JPH01126851A - Line monitor device - Google Patents

Abstract

PURPOSE:To offer the state of a data communication system in a form judged by an analyzer accurately and easily by updating a storage space automatically every detection of a trigger condition so as to allow the analyzer to discriminate the process of detecting the trigger condition in the minimum storage space. CONSTITUTION:When a trigger condition set to a trigger condition setting device 11 is detected, a signal informing the detection from a trigger condition detector 12 is sent to a synthesizer 13 and a display buffer 15, a divider 20 transfers the storage space of a storage device 14 to the succeeding storage space to be stored and a divider 21 selects an optional storage space and reads it on the display buffer 15. Moreover, a numerical character to inform the transfer of the storage space is sent from the trigger condition detector 12 to the display buffer 15 and how many trigger conditions are detected is informed to the analyzer during monitoring. Thus, the state of the data communication system is offered in a form to be discriminated easily and accurately by the analyzer.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention records mutual communication states in a form that is easy for an analyst to judge, in order to capture and analyze the state of a line monitor device, particularly a data communication system. The present invention relates to a line monitoring device for use in a network.

[Conventional technology]

Conventional line monitoring devices of this kind connect to a communication line and record the communication status in a single storage space endlessly in a storage device (semiconductor, magnetic disk device, magnetic tape device, etc.), and record the data upon detection of a trigger condition. had been stopped.

FIG. 2 shows a block diagram of a concrete example of such a conventional line monitor device.

A device 1, which is an electronic computer or a terminal device, is connected to a communication line 3 via a modem device 2, and is connected to another device (not shown).
``The line monitor device 4'' that monitors the communication status is connected to the received data line 5. between the device 1 and the modulation/demodulation device 2. The communication status is inputted via the transmission data line 6, interface signal line 7, and monitor line 8.

The transmitted/received data signal input from the monitor line 8 is converted from serial data to parallel data by a serial/parallel converter 9, and a change in state of the interface signal is detected by a change detector 10.

One output of the serial-to-parallel converter 9 and the change detector 10 is logically summed by the synthesizer 13, and at the same time, the trigger condition setter 1
The logical sum of the trigger condition and the trigger condition set to 1 is taken and sent to the trigger condition detector 12 which detects the trigger condition.

The data logically summed by the synthesizer 13 is synchronized in predetermined bit units (7 to 11 bits) and sent to the memory 14 for storage.

The accumulated data is sent to the display buffer 15 based on format information sent from the display controller 18. The contents of the display buffer are converted into dot characters by a character generator 16, and the dot characters are converted into a video signal by a video signal generator 17 and displayed on a display 19.

When the trigger condition set in the trigger condition setter 11 is detected, the trigger condition detector 12 sends a signal notifying that the trigger condition has been detected to the synthesizer 13, which stops the accumulation of data in the memory 14. , a character informing the analyzer of the detection is sent to the display buffer 15 and displayed on the display 19, and then the monitor is stopped.

[Problem that the invention seeks to solve]

With the conventional line monitoring device described above, if there is only one preset trigger condition and it is clearly known, it is possible to stop the monitor and capture the process up to the detection of the trigger condition. If there are multiple conditions,
A drawback is that a single line monitoring device cannot capture the process leading up to the detection of each trigger condition.

[Means for solving problems]

The device of the present invention is a line monitor device that connects to a data communication system to record and display the communication status, and compares the communication status with a preset trigger condition, and automatically updates the storage space each time they match. It is characterized by restarting recording of communication status.

〔Example〕

FIG. 1 shows a block diagram of a line monitoring device according to the present invention.

This line monitor device 4 has the same basic parts as the line monitor device 4' shown in FIG. ing.

When the trigger condition set in the trigger condition setter 11 is detected, a signal indicating that the trigger condition has been detected is sent from the trigger condition detector 12 to the synthesizer 13 and the display buffer 15, and the divider 20 sends a signal to the memory 14. The storage space is transferred to the next storage space for recording, and the divider 21 selects an arbitrary storage space and reads it into the display buffer 15.

Further, from the trigger condition detector 12 to the display buffer 15,
A number character will be sent to notify you that the storage space has been migrated.
During monitoring, the analyst can be informed of how many trigger conditions have been detected.

The size and number of divisions of each storage space of the storage device 14 can be arbitrarily set in consideration of storage space utilization efficiency, data communication speed, and communication text length.

〔Effect of the invention〕

As described above, according to the present invention, the storage space is automatically updated each time a trigger condition is detected, thereby securing the minimum storage space that allows the analyst to judge the process leading up to the detection of the trigger condition. With this configuration, even if monitoring is started again, new data is recorded between different storage devices, so the status of the data communication system can be provided accurately and in a form that is easy for the analyst to judge.

[Brief explanation of the drawing]

FIG. 1 shows an embodiment of the present invention, and FIG. 2 shows a conventional example. DESCRIPTION OF SYMBOLS 1... Device, 2... Modulation/demodulation device, 3... Communication line, 4.4'... Line monitor device, '5... Reception data line, 6... Transmission data line, 7. ...Interface signal line, 8...Monitor line, 9...Series-parallel converter, 1
0... Change detector, 11... Trigger condition setter, 1
2...Trigger condition detector, 13...Synthesizer, 14.
14'...Storage device, 15...Display buffer, 16.
...Display character converter, 17...Video signal generator, 18
...Display controller, one ...Display device, 20.21...
・Decomposer.

Claims (1)

[Claims] In a line monitor device that connects to a data communication system to record and display communication status, the communication status is checked against a preset trigger condition, and each time a match is made, the storage space is automatically updated and the recording is restarted. A line monitor device featuring: