JP2001007772A - Defective part locating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To quickly and precisely locate a defective part. SOLUTION: The location of the defective part of a relay transmission system 100, having plural relay systems Yi(i=1 to n) serially connected through outgoing transmission lines Li(i=0 to n) and incoming transmission lines Ui(i=0 to n) is executed by a maintenance testing device X and a maintenance return device Z. The relay system Yi is provided with a first switch Di a second switch Ci and a relay inspecting circuit Fi, and the first switch Di connects the relay inspecting circuit Fi with the outgoing transmission line Li or the incoming transmission line Ui, and the second switch Ci returns the outgoing transmission line Li-1 to the incoming transmission line Ui-1, or connects the relay system Yi with the incoming transmission line Ui-1. A test signal IS from the maintenance testing device X is inspected by the relay inspecting circuit Fi and a maintenance inspecting circuit B of the maintenance testing device X. A part TK for locating a defective part locates the defective part by collating the inspected result with the defective part locating table of the defective part storing part MF.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fault location specifying device for specifying a fault location of a relay device.

[0002]

2. Description of the Related Art Heretofore, through a downlink transmission line and an uplink transmission line,
Relay transmission composed of multiple relay devices connected in series
As shown in FIG. 5, in the fault location identifying device of the system,
The maintenance test device X is replaced with the first-stage relay device Y₁ Connect to the final stage
Relay device Y_n After that, connect the maintenance wrapping device Z and perform the maintenance test
The test signal IS from the device X is sequentially folded by a remarkable relay device.
Return and perform the line test. Repeater is folded
Switch C and D transmit upstream transmission for return
Turns back to the road. Test signal generation times for maintenance test equipment X
The test signal IS from the path A passes through the downlink transmission path and
Switch C is looped back by the relay device connected to the loopback side.
Test signal of the maintenance test device X
Circuit B is reached. The maintenance inspection circuit B
Signal IS has arrived or the test signal IS
Inspect for normal or abnormal. The maintenance test apparatus X has such a configuration.
The inspection is performed by the maintenance test device X and the relay device Y₁ Run between and then
Maintenance test equipment X and relay equipment Y_Two Run between and then
Next, the maintenance test device X and the relay device Y _n Run between failures
The location is specified.

[0003]

In conventional fault identifying apparatus as described above that SUMMARY OF THE INVENTION Problem to] When detecting a line failure in the middle of the test, to identify a fault section, the maintenance test device X and between the relay apparatus Y ₁ Since the test must be restarted from the test described above, a large amount of test time is required, and there is a problem that the service to the end user is interrupted. Furthermore, in the conventional fault location identification apparatus, for testing of sequentially folded from the relay apparatus Y _1, the problem of failure part is specified whether it is to one or the downlink transmission path is an uplink transmission path is not possible Had. SUMMARY OF THE INVENTION An object of the present invention is to solve such a conventional problem, and to provide a failure location specifying device capable of extremely short test time and specifying a failure location in detail.

[0004]

A fault location identifying apparatus according to the present invention is a fault location identifying apparatus for a relay transmission system comprising a plurality of relay apparatuses connected in series via a downlink transmission line and an uplink transmission path. A test signal generating means for generating a test signal for testing the relay transmission system and sending the test signal to the relay transmission system; a maintenance inspection means for inspecting a test signal from the relay transmission system;
A maintenance test device having a failure location storage means for storing a failure location identification table for identifying a failure location;
The relay device includes: a return switching unit that selects and returns the downstream transmission line to the upstream transmission line; a branch switching unit that branches and connects any one of the downstream transmission line or the upstream transmission line; Means for inspecting the test signal from either the downlink transmission line or the uplink transmission line branched and connected by means; and the downlink from the last-stage relay device of the relay transmission system. A maintenance folding device having folding means for folding the transmission line back to the upstream transmission line;

Further, in the fault location specifying apparatus according to the present invention, the return switching means of the relay device may connect the downlink transmission line by returning to the upstream transmission line or connect the relay device to the upstream transmission line. It is characterized in that either connection is selected and switched.

Further, in the fault location specifying apparatus according to the present invention, the fault location specifying table of the fault location storage unit includes a test result of the first test means of the relay device and a test result of the maintenance test means of the maintenance test device. And a table indicating the location of the failure corresponding to.

In the fault location identifying apparatus according to the present invention, the last-stage relay apparatus may include a second inspection unit for inspecting a return connection from the upstream transmission line to the downstream transmission line by the return switching unit. It is characterized by having.

Further, in the fault location specifying device according to the present invention, the maintenance return device has a return inspection means for inspecting the downstream transmission path connected to the maintenance return device and the return device of the maintenance return device. It is characterized by the following.

In the fault location specifying apparatus according to the present invention, the fault location specifying table of the fault location storage unit may be configured to store the inspection result of the first inspection means and the inspection result of the second inspection means of the relay device and the maintenance result. It is a table showing a failure location corresponding to the inspection result of the folding inspection unit of the folding device and the inspection result of the maintenance inspection unit of the maintenance testing device.

Further, in the fault location specifying device according to the present invention, the maintenance test device may be configured such that the branch transmission unit selectively connects the downstream transmission line to the first inspection unit and the return switching unit connects the downstream transmission line to the first inspection unit. The test signal is transmitted from the test signal generation means to the relay device selectively connected to the uplink transmission path, and a fault location is specified by the fault location identification table.

[0011]

Next, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram of a fault location device according to a first embodiment of the present invention. FIG. 2 is a block diagram of a fault location device according to a second embodiment of the present invention. FIG. 3 is a configuration diagram of a failure location identification table of the failure location identification device according to the first embodiment of the present invention, and FIG. 4 is a configuration of a failure location identification table of the failure location identification device according to the second embodiment of the present invention. FIG. 5 is a block diagram of a conventional failure point identification device.

Referring to FIG. 1, an apparatus for locating a fault in a device according to a first embodiment of the present invention includes a downlink transmission line L _i (i = 0,
Through n) and a plurality of relay devices Y _i (i = 1,... N) connected in series via the upstream transmission line U _i (i = 0, n). Identification of
The test is performed by the maintenance test device X and the maintenance return device Z.

The relay device Y _i (i = 1,... N) includes a first switch D _i (i = 1,... N) and a second switch C _i (i = i = n).
1, to n) and a relay inspection circuit F _i (i = 1, to n).

[0015] The first switch _{D i (i = 1, ~n} ) is contact _{MD i (i = 1, ~n} ) contacts RD _{i (i} = 1, ~
n) or the contact SD _i (i = 1,... n) to connect the relay inspection circuit F _i (i = 1,... n) via the connection point H _i (i = 1,. Downlink transmission line L _i (i = 1,
.. N) to connect or connect to a connection point K _i
(I = 1,..., N), the uplink transmission line U _i (i = 1,.
Branch from n) and connect. Here, the connection points H _i is the connection point of the relay apparatus Y _i and downlink transmission line L _i, the connection point K _i is the connection point of the relay apparatus Y _i and the uplink transmission path U _i.

Second switch C_i (I = 1, up to n)
Tentacle MC_i (I = 1, up to n) is the contact RC_i(I = 1, ~
n) or SC_i(I =, ~ n)
Downlink transmission line L_i-1 (I = 1,..., N) at the connection point G_i (I =
1, through n) the upstream transmission path U _i-1 (I = 1, up to n)
Or to the relay device Y_i (I = 1, ~ n)
Uplink transmission line U_i-1 (I = 1, to n). here
And the connection point G_i Is the relay device Y_iAnd downlink transmission line L_i-1 When
Connection point.

The relay inspection circuit F _i (i = 1,..., N) inspects the test signal IS from the downstream transmission line L _i-1 or the upstream transmission line U _i, and carries out a maintenance test by the monitoring line ML. Notify device X.

The maintenance test device X has a test signal generation circuit A, a maintenance inspection circuit B, a collection unit HT, a fault location storage unit MF, a specific unit TK, and a specific fault location output unit OUT.

The test signal generating circuit A, the test signal IS to generate a test signal IS is a signal for testing the relay transmission system 100, and sends to the relay transmission system 100 via a downlink transmission line L _0.

The maintenance test circuit B checks receives the test signal IS from the up transmission line U _0.

The collection unit HT collects the inspection results from the relay inspection circuit F _i (i = 1,..., N) and the inspection results from the maintenance inspection circuit B of the relay device Y _i , and collects these inspection results. Notify the specific unit TK.

The fault location storage unit MF stores a fault location identification table 200.

As shown in FIG. 3, the failure point identification table 200 stores the inspection result of the maintenance inspection circuit B and the relay inspection circuit F.
₆ is a table showing fault locations that can be specified in correspondence with _i (i = 1,..., n) test results. The fault location in the fault location identification table 200 is determined as to which relay device has failed, and
It indicates which of the relay devices is the fault, and also indicates whether the fault occurs on the upstream transmission line or the downstream transmission line. Can be tabulated in this way finely the failure location is because each of the relay devices exist relay test circuit F _i to Y _i can use the test results.

The specifying unit TK specifies the fault location by comparing and checking the inspection result from the collecting unit HT with the fault location specifying table 200 of the fault location storage unit MF, and sends the specified result to the specific fault location output unit OUT. Notice.

The specific fault location output unit OUT is provided with a specific unit TK
The failure location specified by is output as a display or the like.

The maintenance fold unit Z, having a Ori back portion E folding the downlink transmission line L _n to the up transmission line U _n.

Next, the operation of the embodiment of the present invention will be described in detail with reference to the drawings. In the description herein, unless otherwise specified, the relay device Y _i is the relay device Y _i (i = 1,..., N), and (i = 1,.
Is omitted. The same applies to other subscripts i.

The service of the relay transmission system 100 shown in FIG.
Before starting the screw, the relay device Y_i First switch D_i 
Is the contact MD_i To the contact RD_i By connecting to
Relay inspection circuit F_i Down the transmission line L_i Connected to, and
Relay device Y_i Second switch C _i Is the contact MC_i Connect
Point SC_i To the relay device Y_i Uphill
Route U_i-1 Is set to connect to

The maintenance test apparatus X, a test signal IS that the test signal generation circuit A is generated, via a downlink transmission line L _0, the first switch D _i and the second switch C _i is set as described above It is sent to the relay transmission system 100. Test signal I
S passes through the relay devices Y ₁ , Y ₂ ,..., Y _n and is turned back at the turn-back portion E of the maintenance turning device Z, and again, the relay devices Y _n ,.
₂ , Y ₁ and the maintenance test equipment X via the upstream transmission line U _0.
Reaches the maintenance inspection circuit B.

[0030] and maintenance inspection circuit B of the relay test circuit F _i and maintenance testing apparatus X of the relay apparatus Y _i is normally detecting the test signal IS, relay checking circuit F _i is the contact of the first switch D _i MD _i is connected to the contact SD _i and the second switch C _i
To connect the contacts MC _i to contact RC _i.

Thus, the relay transmission system 100
Is set to a test mode in which a failure point can be specified, and the service is started.

When a failure occurs in the relay transmission system 100 in service when set to the test mode, the maintenance test device X and the maintenance turnaround device Z specify the location of the failure.

[0033] In FIG. 1, the maintenance test apparatus X, a test signal IS, the relay transmission system 1 via the down transmission line L ₀
Send to 00.

The relay inspection circuit _Fi and the maintenance inspection circuit B
It is checked whether the test signal IS from the maintenance test device X has been normally detected or whether the test signal IS has been abnormally detected, including the case where the test signal IS cannot be detected, and these test results are sent to the maintenance test device X.

The collection unit HT of the maintenance test apparatus X collects the inspection results from the relay inspection circuit _Fi and the inspection results from the maintenance inspection circuit B, and notifies the specific inspection unit TK of the collected inspection results.

The specifying unit TK specifies the fault location by comparing and checking the inspection result from the collecting unit HT with the fault location specifying table 200 of the fault location storage unit MF, and sends the specified result to the specific fault location output unit OUT. Notice.

The specific fault location output unit OUT is provided with a specific unit TK
The failure location specified by is output as a display or the like.

As described above, according to the first embodiment of the present invention, which relay device is faulty, which relay device is faulty, and whether the fault is an uplink transmission line or a downlink Also specify whether it is occurring on the transmission path. Further, the fault of each relay device and each transmission line of the relay transmission system is specified simultaneously and in a short time by applying the test signal IS once.

Next, a fault location specifying device according to a second embodiment of the present invention will be described.

In FIG. 2, the fault location device according to the second embodiment of the present invention has a turn-back inspection circuit _Pz in the maintenance turn-over device Z, and the last-stage relay device Y _n immediately before the maintenance turn-over device Z. The configuration is the same as that of the fault location specifying apparatus according to the first embodiment except that the fault location specifying unit 201 has the relay test circuit _Pn and the fault location storage unit MF has the fault location specifying table 201 of FIG. Therefore, in the description of the failure point identification device according to the second embodiment of the present invention, only the portions different from the first embodiment will be described.

In FIG. 2, the turn-back inspection circuit P _z of the maintenance turn-back device Z is provided with a connection point G _z between the downstream transmission line L _n and the turn-back portion E.
The test signal IS is inspected via the monitoring line ML, and the inspection result is notified to the collection unit HT via the monitoring line ML.

The relay test circuit of the relay apparatus Y _n of the final stage P _n
Is a connection point T between the second switch C _n and the upstream transmission line U _n-1.
The test signal IS is inspected via C _n, and the inspection result is notified to the collection unit HT via the monitoring line ML.

As shown in FIG. 4, the failure point identification table 201 stores the inspection result of the maintenance inspection circuit B and the relay inspection circuit F.
_i (i = 1,..., n) in addition to the relay test circuit P _n
5 is a table showing the failure locations corresponding to the test results of the turn-back test circuit _Pz and the test results of the return test circuit _Pz .

Next, the operation of the relay apparatus fault location specifying apparatus according to the second embodiment will be described.

The collecting unit HT of the maintenance test apparatus X includes the inspection result from the relay inspection circuit _Fi , the inspection result from the maintenance inspection circuit B, the inspection result from the relay inspection circuit _Pn, and the turn-back inspection circuit _Pz.
And collects the test results, and notifies the specifying unit TK of the collected test results. The identification unit TK identifies the failure location by comparing and checking the inspection result from the collection unit HT with the failure location identification table 201 of the failure location storage unit MF, and notifies the specific failure location output unit OUT of the identification result. The specific fault location output unit OUT outputs the fault location specified by the specifying unit TK on a display or the like.

[0046] The second embodiment, the fault location of the intermediate apparatus Y _n maintenance fold unit Z and the final stage, can be identified by distinguishing the uplink transmission path U _n and downlink transmission line L _n.

[0047]

As described above, according to the present invention, each repeater has one test signal test circuit, and the test signal test circuit is switched to perform the test on the downlink transmission line and the test on the uplink transmission line. Which relay device has failed,
Then, it is possible to indicate which of the relay devices is the fault, and to finely specify whether the fault occurs on the upstream transmission line or the downstream transmission line. Further, according to the present invention, the test of all the trunk lines is performed simultaneously by applying the test signal once, so that the test time can be shortened and the fault location can be specified in a short time.

[Brief description of the drawings]

FIG. 1 is a block configuration diagram of a failure point identification device according to a first example of the present invention.

FIG. 2 is a block diagram of a failure point specifying device according to a second embodiment of the present invention.

FIG. 3 is a configuration diagram of a failure point identification table of the failure point identification device according to the first embodiment of the present invention.

FIG. 4 is a configuration diagram of a failure point identification table of the failure point identification device according to the second embodiment of the present invention.

FIG. 5 is a block diagram of a conventional failure point identification device.

[Explanation of symbols]

Reference Signs List 100 relay transmission system L _i down transmission line U _i up transmission line Y _i relay device D _i first switch C _i second switch F _i relay inspection circuit P _n relay inspection circuit X maintenance test device A test signal generation circuit B maintenance inspection Circuit HT collection unit MF Failure location storage unit TK identification unit OUT Specific failure location output unit Z Maintenance return unit E Return unit P _z Return inspection circuit 200, 201 Failure location identification table

Claims (7)

[Claims] 1. A fault location identifying apparatus for a relay transmission system comprising a plurality of relay devices connected in series via a downlink transmission line and an uplink transmission line; a test signal for testing the relay transmission system Test signal generating means for generating the test signal and transmitting the test signal to the relay transmission system, a maintenance inspection means for inspecting the test signal from the relay transmission system, and a fault location specifying table for specifying a fault location. And a maintenance test device having a failure point storage means for performing the operation. The relay device selects the downstream transmission path to the upstream transmission path and loops the return transmission path, and switches the downstream transmission path or the upstream transmission path. Branch switching means for branching and connecting any one, and the branch transmission means for branching by the branch switching means from either the downlink transmission line or the uplink transmission line First inspection means for inspecting a test signal; and a maintenance return device having return means for returning the downstream transmission line from the relay device at the last stage of the relay transmission system to the upstream transmission line in a fixed manner. A fault location identification device characterized by the following. 2. The return switching means of the relay device selects either the return connection of the downlink transmission path to the uplink transmission line or the connection of the relay device to the uplink transmission line. The failure point identification device according to claim 1, wherein the switching is performed by switching. 3. The fault location specifying table in the fault location storage unit indicates a fault location corresponding to a test result of the first check unit of the relay device and a test result of a maintenance check unit of the maintenance test device. The fault location specifying device according to claim 1, wherein the fault location specifying device is a table. 4. The apparatus according to claim 1, wherein the last-stage relay device has a second inspection unit for inspecting a return connection from the upstream transmission line to the downstream transmission line by the return switching unit. Fault location device as described. 5. The maintenance loopback device according to claim 1, wherein the maintenance loopback device has a return transmission path connected to the maintenance loopback device and a loopback inspection unit for testing the loopback means of the maintenance loopback device. Fault location device. 6. The failure point identification table of the failure point storage unit includes an inspection result of the first inspection unit and an inspection result of the second inspection unit of the relay device, and an inspection of the return inspection unit of the maintenance folding unit. 2. The fault location specifying device according to claim 1, wherein the fault location specifying device is a table indicating a fault location corresponding to a result and an inspection result of a maintenance inspection unit of the maintenance test device. 7. The maintenance test device, wherein the branch transmission unit selectively connects the downstream transmission line to the first inspection unit and the return switching unit selectively connects the downstream transmission line to the upstream transmission line. 7. The fault location specifying apparatus according to claim 1, wherein the test signal is transmitted from the test signal generation unit to the relay device, and the fault location is specified by the fault location specifying table.