JPH03154534A - Digital multiplexer - Google Patents

Abstract

PURPOSE:To always monitor the quality of a digital line remotely by setting a limit on the line quality of the digital line in advance, counting error pulses outputted from an error detection and raising an alarm output when it exceeds an error limit. CONSTITUTION:An error pulse is generated every time an error detection section 10 detects a line error and an error limit setting means 20 sets an error limit raising an alarm display. Then a count means 30 counts number of error pulses apd when number of the error pulses exceeds an error limit set by the error limit setting means 20, alarm display is implemented to a display means 40 in a digital multiplexer 1. Simultaneously, the alarm output outputted from the count means 30 is displayed on a remote display device via an interface means 50. Thus, the quality of the digital line is always monitored remotely at all times.

Description

[Detailed Description of the Invention] [1 Already Required] Line quality that is capable of constantly monitoring the quality of the digital line and remotely displaying the line quality regarding digital multiplexing devices that are interconnected via digital lines and perform digital communication. The purpose is to provide a digital multiplexing device with a monitoring function, and the digital multiplexing device has an error detection section that outputs an error detection pulse every time a line error is detected. an error limit setting means for setting a line quality limit; a counting means for counting error detection pulses output from the error detection section and generating an alarm output when the line quality limit set by the error limit setting means is exceeded; W generated by counting means? I
The apparatus includes a display means for displaying the output, and an interface means for outputting the alarm output generated by the counting means.

[Industrial application field]

The present invention relates to digital multiplexing devices that are interconnected via digital lines and perform digital communication.

As digital communications are being widely adopted, monitoring line quality has become essential for network management.

There is a need for a digital multiplexing device that has the ability to monitor the line quality of digital lines not only during line abnormalities, but also during normal times.

[Conventional technology]

FIG. 3 is a block diagram illustrating a conventional example.

The conventional example shown in FIG. 3 is a digital multiplexer IA having an error detection section 10 that generates an error pulse every time a line error occurs, and 11 is an error pulse output terminal (hereinafter referred to as MON terminal). ).

The line quality of the digital line connected to the digital multiplexer IA can be monitored by connecting an oscilloscope 71 to the MON terminal 11 and observing error conditions;
Alternatively, this can be done by connecting a counter 72 and counting error pulses.

[Problems to be Solved by the Invention] In the conventional example shown in FIG. 3, in order to monitor the line quality when a plurality of digital lines are connected to the digital multiplexer IA, it is necessary to An oscilloscope 71 and a counter 72 are required.

Furthermore, in order to monitor the line quality, it is necessary for a maintenance person to go to the installation location of the digital multiplexer IA.

SUMMARY OF THE INVENTION An object of the present invention is to provide a digital multiplexing device with a line quality monitoring function that can constantly monitor the quality of a digital line and remotely display the line quality.

[Means to solve the problem]

FIG. 1 shows a block diagram illustrating the invention in detail.

In the block diagram of the principle of the present invention shown in FIG. 1, 1 is a digital multiplexer having an error detection unit IO, and 20 is an error detector provided in the digital multiplexer 1 for setting the line quality limit of the digital line. Limit setting means 30 counts error pulses output from the error detection section 10 provided in the digital multiplexer 1, and outputs an alarm when the line quality limit set by the error limit setting means 20 is exceeded. 40 is a display means for displaying the alarm output generated by the counting means 30; 50 is an interface means for outputting the alarm output generated by the counting means 30; This is a means to solve this problem.

[For production]

The error detection unit 10 generates an error pulse every time a line error is detected.

The error limit setting means 20 sets an error limit for issuing an alarm display, the counting means 30 counts the number of error pulses, and when the number of error pulses exceeds the error limit set by the error limit setting means 20. At times, an alarm is displayed on the display means 40 in the digital multiplexer 1, and at the same time, the alarm output from the counting means 30 is displayed on the remote display device via the interface means 50, so that the digital line is always connected. It becomes possible to monitor the quality of images and remotely display the monitoring output.

[Example] The gist of the present invention will be specifically explained below with reference to an example shown in FIG.

FIG. 2 each shows a block diagram illustrating the invention in detail. The embodiment of the present invention shown in FIG. 2 includes an error detection unit 10 that generates an error pulse every time an error in a digital line is detected, and an error limit setting means 20 described in FIG. Three level setting switches (hereinafter referred to as SW) 21 to 23 and a counting means 30 count error pulses and generate an alarm output when the error pulse exceeds the error limit set by the level setting switches 21 to 23. A pulse counter 31, a display means 40 consisting of three LEDs 41 to 43 that display an alarm based on the output of the error pulse counter 31, an interface means 50 consisting of three interface circuits (hereinafter referred to as INF circuits) 51 to 53, and lNF31 to This is an example of a remote display device 60 comprising three indicator lights 61 to 63 for remotely displaying an alarm output outputted via a terminal 53.

In the above embodiment, for example, the level setting 5W21 is set to 1 error pulse, the level setting SW22 is set to 10 error pulses, and the level setting 5W23 is set to 100 error pulses.

Here, when the error detection unit 10 detects one error pulse, the output of the error pulse counter 3 causes the LED to
41 lights up. Next, the count of error pulses is continued, and when the number of error pulses exceeds 10, the LED 42 lights up, and when the number of error pulses exceeds 100, the LED 42 lights up.
ED43 lights up.

The LEDs 41 to 43 are mounted on the digital multiplexer l.

The same alarm output can be outputted to the remote display device 60 via the INFs 31 to 53 and displayed on the indicator lights 61 to 63.

Therefore, by installing this remote display device 60 in a central monitoring room or the like, it becomes possible to constantly monitor the quality of the digital line without going to the installation location of the digital multiplexer 1.

In the above-described embodiment, the error limit is set at three levels, but it is also possible to display the error limit in further subdivisions depending on the necessity for system monitoring.

Furthermore, although the explanation has been made assuming that one digital line is connected to the digital multiplexer 1, the digital multiplexer 1 to which a plurality of digital lines are connected is equipped with an error detection section for the number of lines. Therefore, by providing error limit setting means 20, counting means 30, display means 40, and interface means 50 according to the number,
Of course, the quality of multiple lines can be constantly monitored.

As mentioned above, by setting an error limit, counting the error pulses output by the error detection section, generating an alarm output when the error limit is exceeded, and displaying the output remotely, the digital line line quality at all times,
It becomes possible to monitor from a remote location.

〔Effect of the invention〕

According to the present invention as described above, it is possible to constantly monitor the line quality of the digital line connected to the digital multiplexer from a remote location.

[Brief explanation of the drawing]

FIG. 1 is a block diagram explaining the present invention in detail, FIG. 2 is a block diagram explaining the present invention in detail, and FIG. 3 is a block diagram explaining a conventional example. In the figure, 1, IA is a digital multiplexing device, IO is an error detection unit, 11 is a MON terminal, 20 is an error limit setting means, 21 to 23 are level setting switches, 30 is a counting means, 31 is an error pulse counter, 40 is a display means, and 41 to 43 are LEDs. 50 is an interface means, and 51 to 53 are INFs. 60 is a remote display device, 6 1 to 63 are indicator lights, 1 is an oscilloscope, and 2 is a counter. Figure 2 A block diagram explaining the present invention in detail Figure 2 A block diagram explaining the present invention in detail Figure 3 A block diagram explaining the conventional example

Claims (1)

[Claims] A digital multiplexing device (1) having an error detection section (10) that outputs an error pulse every time a line error is detected.
), error limit setting means (
20), and counting means (30) that counts error pulses output from the error detection section (10) and generates an alarm output when the line quality limit set by the error limit setting means (20) is exceeded. and a display means (40) for displaying the alarm output generated by the counting means (30), and an interface means (50) for outputting the alarm output generated by the counting means (30). digital multiplexer.