JPH05336111A - Isdn fault disconnection device - Google Patents

Abstract

PURPOSE:To provide the ISDN fault disconnection device being able to easily make fault analysis by minimizing the effect of an error of its own terminal equipment onto other terminal equipment without stopping the ISDN service. CONSTITUTION:On the reception of an error code in the use of an ISDN protocol, a circuit interruption means interrupts a line and on the condition that other terminal equipment in the communication state with a host computer is not in existence, a re-rising means is used to apply reset to the ISDN protocol of its own terminal equipment to execute the re-rising of the ISDN protocol, an initial information setting means sets the same protocol information as before reset to the ISDN to reproduce the same state as before reset and the normal operation is continued.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to an ISDN fault isolation device.

[0002]

2. Description of the Related Art ISDN is used for data communication between a large number of terminals and a host computer by using ISDN.
An abnormal condition may occur on the DN protocol. In such a case, conventionally, execution of the ISDN protocol is interrupted and the state is notified to the user, and thereafter, the user is left to decide whether to continue the operation or stop the operation of the terminal.

[0003]

If communication continues while the ISDN is abnormal, the abnormality may spread to other terminals, and stopping the operation of the terminal may hinder the subsequent work, which is extremely problematic. It's inconvenient.

[0004]

According to the present invention, in a terminal connected to a host computer using ISDN, a line disconnecting means for disconnecting the line when an error code is received when the ISDN protocol is used, and the host. A restarting means for resetting the ISDN protocol of its own terminal and restarting the ISDN protocol under the condition that no other terminal is in communication with the computer, and this restarting means The same protocol information as before the reset is reset after ISD
The initial information setting means for setting the N protocol is provided in the terminal.

[0005]

When the error code is received when the ISDN protocol is used, the circuit is disconnected by the circuit disconnecting means,
Also, on condition that there is no other terminal in communication with the host computer, the ISDN protocol of its own terminal is reset by the restarting means to restart the ISDN protocol, and the initial information The same protocol information as that before the reset is set by the setting means.
By setting the SDN, it is possible to reproduce the same state as before the reset and continue the normal operation thereafter. Therefore, the service of ISDN is not stopped, and the time that the ISDN is adversely affected can be minimized, and accordingly, the error of its own terminal does not spread to other terminals. Therefore, the failure analysis can be facilitated.

[0006]

An embodiment of the present invention will be described with reference to the drawings. In FIG. 2, a host computer 1 and a plurality of terminals 2, 3, 4 are connected via an ISDN 5 (Integrated Service Digital Network). These terminals 2, 3,
4 has multiple applications 6 using ISDN 5
Are prepared, and these applications 6 have a log area 7 in which error information is written.

Next, FIG. 3 shows a block diagram of an electronic circuit of the terminals 2, 3 and 4. ROM8, CPU9 which controls operation | movement of the terminals 2, 3, 4 according to the program written in this ROM8, R in which variable data is written
AM10, keyboard 11, display 12,
An ISDN board 13 with a CPU for managing the ISDN protocol 13a (see FIG. 2) is connected.
The external storage device 14 is also connected to the CPU 9 as needed.

In such a configuration, referring to the flowchart shown in FIG. 1, the host computer 1 and the terminal 2
Describe the state in which and communicate. When the terminal 2 connects to the host computer 1 through the ISDN 5, the ISDN protocol 13a of the terminal 2 may behave abnormally. When this abnormality is detected, error information is written in the log area 7 of the application 6, for example,
Then, the line with the ISDN 5 is disconnected. This step is the line disconnection means. Then, by checking the status of the ISDN5 usage status, it is determined whether or not there are other terminals 3 and 4 (other applications) communicating with the host computer 1 using the same line. If you have terminals 3 and 4 that are using
Wait until the end of use, ISD with CPU of own terminal 2
The N board 13 is reset to restart the ISDN protocol. This step is the restarting means for restarting the ISDN protocol 13a of the terminal 2 of its own. Then, the same protocol information as before the reset is applied to the ISDN with CPU of the own terminal device 2.
By setting the initial information in the board 13, it is possible to reproduce the same state as before the reset and to shift to the normal operation thereafter. This step is the initial information setting means for setting the same protocol information as that before the reset in the ISDN protocol 13a. A program for executing such a flow is written in the ROM 8 shown in FIG.

Therefore, the service of the ISDN 5 is not stopped, and the time for which the ISDN 5 is adversely affected can be minimized. As a result, the error of the own terminal 2 is caused by the other terminals 3, 4 It is possible to minimize the spillover to the user and facilitate the failure analysis. When analyzing this failure, log area 7 of application 6
This is done by pursuing the error information written in.

[0010]

According to the present invention, in a terminal connected to a host computer using ISDN, a line disconnecting means for disconnecting the line when an error code is received when the ISDN protocol is used, and a communication state with the host computer. ISDN protocol is reset by resetting the ISDN protocol of its own terminal under the condition that there is no other terminal in
Since the terminal is provided with restarting means for restarting the DN protocol and initial information setting means for setting the same protocol information in ISDN after the resetting by the restarting means as before resetting. , ISDN
When an error code is received when using the protocol, the circuit is disconnected by the circuit disconnecting means, and, provided that there is no other terminal in communication with the host computer, the restarting means is used to operate the own terminal. The ISDN protocol is reset to restart the ISDN protocol, and the same protocol information as before the reset is set in the ISDN by the initial information setting means, thereby reproducing the same state as before the reset, and thereafter the normal operation. Therefore, the ISDN service is not stopped, and the time that the ISDN is adversely affected can be minimized. As a result, the error of one's terminal can be It has an effect that it can minimize the spread to the user and facilitate the failure analysis.

[Brief description of drawings]

FIG. 1 is a flowchart according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a communication relationship using ISDN.

FIG. 3 is a block diagram showing an electronic circuit inside the terminal.

[Explanation of symbols]

 1 Host computer 2-4 Terminal 13a ISDN pull protocol

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Claims (1)

[Claims] 1. In a terminal connected to a host computer using ISDN, line disconnecting means for disconnecting the line when an error code is received when the ISDN protocol is used, and another terminal in communication with the host computer. Under the condition that the terminal does not exist, the ISDN protocol of the own terminal is reset and the ISDN protocol is restarted, and the restarting means is the same as that before the resetting by the restarting means. ISDN failure isolation device, wherein initial information setting means for setting the protocol information of the above to the ISDN protocol is provided in the terminal.