JPH05153643A - Electronic private branch exchange - Google Patents

Abstract

PURPOSE:To shorten the maintenance operation time of the exchange which switches and uses switching control systems by shortening the backup time for switching process history information covering the respective systems. CONSTITUTION:When the start command for maintenance control operation is inputted, the inter-system transfer of the switching process history information is not performed between control parts 101 and 111 and pieces of history information on the systems in memories 102 and 112 for control are written on the hard disks(HD) 104 and 114 of their systems; and further, the HD 104 is replaced with a stand by HD and history information is written from the a memory 102 for control. Then when the end command for the maintenance operation is inputted, an inter-system control part 131 reads the pieces of history information out of the HDs 104 and 114 of the respective systems to a memory 132 for control and compares them with each other, thereby writing one piece of history information after their difference is compensated on the HDs 104 and 114 of the respective systems. The inter-system transfer of the history information is not performed after the start command for the maintenance operation is inputted, and only a minimum amount of data is transferred between the systems after the end command is inputted, so the backup and update time for the history information can greatly be shortened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a private branch exchange which guarantees uninterrupted circuit switching control by switching a switching control system, and more particularly, to a method for intersystem transfer of switching process history information accompanying maintenance management operation. Regarding improvement.

[0002]

2. Description of the Related Art A conventional exchange processing control unit in a private branch exchange has a configuration as shown in FIG. In particular, the configuration of FIG. 3 exemplifies a private electronic exchange provided with two exchange processing control systems having a control unit, a control unit memory, and a backup data storage unit.

In FIG. 3, reference numeral 101 denotes a control unit (MCPU) of one (0 system) of the above two systems. Also,
102 is a memory (MM) for the 0-system control unit, and 1
Reference numeral 03 is a 0-system data storage device control unit (DDC).
Further, 104 is a hard disk (HD) attached to a 0-system hard disk drive device, and 105 is 0
It is a floppy disk (FD) mounted in a floppy disk drive device of the system.

On the other hand, 111 is the control unit (MCPU) of the other (one system) of the above two systems. Further, 112 is a memory (MM) for the 1-system control unit, and 113 is a 1-system data storage device control unit (DD).
C). Further, 114 is a hard disk (HD) mounted in the 1-system hard disk drive device, and 115 is a floppy disk (FD) mounted in the 1-system floppy disk drive device.

As described above, the 0-system and the 1-system have exactly the same configuration, and when the 0-system and the 1-system alternately operate to perform the duplex operation, when a failure occurs in one system. The other system operates so that the failure of the exchange does not prevent the operation of the exchange. In the system of FIG. 3, the currently operating system is shown as the ACT system, and the standby system is shown as the SBY system.

In such a duplex operation type exchange, a procedure for storing data in the control unit memories 102 and 112 of each system in a hard disk (hereinafter abbreviated as HD) and a spare HD of each system is illustrated. This will be described with reference to the flowchart shown in FIG.

Normally, the software programs and data required for circuit switching are HD (104, 1) of each system.
14). When the exchange is started,
The software program and data are read from the 0-system HD 104 designated as the CT system by the control unit 101 via the data storage device control unit 103 and stored in the control unit memory 102. The software programs and data stored in the control unit memory 102 are then transferred to the 1-system control unit memory 112 currently designated as the SBY system, and after a while after the start of the exchange,
The same software program and data are stored in both the ACT system control unit memory 102 and the SBY system control unit memory 112.

As described above, in the duplex operation system, in order to guarantee its operation, the same content data is stored in both the ACT system control unit memory 102 and the SBY system control unit memory 112. Need to be here,
Change the system data for some reason and change the HD of each system.
And consider the operation when saving to a spare HD.

In this case, the operator first changes the data in the 0-system and 1-system control unit memories 102 and 112 using the maintenance console of the exchange (step 201). Next, the data of the 0-system control unit memory 102 is stored in the HD 104 (step 202). Next, the ACT system is switched from the 0 system to the 1 system in order to store the data in the control unit memory 102 in the 1-system HD 114 (step 203). After system switching, 0-system HD104
The exchange process history information is transferred from the 1st system to the HD 114 (step 204). Regarding this processing, in the conventional exchange, when the system switching is performed, the old ACT system HD (current SBY)
The system is designed so that the exchange process history information is always transferred from the new HD to the new ACT HD.

After the transfer operation of the exchange process history information is completed, the data in the controller memory 112 is stored in the HD 114 (step 205). Next, in order to save the changed system data in the spare HD, first, the current SBY
The 0 system that is the system is OUS (Out of S
ervice) mode (step 206). next,
Pull out the 0-system HD104 from the exchange main unit
Insert D instead of HD of system 0 (Step 20)
7). When power is supplied to drive the attached spare HD and the standby state is entered, the 0 system automatically
The mode is restored to the (In Service) mode (step 208).

When the 0-system is restored to the INS mode, the exchange process history information is transferred from the 1-system HD 114 to the 0-system HD 104 (spare HDD) (step 209).
Regarding this processing, in the conventional exchange, the SBY system is OUS.
When the mode changes to the INS mode, the ACT system HD to S
The specification is such that the exchange process history information is always transferred to the BY type HD.

Next, the ACT system is switched from the 1 system to the 0 system (step 210), and here the exchange process history information is transferred from the 1 system HD 114 to the 0 system control unit memory 102 (step 211). ), And from the control unit memory 102, a 0-system HD 104 (spare HD)
Data is transferred to and stored in the HD (step 212), and a series of operations is completed.

As described above, in the conventional exchange of this type which adopts the system switching operation system, every time system switching or switching from the OUS mode to the INS mode in the SBY system occurs during the maintenance management operation. The setting is such that the exchange process history information is always transferred between systems. Therefore, conventionally, in the series of maintenance management work as shown in FIG. 4, the transfer process history information is transferred three times (steps 204, 209, 211).
At that time, it takes about 20 minutes to transfer the history information once, so that the work must be interrupted for an hour as a whole.

The cause of the long transfer time is that there is a lot of history data itself, and this kind of data transfer is mainly carried out in such a manner that the exchange process is performed and the interval is cut off. ..

In actual operation, the user usually backs up the latest data to the above HD once every several months, and as described above, nothing is done within the working period of one hour. It was extremely inefficient in operation that situations such as not being able to occur occur at the above frequency.

[0016]

As described above, in the above-mentioned conventional private branch exchange, when the system is switched or SB is switched.
When the Y system is switched from the OUS mode to the INS mode, it is set to transfer the exchange process history information between the systems without fail, and the time required for one intersystem transfer is very long. In the work, it takes a very long time to back up the latest data from the memory for the control unit to the HD, and during that time, it is necessary to stand by without doing anything, which greatly hinders efficient operation. There was a problem of coming.

The present invention eliminates this problem, and reduces the number of times of transfer processing history information between systems and the amount of transfer data during maintenance work as much as possible, thereby backing up the latest data from the controller memory to the HD. It is an object of the present invention to provide a private electronic exchange that can be efficiently operated by shortening the time and eliminating unnecessary waiting time as much as possible.

[0018]

The present invention comprises at least two systems having a control unit, a memory for the control unit, and a data storage device for backing up the control units, and switching each system as necessary, and In a private electronic exchange that transfers data in the data storage unit between systems and performs circuit switching processing while having common switching processing history information at each system switching, a control unit for each system after starting maintenance management operation System backup occurs from the backup memory to the data storage device, and the data storage device of either system is replaced with a spare data storage device, and system switching occurs until the backup to this spare data storage device is completed. Even if the inter-system transfer prohibition means that prohibits inter-system transfer of exchange process history information and the backup of the spare data storage device are completed, And history information updating means for writing the same exchange processing history information into the data storage device of each system.

[0019]

According to the present invention, after a series of maintenance management operations are started, even if a system switch or a mode switch in the standby system occurs during the backup process of the replacement process history information from the control unit memory to the HD, The inter-system transfer processing of the exchange processing history information is prohibited, and control is performed so as to proceed to the next step.

After the backup process is completed, the inter-system management control unit provided between the above-mentioned systems reads the exchange process history information stored in the data storage device of each system into the memory for the control unit. Then, the exchange processing history information having the same content is created and controlled so as to be written in the data storage device of each system.

According to the control of the present invention, the effect of shortening the time for the entire operation due to the reduction in the number of time-consuming inter-system transfer of the exchange process history information is great, and the exchange is performed every time the system switching occurs. The maintenance management work time can be greatly shortened compared to the conventional system in which the processing history information is transferred between systems.

[0022]

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. FIG. 1 is a block diagram showing a configuration of an exchange processing control unit of a private branch exchange according to an embodiment of the present invention, and the same reference numerals are given to those having the same functions as those of each unit of the conventional exchange shown in FIG. Attached. The configuration of the two systems provided in the exchange processing control unit of this exchange is the same as the conventional one.

That is, 101 is a control unit (MCPU) of one (0 system) of the above two systems. Reference numeral 102 is the 0-system control unit memory (MM), and 103 is the 0-system data storage device control unit (DDC). Further, 104 is a hard disk (HD) mounted in a 0-system hard disk drive device, and 105 is a floppy disk (FD) also mounted in a 0-system floppy disk drive device.

On the other hand, 111 is the control unit (MCPU) of the other (1 system) of the above two systems. 11
2 is a memory (MM) for the control unit of this 1 system,
Is a 1-system data storage device control unit (DDC). Reference numeral 114 denotes a hard disk (HD) mounted in the 1-system hard disk drive device, and 115
Is a floppy disk (FD) mounted in a 1-system floppy disk drive device.

In addition, the exchange of the present invention is provided with an intersystem management control unit (MCPU ') 131 between the 0-system control unit 101 and the 1-system control unit 111, and further, the intersystem management control unit. Memory for control unit (MM ') 132 attached to 131
Is provided. Here, the inter-system management control unit 131
According to the procedure to be described later, 0-system and 1-system HD (104, 1)
14) and after the backup of the replacement process history information to the spare HD is completed, the replacement process history information stored in the HDs (104, 114) of both systems is compared, and the replacement process history information is matched so that they match each other. The processing history information is updated, and the control unit memory 132 stores the exchange processing history information related to the processing.

In the exchange process control unit of the exchange of the present invention, the data (exchange process history information corresponding to the operation of each system up to that time) stored in the control unit memories 102 and 112 of each system will be described below. HD of each of these systems (104, 11
4) and an example of the maintenance management work procedure including the process of backing up to the spare HD will be described in detail with reference to the flowchart shown in FIG.

Usually, the software programs and data required for circuit switching are HD (104, 1) of each system.
14). When the exchange is started,
The software program and data are read from the 0-system HD 104 designated as the CT system by the control unit 101 via the data storage device control unit 103 and stored in the control unit memory 102. Immediately thereafter, the software programs and data stored in the control unit memory 102 are transferred to the SBY system control unit memory 112, and after a while after the start of the exchange, the ACT system control unit memory 102 and the SBY system control unit The same software programs and data will be stored in both memories 112.

As described above, in the exchange adopting the duplex switching operation system, the memory for the ACT system control unit and the SBY.
It is necessary that data with the same content is always stored in both the system control unit memories. Here, the system data is changed for some reason, and the HD (104, 11) of each system is changed.
4) and when it is necessary to save in the spare HD, the operator first changes the data of the 0-system and 1-system control unit memories 102 and 112 using the maintenance console of the exchange. (Step 301).

Next, the operator inputs a command from the maintenance console or the like to indicate that maintenance management will be started (step 302). In the control unit 101 of the current ACT system, for example, the 0 system, which has received the maintenance management operation start command, the "exchange" is performed even when the system is switched or the SBY system is switched from the OUS mode to the INS mode. Control is performed so as not to perform “inter-system transfer processing of processing history information”.

Under the control of such control conditions, backup work of replacement process history information related to maintenance management operations is started in this switch. Regarding this work, first, the control unit 101 of the 0 system, which is the current ACT system, reads out the changed data in the control unit memory 102,
This is transferred to the HD 104 through the data storage device control unit 103.
(Step 303). Then the exchange is 1
The ACT system is switched from the 0 system to the 1 system in order to back up the changed data similarly to the system (step 304). The 1-system control unit 111 newly designated as the ACT system reads the changed data from the control-unit memory 112 and stores it in the HD 114 through the data storage device control unit 113 (step 305).

After that, the exchange executes a process of storing the changed system data in the spare HD. Regarding this processing, first, the 0-system currently designated as the SBY system is set to the OUS mode by a command (step 3).
06). Next, the 0-system HD 104 is extracted from the exchange main body, and a spare HD is mounted instead of the 0-system HD (step 307). When power is supplied to drive the mounted spare HD and the drive standby state is entered, the 0 system is automatically restored to the INS mode (step 308).

Next, in the exchange, the replacement H
A process of saving the changed system data is performed on D. To perform this processing, first, the ACT system is switched from the 1 system to the 0 system (step 309). A new
The 0-system control unit 101 designated as the CT system reads the already-changed data from the control-unit memory 102, and transmits it to the HD 104 through the data storage device control unit 103.
(Here, it is replaced with a spare HD) (step 310).

Since the backup process itself of the exchange process history information relating to the maintenance management operation completes the process of S310 at the end, the operator thereafter performs an operation for restoring the normal exchange process mode. .. As this operation, the operator inputs a command instructing the end of the maintenance management operation from the maintenance console (step 311).

The control unit 101 of the 0 system currently designated as the ACT system recognizes the input of the command and immediately activates the intersystem management control unit 131. As a result, the inter-system management control unit 131 reads out the exchange process history information from the HDs 104 and 114 of each system while communicating with the control units 101 and 111 of both systems, and the control unit memory 13 is read.
2 and then compare these (step 3
12). Here, if the contents of the exchange process history information fetched from each system are different, the inter-system management control unit 131 newly creates one piece of information that supplements these differences, and uses this as the latest exchange process history information. Is stored in the memory 132 for the control unit.

Thereafter, the inter-system management control unit 131 transfers the latest exchange processing history information stored in the control unit memory 132 to the control units 101 and 111 of the respective systems.
In the control units 101 and 111, the latest exchange processing history information for each system is written in the HDs 104 and 114 via the data storage device control units 103 and 113 (step 31).
3) A series of maintenance management operations is completed.

As described above, in the present invention, when the maintenance management operation start command is input (step 302), according to the control condition set by the command, thereafter, the system switching in steps 304 and 309 or step 308 is performed. From OUS mode in SBY system of INS
Even when switching to the mode, it operates without transferring the exchange process history information between systems. After that, after a command instructing the end of the backup work is input, the same and latest replacement process history information is collectively written to the HDs of the respective systems.

As described in the section of the prior art, it takes a lot of time to transfer the exchange process history information between systems, but according to the present invention, the exchange process history information is transferred only because the system transfer is not performed. The backup of information can proceed smoothly.

After that, after the work end command is input, the update processing of the exchange processing history information is performed. In this processing, the exchange processing history information is taken in from each system and the difference information is transferred again to each system. However, the processing time is much shorter than the full transfer processing of the exchange processing history information for each system switching between systems.

Therefore, according to the present invention, as compared with the conventional system in which the exchange process history information is transferred between the systems each time the system switching or the operation mode switching in the SBY system occurs, the backup process is completed. The time required for maintenance can be greatly reduced, which in turn contributes to shortening the time required for the entire maintenance work. This is particularly useful in operation for users who have a system that backs up the latest system data to the HD every few months.

[0040]

As described above, according to the private branch exchange of the present invention, after the start of a series of maintenance management operations, the inter-system transfer process of the exchange process history information is prohibited even when the system is switched, and each system is controlled. After the backup process of the replacement process history information by the above is completed, the replacement process history information of each system is compared, and the replacement process history information of the same contents is written in batch to the data storage device of each system. The effect of shortening the maintenance management work time by eliminating the inter-system transfer of such exchange processing history information is very large, and especially in a system in which system data needs to be changed frequently.
Efficient operation can be achieved while minimizing the waiting time associated with the backup processing of the system data.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an exchange processing control unit of a private branch exchange according to the present invention.

FIG. 2 is a flowchart showing a system data backup processing operation in the exchange processing control unit of the private branch exchange according to the present invention.

FIG. 3 is a block diagram showing a configuration of a replacement processing control unit of a conventional private branch exchange.

FIG. 4 is a flowchart showing a system data backup process operation in a conventional exchange process control unit of a private branch exchange.

[Explanation of symbols]

101, 111 Control unit of each exchange processing control system (MCP
U) 102, 112 Control unit memory (MM) 103, 113 Data storage device control unit (DDC) 104, 114 Hard disk (HD) 105, 115 Floppy disk (FD) 131 Inter-system management control unit (MCPU ') 132 system Memory (MM ') for management control unit

Claims (3)

[Claims] 1. A control unit, a memory for the control unit, and at least two systems having a data storage device for backing up the system, each system being switched as needed, and the data storage being performed every time the system is switched. Back-up from the control unit memory to the data storage device for each system after the start of maintenance management operation in a private electronic switch that transfers data in the system between systems and performs circuit switching processing while having common switching process history information And the data storage device of any system is replaced with a spare data storage device and the backup to this spare data storage device is completed, even if system switching occurs, the system of the replacement process history information Inter-system transfer prohibition means to prohibit inter-system transfer, and after the backup of the backup data storage device is completed,
Compare the exchange process history information in the data storage device of each system,
A private branch electronic exchange comprising: history information updating means for writing the same exchange process history information into the data storage device of each system. 2. The history information updating means comprises an intersystem management control section connected between the control sections of the respective systems and a storage section for the control section, and the intersystem management control section stores the spare data storage. After the backup to the device is completed, the exchange process history information stored in the data storage device of each system is read into the storage means and compared, and the information corresponding to the difference is transferred to the data storage device of each system and stored. 2. The private branch exchange according to claim 1, wherein the private branch exchange is controlled so as to be forced. 3. The history information update is started by using a dedicated command for instructing the start of the maintenance management operation to start the control by the inter-system transfer prohibiting means and for instructing the end of the maintenance management operation. 3. A private branch exchange according to claim 1, wherein the control by means is started.