JPH01202062A - Exchange system - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Purpose of the Invention (Industrial Application Field) The present invention operates by storing program data on a RAM, and when a serious failure occurs, the program is transferred from a predetermined recording medium to the RAM. It is equipped with two systems that can be restarted by restarting and executing recovery processing, and one system always executes switch control operations, and when a failure occurs, the system is switched and takes over the above switch control operations.2 Concerning heavy switching system.

(Prior Art) In recent years, switching systems have been increasingly computerized, and the processing functions handled by switching systems are becoming increasingly diverse. Such electronic switching systems are generally configured to operate according to program data stored on RAM. When a failure occurs, information on the failure is recorded on the RAM as a failure history and displayed.

In addition, two sets of systems equipped with such functions are used, and one system always performs switch control operations, and when a serious failure occurs in that system, the system switches to the other system and takes over the switch control operations. Therefore, so-called duplex switching systems that ensure operational reliability have been constructed.

However, in the above switching system, each prefecture switches the system in charge of switching control operations to the other system when a serious fault occurs, and then performs hardware-based R on the system where the fault occurred.
The fault recovery program of the OM is activated, the program is reinserted onto the RAM from a predetermined recording medium such as a hard disk, and fault recovery is performed in accordance with the reinserted program and data. For this reason, there is a problem in that the failure history recorded on the RAM when a failure occurs is lost during the initialization process at the time of failure recovery after the above-mentioned program is reintroduced.

(Problem to be Solved by the Invention) As described above, in the conventional electronic switching system, since the RAM is initialized by the restart process when a serious failure occurs,
There has been a problem that the failure history recorded in the RAM is lost, making it impossible to use the failure history for subsequent maintenance or the like.

The present invention has been made in consideration of these circumstances, and its purpose is to save the RAM even if a serious failure occurs.
It is an object of the present invention to provide a switching system in which the recorded failure history can be saved and used effectively for subsequent maintenance, etc.

[Structure of the Invention] (Means for Solving the Problems) The present invention operates by storing programs and data on a RAM, and when a serious failure occurs, the program is reinserted into the RAM from a predetermined recording medium to recover. In a dual-system switching system that includes two systems that execute processing, one system performs switch control operations, and when a serious failure occurs in that system, the other system takes over the switch control operations. An absolute area is set in the RAM of each prefecture where data will not be rewritten even when the program is reloaded in the event of a serious failure, and the R of each prefecture is
This system is characterized in that fault information for serious faults occurring in the operating system is recorded in absolute areas on the AM. The failure information written in each of these absolute areas is recorded and saved as a failure history in a designated recording medium and then initialized. Specifically, after the program is reloaded onto the RAM in each prefecture, the above The feature is that the absolute area is initialized.

(Operation) According to the present invention, absolute areas in which data is not rewritten even if the program is reloaded are set on each RAM in the two systems where program data is stored, and these absolute areas are Since failure information is recorded when a serious failure occurs, the failure information can be effectively saved. As a result, even after the restart process is completed, the causes of the failure are not lost and can be used for subsequent maintenance.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic configuration diagram of an exchange system according to an embodiment of the present invention, where ■ indicates an electronic exchange main body, 2a, 2b.

2n are a plurality of telephone terminals connected to the terminal control section 3 of the electronic exchange main body 1. In addition to the plurality of telephone terminals 2a, 2b, to 2n described above, outside lines and the like are connected to the electronic exchange main body 1.

Therefore, the exchange main body l is equipped with two processing systems, the θ system and the 1 system, which are switched and driven under the control of the common control unit 4, so that one is used as the active system and the other as the standby system. It has become. When a failure occurs in the exchange control operation being performed in the active system, the common control unit 4 switches the exchange control operation to the other standby system, and causes the exchange control operation to be taken over and executed. .

However, the control unit 5 in each prefecture (0 system, 1 system) mentioned above
A and 5b are respectively provided with memories 8a and 13b, and execute exchange control operations in accordance with program data stored in the RAM portions of the memories Ba and 8b, respectively. Note that 7a and 7b are recording media such as hard disks and proppy disks that supply predetermined program data to the memories 6a and ib, and store and save predetermined data.

Here, the memories 8a and [ib are each composed of a ROM part 11 that fixedly stores a failure recovery program, etc., and a RAM part 12 in which data can be rewritten.
Section 12 is further divided into absolute area 13. It is divided into a program section 14 and a data section 15. This program section 14
Operation control programs are loaded from the recording media 7a and 7b, respectively, and the data section 15 contains various data (
status information of the telephone terminal, etc.) are stored respectively. One control section 5a manages exchange control operations under instructions from the common control section 4.

5b is a memory 6a provided corresponding to the control units 5a, 5b, and a plurality of telephone terminals 2a described above according to the program data stored in the RAM unit 12 of Bb.
.

Executes exchange (line connection) control, etc. between 2b and 2n.

If a failure occurs in the switching system, one of the control units 5a, which is functioning as the active system at that time, will
The fault information (for example, the location of the fault, the cause of the fault, the time of occurrence of the fault, etc.) is recorded in the absolute area 13 of each memory 6a. In addition, especially when a serious fault occurs, the control unit 5a stores information on the occurrence of the serious fault in the memory 6a of each prefecture.
The data are recorded in the absolute area 13 of 6b. Then, according to the failure recovery program stored in the ROM section 11 of the active memory 6a, predetermined program data is read from the recording medium 7a using hardware, and the program section 14. and is re-entered into the data section 15. The RAM unit 12 is initialized by re-inputting the program and data, and failure recovery is performed.

The absolute area 13 mentioned above is set as a prefix area in which the recorded data is not rewritten even when the program data is reloaded from the recording medium 7a when this serious failure occurs. be. By recording the above-mentioned fault information in such absolute area 13, the above-mentioned fault information is recorded and saved even when the program data is re-loaded into the RAM section 12.

FIG. 2 shows the flow of recovery processing procedures when a serious failure occurs in this switching system.

This processing procedure is activated when the active system control unit 5a detects the occurrence of a serious failure (step a). When the occurrence of a serious fault is detected, the memory 6 stores information about the serious fault.
Writing to the absolute area 13 set in a is performed (
Step b). Thereafter, the backup system is notified of the occurrence of a serious fault (step C), and the system that controls the exchange control operation is switched under the control of the common control unit 4 (
Step d).

By switching the systems, the switch control operation that was being executed in the active system is taken over by the standby system.

Thereafter, in the system where the above fault has occurred, I
PL is activated, and the program data is reloaded from the storage medium 7a to the RAM section 12. and R.A.
When the completion of re-inputting the program/data into the M section 12 is detected, the absolute area 13 is transferred as the next processing procedure.
After performing processing such as storing the serious failure information written in the area 13 as a failure history in the recording medium 7a, etc., the area 13 is initialized and is now provided as a backup system.

By the way, when the standby system receives notification of the occurrence of a serious fault from the active system, it first receives and processes the information about the fault, step e).
Write the failure information to absolute area 13 of memory θb (
Step f). Thereafter, system switching is executed under the control of the common control unit 4 mentioned above, and the exchange control operation is taken over (step g).

After that, the memory 6b is read between switching control operations.
The previously recorded serious failure information is read from the absolute area 13 of (step h). Then, the information about the serious failure is displayed as a failure message on a predetermined maintenance terminal (step n).
), and then information on the occurrence of the serious failure is recorded and saved as a failure history (step 0).

If no information on a serious fault is recorded in the absolute area 13, the status is determined by the process shown in step i, and a fault notification request is issued to the partner system (step j). In other words, it requests the control unit 5a where the failure occurred to re-notify the information. When the control unit 5a receives this request (step k), it reads out the previously recorded and saved information regarding the occurrence of the failure from the absolute area 13 of the memory 6a, and notifies the partner system of this (step i).

The control unit 5b, which has taken over the switching control operation, receives this re-notification of the failure occurrence information (step m).
As described above, this information is displayed as a fault message on a predetermined maintenance terminal (step n), and then information on the occurrence of the serious fault is recorded and saved as a fault history (step 0).

According to this system configured in this way, the memory 6a, which is the memory area of the control units 5a and 5b,
An absolute area 13 is set in each RAM section 12 of fib, and fault information is recorded in each of these absolute areas 13. Therefore, when a serious fault occurs, the program data can be reloaded to the RAM section 12. The above failure information will not be lost.

Furthermore, the fault information is not only recorded in the system where the fault has occurred, but also in the absolute area 13 of the memory of the standby system, and the fault information is re-notified as appropriate. It becomes possible to improve serviceability by storing the information and effectively using it for subsequent maintenance, etc. In addition, failure information is also notified to the system that has taken over the switching control operation in this way, and this is recorded.
Effects such as being able to promptly deal with the occurrence of the failure can be achieved.

Further, the setting of the absolute area 13 in the RAM section 12 described above divides the addresses in the memory space, and
, 5b, by simply restricting the address space that can be accessed during switching control operations and during failure recovery, so that it is possible to save failure information under easy address management.

Note that the present invention is not limited to the embodiments described above. For example, the procedure for notifying the other system of fault information, the procedure for confirming the fault information, etc. may be set as appropriate according to the system specifications.In short, the present invention can be modified in various ways without departing from the gist thereof. It can be implemented.

[Effects of the Invention] As explained above, according to the present invention, even when a serious fault occurs and the program data is reinserted into the RAM to recover from the fault, the fault information recorded on the RAM is saved. As a result, maintenance work based on the failure information can be facilitated, and serviceability can be improved, which has great practical effects.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram of an exchange system according to an embodiment of the present invention, and FIG. 2 is a diagram showing the flow of recovery processing procedures when a serious failure occurs in the embodiment system. ■...Electronic exchange main body, 2a, 2b, ~2n...
telephone terminal, 3... terminal control section, 4... common control section,
5a, 5b...Control unit, 8a, 6b...Memory, 7a, 7b...Storage medium, 11...ROM unit,
12...RAM section, 13...Absolute area, 14...
-Program area, 15...data area. 20th

Claims (1)

[Scope of Claims] It operates by storing programs and data on a RAM, and when a serious failure occurs, the system includes two systems that reload the program from a predetermined recording medium onto the RAM to execute recovery processing,
In a dual switching system in which one system performs switching control operations, and when a serious failure occurs in that system, the other system takes over the above switching control operations, each prefecture has a program stored in its RAM. A switching system characterized in that absolute areas are set in which data will not be rewritten upon re-input, and failure information in the event of a serious failure is recorded in each of these absolute areas.