JPH03162163A - Terminal tester - Google Patents

Abstract

PURPOSE:To perform a test by carrying freely a testing machine to an arbitrary measuring spot by providing a battery for an operating power source. CONSTITUTION:A battery 15 constitutes a main power source for operating a device, and a necessary power source is distributed and supplied to each part in the device through a DC stabilizing circuit 16 connected to the battery 15. Also, a battery remaining quantity detecting circuit 17 detects the capacity of the battery 15, and when the capacity runs short, this information is outputted to a control circuit, and based on this information, a control circuit displays shortage of the remaining quantity on an indicator and informs it to a maintenance person. Subsequently, by the supply of the power source from the battery 15, items of plural electric characteristics related to a subscriber line of a subscriber's home side and a terminal equipment are tested from a maintenance disassembly point in a subscriber line. In such a way, a moving measurement can be executed in an arbitrary place instead of a test board, and the work efficiency can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a terminal tester, which is comprised of a subscriber line and a test device for testing this line.

[Prior Art] For example, when a problem occurs in a subscriber's line or a terminal, and a user reports a malfunction such as a malfunction in the telephone line, a test person in the failure reception department checks the subscriber's line from the center station test stand. They also conducted characteristic tests on the terminals to determine whether they were good or bad, and based on the results, they made arrangements for repairs to the maintenance department.

By the way, according to this method, the dial pulse characteristics depend on the terminal itself. PB (Push Button) Judging the quality of signal frequency characteristics and identifying the point of failure.Specifically, characteristics related to the characteristics of telephone lines including subscriber terminals, drop-in lines, and lines, such as insulation resistance, capacity, external voltage, and loop resistance. Even if it is possible to determine the quality of the product and the PB signal level, it is difficult to identify the location of the defect occurrence point.

To explain further, in the past, when detecting and repairing a defect, a test person would detect the defect, notify the maintenance person, and the maintenance person would go to the customer's home security equipment, which is the demarcation point for maintenance. After separating the terminal equipment and the line using a protector and connecting a simple communication tester (referred to as a Brest) to the line side of the safety device, a characteristic test between the test stand and the protector was conducted from the test stand to detect any malfunctions. If the point of occurrence is found and no defect is found in the characteristics between the test stand and the protector, the next step is to find the point of occurrence of the defect by sequentially changing the test section between the test unit and the rosette in the subscriber's premises using the same method. was working.

[Problems to be Solved by the Invention] However, in the above-mentioned work, a test stand must always be used to measure characteristics and determine pass/fail, and as the number of failure reports from users increases, the test stand Even if a maintenance worker arrives at the maintenance demarcation point due to a light congestion situation,
There was a problem in that a characteristic test could not be carried out immediately, resulting in redundant time waiting for a test stand response.

Therefore, the present invention was made in view of the above-mentioned problems, and its purpose is to enable mobile measurement at any location in place of a test stand, and to identify the point of occurrence of a malfunction when a user reports a malfunction. The purpose of the present invention is to provide a terminal tester that can be quickly discovered.

[Means for Solving the Problems] In order to achieve the above object, the terminal tester according to claim 1 of the present invention is provided with a storage battery for an operating power source, and is provided with It is characterized by a configuration that tests multiple electrical characteristic items related to user lines and terminal equipment.

The terminal tester according to claim 2 further includes a storage means for storing standard values defined for each of a plurality of measurement items related to the subscriber line and the terminal device, and a storage means for selectively switching the plurality of measurement items. In addition, means for automatically switching between the lines of the subscriber line and between the subscriber line and the ground according to the selected measurement item, and means for determining the quality of the measured value of the selected measurement item. It is characterized by the fact that it is equipped with

Furthermore, the terminal tester according to claim 3 further includes a storage means for storing standard values defined for each of a plurality of measurement items related to the subscriber line and the terminal device, and a storage means for selectively switching the plurality of measurement items. Also, means for automatically switching between the lines of the subscriber line and between the subscriber line and the ground according to the selected measurement item, and means for determining the quality of the measured value of the selected measurement item. , a charging pulse generating means for outputting charging pulses, and a first subscriber line driving circuit that controls the driving of the line state between the terminal device on the subscriber line side.

The terminal tester according to claim 4 further includes a simple call tester and a second switch which supplies a sending current to the simple call tester and controls the driving of the line state between the terminal device on the subscriber line side. It is characterized in that it is equipped with a subscriber line driving circuit, and communicates with the terminal device of the subscriber line tester via the simple call tester.

[Operation] By supplying power from the storage battery, a plurality of electrical characteristic items related to the subscriber line and terminal equipment on the subscriber's home side are tested from the maintenance disassembly point on the subscriber line.

In addition, during measurement, multiple measurement items related to subscriber lines and terminal equipment are selectively switched, and depending on the selected measurement item, automatic measurement is performed between subscriber lines and between subscriber lines and the ground. The quality of the measured value and the standard value stored in advance in the storage means is determined.

Furthermore, by installing a billing pulse generation circuit, a subscriber line drive circuit, and a simple call tester, it operates in a manner similar to a switchboard, making it possible to perform station transfer functions and public phone billing tests. (Presto) can be used to conduct a two-way call test with the terminal under test.

[Embodiment] FIG. 1 is a block diagram showing an embodiment of a terminal tester according to the present invention, and FIG. 2 is a diagram showing a line connection state between an exchange and a subscriber's premises.

The terminal tester according to this embodiment tests a plurality of electrical characteristics of a subscriber line and a terminal device on the subscriber's premises from a maintenance disassembly point.
, the first switch 4, the second switch 5, the storage means 6, the billing pulse generation circuit 7, the first subscriber line drive circuit 8, the worst value detection circuit 9, the PB signal reception circuit 10. It is composed of a good/bad judgment circuit 11, a second subscriber cotton driving circuit l2, a simple call tester (Presto) 13, and a display l4, and the maintenance person presses the operation button 1 while visually checking the display 14. By operating it, each function is switched and a selected predetermined test is carried out.

Although not particularly shown in the drawings, this terminal tester has a small and lightweight structure so that it can be easily carried.

The control circuit 2 supplies the first and second switching devices 4.5, the billing pulse generation circuit 7, and the first subscriber line driving circuit 8 with control signals corresponding to the push signals of the operation button 1. .

The control circuit 2 also performs arithmetic processing on the outputs supplied from the PB signal receiving circuit 10 and the good/bad judgment circuit 11, and outputs a display signal to the display 14 in accordance with the processing results.

The measuring circuit 3 includes an insulation resistance measuring circuit 3a that measures the insulation state of the line, a loop resistance measuring circuit 3b that measures the loop resistance during a call, a capacitance measuring circuit 3c that measures the capacitance between lines and between one line and the ground, and a DC and It is configured with an external voltage measuring circuit 3d that measures an AC external voltage,
Each circuit is connected to the first switch 4 by a control signal supplied from the control circuit 2 based on the press of the operation button 1 by a maintenance person.
is automatically selected by switching.

The second switch 5 is operated between lines (L, -L.) or between lines and ground (L, -L.) according to a control signal from the control circuit 2.
G. L,'-G) are automatically selected.

The storage means 6 stores predefined standard values for measurements such as insulation resistance measurement, loop resistance measurement, capacitance measurement, external voltage measurement, PB signal characteristic measurement, and dial pulse characteristic measurement.

The billing pulse generating circuit 7 outputs a predetermined billing pulse to the first subscriber line driving circuit 8 in response to a control signal output from the control circuit 2 based on the press of the operation button 1 by a maintenance person.

The first subscriber line drive circuit 8 includes a station change circuit 8a, a DP (dial pulse) detection circuit 8b, a current supply circuit 8C, and a hybrid circuit 8d.

The station switching circuit 8a is a feeding polarity switching circuit for simulating the operation of an exchange, and is operated by a control signal supplied from the control circuit 2 in response to a button operation by a maintenance person. The DP detection circuit 8b detects dial pulses supplied from the terminal under test via the station change circuit 8a.

The current supply circuit 8C supplies speech current to the terminal under test.

The hybrid circuit 8d is a second subscriber line drive circuit 12.
Together with the buffer 12a and the hybrid circuit 12b, it distributes audio signals and adjusts the level for mutual communication.

The worst value detection circuit 9 detects the maximum deviation of the worst value of the dial pulse speed from the standard value of the dial pulse speed stored in the storage means 6 as the worst value of the dial pulse supplied from the DP detection circuit 8b, and detects the maximum deviation of the dial pulse speed from the standard value. As a result, the detected dial number and the worst measured value are output to the good/bad judgment circuit 11.

The PB signal receiving circuit 1O receives the PB signal from the terminal under test connected to the line and outputs it to the control circuit 2, and the state at that time is displayed on the display 14.

The good/bad judgment circuit 11 performs a test between lines (L1-L2) regarding each measurement item selected by a button operation by a maintenance person.
, the measurement results carried out between the line and the ground (L.-G, L.-G) are compared with the standard values set and stored in advance in the storage means 6 to determine their quality. is processed by the control circuit 2, and the results and measured values are displayed on the display 1.
4 will be displayed.

Regarding the measurement of the loop resistance, the value between the lines (L.-L*) is determined and displayed on the display 14 without the involvement of the second switch 5.

In addition, the pass/fail judgment circuit 11 judges whether the detection dial number supplied from the worst value detection circuit 9 and the worst value which is the measured value is good or bad, and this pass/fail result is processed by the control circuit 2 and displayed on the display l4. will be displayed.

The second subscriber line driving circuit 12 includes a buffer 12a, a hybrid circuit 12b, and a current supply circuit 12c, and the current supply circuit 12c constitutes a maintenance worker side call current supply circuit for mutual calls, Simple call tester l3
supplies telephone current to the

Next, FIG. 3 shows a circuit configuration of a power supply provided in the same housing as each of the circuits described above.

The storage battery 15 serves as a main power source for operating the device, and the required power is distributed and supplied to each part of the device through a DC stabilizing circuit 16 connected to the storage battery 15. In addition, the storage battery remaining amount detection circuit l7 detects the capacity of the storage battery 15, and when the capacity becomes low, it outputs this information to the control circuit 2, and the control circuit 2 indicates the insufficient remaining amount on the display l4 based on this information. It is displayed and notified to the maintainer.

Next, the operation of the terminal tester configured as described above will be explained.

The terminal tester according to this embodiment is arranged at each disassembly point P. , p. , security device 18 installed in the PI,
The terminal under test connection terminal 2l and the earth connection terminal 22 are connected to the rosette 20 and the terminal device 19, and various characteristic measurements and tests are performed.

First, the terminal under test connection terminal 21 and the earth connection terminal 2
2 to the device at the decomposition point to be measured. In this state, when the maintenance person selects a measurement item and inputs settings using the operation button 1, this information is supplied to the control circuit 2. Then, the control circuit 2 outputs a control signal to the first switch 4 and switches the measurement circuit 3 (3a to 3) selected by the operation button l.
d). At the same time, the control circuit 2 outputs a control signal to the second switch 5 to output a control signal between the lines (L, -Lx) and between the line and the ground (L.-G.Lx).
-G) is automatically switched. As a result, measurement is performed using the selected measurement circuit 3, and the results are good and good.
It is output to the defective judgment circuit 11 and compared with the standard value set and stored in the storage means 6 in advance. After this pass/fail result is processed by the control circuit 2, the pass/fail result and the measurement result are simultaneously displayed on the display 14.

In this way, a plurality of measurement items related to subscriber lines and terminal equipment can be measured using the two switching devices 4 based on the input of the operation button l.
, 5 are sequentially selectively switched and measured, thereby shortening the measurement time.

On the other hand, when the dial pulse test is selected by the control circuit 2, the DP detection circuit 8b in the first subscriber line driving circuit 8 detects the dial pulse from the terminal under test 19 and outputs it to the worst value detection circuit 9. The worst value detection circuit 9 detects the maximum deviation from the standard value of the worst value dial pulse speed of the dial pulse make rate stored in the storage means 6 from the detected dial pulse, and uses the detected dial number and the measured value as the detection result. A certain worst value is output to the good/bad judgment circuit 11. The pass/fail judgment circuit 11 judges whether the detection dial number from the worst value detection circuit 9 and the worst value which is the measured value is good or bad, and the control circuit 2 displays the result and the measured value on the display 14.

In this way, the dial speed of the dial pulse characteristic test,
Regarding the make rate, whereas conventionally the average value within the same digit was displayed, the worst value is displayed, so that the discrepancy between the actual operation and the displayed value can be reduced.

By the way, since this terminal tester is equipped with a billing pulse generation circuit 7, it operates in a pseudo manner as an exchange, and this tester can be used in place of the terminal device 19 in the subscriber's premises for station change function and public telephone billing tests. can be carried out simultaneously.

This terminal tester also includes a second subscriber line driving circuit l.
Since it is equipped with a simple call tester 13 to which a transmitting current is independently supplied by the current supply circuit 12c in 2, it is possible to carry out a two-way call test with the terminal under test l9 in the subscriber's premises even without a telephone set. can.

Therefore, the terminal tester of the above-mentioned embodiment is constructed of a simple device equipped with a storage battery, and can be moved anywhere in place of the test stand to perform various measurements without occupying the test stand as in the past. Measurements can be made and work efficiency can be improved.

In addition, since a single device can measure the characteristics and perform operation tests on all kinds of terminal devices, it can be easily operated by maintenance workers alone, and the quality can be determined without depending on the knowledge level of the maintenance worker. be able to.

By the way, in the above-mentioned embodiment, a case has been described in which various electrical characteristics are measured and tested at the subscriber's premises with the maintenance disassembly point P1 as the boundary, but in FIG. Disassembly points other than the above, such as the connecting terminal tube 25 and the switch 2 disposed between the switch 24 and the safety device 18.
4 can also be connected to perform measurements. in this way,
By connecting the terminal tester of this embodiment closer to the subscriber's home than the exchange 24, maintenance personnel can directly perform measurements on the spot without occupying the test stand 23. can be done.

[Effect of the invention 1 As explained above, the terminal tester according to claim 1 according to the present invention is equipped with a storage battery for the operating power source, so the tester can be freely carried to any measurement point and used for various electrical Characteristic tests can be carried out.

Further, according to the terminal tester of the second aspect, a plurality of measurement items related to the subscriber line and the terminal device can be sequentially switched and measured, thereby shortening the measurement time.

Furthermore, according to the terminal tester of the third aspect, since it operates in a manner similar to a switchboard, it is possible to carry out a station change function and public telephone billing test.

Further, according to the terminal tester of claim 4, since it is possible to communicate with the terminal device on the subscriber line side via the simple call tester, a two-way call test can be performed with the terminal under test even in the absence of a telephone. can be done.

[Brief explanation of the drawing]

Fig. 1 is a block configuration diagram showing an embodiment of the terminal tester according to the present invention, Fig. 2 is a diagram showing the line connection state between the exchange to which the terminal tester is applied and the subscriber's premises, and Fig. 3 is the same. FIG. 2 is a diagram showing a circuit configuration of a power supply in a terminal tester. l...operation button, 2...control circuit, 3...measuring circuit, 4...first switch, 5...second switch,
6...Storage means, 7...Charging pulse generation circuit, 8.
...l-th subscriber line drive circuit, 1l...good/bad judgment circuit, l2...second subscriber line drive circuit, 13.
・・Simple call tester, l5・・11 batteries (battery), l
9...Terminal device.

Claims (4)

[Claims] (1) It is characterized by being equipped with a storage battery as an operating power source and having a configuration for testing a plurality of electrical characteristic items related to the subscriber line and terminal equipment on the subscriber's home side from the maintenance disassembly point in the subscriber line. Terminal tester. (2) storage means for storing standard values defined for each of a plurality of measurement items related to subscriber lines and terminal devices;
Means for selectively switching the plurality of measurement items and automatically switching between lines of subscriber lines and between the subscriber line and ground according to the selected measurement items, and the selected measurement 1. A terminal tester comprising means for determining whether the measured value of an item is good or bad. (3) storage means for storing standard values defined for each of a plurality of measurement items related to subscriber lines and terminal devices;
Means for selectively switching the plurality of measurement items and automatically switching between lines of subscriber lines and between the subscriber line and ground according to the selected measurement items, and the selected measurement A means for determining the quality of the measured value of the item, a charging pulse generating means for outputting a charging pulse, and a first subscriber line driving circuit for controlling the driving of the line state between the terminal device on the subscriber line side. A terminal tester characterized by: (4) Equipped with a simple call tester and a second subscriber line driving circuit that supplies a transmitting current to the simple call tester and controls the driving of the line state between the subscriber line side terminal device. 4. The terminal tester according to claim 3, wherein the terminal device communicates with the terminal device on the subscriber line side via the simple call tester.