Then, the performance of the selected line, that is, the resistance between the two lines, the one line and the ground, the voltage between the two lines, and the like are detected by the multitester unit 37 and the value thereof is externally transmitted through an insulation resistance meter and a voltmeter not shown in the figure. Is displayed.

In this way, by testing the transfer wire for abnormality, it is determined whether the insulation of the two wires is poor, the wires are in contact with each other, or the insulation between one wire and the ground is poor. Select another line to find a good line in the same way.

On the other hand, the control unit 33 operates the switching unit 33 in accordance with an external input signal instructing the connection between the switch 10 and a specific line (one of the current line and the switching line) to operate the switch 10 and the specific line. By connecting the transmission sound of the exchanger to be transmitted to a specific line, and also to drive the display drive unit 35 to display the operating state to the outside.

In addition, the control unit 33 operates the switching unit 32 in accordance with an external input signal instructing the transmission of the tone signal to connect the tone signal generator 34 to the remaining lines except for the line to which the dial tone is being transmitted. Let the signal go out. This information is displayed by the display driving unit 35 in the operating state.

The tone signal generator 34 generates various tone signals that can identify the line by adjusting the ON / OFF time of the tone signal, and different tone signals are transmitted to the external line through the switching unit 32. Will be sent.

After the installation of the switching device 30 in the telephone company, the field worker moves to the telephone pole or manhole where the terminal box 20 is installed, connects the test handset to the transfer line where the tone signal is being transmitted, and transmits the tone signal well. The transfer line is selected. Then, press the pre-designated number (DTMF signal) to distinguish the transfer lines according to the tone signal type (different ON / OFF time of the signal).

Then, the interface unit 31 detects the DTMF signal from the external line and sends the number information (control information) thereof to the control unit 33, and the control unit 33 switches the switching unit 32 according to the input value. Drive the jumper line to the corresponding line and cut off, send and block the tone signal for the remaining line, and operate the display driving unit 35 to display the operating state of the line.

In addition, the control unit 33 connects the ring tone to the selected transfer line until a specific DTMF signal is received, and the tone signal is continuously transmitted to the remaining lines, so that the field worker can switch as much as possible.

When the transfer is made, the transfer line is maintained using the trunk line so that the connection of the dial tone to the subscriber line is not interrupted even when the power supplied to the transfer device 30 is cut off.

When the work in the field is completed, the indicator information of the switching device 30 reports the jumper wire connection work using the actual jumper wire on the MDF, and all the work is completed.

As described above, the line test and the jumper wire automatic switching device according to the present invention prevents the malfunction of the switching device by testing the transfer wire to be switched in advance, thereby reducing work time by allowing the work to be performed quickly and accurately in the field. And manpower savings.

Claims (1)

A jumper wire automatic switching device which connects a plurality of spare transfer wires to an interface unit and transfers any one of these wires to a current line, further selecting resistance between both wires, resistance between one wire and ground, and voltage between both wires. A test selector for selecting a test item for detecting and displaying a multitester unit, a line selector connected to the plurality of preliminary transfer lines and selecting any one of the preliminary transfer lines, and a test item for the multitester unit. Line test and jumper automatic switching device characterized in that it further comprises a portion (38).