JPS61169059A - Line abnormality supervisory system - Google Patents

Abstract

PURPOSE:To avoid the disturbance of a normal call processing by starting an abnormality detection circuit equipped with each subscriber circuit when a station abnormality is detected by a station abnormality supervisory routine and extracting an abnormality call line so as to close it individually. CONSTITUTION:Call information 3 from a subscriber line 1 detected by a subscriber circuit 2 is given to the abnormality detection circuit 4. On the other hand, a station abnormality supervisory routine gives a counter start signal 8 to start the circuit 4 through a common controller 11 when the efficiency of a CPU12 and the quantity of incomplete end call exceed the threshold value inputted in advance. The circuit 4 starts operation in response to the signal 8. When it is recognized that the number of times of callings within a prescribed time is remarkably larger than the nature of a general subscriber, a call number counter 5 transmits a faulty alarm to a CPU12 via the device 11 and allows a closing control circuit 7 to close the circuit 2. Since a proper subscriber line is closed with low cost at a proper time, normal call processing is not disturbed.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a line abnormality monitoring method, and in particular to a line abnormality monitoring system of a telephone exchange that monitors and takes measures for abnormalities in subscriber lines that repeatedly make and abandon abnormal calls. Regarding monitoring methods.

[Conventional technology]

Conventionally, in this type of telephone exchange, when the central processing unit detects an abnormal state of its processing efficiency or an abnormal state of incomplete calls, it sends lower subscriptions according to predetermined subscriber levels according to importance. However, it was not possible to monitor abnormalities in specific subscriber lines, which were the true cause of abnormal calls, and block individual subscriber lines in abnormal conditions. .

For this reason, there is a problem that abnormal subscriber lines may be blocked due to line abnormality in some subscriber lines.Furthermore, since the abnormal line is essentially not blocked, even abnormal line abnormality in some subscriber lines may block normal subscriber lines. Normal subscriber lines will be blocked and put into ruin. Therefore, a method has been adopted in which each subscriber line is provided with an abnormal state detection circuit.

[Problem that the invention seeks to solve]

In the conventional line abnormality monitoring system described above, taking subscriber habits into consideration, the abnormal state detection circuit detects abnormal states overly sensitively and prevents the subscriber's line that is not abnormal from being inadvertently blocked and normal call processing to be prevented. Since it is necessary to take sufficient measures to prevent this, the abnormal state detection circuit has the disadvantage that it becomes expensive.

[Means for solving problems]

The line abnormality monitoring system of the present invention includes, in a telephone exchange accommodating a plurality of subscriber lines, an abnormality detecting means connected to the subscriber line to detect an abnormal call originating from the subscriber line, and a blockage of the subscriber line. and a blockage control means for releasing the blockage, and a station abnormality monitoring means for monitoring an abnormality in the entire station, and only when a station abnormality occurs, the station abnormality monitoring means activates the abnormality detection means to detect an abnormality in the subscriber line. Monitoring is performed, and when an abnormal call is detected, each subscriber's line is blocked.

The abnormality detection means includes a call counter that adds up the number of calls made from the subscriber's line, and a periodic reset circuit that resets the call counter at regular intervals. This is the station abnormality monitoring routine within the call processing program that performs the processing.

〔Example〕

Next, one embodiment of the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the line abnormality monitoring system of the present invention.

In the figure, subscriber line l detected by subscriber circuit 2
The call information 3 from the above is given to the abnormality detection circuit 4. On the other hand, the station abnormality monitoring routine, which is positioned as a part of the call processing program, is performed when the efficiency of the central processing unit 12, the number of incomplete calls, etc. exceed thresholds determined and inputted in advance based on past performance during normal times. , the abnormality detection circuit 4t is connected to the common control device 111 and gives a ninth counter activation signal 8 that activates the abnormality detection circuit 4t. The counter consists of a periodic reset circuit 6 which starts operation in response to the counter activation signal 8. When it is recognized that the number of calls made within a certain period of time is significantly larger than the habits of general subscribers, the number of calls counter 5 transmits a failure alarm 9 to the central processing unit 12 via the common control device 1lt-. The block control circuit 7 blocks the subscriber circuit 2.

After the subscriber circuit 2 is blocked due to a fault, the fault is repaired, a line test is performed, and for subscriber lines that are determined to be normal, the central controller 11 immediately blocks the block release signal lO. The signal is applied to the control circuit 7 to release the blockage.

〔Effect of the invention〕

As explained above, when a station abnormality is detected by the station abnormality monitoring router, the present invention activates the abnormality detection circuit installed in each subscriber circuit, extracts the abnormal calling line, and blocks it individually. Since a subscriber's line can be blocked at an appropriate time and at a low cost, there is an effect that normal call processing is not hindered.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the line abnormality monitoring system of the present invention. l...Subscriber line, 2...Subscriber circuit, 3...Calling information, 4...Abnormality detection circuit, 5...・Number of calls counter, 6...
Periodic reset circuit, 7... Blockage control circuit, 8.
... Counter start signal, 9 ... Failure alarm, 10 ... Block release signal, 11 ... Common control device, 12 ... Central processing Device.

Claims (2)

[Claims] (1) In a telephone exchange accommodating a plurality of subscriber lines, an abnormality detection means is connected to a subscriber circuit and detects an abnormal call origination of the subscriber line, and a blockage unit that blocks and unblocks the subscriber line. control means, and station abnormality monitoring means for monitoring abnormalities in the entire station, and only when a station abnormality occurs, the station abnormality monitoring means activates the abnormality detection means to monitor abnormalities in the subscriber line, and makes an abnormal call. A line abnormality monitoring system characterized by blocking each subscriber's line when detected. (2) In the line abnormality monitoring system set forth in claim (1), the abnormality detection means includes a call number counter that adds up the number of calls made from the subscriber's line, and resets the call number counter at regular intervals. It consists of a periodic reset circuit that
A line abnormality monitoring system characterized in that the station abnormality monitoring means is a station abnormality monitoring routine within a call processing program that performs call processing for the entire telephone converter.