JPH062877U - Communication line connection status identification device - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a communication line connection status identification device capable of easily confirming a communication line from which a terminal device has been removed. [Structure] Connection means 11a, 11b and function switching means 1
2, signal monitor circuit 13, and polarity switching means 14
A first voltage comparator 15, a light emitting diode 16, and
The main body 10 is formed by the second voltage comparator 17 and the line connection status identifying means including the buzzer 18, and the line identifying element 20 is attached to form the apparatus.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a wiring board for connecting a communication line connected to a terminal device to a communication cable, identifying a line to be removed from a plurality of pairs of communication lines housed in the wiring board, and identifying the core of the line. It relates to a device for line contrast.

[0002]

[Prior art]

 FIG. 3 is an explanatory diagram of an embodiment of a conventional communication line connection status identifying method.

In the metallic communication network, a plurality of pairs of communication lines connected to the terminal devices 21, 22 and 23 of a plurality of users are collectively housed in the wiring board 30 and then connected to the small capacity communication cable 40. Further, these cables are collected, connected to a large capacity cable, and connected to the exchange through the unmanned station 50. In the case of a dedicated line, it is directly connected to the terminal device 25.

When the terminal device 23 is removed and the communication line is used for another purpose, in order to confirm the communication line from which the terminal device has been removed on the wiring board side, The line was monitored, and the line to which no DC voltage was applied or the line where no signal was detected was determined to be the removed line.

Further, when there are a plurality of lines to be removed, it is necessary to compare the cores of the lines to be paired, but conventionally, the audible signal generator 1 was connected to the terminal of the line from which the terminal device was removed, A continuous sound, an intermittent sound, a melody, a specific voice, etc. of the audible signal was played, and the audible signal detector 2 was connected to the terminal of the wiring board to confirm that it was a pair wire.

[0006]

[Problems to be solved by the device]

 However, even if no DC voltage is applied to the communication line for checking the connection status as described above, and no signal is detected, the line is a dedicated line and the power supplies of the terminal devices on both sides are If it was dropped, it would be as described above, so it was judged that the line was a removal line, and there was a possibility that the line would be accidentally removed.

Further, even if the audible signal is sent to the communication line from which the terminal device has been removed and the monitor device confirms that the paired line is a paired line, the polarity of the paired line cannot be determined. .

There is a problem in that if the audible signal is mistakenly sent to the working line, the user is annoyed.

Except for the above-mentioned problems, the present invention aims to provide a device capable of confirming a withdrawn line and affecting the core line of the line (polarity judgment) without affecting the working line. To do.

[0010]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides a pair of color-coded connecting means for connecting a communication line connection status identifying device to each communication line via a terminal of a wiring board. Function switching means for switching between the function of monitoring the signal of the communication line connected by the means and the function of identifying the connection status of the line, a signal monitor circuit for amplifying and monitoring the communication signal, and the communication line Polarity inversion means for inverting the polarity of the DC voltage applied to the communication circuit and a voltage corresponding to the change in the line resistance value of the communication line when the polarity is reversed by the means. And a first voltage comparator for generating an output when the corresponding voltage is within a first predetermined range by applying Light emitting diode that lights up depending on the output A second voltage comparator that compares the corresponding voltage with a second reference voltage and produces an output when the corresponding voltage is within a second predetermined range; and the output of the comparator. A main body composed of a line connection status identifying means formed by a buzzer connected to an end and ringing by the output and a DC power source, and a pair of color-coded pairs connectable to a terminal of the communication line to be removed. The connecting means with lead wire, and the line discriminating element formed of a diode and a fixed resistor connected in series with the connecting means.

[0011]

[Action]

 According to the present invention, since the device is configured as described above, the device of the present invention is sequentially connected to each communication line through the connecting means to the terminal of the wiring board that connects the communication cables, and the function switching means is provided. The signal monitoring circuit monitors the presence or absence of a signal, and the line connection status identifying means applies a voltage that changes depending on the line resistance of the communication line to the first and second voltage comparators. Then, the connection status of the communication line can be easily identified by comparing with the reference voltage and lighting the light emitting diode connected to the output of the comparator and whether or not the buzzer sounds. Further, the core identification can be performed by connecting to the terminal side of the line from which the line identifying element is removed and using the line connection status identifying means.

[0012]

【Example】

 FIG. 1 is a block diagram of an embodiment of the present invention.

In FIG. 1, 10 is a device main body of the present invention, 11a and 11b are connecting means, and a pair of red and black lead wire alligator clips, 12 is a function changeover switch, and 13 is a The signal monitor circuit includes an amplifier 13a and a speaker 13b. Reference numeral 14 denotes a polarity reversing switch which is a non-locking push button type. In a normal state (when the switch is not pressed), + voltage is applied to the alligator clip 11a and − voltage is applied to 11b, and when the switch is pressed, (−) respectively. , (+) Are inverted and applied. Reference numeral 15 is a first voltage comparator, and 16 is a light emitting diode (hereinafter referred to as a lamp). A first reference voltage obtained by dividing the voltage E of the power supply 19 by the resistors R1 and R2 is applied to the-input terminal of the first voltage comparator 15 and is applied to the + input terminal. When the voltage drops below the first reference voltage by a predetermined value or less, the lamp 16 is turned on.

Reference numeral 17 is a second voltage comparator, and 18 is a buzzer. A second reference voltage obtained by dividing the voltage E of the power supply 19 by the resistors R3 and R4 is applied to the-input terminal of the second voltage comparator 17, and this voltage is the first reference voltage. It is set higher than the voltage, and the buzzer sounds when the voltage applied to the + input terminal falls below the second reference voltage. To the + input terminals of the first and second voltage comparators 15 and 17, the resistance value of the sum of the line resistance of the communication line connected by the connecting means 11a and 11b and the resistance R6 and the resistance value of the resistance R5 are connected. A voltage obtained by dividing the power supply voltage E by the ratio is applied. Therefore, if the connection status of the communication line to be connected changes, the line resistance changes. If the line resistance is in the MegΩ range, neither the lamp nor the buzzer will operate. When the value becomes lower, the buzzer 18 continues to ring, and when it becomes 10 kΩ or less, the lamp 16 lights up.

Reference numeral 20 is a line identification element, which is formed by connecting a resistor R and a diode D in series to a pair of alligator clips 20a and 20b with lead wires colored red and black.

FIG. 2 is an explanatory diagram showing an example of how to use the device of the present invention.

In FIG. 2, the same parts as those in FIG. 3 described above are denoted by the same symbols.

As shown in FIG. 2, in the wiring board in the relay station in which the working line and the removal line coexist, work to remove the jumper wire connecting the cable containing the removal line and the core of the next cable When doing so, the connection status of each communication line is identified using the device of the present invention so that the jumper wire of the working line is not accidentally removed. At this time, if the line identification element is connected to the terminal of the communication line from which the terminal device is removed, the core wire comparison (polarity judgment) can be easily performed.

FIG. 4 is an explanatory diagram of a communication line connection status identification procedure using the device of the present invention. The operation procedure will be described below with reference to FIG.

1. The device of the present invention is connected to the confirmation line, and the function changeover switch 12 is switched to the monitor side.

2. The presence or absence of a signal is confirmed, and if there is, it is determined to be the working line.

3. If there is no signal, the function selector switch 12 is switched to the confirmation side, and the polarity selector switch 14 is operated (ON / OFF).

[0023] 4. It is monitored whether the buzzer 18 is turned on / off and the lamp 16 blinks by the operation of the preceding paragraph.

4.1 If there is no change in the buzzer 18 and the lamp 16, it is determined that the jumper wire is an open circuit (removed circuit).

4.2 If the buzzer 18 continues to ring and the lamp 16 remains lit, it is determined that the leased line is in use.

4.3 The line in which the buzzer 18 sounds or stops is determined as the line to which the line identification element is connected to the terminal side and the line to be removed. (The polarity of the core wire can be checked by the polarity of turning on and off.) 4.4 If the buzzer 18 and the lamp 16 are turned on and off, it is determined that the public line to which the DC voltage is applied is in use. (In addition, since the DC voltage is applied to the active public line, it can be identified by a tester, etc.)

[0027]

[Effect of device]

 As described in detail above, if the device of the present invention is used, not only the communication signal is monitored but the connection status of the line is identified by a buzzer sounding and a lamp blinking, and the removal line is checked and the core wire is checked. The effect is that it can be done quickly. In addition, conventionally, when performing core wire comparison using an audible signal, it is expected that an audible signal will be accidentally sent to the working line and troubles such as annoying the user can be eliminated.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing an example of how to use the device of the present invention.

FIG. 3 is an explanatory diagram of an example of a conventional communication line connection status identification method.

FIG. 4 is an explanatory diagram of a communication line connection status identification procedure using the device of the present invention.

[Explanation of symbols]

 1 audible signal generator 2 audible signal detector 10 communication line connection status identification device body 11a, 11b connection means 12 function changeover switch 13 signal monitor circuit 13a amplifier 13b speaker 14 polarity changeover switch 15 first voltage comparator 16 light emitting diode 17 Second voltage comparator 18 Buzzer 19 Power supply 20 Line identification element 21, 22, 23, 24, 25 Terminal device 30, 50a Wiring board 40 Communication cable 50 Unmanned station

Claims (1)

[Scope of utility model registration request] 1. A communication line connection status identification device for confirming a communication line to be removed among a plurality of pairs of communication lines housed in a wiring board, wherein the identification is made for each communication line via a terminal of the wiring board. A pair of color-coded connecting means with leads for connecting the device, a function switching means for switching a function of monitoring a communication signal of a communication line connected by the means, and a function of identifying a connection status of the line. A signal monitor circuit for amplifying and monitoring the communication signal, and a polarity reversing means for reversing the polarity of the DC voltage applied to the communication line for identifying the connection status of the communication line, and the polarity reversing means by the means. A voltage corresponding to a change in the line resistance value of the communication line is applied and compared with a first reference voltage, and an output is generated when the corresponding voltage is within a first predetermined range. Voltage A comparator, a light emitting diode connected to an output terminal of the comparator and lit by the output, and the corresponding voltage and a second reference voltage are compared, and the corresponding voltage is within a second predetermined range. , A main body composed of a second voltage comparator for producing an output and a line connection status identifying means formed by a buzzer connected to the output end of the comparator and sounding by the output, and a DC power source. And a pair of color-coded connecting means with leads connectable to the terminal of the communication line to be removed, and a line identifying element formed by a fixed resistor and a diode connected in series with the connecting means. A communication line connection status identification device characterized by: