JPH0556042A - Fault discrimination system for plural line communication terminal equipments - Google Patents

Abstract

PURPOSE:To discriminate the state of a communication fault of a terminal equipment accurately momentarily. CONSTITUTION:Line fault detectors 14, 15 detect a fault of plural lines 12, 13 connecting to a terminal equipment A11. When the line fault detector detects a line fault, an alarm transmitter 16 sends fault information. The fault information from the alarm transmitter is sent to a central processing unit 17. The central processing unit is provided with a fault statistic information storage section 19 storing each fault of plural lines. Moreover, the central processing unit is provided with a line information storage section 18 storing the information as to the plural lines connecting to the terminal equipment. Furthermore, the central processing unit is provided with a communication fault discrimination section 20 discriminating the presence of a communication fault as the terminal equipment depending on the presence of the fault of each line connecting to the terminal equipment by retrieving the line information storage section and the fault statistic information storage section upon the receipt of the fault information from the alarm transmitter.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication failure detecting system for a communication terminal device, and more particularly to a communication failure determining system for a terminal device having a plurality of communication paths to which a plurality of lines are connected.

[0002]

2. Description of the Related Art In recent years, a variety of advanced processings have been performed in communication terminal devices, and the improvement of their reliability has become an important issue. Therefore, in many terminal devices, a plurality of communication lines are connected to one terminal device so that even if a failure occurs in one line, the communication failure of the entire terminal device is prevented by using another line. It has become to.

[0003]

In such a terminal device to which a plurality of lines are connected and which has a plurality of communication paths, it is a human being to judge whether the entire terminal device cannot communicate when a communication failure occurs. Made a comprehensive judgment, and not only it took time to make the judgment, but there was a possibility that the judgment could be incorrect. Furthermore, there has been a problem that the management of such communication failures becomes complicated as the number of installed terminal devices increases.

Therefore, it is an object of the present invention to provide a system capable of eliminating the above-mentioned conventional drawbacks and instantaneously determining the communication failure state of a terminal device.

[0005]

According to the present invention, a terminal device having a plurality of communication paths to which a plurality of lines are connected and a fault for each of the plurality of lines connected to the terminal device are provided. A line fault detecting device for detecting a line fault, an alarm transmitting device for transmitting fault information when a line fault is detected by the line fault detecting device, and a line for each of the plurality of lines based on the fault information from the alarm transmitting device. A fault statistical information storage unit that stores a fault, a line information storage unit that stores information about a plurality of lines connected to the terminal device, and a line information storage unit when fault information is received from the alarm transmission device. And a communication failure determination unit that searches the failure statistical information storage unit and determines whether there is a communication failure as the terminal device based on the presence or absence of a failure in each line of the terminal device. Failure determination system of multiline communication terminal apparatus comprising the is provided.

Further, according to the failure determination system of the present invention, a plurality of the terminal devices are provided, and the failure statistical information storage unit, the line information storage unit and the communication failure determination unit are included in the central processing unit. The central processing unit and a display device for displaying communication failure information from the communication failure determination unit of the central processing apparatus are commonly provided to the plurality of terminal devices.

Further, according to the failure judgment system of the present invention, the communication failure judgment unit of the central processing unit performs the judgment operation when the failure information is received from the alarm transmitter or when the line failure is recovered. Composed.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a fault judgment system for a multi-line communication terminal device of the present invention will be described below with reference to FIG.

The terminal device A11 is provided with a plurality of, for example, two lines 12 and 13, and line fault detecting devices 14 and 15 are provided on the respective lines. Line failure detection device 1
The output information of 4 and 15 is supplied to the alarm device 16.
The alarm device 16 generates line fault information indicating whether the line has a fault or the fault has been recovered (normal), and transmits this to a central processing unit described later. Generally, a plurality of such terminal devices and devices attached thereto are installed, but only one set is shown here for the sake of simplicity.

A common central processing unit 17 is provided for a plurality of such terminal devices. The central processing unit 17 comprises a line information storage unit 18, a failure statistical information storage unit 19 and a communication failure determination unit 20. The line information storage unit 18 stores line information for each terminal device. Information on the presence or absence of communication failure at the time of line installation is registered and stored in the failure statistical information storage unit 19 for all lines of all terminals. The information stored in the failure statistics information storage unit 19 regarding the presence or absence of a communication failure is updated by the information from the alarm device 16 of each terminal device. In other words, if there is a failure in a certain line, the failure will be changed from "No" to "Yes", and once a failure has occurred in a certain line, the failure will be changed from "Yes" to "No". The memory contents are rewritten.

The communication failure determination unit 20 is activated by the line failure information from the alarm device 16, and the line information storage unit 18 is activated.
And the failure statistics information storage unit 19 is searched. Then, for each terminal, it is checked whether or not there is a failure in all the lines connected to the terminal, and if there is a failure in all the lines, it is determined that "the terminal is incommunicable". In other words, if even one of the lines connected to the terminal is normal, it is determined that the terminal can communicate. The display device 21 displays the determination result of the communication failure determination unit 20.

Next, the operation of the fault judging system of the present invention shown in FIG. 1 will be described with reference to FIG. -Fault occurrence-When a line fault occurs, the line fault detection devices 14 and 15 detect the fault (Process 1) and transmit it to the alarm device 16,
The alarm device 16 reports the occurrence of the failure to the central processing unit 17 (process 2). The communication failure determination unit 20 that has received the line failure information from the alarm device 16 first updates the storage content of the failure area of the failure statistical information storage unit 19 in the storage area of the failed line to "presence".

Next, the line information storage unit 18 and the fault statistical information storage unit 19 are searched to find out which line other than the line in which the fault has occurred is connected to the terminal device connected to the fault line. Information on whether or not it is collected (process 3). Then, it is searched whether or not all the lines connected to the terminal device are in a failure state, and if there is a failure in all the lines, it is determined that "the terminal is incommunicable" (process 4). This determination result is sent to the display device 21 (process 5) and displayed (process 6).

-Fault recovery-When the line fault of a certain line is recovered, the line fault detection device 1
4 and 15 detect the failure recovery (process 1) and notify the alarm device 16 of the alarm device 16, and the alarm device 16 notifies the central processing unit 17 of the failure recovery (process 2). Upon receiving the line failure recovery information from the alarm device 16, the communication failure determination unit 20 first updates the storage content of the storage area of the line in which the failure has been recovered in the failure statistical information storage unit 19 to the failure “none”.

Next, the line information storage unit 18 and the fault statistical information storage unit 19 are searched to find out which line other than the line where the fault has been restored is connected to the terminal device connected to the line where the fault has been restored. Information on whether or not it is collected (process 3). Then, it searches whether or not all the lines connected to the terminal device other than the line where the current fault has been recovered are in a faulty state, and when all the lines have faults, "the terminal is in a communication-disabled state. However, it was restored ”(process 4). This determination result is sent to the display device 21 (process 5), and the communication restoration information is displayed on the display device 21 (process 6).

[0016]

As described above, according to the failure determination system for a multi-line communication terminal device of the present invention, when a communication failure occurs in a terminal device to which a plurality of lines are connected and which has a plurality of communication paths, Since it is possible to quickly and accurately determine whether communication is impossible for the entire device,
Recovery work for the terminal device can also be performed quickly and appropriately.

Further, even when the number of installed terminal devices is increased, accurate determination can be performed, so that the reliability of the communication network can be improved.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a failure determination system for a multi-line communication terminal device of the present invention.

FIG. 2 is a flowchart for explaining the operation of the failure determination system shown in FIG. 1 of the present invention.

[Explanation of symbols]

 11 Terminal Device A 12, 13 Communication Line 14, 15 Line Fault Detection Device 16 Alarm Device 17 Central Processing Unit 18 Line Information Storage Unit 19 Fault Statistics Information Storage Unit 20 Communication Fault Judgment Unit 21 Display Device

Claims (3)

[Claims] 1. A terminal device having a plurality of communication paths to which a plurality of lines are connected, and a line failure detection device for detecting a failure of each of the plurality of lines connected to the terminal device, An alarm transmission device that transmits fault information when a line fault is detected by the line fault detection device, and a fault statistical information storage unit that stores the line fault of each of the plurality of lines based on the fault information from the alarm transmission device. A line information storage unit that stores information about a plurality of lines connected to the terminal device; and when the fault information is received from the alarm transmission device, the line information storage unit and the fault statistical information storage unit are searched. And a communication failure determination unit that determines whether there is a communication failure as the terminal device based on the presence or absence of a failure in each line of the terminal device. Failure determination system for line communication terminal device. 2. A plurality of the terminal devices are provided, and the failure statistical information storage unit, the line information storage unit and the communication failure determination unit are included in a central processing unit. The fault of the multi-line communication terminal device according to claim 1, wherein a display device for displaying communication fault information from the communication fault determination unit of the processing device is provided in common to the plurality of terminal devices. Judgment system. 3. The communication failure determination unit of the central processing unit is configured to perform a determination operation when failure information is received from the alarm transmission apparatus or when the line failure is restored. The fault determination system for a multi-line communication terminal device according to claim 2.