JPS58206269A - External monitor system - Google Patents

Abstract

PURPOSE:To realize an external monitor system which is suited to the decentralizing process with a reduced increment of load to both hardware and software, by distributing timing signals to plural slave device modules from a host device module via a time division network and then checking the normal state by each slave device on the basis of the time-out checking result. CONSTITUTION:When a ringing signal is used as a timing signal, a main processor MPR usually transmits a ringing control signal to a ringing signal controller RGC. The phase discriminating signal of the ringing control signal is put into a specific time slot of time division networks NW00-NW07 respectively. Then the phase discriminating signal is applied to a call processor CPR from a signal transmitter SRD via the network NW. The processor CPR always monitors the phase discriminating signal and controls a subscriber circuit LC to transmit a ringing signal. Then the processor CPR gives information to a timing signal monitor device TM with detection of the phase discriminating signal. The device TM actuates a fault monitor device EMA to switch the slave modules in case no reception of detecting signals from the CPR occurs in prescribed times within a certain time.

Description

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD OF THE INVENTION The present invention relates to an external monitoring method for monitoring a digital switching system constructed of modules with distributed functions.

Conventional technology and problems In conventional digital exchanges, an external monitoring device makes a regular call and checks whether there is a failure by checking whether a dial tone is returned or whether the system recovers normally. It was something. For example, Fig. 1 shows a single block IBI for explaining the conventional external monitoring system, with NWOO to NWO7
is a time division 7x1 work, 5Rr) is a signal transmitting/receiving device, C
PR is a single-channel processor, MPR is a main processor, LC is a subscriber circuit, SCN is a scanning circuit, EMA is an abnormality monitoring device, MESE is a mask external monitoring device, S E S
1- is a sub-external monitoring device, and shows a digital switching system with a duplex configuration. Sub external monitoring device S
The ESE is accommodated in the time-sharing networks NWOO to NWO7 via the subscriber circuit 1-C, and periodically makes calls under the control of the mask external monitoring device MESE, and sends these calls to the main lower end processor. The call processor CPR under the control of the MPH detects this and controls the transmission of the dial tone. It is normal when the external monitoring device can detect the dial tone within a predetermined time, and it is abnormal when it cannot be detected within the predetermined time. When this abnormality continues for a predetermined number of times, the abnormality monitoring device EMA is activated. It will start up and perform thread switching control. Also, return 1 (1) from the external monitoring device side.
By performing this operation, the transmission of the dial tone is stopped F, so in this case as well, if the dial tone stops within a predetermined period of time, it is determined that the iE is normal. If the dial tone is one stop 1-sitζ within a predetermined time, it is an abnormality, and if this abnormality continues for a predetermined number of times, the abnormality monitoring device EMA is activated to control the thread replacement. It turns out.

If an abnormality occurs in each time division network NWOO to NW07, it will be determined that there is a failure in the main processor MPR that manages and controls each call processor CPR.
Each time switching control of the main processor MPH, which is duplicated, is performed.

As digital switching systems become increasingly distributed, it becomes insufficient to monitor the functions of each part.

OBJECTS OF THE INVENTION It is an object of the present invention to provide an external monitoring method that is compatible with a distributed processing architecture and that does not increase the burden on special hardware/systems. Examples will be described in detail below.

Embodiment of the invention Figure 2 is a block diagram of an embodiment of the invention.
The same reference numerals as in the figure indicate the same parts. The timing signal (a
For example, a linking phase identification signal and a phase ratio signal are created on the main processor L-1 processor MPR side, which is the main device module, and the time division network NWOO to NW is sent to the call processor CPR, which is a slave device module.
O? distributed via

Program configuration E The generation routine for the timing signal (al) is located in the call processing, and the slave device module side detects the timeout of the timing signal tar7, and the logical product of the detection results determines the normality of the main device module. It identifies the thread and controls thread switching.

□ A case where a ringing phase identification signal is used as the above-mentioned timing signal 1al will be explained. The main processor MPR always sends a ringing control signal to the ringing signal control device RGC, and this ringing control signal includes a phase identification signal and a wind signal, and the former organization-specific signal is sent to each time division network NWOO. ~N.W.O.
7, and adds the phase identification FD from the FD transmitting/receiving device SRD to the call processor C:PR via the time division network. The call processor CPR is a call processing program that constantly monitors the phase identification signal 7 and controls the ringing relay of the subscriber circuit LC to send out the ringing signal.

Note that conventionally, a phase identification signal was sent from the main processor to the call processor via the lotus.

Since the tissue-specific signal is sent at a fixed period, the call processor CPR notifies the timing signal monitoring device TM by detecting the phase identification signal, and the timing signal monitoring device TM indicates that the timing signal monitoring device M is within a certain period of time. When no detection signal from the processor CPR is received for a predetermined number of times, the abnormality monitoring device EMA is activated, the duplexed slave module is switched, and an external interrupt signal is applied to the gate circuit G.

By outputting the AND of the external interrupt signals of each slave module, the abnormality monitoring device of the main module is activated and switching control of the main processor MPR is performed.

Of course, it is possible to use a signal other than the above-mentioned ringing phase identification signal as the timing signal (al), and monitoring can be performed without adding a special external monitoring device or providing a special communication means between the father processors. It becomes something that can be done.

DETAILED DESCRIPTION OF THE INVENTION As described in detail, the present invention distributes a timing signal from a master module to slave modules via a time division network, and detects a timeout in each slave module using a timing signal monitoring device TM or the like. , gate circuit G, etc. to check the normality of the main device module, and the timing signal from the main device module issued under the program control of the exchange process is sent via the bus. Rather than distributing to slave modules via a time-sharing network, the L clause,
It is possible to check the normality of the system and monitor and control it without adding any special configuration. Furthermore, in the present invention, the timing (g
Since the system is monitored by distributing signals, it becomes possible to check the system's normality with certainty.

[Brief explanation of drawings]

Figure 1 is an explanatory block diagram of a conventional external monitoring system;
The figure is a block diagram of the embodiment of the present invention. PR
is the main processor, EMA is the abnormality monitoring device, RGC is the ringing signal control device, 31/3 is the subscriber, and fal is the timing signal. 81!1 Figure M 2 Figure NWIIU NWO
7S, K, R signal

Claims (1)

[Claims] In a digital exchange system in which timing signals generated by program control in mating processing are transmitted and received between functionally distributed modules and each module performs processing operations, the timing signals are transmitted via a time division network. , an external monitoring system characterized in that the device module is distributed to a plurality of slave device modules, and each slave device module checks whether or not the IF is normal by logically multiplying the timeout detection results.