JPH05199557A - Switchboard operation restarting system against call processing fault - Google Patents

Abstract

PURPOSE:To directly monitor and detect the call processing fault of a switchboard from outside and then to early recover a normal call processing action with no intervention of a maintenance engineer. CONSTITUTION:An external. monitoring device 7 produces the test calls to a subscriber circuit 5 in response to plural subscribers and in each fixed cycle and at the same time monitors whether a switch processing state is normally carried out or not to each call. If an abnormal call processing operation is detected, an emergency operating circuit 5 starts to change a system constitution pattern to recover a normal state and to perform the initialization of a memory device 2 and a control system device.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention detects an abnormality in a control system of a switch or a call processing control program directly or indirectly from the outside and detects a call processing operation in the switch as soon as possible. The present invention relates to a system for restarting the operation of the exchange when the call processing is abnormal.

[0002]

2. Description of the Related Art As a conventional switch abnormality monitoring system, as shown in Japanese Patent Publication No. Sho 51-36009, a failure that cannot be detected by the software of the switch itself is a periodical test. An abnormality of the exchange is detected by externally monitoring whether the call is normally processed. If an abnormality is detected in the exchange, or if call processing still does not return to normal after the restart of the exchange system is performed, the maintenance personnel manually restarts the system according to the judgment of the maintenance personnel, The fact is that the system is repeatedly restarted until it returns to the state.

[0003]

However, in the above-mentioned prior art, the restarting operation of the exchange system is performed as a result of the abnormality of the exchange being detected from the outside, but the control system itself of the exchange is abnormal. If there is a problem, it is often the case that the switch cannot be restored normally due to the control system configuration when the switch system is restarted, and as a result, the It was necessary to repeatedly restart the exchange system including the abnormal disconnection of the control system device due to the intervention of.

On the other hand, apart from the above, in recent years, the restarting operation of the exchange system due to the intervention of the maintenance person has failed, and as a result, a lot of time is required until the call processing operation in the exchange returns to the normal state. On the other hand, the actual situation is that there is a demand for rationalization of maintenance, for example, a system automatic restart without intervention by a maintenance person based on a remote maintenance request.

An object of the present invention is to detect an abnormality in a control system of a switch or a call processing control program directly or indirectly from the outside and to detect a normal call processing operation in the switch early and without maintenance personnel intervention. The present invention is to provide a method of restarting the operation of the switching equipment in the event of an abnormal call processing that can be restored.

[0006]

The above-mentioned object depends on whether or not a test call generated periodically is normally processed.
Every time a call processing abnormality in the exchange is monitored and detected based on a predetermined criterion, it is considered that a failure has occurred in the control system or the call processing control program, and the redundant control system and The system configuration pattern of the memory system is achieved by performing predetermined and autonomous updating, and then performing call processing abnormality monitoring by a test call in a state where the exchange system is restarted. In addition, the above-mentioned purpose depends on whether or not a test call that is periodically generated is processed normally.
Every time a call processing abnormality in the exchange is monitored and detected based on a predetermined criterion, it is considered that a failure has occurred in the control system or the call processing control program, and the redundant control system and The memory system configuration pattern is
Call processing abnormality monitoring by a test call after the switching system is restarted after the system configuration pattern control information from the remote monitoring and control device that remotely monitors the state of the control system is updated to the desired system configuration pattern Is achieved by performing. Further, the above-mentioned object is to monitor and detect a call processing abnormality in the exchange based on whether or not a test call generated periodically is normally processed, based on a predetermined criterion. It is considered that the control system or the call processing control program has failed, and after the system configuration patterns of the redundant control system and memory system are updated in a predetermined and autonomous manner, the exchange system is restarted. When the call processing abnormality is monitored by the test call in the activated state, even if the switching system is restarted based on the update of the system configuration patterns for the number of combinations of the system configuration patterns, the call processing abnormality still occurs. If it cannot be recovered, the restart operation of the exchange system is started with a part of the control system device disconnected based on the control from the remote monitoring control device that remotely monitors the state of the control system. It is achieved in Rukoto.
Furthermore, the above-mentioned object is that, when a remote control by the remote monitoring control device detects an abnormality of the control system in the exchange related to the call processing abnormality, the remote monitoring control device automatically performs the operation of releasing the abnormal state. Can be achieved.

[0007]

In general, the main causes of abnormalities in call processing are abnormalities in various programs and failures in the control system hardware of the exchange. The recovery methods for this are disconnection of the failed hardware device and , Or memory initialization is required, so the basic solution is
Whenever an abnormality in call processing is detected, the system configuration of the control system is forcibly changed and then the startup of the exchange system is restarted. However, in that case, the number of restarts shall be up to the combination of system configurations of the system, and for failures that do not recover even after that, the system restart by the initial program load by the maintenance person is necessary. When the switch system is restarted, the remote monitor control device may be combined with the operation by partially disconnecting the control system device of the switch.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to FIGS. First, the exchange system according to the present invention will be described. FIG. 1 shows a schematic configuration of an example of the exchange system together with the periphery thereof. In this case, the exchange system generally has a central control unit 1 for controlling the entire exchange system, a memory unit 2 for storing various exchange processing programs and various data, a communication channel unit 4, a subscriber circuit. Although it is configured to include (subscriber support) 5, an external monitoring device 7 and an emergency operation circuit 3 are further added. Among them, the external monitoring device 7 monitors whether or not the call processing of the exchange is normally executed, by judging whether or not the test call generated at a constant cycle is normally processed. The emergency operation circuit 3 is activated when an abnormality in the call processing is detected by monitoring. Emergency operation circuit 3
Is activated, the central control unit 1 and the memory unit 2 which are duplicated are switched and configured in accordance with a predetermined system configuration pattern, and the switching system is restarted and initial settings are performed. is there.

Here, the general operation of the exchange system configured as described above will be explained. When a call is made from the subscriber 6 (off-hook) to the exchange system via the subscriber circuit 5, that operation is performed. The transmission is detected by the central control unit 1 via the subscriber circuit 5. In the central control unit 1, the call detection program stored in the memory unit 2 is executed at regular intervals, so that the call from the subscriber 6 is detected. In the central control unit 1, the subscriber 6 is drawn into the communication path system apparatus 4 based on the destination subscriber telephone number from the subsequent subscriber 6 and the processing for setting the communication path and the transmission of the signal tone are stored in the memory device 2. However, such a call processing operation is such that if, for example, a part of the program related to the call processing becomes abnormal, the exchange processing operation is interrupted or stopped. is there. Therefore,
In such a case, if it is not possible to isolate the faulty part by the fault detection by the hardware or to initialize the memory device 2, some or all of the call processing operations cannot be executed. In this state, the maintenance person is notified of such an abnormal state for the first time after waiting for a report from the accommodating subscriber, and the recovery process is delayed.

Therefore, the external monitoring device 7 and the emergency operation circuit 3 are provided in order to avoid the above-mentioned abnormal situation. While the exchange system is operating normally, the external monitoring device 7 generates test calls corresponding to a plurality of subscribers to the subscriber circuit 5 at regular intervals, while the exchange processing state for each of those calls is maintained. It is monitored whether or not it is normally executed. Although abnormalities in call processing operation can be detected by this monitoring, if the ratio of abnormality detection to the number of test calls exceeds a predetermined criterion, it is judged that the call processing operation is abnormal. When the emergency operation circuit 3 is activated, the system configuration pattern for recovering from the failure state is changed, and the initial setting operation of the memory device 2 and the control system device is executed.

FIG. 2 shows a configuration of an example of an external monitoring device as a partial constituent requirement of the exchange system. In this case, a plurality of test call generation circuits 8-0 to 8-n
While a test call is generated from each of them at regular intervals, the test result judging circuit 9 monitors whether or not the call is processed normally. Test result judgment circuit 9
While the monitoring status in the above is constantly displayed on the maintenance monitoring device (not shown) as the error display signal 13, if the number of abnormal call processing exceeds the predetermined determination standard even in the monitoring. For example, when the processing result for each test call is continuously NG for a certain number of times, it is determined that the call processing in the exchange system is abnormal, and the emergency operation circuit drive circuit is activated to activate the emergency operation circuit 3. An emergency operation circuit drive signal 12 is sent to the emergency operation circuit 3 via 10. Emergency operation circuit 3 attached to the central controller 1
When is started, the system configuration pattern of the control system is changed,
External monitoring is performed at the time when the initial setting process is executed for the memory device 2 and the control system device (specifically, the central control device 1 after the system configuration pattern is changed), and the execution of various exchange program processes is resumed. When the external monitoring device activation signal 14 is sent from the emergency operation circuit 3 to the restarting circuit 11 so that the device 7 is restarted, abnormal monitoring of call processing by the external monitoring device 7 is restarted. In this way, when it is determined that the call processing is abnormal again while the abnormality monitoring is restarted, the system configuration pattern of the control system is changed, and the initial setting process for the memory device 2 and the control system device is performed. It suffices that the abnormality monitoring of the call processing by the external monitoring device 7 be restarted at the time point when the execution is performed and the execution of various exchange processing programs is restarted. The operation of the switching system is restarted continuously, autonomously, and automatically over the combination of the system configuration patterns of the control system, but the combination update of the system configuration patterns is controlled externally as desired. It is also possible to do. When the state of the control system is remotely monitored by the remote monitoring control device (not shown), the system configuration pattern may be updated and controlled as desired by the system configuration pattern control information from the remote monitoring control device. is there. However, it is also possible to interrupt the system configuration pattern control from the remote monitoring and control device, if necessary, in the system configuration pattern update control that is performed autonomously.

FIG. 3 also shows a switching operation restart method in the case where it is possible to issue a partial disconnection instruction of the switching control system apparatus from the remote monitoring control apparatus when restarting the switching system from the external monitoring apparatus. It is a thing. In this case, when the call processing function is not restored even after the execution of the combination of the predetermined system configuration patterns when the system is restarted from the external monitoring device 7 to the emergency operation circuit 3, the remote monitoring control device 16
Further, if one system of the duplicated central control unit 1 is set to the disconnected state via the console interface unit 15, the system can be restarted and restarted in the disconnected state of the partial control system. It will be.

FIG. 4 shows an example of the system restart / start sequence performed at that time. In this case, if the processing result of the test call from the external monitoring device to the exchange is continuous NG, the system of the exchange is restarted by the emergency operation circuit. After that, when there is a restart signal from the emergency operation circuit to the external monitoring device, the external monitoring device restarts the external monitoring operation by a test call to the exchange at regular intervals. As long as the restarted external monitoring operation determines that the call processing of the exchange is abnormal, the above operation is repeated for the predetermined number of combination patterns of the exchange control system, and the call processing is normally performed. Does not recover,
The external monitoring circuit gives an instruction to the remote monitoring control device to restart and start the system in a state in which a part of the exchange control system device is disconnected. In the remote monitoring control device, the control signal of the disconnection state of the exchange control system is sent to the console interface section 15 to restart the exchange system, and in the case of the duplex system, the above operation is performed for both systems one by one. ..

Lastly, the cancellation of the abnormal condition of the control system by the remote monitoring control device will be described. In FIG. 5, the remote monitoring control device monitors the condition of the switching device control system to monitor the abnormal condition of the switching device. If an abnormality is detected in step 2, the operation of canceling the abnormal state of the exchange control system is performed via the remote monitoring control device. That is,
The condition of the control system of the exchange is monitored periodically based on the console information, and although it is apparently abnormal in the hardware and software of the exchange, it cannot be clearly determined to be abnormal, for example, clock supply. If the clock self signal for selecting the source is in the ignition state in both systems, the call processing is stopped due to the clock asynchronization between the duplexers. Therefore, if this state is detected, remote monitoring control is performed. By sending a clock self-key signal from the device for selecting a clock supply source, it is possible to recover the above state without controlling the exchange and without maintenance personnel intervention.

[0015]

As described above, according to the first to fourth aspects, the abnormality of the control system of the exchange or the call processing control program is directly and indirectly monitored and detected from the outside, and the exchange can be operated at an early stage and without maintenance personnel intervention. The call processing operation can be normally restored.

[Brief description of drawings]

FIG. 1 is a diagram showing a schematic configuration of an example of an exchange system according to the present invention together with its periphery.

FIG. 2 is a diagram showing a configuration of an example of an external monitoring device as a partial configuration requirement thereof.

FIG. 3 is a diagram showing a switching operation restarting method in a case where it is possible to issue a partial disconnection instruction of a switching control system device from a remote monitoring control device when restarting the switching system from an external monitoring device.

FIG. 4 is a diagram showing an example of a switching system restart / start sequence at that time.

FIG. 5 is a diagram showing an example of an operation sequence for releasing an abnormal state of an exchange control system by a remote monitoring control device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Central control device, 2 ... Memory device, 3 ... Emergency operation circuit, 4 ... Communication path system device, 5 ... Subscriber circuit, 6 ... Subscriber,
7 ... External monitoring device, 8-0 to 8-n ... Test call generation circuit, 9 ...
Test result judgment circuit, 10 ... Emergency operation circuit drive circuit, 11
... Restart circuit, 12 ... Emergency operation circuit drive signal, 13 ... Error display signal, 14 ... External monitoring device activation signal, 15 ... Console interface section, 16 ... Remote monitoring control device

Claims (4)

[Claims] 1. Depending on whether or not a test call generated periodically is normally processed, a call processing abnormality in an exchange is monitored and detected each time based on a predetermined criterion. It is considered that the control system or the call processing control program has failed, and after the system configuration patterns of the redundant control system and memory system are updated predetermined and autonomously, the switch system is restarted. A method of restarting the switching equipment operation when a call processing error occurs so that call processing error monitoring can be performed by a test call in the raised state. 2. Depending on whether or not a test call that is periodically generated is normally processed, every time a call processing abnormality in the exchange is monitored and detected based on a predetermined criterion, It is considered that the control system or the call processing control program has failed, and the system configuration pattern of the redundant control system and the memory system is a remote monitoring control device for remotely monitoring the state of the control system. After the system configuration pattern control information from the system is updated to the desired system configuration pattern, the call processing abnormality monitoring by the test call is performed while the exchange system is restarted. Restart method. 3. Depending on whether or not a test call that is periodically generated is normally processed, a call processing abnormality in an exchange is monitored and detected each time based on a predetermined criterion. It is considered that the control system or the call processing control program has failed, and after the system configuration patterns of the redundant control system and memory system are updated predetermined and autonomously, the switch system is restarted. When the call processing abnormality is monitored by the test call in the raised state, even if the switch system is restarted based on the update of the system configuration patterns for the number of combinations of the system configuration patterns, the call processing abnormality is still recovered. If this cannot be done, the restart operation of the exchange system is started in a state where a part of the control system device is disconnected based on the control from the remote monitoring control device that remotely monitors the state of the control system. Yo A method of restarting the exchange operation when a call processing error occurs. 4. When a remote control by the remote monitoring control device detects an abnormality in the control system in the exchange related to the call processing abnormality, the control device automatically performs the operation of canceling the abnormal state. , Switching system restart method when call processing is abnormal.