JPH0426586B2 - - Google Patents

Description

[Detailed Description of the Invention] [Summary] An external monitoring device checks the operation of call processing processors provided for multiple networks, and a single simultaneous restart is performed even in the event of an abnormality in the main processor. This is a monitoring method using an external monitoring device to ensure a reliable restart.

[Industrial Field of Application] The present invention relates to a monitoring method using an external monitoring device as an operation check for an exchange.

[Conventional technology]

An example of a conventional switching system including a call processing processor is shown in FIG. In Figure 3, the network NW is, for example, 11 to 18 (NW1 to NW
There are eight call processing processors CPR 8), and call processing processors CPR 21 to 28 (CPR1 to CPR8) are provided correspondingly. Multiple call processing processors 21 to 28
A main processor 40 is provided to monitor the operations of (CPR1 to CPR8). External monitoring device 3
1 to 38 (ESE1 to ESE8) are provided corresponding to call processing processors and operate as equivalent to a "trunk". That is, the external monitoring device ESE generates a pseudo call to the corresponding network NW and checks the normality of the call processing operation executed by the network NW. Therefore, when generating a pseudo call, it is equivalent to an incoming trunk, and when receiving a response, it is equivalent to an outgoing trunk, and functions as both trunks. When the external monitoring device ESE detects an abnormality in the operation of the call processing processor, it automatically monitors the call processing processor.
Sends an emergency control notification (EMA notification) to CPR. Upon receiving this notification, the call processing processor CPR starts a fault recovery program and attempts to recover from the fault.

[Problem that the invention seeks to solve]

The main processor 40 as shown in FIG.
(MPR) is provided for information transfer between multiple call processing processors CPR, each call processing processor has no abnormality, and the main processor 40
If an abnormality occurs in (MPR), use an external monitoring device.
The abnormality could not be detected by ESE simply performing normal monitoring operations. This is because the external monitoring device ESE monitors the time from when a predetermined signal is sent to when a response is received, but the initial setting of the monitoring time varies for each external monitoring device ESE. Therefore, each external monitoring device ESE detects abnormal states separately, and each call processing processor is restarted to return to a normal state. At this time, the abnormal state and the detected time may not match in all call processing processors.
That is, even if there is no fault in the individual call processing processors, if the main processor is not fully operational due to a fault, the emergency control notification is only sent to each call processing processor. Therefore, no emergency control notification is applied to the main processor, and information transfer operations between the call processing processors via the main processor cannot be restarted. I can't. That is, even in the case of a minor failure that would allow a restart, the system cannot be restarted automatically.

An object of the present invention is to improve the above-mentioned drawbacks and to control the operation of an external monitoring device so that when a plurality of call processing processors simultaneously detect an abnormality in the main processor, the main processor is restarted as a fault has occurred. An object of the present invention is to provide a monitoring method for an external monitoring device that automatically performs the following.

[Means for solving problems]

FIG. 1 is a diagram showing the basic configuration of the present invention. In Figure 1, 11 to 18 are network (NW)
1 to NW8) and 21 to 28 are call processing processors (CPR1 to CPR8) provided corresponding to networks 11 to 18, and 31 to 38 are external monitoring devices (ESE1 to ESE8) which are also provided for network 1.
40 is a main processor, 50 is a system console for synchronizing the operation of an external monitoring device, and 60 is an AND circuit that simultaneously restarts the main processors. The time matching means is shown. Note that the number of network/call processing processors shown is 1.
Just an example.

A main processor 40 that centrally monitors call processing processors 21 to 38 corresponding to a plurality of networks 11 to 18, and call processing processors 21 to 2.
External monitoring devices 31 to 38 that perform the operation check of 8.
The present invention has the following configuration in a monitoring system using an external monitoring device for a switching system equipped with the following. That is, synchronization means 50 for synchronizing the operations of the external monitoring devices 31 to 38, and external monitoring devices 31 to 3.
AND circuit 60 inputting the detection signal from 8
The main processor 40 is restarted by the output of the AND circuit 60.

[Effect]

In FIG. 1, the operations of external monitoring devices 31 to 38 generate periodic pseudo calls, and
The basic timing lock required for monitoring, such as the time for generating a pseudo call, is controlled by the synchronization means 50 to perform a synchronization operation. That is, the synchronization means 50
For example, a "clock reset" signal from the system console is simultaneously applied to each of the external monitoring devices 31 to 38 as shown by broken lines. At this time, if the operation of the main processor 40 becomes abnormal, information transfer processing between the call processing processors becomes impossible, and the switching processing operations of the call processing processors 21 to 28 become impossible almost all at once. Therefore, a signal in which the external monitoring devices 31 to 38 detect an abnormality in the call processing processors 21 to 28 after monitoring for a predetermined time from a predetermined time such as the application of the clock reset signal, and restarts the call processing processors 21 to 28 is indicated by a broken line. Like and circuit 60
It is only necessary to perform a logical product operation and apply the resulting signal to the main processor 40.

〔Example〕

FIG. 2 specifically shows a partial configuration of the external monitoring device shown in FIG. 1 as an embodiment of the present invention. In FIG. 2, 70 indicates a clock pulse counter. A clock common to each network is applied to the counter 70, and a reset signal R is supplied from the console so as to initialize the counters simultaneously. This is done by simultaneously supplying a reset signal to the counters 70 of all external monitoring devices at the time of system startup.

As mentioned above, if there is an abnormal condition, the counter 70 does not receive a reset signal accompanying the response, so an overflow output is obtained, and that signal can be sent as a restart signal to the call processing processor and the main processor.

〔Effect of the invention〕

In this way, according to the present invention, a restart command to the main processor is issued at a predetermined time after an abnormality is detected, so that the system does not go down for a long time due to a minor fault. In addition, since automatic restart can be performed, there is no need to obtain additional information as in the past.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the basic configuration of the present invention, FIG. 2 is a diagram showing a partial configuration of the external monitoring device shown in FIG. 1 as an embodiment of the present invention, and FIG. 3 is a diagram for explaining a conventional monitoring system. It is a diagram. 11-18...Network NW, 21-28...
Call processing processor CPR, 31-38...External monitoring device ESE, 40...Main processor MPR, 50
...Synchronization means, 60...AND circuit.

Claims (1)

[Scope of Claims] 1. A main processor 40 that centrally monitors call processing processors 21 to 28 corresponding to a plurality of networks 11 to 18;
External monitoring devices 31 to 3 that perform operation checks of 28
8, a synchronization means 50 for synchronizing the operations of the external monitoring devices 31 to 38, and inputting abnormality detection signals from the external monitoring devices 31 to 38. 1. A monitoring system using an external monitoring device of an exchange, comprising: an AND circuit 60, and restarting the main processor 40 using the output of the AND circuit 60.