JPH039670B2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Technical Field of the Invention The present invention relates to a digital exchange, and in particular to a signal monitoring system for monitoring signals transmitted via digitized subscriber lines for maintenance tests, etc. Regarding improvements.

(b) Background of the technology Conventionally, the terminal devices housed in a telephone exchange are telephone-based terminal devices mainly consisting of telephones, and the subscriber line connecting the terminal device and the exchange is used to transmit and receive voice signals transmitted and received by the terminal device. In addition, various signals for switching connections identified by intermittent DC signals or multi-frequency signals within the voice band (for example, push-button-dial signals) were transmitted in analog form. In such analog type subscriber lines, the speech line and signal line are integrated, and the types of signals are limited, so it is necessary to check the status of the subscriber line for maintenance, testing, etc. In some cases, subscriber line conditions could be easily monitored by directly monitoring the subscriber line. However, by digitizing telephone exchanges and digitizing subscriber lines, information transmission capabilities were expanded, and the terminal equipment connected to subscriber lines became not only conventional telephone terminals, but also non-telephone terminals. There is now a possibility that they will be detained. With the diversification of such terminal devices, the complexity of signals transmitted via subscriber lines is expected to increase. On the other hand, in digitized subscriber lines, signals indicating the status of the subscriber line are sent in the form of digital information, so even telephone terminal equipment cannot use the same method as when transmitting signals in analog format to determine the status of the subscriber line. unable to monitor
Furthermore, with non-telephone terminal devices such as those mentioned above, there are many situations in which digital signals are not being sent even when communication is in progress, so it is impossible to grasp the status of subscriber lines with a simple monitor. It's summery. For this reason, digital signals from subscriber lines are analyzed and the subscriber line status is converted into an easy-to-understand format for testing purposes during installation work and maintenance, such as accommodating new terminal equipment, changing signaling systems, and faults. A signal monitoring device is used that displays the However, since conventional signal monitoring devices require a great deal of effort to connect each time to the subscriber line to be monitored, it is necessary to develop a means to easily monitor subscriber line signals for installation and maintenance purposes. It's summery.

(c) Prior Art and Problems FIG. 1 is a diagram showing an example of a conventional signal monitoring system in this type of digital exchange. In FIG. 1, a terminal device 1 is connected via a digitized subscriber line 2 to a line termination device 3 of an exchange. Via the subscriber line 2, communication information c transmitted and received by the terminal device 1 and various other signals s for exchange connection are transmitted. The signal s is transmitted to the control device 6 via the line concentrator 4 and the signal control device 5. On the other hand, the communication information c is transmitted via a communication path set on the line concentrator 4 and the distribution stage switch 7 by the control device 6 that has received the signal s. For the purpose of monitoring such signals s, a device for the exchange to perform connection operations, that is, a control device 6 that performs connection control for a large number of calls, and a signal control device 5 that controls signals necessary for connection are provided. A signal monitoring device 8 is provided. The signal monitoring device 8 inputs and analyzes the digital signal transmitted to any one subscriber line, and records, for example, the transmission and reception status of the signal in text or form.
This is a device that converts and displays the subscriber line status in a format that is easy for testers to understand, such as displaying it in chronological order using symbols. In order for a tester or the like to monitor the signal s transmitted via an arbitrary subscriber line 2, the circuit termination device 3 to which the subscriber line 2 to be monitored is connected is required.
A monitoring path m is set between the connection point of the line concentrator 4 and the signal monitoring device 8, and the signal s passing through the connection point is monitored by the signal monitoring device 8.

As is clear from the above explanation, in the conventional signal monitoring system, the signal monitoring device 8
It is necessary to set up a monitoring path m between the connection point of the necessary line termination device 3 and line concentrator 4 and the signal monitoring device 8 each time monitoring is performed. However, it had the disadvantage of requiring a lot of effort.

(d) Purpose of the Invention The purpose of the present invention is to eliminate the drawbacks of conventional signal monitoring systems as described above and to provide a means for easily monitoring signals transmitted through digitized subscriber lines. .

(e) Structure of the Invention The purpose of this invention is to provide a digital exchange that digitizes a subscriber line connecting a terminal device and an exchange, in which digital information consisting of communication information and signal information is transmitted via the subscriber line. Among them, branching means for branching only the signal information, and signals branched from the branching means corresponding to a plurality of subscriber lines are input, and the signal of an arbitrary subscriber line is selected to accommodate the subscriber line in the exchange. This is achieved by providing selection means for inputting the signal to the terminal and sending it through the exchange to a signal monitoring device which displays the status of the subscriber line.

(f) Embodiment of the invention An embodiment of the invention will be described below with reference to the drawings. FIG. 2 is a diagram illustrating a signal monitoring system according to an embodiment of the present invention. Note that the same reference numerals indicate the same objects throughout the figures. In FIG. 2, a signal monitoring device 80 is housed in the distribution stage switch 7, and a branch circuit 9 is provided between each line termination device 3 and the line concentrator 4. A circuit 10 is provided. The branch circuit 9 branches the signal s transmitted via the corresponding subscriber line 2 and transmits it to the selection circuit 10 . Selection circuit 10
is the branch circuit 9 based on the instruction from the signal control device 50.
One of them is selected, and the signal s transmitted from the branch circuit 9 is inputted to one subscriber line receiving terminal of the line concentrator 4 as communication information c. A communication path used as a monitoring path m is fixedly set between the subscriber line accommodation terminal and a signal monitoring device 80 accommodated in the distribution stage switch 7, and the selection circuit 10 The detected signal s is transmitted to the signal monitoring device 80 via the monitoring path m. Therefore, the subscriber line 2 to be monitored is sent to the signal control device 50 via the control device 6 in advance.
If the selection circuit 10 is made to select the branch circuit 9 corresponding to the subscriber line 2 to be monitored by specifying , the selection circuit 10 and the monitoring path m, the signal is transmitted to the signal monitoring device 80 and monitored.

As is clear from the above description, according to this embodiment, an instruction is input to the signal control device 50 via the control device 6, and the selection circuit 10 is caused to select the branch circuit 9 corresponding to the subscriber line 2 to be monitored. Thereby, the signal s transmitted via the subscriber line 2 is automatically transmitted to the signal monitoring device 80.

It should be noted that FIG. 2 is merely one embodiment of the present invention, and the configuration of the digital exchange, for example, is not limited to that shown in the figure, and many other modifications may be considered, but in any case However, the effect of the present invention remains unchanged. Furthermore, the signal monitoring device 80 and the subscriber line 2 to be monitored are not limited to those accommodated in the same exchange; the signal monitoring device 80 may be installed in a maintenance station, and subscriber lines accommodated in multiple remote stations. Although it is also possible to intensively monitor 2, the effects of the present invention remain unchanged even in such a case.

(g) Effects of the Invention As described above, according to the present invention, in the digital exchange, the signals transmitted via the digitized subscriber line can be automatically monitored not only within the station but also from a remote station. This greatly reduces the number of man-hours required for signal monitoring.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an example of a conventional signal monitoring system, and FIG. 2 is a diagram showing a signal monitoring system according to an embodiment of the present invention. In the figure, 1 is a terminal device, 2 is a subscriber line, and 3 is a terminal device.
is a line termination device, 4 is a line concentrator, 5 and 50 are signal control devices, 6 is a control device, 7 is a distribution stage switch, 8 and 80 are signal monitoring devices, 9 is a branch circuit, 10 is a selection circuit, and c is communication information, s is signal,
m indicates a monitoring route.

Claims (1)

[Scope of Claims] 1. In a digital exchange that digitizes a subscriber line that connects a terminal device and an exchange, the digital information consisting of communication information and signal information transmitted via the subscriber line, A branching means for branching only signal information, and inputting the signals branched from the branching means corresponding to a plurality of subscriber lines, selecting a signal of an arbitrary subscriber line, and inputting it to a subscriber accommodation terminal of the exchange. 1. A signal monitoring system comprising: a selection means for transmitting the signal to a signal monitoring device that displays the status of the subscriber line via the exchange.