JPH0748700B2 - Monitoring method for PCM relay device - Google Patents

Description

The present invention relates to a monitoring system for a PCM relay device.

[Conventional technology]

Conventionally, in this type of monitoring method, a signal corresponding to an error pulse generated in the monitored repeater is returned to the line monitoring device by the intermediate monitoring device, and the line monitoring device counts the signal from the line monitoring device. According to the instructions, the called intermediary monitoring device was used to sequentially monitor the repeaters of the corresponding system.

[Problems to be Solved by the Invention] In this conventional monitoring method, in order to monitor the error of the corresponding repeater, it is necessary to count every time,
PCM using balanced pair cable such as Mb / S or 2.048Mb / S
If it is applied to a relay transmission line, it takes a very long time for this counting. Moreover, in a configuration in which repeaters are connected in multiple stages in one system between stations, the signal received by this repeater is directly used. If it outputs, the error ripple effect occurs in one system, so there is a problem that it is difficult to determine at which relay interval the error occurs.

The present invention is intended to solve such problems of the conventional ones, and provides a monitoring method aiming at shortening the time for collecting line status and locating a fault point.

[Means for solving problems]

According to the present invention, a terminal repeater and an intermediate repeater for transmitting a main signal, an intermediate monitoring device for monitoring the operation of the terminal repeater and the intermediate repeater, and a line for collecting information from the intermediate monitoring device The line monitoring device includes a start-up control circuit that issues an instruction to the intermediate monitoring device all at once for each system, and an information retrieval circuit that collects information returned from the intermediate monitoring device and locates a fault. The intermediate monitoring device selects a repeater having a corresponding system number on the basis of an instruction from the line monitoring device, counts error pulses of the received signal, and transfers the result to the line monitoring device. A monitoring system for a PCM repeater is obtained, which has a monitoring line connection circuit.

That is, in the present invention, the line monitoring device simultaneously activates the intermediate monitoring devices on the transmission line, and each intermediate monitoring device counts the error pulse generated from the reception signal of the repeater of the corresponding system until a stop instruction is given. By collecting and returning the counting result by calling the line monitoring device, the time for collecting the line status and shortening the fault locating time was shortened.

〔Example〕

 Next, the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the present invention. In the figure, 11 is a terminal repeater installed in the terminal station 1, 12 is an intermediate repeater installed in the intermediate repeaters 1 to n, 3 is an intermediate for monitoring the states of the terminal repeater 11 and the intermediate repeater 12. The monitoring device 4, is a line monitoring device installed in the station to monitor this transmission line.

In the line monitoring device 4, the activation control circuit 401 transfers the system number and the activation information to all the intermediate monitoring devices 3 through the monitoring connection circuit 403. The intermediate monitoring device 3 receives this information through the line monitoring connection circuit 303 and connects it to the error detection circuit 302 by the received signal switching circuit 301 so that the signal of the intermediate repeater 12 of the corresponding system number can be received. . The error detection circuit 302 counts error pulses of the received signal.

After a certain sample time has elapsed, the start control circuit 401 sends the system number and stop information to all the intermediate monitoring devices 3, stops the error pulse counting in the error detection circuit 302, and holds the result. After that, the line monitoring device 4 sequentially outputs the address information of the intermediate monitoring device 3, and the intermediate monitoring device 3 matching this address transfers the held error pulse count result to the line monitoring device 4. After transfer, the held count result is deleted. Upon receiving this result, the line monitoring device 4 accumulates this information in the information retrieval circuit 402 and compares it for fault identification.

〔The invention's effect〕

As described above, according to the present invention, the station monitoring device simultaneously activates each intermediate monitoring device in units of system numbers,
Simultaneously counting the reception error pulses of the repeater of the corresponding system has the effect of shortening the line state collection and fault location time.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of a PCM transmission line to which the present invention is applied. 1 ... Terminal repeater, 2 ... Intermediate repeater, 3 ... Intermediate monitoring device, 301 ... Received signal switching circuit, 302 ... Error detection circuit, 303
...... Monitoring line connection circuit, 4 ...... Line monitoring device, 401 ...... Startup control circuit, 402 ...... Information retrieval circuit, 403 ...... Monitoring line connection circuit.

Claims (1)

[Claims] 1. A terminal repeater and an intermediate repeater for transmitting a main signal, an intermediate monitoring device for monitoring the operation of the terminal repeater and the intermediate repeater, and a line for collecting information from the intermediate monitoring device. The line monitoring device includes a monitoring device, and the line monitoring device transfers the system number and the startup information to all the intermediate monitoring devices through the monitoring connection circuit and the information returned from the intermediate monitoring device. It has an information retrieval circuit for collecting and locating a fault, and the intermediate monitoring device selects a repeater with a corresponding system number based on an instruction from the line monitoring device and counts error pulses of this received signal. In a monitoring system of a PCM repeater having an error detection circuit and a monitoring line connection circuit for transferring the result to the line monitoring device, the line monitoring device simultaneously sends to the intermediate monitoring device of the transmission line. Each intermediate monitoring device counts the error pulse generated from the received signal of the repeater of the corresponding system until a stop instruction is given, and the counting result is returned by calling the line monitoring device. Device monitoring method.