JPS6220458A - Remote control system - Google Patents

Abstract

PURPOSE:To share the input/output device of a master station among slave stations by providing a line switching device between slave station lines and the input/output device in the master station and connecting a slave station and the input/output device of the master station in accordance with the request of the slave station or the master station. CONSTITUTION:If one or plural slave stations out of slave stations S1-Sn request the message output on a typewriter TYP In a master station M because of the occurrence of trouble, a line switching device LSW detects the signal and closes switches corresponding to pertinent slave station numbers to connect them to the typewriter TYP and outputs trouble messages. In case that the response is returned to slave stations, a signal is inputted from the typewriter TYP and is outputted to pertinent slave stations through the same route in the switching circuit. In case that a signal is transmitted to the other slave stations, pertinent slave station numbers are inputted from the typewriter TYP, and the line switching device LSW detects them to connect the typewriter TYP to designated slave station lines.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention centralizes a plurality of unmanned switching centers in a telephone set,
This invention relates to a remote control system for exchanging signals between these unmanned exchanges and maintenance stations.

(Prior Art) In order to remotely control a slave station from a master station, an input/output device (typewriter, magnetic tape device, etc.) for transmitting information for exchanging signals between stations is installed in the master station.

This input/output device is used for transmitting information on failures occurring in slave stations and for corresponding control instructions from the master station.
There is a possibility that each slave station will be used at the same time, so input/output devices have been installed in the master station for each slave station.

(Problems to be Solved by the Invention) The above-mentioned conventional remote control input/output devices are mainly intended for the master station to analyze and respond to failures in the slave stations. The current situation is that the more reliable a device is, the lower the probability of a failure occurring, and the less frequently it is used.

However, as switching systems become more reliable and maintenance becomes simpler and more labor-saving, switching centers become unmanned and maintenance stations (master stations) tend to accommodate a large number of unmanned stations (slave stations). Although many remote control input/output devices have low efficiency, they are installed in a large number in one master station, and floor space must therefore be secured, which is uneconomical.

SUMMARY OF THE INVENTION An object of the present invention is to provide a remote control method that can simplify the configuration of the master station and make it more economical in a system consisting of a plurality of slave stations and one master station.

(Means for Solving the Problems) In order to achieve the above object, the remote control system according to the present invention includes an information transfer system between a plurality of slave stations and a master station provided in common to each slave station. The master station is equipped with a line switching device that accommodates the lines from each slave station and is connected to the input/output device in the master station, and when there is an information transfer request from the slave station, the slave station number fi: When the input/output device specifies a slave station and an information transfer request is sent, the slave station number is identified and the corresponding slave station line is connected to the input/output device. It is configured to connect the office line.

According to the above configuration, only one input/output device is installed in the master station to accommodate a large number of slave stations, and the object of the present invention is completely achieved.

(Example) Hereinafter, the present invention will be explained in more detail with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the remote control system according to the present invention, and is a connection diagram between a slave station and a master station.

When one or more of the slave stations S1 to Sn requests the typewriter of the master station M to output a message due to a failure, the line switching device LAW detects the signal and outputs a message to the corresponding slave station number. Close the corresponding switch and connect to typewriter TYP to output a fault message.

If you want to send the answer back to the slave station, continue using the typewriter T.
A signal is input from YP and the signal is output to the corresponding slave station through the same path within the switching circuit.

If it is desired to transmit a signal to another slave station, the corresponding slave station number is input from the typewriter TYP, and the line switching device LsW detects this and connects the typewriter TYP to the specified slave station line.

FIG. 2 is a block diagram showing an embodiment of the line switching device shown in FIG. 1.

The line switching device is a modulation/demodulation device MD, a serial/parallel conversion circuit AP/
It is composed of a T1 processing unit CPU and a multiplexer MPX.

When a request is received from one of the slave stations, the request signal is demodulated by the modulation/demodulation device MD, and the serial signal is further converted into a parallel signal by the serial/parallel conversion circuit A R, T, and then input to the processing device CPU. . The processing unit CPU identifies the slave station number from the input signal and issues an instruction to the multiplexer MPX to connect the slave station line to the typewriter TYP.

As a result, the corresponding slave station is connected to the typewriter TYP via the modulation/demodulation device MD, the serial/parallel conversion circuit ART, and the multiplexer MPXI.

Next, when the slave station number is specified by the typewriter TYP, the processing unit CPU detects this and outputs a line switching instruction to the multiplexer MPX if the line other than the specified line is connected and in the stuck state. .

(Effects of the Invention) As explained above, the present invention provides a line switching device in a master station between a slave station line and an input/output device, and connects a slave station to a master station according to a request from the slave station or an instruction from the master station. The configuration allows the connection of input/output devices for each slave station, and the structure allows the input/output devices of the master station to be used in common by each slave station, so there is no need to install input/output devices for each slave station at the master station, making it economical. This has the effect of configuring a remote control system.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of a remote control system according to the present invention, and FIG. 2 is a block diagram showing an embodiment of the line switching device of FIG. S1~Sn...Slave station LSW...Line switching device M
... Master station TYP ... Typewriter (input/output device)
MD...modulation/demodulation device AR, T...serial/parallel conversion circuit CPU...processing device MPX...multiplexer Patent applicant NEC Corporation Representative Patent attorney Inoro Hisao 1 figure 2 figure

Claims (1)

[Claims] In an information transfer method between multiple slave stations and a master station provided in common to each slave station, the master station accommodates lines from each slave station and is connected to the input/output device within the master station. A line switching device is provided, and when an information transfer request is received from a slave station, the slave station number is identified from the transfer request signal, the corresponding slave station line is connected to the input/output device, and the slave station is specified from the input/output device. 1. A remote control system characterized in that, when an information transfer request is made, the slave station number is identified and the corresponding slave station line is connected to the input/output device.