JPH0414931A - Method of specifying fault occurring section in line switching network - Google Patents

Abstract

PURPOSE:To specify the fault section of a switching line network inexpensively and surely in a short time by monitoring data between points of the line switching network and comparing the data with a central processing unit. CONSTITUTION:A CPU 15 compares a transmission data detected by a monitoring device 14a connected to the point A of a line between a terminal equipment 11a and an LC line concentrator 12a with a reception data detected by a monitoring device 14e connected to the point E of a line between a terminal equipment 11b and an LC line concentrator 12b. When both data are different from each other, it is detected that a line network between points A, E has a fault. Then the CPU 15 narrows the detection section of a line network between the points A and E as a comparison data between points A, C, data between points C, D, data between points D, E respectively. If the data between the points D and E are different from each other, it is specified that a section between the points D and E has a fault. Thus, the fault section of the switching line network is located inexpensively and surely in a short time.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to a faulty section identification method used for maintenance of circuit switched networks.

BACKGROUND ART FIG. 4 is a block diagram showing a conventional failure section identification method, in which 1a and 1b are terminals (DTE), 2a and 1b, respectively.
2b is an LC concentrator that accommodates the terminals 1a and 1b and performs traffic convergence; 3a and 3b are respectively,
In the above configuration, 4a and 4b are respectively protocol analyzers connected to the terminals 1a and 1b, and 5a and 5b are telephones for maintenance personnel A and B to make calls, respectively. , when a failure occurs between terminals 1a and 1b, maintenance personnel A and B first repair terminals 1a and 1b, respectively.
While monitoring the line status using protocol analyzers 4a and 4b near Ib, communication is made using telephones 5a and 5b, and data (for example, a sending pattern [ABCDJ) is sent out from one terminal 1a while taking timing.

Next, maintainer A monitors the sent data using the protocol analyzer 4a, and maintainer B monitors the sent data using the protocol analyzer 4b. The failure situation can be grasped by communicating the data through the six-talk machines 5a and 5b.

Problems to be Solved by the Invention However, in such a method, the terminals 1a, 1b
If the terminals 1a and 1b are located in a remote location, a large number of line concentrators 2a and 2b and exchanges 3a and 3b are installed between the terminals 1a and 1b.
, it is difficult to identify the call route 4, and when a failure occurs in a switching facility (inter-office), etc., it is impossible to identify the failed section.

In addition, even if the call route can be identified, a dedicated maintenance person must be stationed at each point of the line network to constantly monitor the communication content, and furthermore, in the case of intermittent failures, both maintenance personnel are required to Since synchronization is carried out by a person using a telephone or the like, there are problems in that maintenance costs are high and in reality it is difficult to identify faulty sections.

SUMMARY OF THE INVENTION In view of the above-mentioned problems, it is an object of the present invention to provide a method that can quickly, inexpensively, and reliably identify a faulty section of a switched line network.

Means for Solving the Problems In order to solve the above problems, the present invention includes a plurality of monitor means at a plurality of points on a line between terminals, and the monitor means synchronously monitors data at the points. , the fault occurrence section is identified by comparing data between points monitored by the monitoring means using a central processing unit.

Effect of the Invention The present invention uses the above-described method to compare data between each point of a circuit switched network using a central processing unit, so that a faulty section of a switched circuit network can be identified in a short time, at low cost, and reliably.

EXAMPLES Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram illustrating an embodiment of a method for identifying a faulty section in a circuit switched network according to the present invention; FIG. 2 is a transmission procedure diagram illustrating synchronization in FIG. 1;
FIG. 3 is an explanatory diagram of how to identify a faulty section in FIG. 1.

In FIG. 1, lla, 11.1) are terminals (DTE), and 12a and 12b are terminals 11, respectively.
The LC concentrators 13a and 13b that accommodate the terminals 11a1 and 13b respectively accommodate the terminals 11a1 and 13b and perform traffic convergence.
Exchange connecting b, 14a114b, 14C, 14
e is the line point between the terminal 11a and the LC line concentrator 12a)A, the LC line concentrator 12a and the exchange 13a, respectively.
Point B of the line between the exchanges 13a and 13b Point C1 of the line between the exchanges 13a and 13b Point D of the line between the exchange 13b and the LC line concentrator 12b, Point E of the line between the LC line concentrator 12b and the terminal 11b Monitor device connected to , 15 is
Monitor devices 14a, 14b, 14C, 14d, 14
．． 6 is the connected central processing unit (CPU).

Next, the operation of the embodiment according to the above configuration will be described in the case where the terminal 11a calls the terminal 11b and starts communication.

In FIG. 2, the terminal 11a makes a call (off-hook),
Exchange 13a sends a dialable signal to terminal 11a, and when terminal 11.2 dials terminal 11b, exchange 1.3b calls terminal 11b, and when terminal 11b responds, exchange 13a communicates with both terminals 11a and llb. The enable signal is transmitted and the terminal 1. la is terminal 1] and can transmit data to terminal b.

Monitor devices 14a, 14b, 14C, 14d,
14e is the terminal 11a, llb from the above exchange 13a.
Terminal 1 captures the communication enable signal from terminal 11a to terminal 1.
The data sent to 1b is collected synchronously.

Next, the case of specifying a faulty section will be explained with reference to FIG.

First, as shown in FIG. 3 (a), the CPU 15
, la and the LC line concentrator 12b. The received data (F
ll, 0.0.0.1.1, S), and if there is a difference between both data, it is possible to detect that there is a fault in the line network between points A and E.

Therefore, the CPU] 5 narrows the detection section of the line network between points A and E, and compares the data between points A and C as shown in FIG. Compare the data between points C1D as shown in Figure 3 (d).
The data between points D1E are compared as shown in FIG. Therefore, if there is a difference in data between points D and E, the DPU 15 can identify that there is a fault in the section between points D and E.

In the above embodiment, for the sake of explanation, two terminals 1. la, llb
For example, if a large number of terminals are located throughout the country, if the above monitor device is connected to points such as each terminal and exchange, one CPU
This makes it possible to identify a faulty section in a line network that has a large number of terminals.Therefore, there is no need to deploy maintenance workers all over the country, and the faulty section can be identified at low cost.

Furthermore, according to the above embodiment, it is possible to eliminate the time required to dispatch maintenance workers to measurement points across the country, the time required to make preparations such as telephone calls, and the time required to collate collected data. Faulty sections can be identified in a short time.

Furthermore, since all transmission paths including communication routes can be monitored at the same time, faulty sections can be reliably identified.

As described in detail, the present invention is configured to monitor data between each point of a circuit switched network and compare it using a central processing unit, so that the switched circuit network can be constructed in a short time, at low cost, and reliably. The fault section can be identified.

[Brief explanation of the drawing]

FIG. 1 is a block diagram illustrating an embodiment of a fault occurrence section identification method in a line transportation network according to the present invention, and FIG. 2 is a transmission procedure diagram illustrating synchronization in FIG. 1. FIG. 3 is an explanatory diagram for identifying a faulty section in FIG. 1, and FIG. 4 is a configuration diagram for explaining a conventional example. 11a, 1ltl...Terminal, 12a, 1.2b...
LC concentrator, 13a, 13b--exchange, 14a
, 14b, 14C, 14b. 14e...Monitor device, 15...Central processing unit (CP)
U). Name of agent: Patent attorney Shigetaka Awano and one other persontJ
2 map area

Claims (1)

[Claims] Failures can be detected by connecting multiple monitor means that synchronize and monitor data at each point to multiple points on the line between terminals, and comparing the data between the points monitored by the monitor means using a central processing unit. A method for identifying a section in which a fault has occurred in a circuit switched network, the method comprising identifying the section.