JPS63246996A - Device for preventing unauthorized communication in building group supervising control system - Google Patents

Abstract

PURPOSE:To prevent unauthorized communication between a center device and a remote terminal, by attaching a group number at every building group at under control, transmitting the number and a building number at the time of communicating a supervisory control content in advance mutually, and collating the numbers at the center and the re mote terminal. CONSTITUTION:A telephone number storage part 11 and a group number storage part 12 attached at every building number are provided, and also, a transmission part 16 which couples the building number and the group number and transmits it to the remote terminal is provided at the center device. Also, a building number setting part 20 and a group number setting part 21 are provided, and a collating part 22 which decodes and collates the building number and the group number transmitted from the center device by the outputs of both setting parts 20 and 21 is provided at the remote terminal. And the remote terminal decodes and collates the building number and the group number transmitted from the center device by the building number and a group number setting output set in advance, and normal communication is performed between the center device and a prescribed remote terminal when a correct result is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application This invention relates to an unauthorized communication prevention device in a building group monitoring and control system.

B9 Summary of the Invention This invention uses telephone lines to communicate monitoring and control contents between a central device having a monitoring control unit and remote terminals installed in a group of buildings to be monitored and controlled, which are scattered far away. In a device that prevents unauthorized communication when communicating about information, a group number is assigned to each group of buildings monitored by each center device, and the Hilding number and group number are transmitted in advance when communicating about monitoring control details. death,
By comparing the building number and group number at the destination, unauthorized communication with the Hilding group, which is monitored by each center device, is reliably prevented.

C9 Conventional technology Figure 8 is an explanatory diagram of the configuration of a conventional building (hereinafter referred to as building) group monitoring and control system.
, I3 are four remote terminals No., 1, respectively.
- No. 4 is to be monitored and controlled. here,
Remote terminal No., I=No.

Set the building number of No. 4 as "01" to "04" and set the telephone number as shown. Group 1 is remote terminal numbers 1 to N014 monitored by center device A, and group 2 is remote terminals N091 to N091 to be monitored by center device B.
o, 4. In addition, the building number is a group! .

The reason why both of them are the same is because of the demand for standardization of the device.

D1 Problems to be Solved by the Invention In the building monitoring and control system configured as shown in FIG. when dialing a different phone number by mistake, e.g. (+
23) When dialing 1116, a problem arises in that it ends up communicating with remote terminal No. 2 of group 2.

E. Means for Solving Problems This invention provides telephone communication between a central device for building a building monitoring control unit and remote terminals installed in a group of buildings to be monitored and controlled, which are scattered far away. In a system that uses a line to communicate about monitoring and control contents, a transmitter includes a telephone number storage section assigned to each building number and a group number storage section, and also combines the building number and group number and transmits the combined result to the remote terminal. The center device is configured by providing a building number setting section and a group number setting section, and a collation section for decoding and collating the building number and group number sent from the center device using the outputs of both setting sections. The remote terminal has already been configured.

From the F8 action center device, the building number and group number are combined and transmitted to a predetermined remote terminal. The remote terminal deciphers and compares the building number and group number sent from the center device using the preset building number and group number setting output, and when the results are correct, establishes normal communication with the center device and the specified remote terminal. This is done between terminals.

G. Example An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1A is a block diagram showing a center device equipped with a monitoring control section (not shown), and FIG. 1B is a block diagram showing a remote terminal. First, the center device will be described with reference to FIG. 1A. In FIG. 1A, 11 is a telephone number storage unit assigned to each building number determined by the memory location, I2 is a group number storage unit assigned to each building n to be monitored and controlled by each center device; Storage units 11 and 12 are keyboard I
3 and the setting section 14. 15 is a CR that displays the information when setting it on the keychain 12.
This is the T display section.

Reference numeral 16 denotes a transmitting unit, and when this transmitting unit I6 is given a transmission request (request for which building to communicate with), it reads a predetermined telephone number and group number from the telephone number storage unit 11 and the group number storage unit 12. Connecting part 171μ Those numbers (building number,
telephone number and group number). The transmitting section 16 is connected to the coupling section 1
First, a line connection is made using the telephone number given to 7 (the telephone number is used to establish the line). Once the line is established, the remaining building and group numbers are combined and sent to the remote terminal. In addition, 18 is a receiving unit that receives a signal transmitted from a remote terminal, which will be described later.
Reference numeral 9 is a collation unit that collates the transmitted signals. Furthermore, in the above explanation, the building number is recognized by the transmission requesting side, so the building number and the group number are combined, but the building number on the transmission requesting side is only used to specify the address of the storage unit It,+2; The building number connected to the building number may be output from the storage unit 11 after some code conversion.

Next, the remote terminal will be described with reference to FIG. 1B. In FIG. 1B, 20 is a building number setting section set by a mechanical switch such as a dip switch;
1 is a group number setting section set by the same dip switch, and the setting outputs of both setting sections 20 and 21 are given to the collation section 22. 23 is a receiving unit that receives the building number and group number transmitted from the center equipment through the telephone line;
The received building number and group number are collated by the collation unit 22. If the verification result is correct, communication is started between the center device and the remote terminal.

Reference numeral 24 represents a transmitter for calling the center device from a remote terminal, and 25 represents a telephone number setting portion for the center device.

FIG. 2A is an explanatory diagram of a general hardware configuration of a center device. In FIG. 2A, 31 is a CPU.

32 is a memory, 33 is a magnetic disk, 34 is a floppy disk, 35 is a message typewriter, 36 is a logging typewriter, and 37 is a communication interface. Communication is made with the remote terminal via a communication interface 37.

Note that the keyboard and CRT are shown with the same reference numerals as in FIG. 1A.

FIG. 2B is an explanatory diagram of a general hardware configuration of a remote terminal device. In FIG. 2B, 4I is a CPU,
42 is a memory, and 43 is a PIlo.

44 is a communication interface.

Next, the operation of the embodiment will be described. First, before starting actual operation, in the center device, the building group number corresponding to each building number is stored in the storage section 12 via the setting section 14 using the keyboard 13 as shown in the flowchart shown in FIG. Third
Step S in the figure selects the building number "1", and based on the result, the building group number is set using the keyboard 13 in step S. In step S3, it is determined whether the group numbers of all buildings have been set, and if the result of the determination is "NO", the process of step S4 is performed until the setting of all buildings is completed. ,
The same thing can be done for telephone numbers.

The processing when a transmission request is given to the transmission section 16 after storing the telephone number and group number in the storage sections 11 and 12 as described above will be described. This process is performed as shown in FIG.

In FIG. 4, step S is a process of sending a communication request to building number "N", and when this communication request is given to the transmitting section 16, a command is manually input from the transmitting section 16 to the storage section 11.12. .

With this command, the address of building number 1"NJ is specified in step S. After this, in step S3, the address of group number GrN
Read J. The building number rNl and the group number GrNJ are connected at a connecting portion 17. After this connection, the telephone number of the building number rNJ is dialed in step S4, and a line connection signal is given from the transmitter 16 to the remote terminal in step S5. The line connection is determined in step Ss, and if the determination result is rNOj, the processing in step S is performed until the result becomes rYES.

If the line connection is established in step S, the transmission control procedure in step S7 is carried out (here, it is confirmed that the parties are of the same type). The result of this implementation is determined in step S8. After confirming step SIl, the process proceeds to step S8 in which the building number rNJ and group number GrNJ are transmitted. Step S. If confirmation cannot be obtained, the process of step S7 is repeated until a predetermined timeout. After the process in step S9, the receiving unit 23 of the remote terminal receives the building number rNJ and the group number GrNJ. The determining unit in step sho determines whether this received signal is correct or incorrect, and if it is determined to be correct as a result of verification, a data link is established and communication is started. If it is determined in step 81G that there is an error in the verification, the process is performed in step SI+ for unauthorized communication processing.

By processing as described above, it is possible to prevent unauthorized communication between the center device and the remote terminal.

FIG. 5 is a flowchart of the operation of the center device when the remote terminal operates in response to a transmission request from the center device. In FIG. 5, step Sl is a process in which the transmission control procedure is executed and it is confirmed that the parties are of the same type. After this step S, the building number and group number are sent from the remote terminal, and the receiving unit ! 8 (step S2).

The signal received by the receiving unit 18 is collated by the collating unit I9 (
In step S3), the determination unit in step S4 determines whether the verification is correct or fraudulent. If the result of the judgment is correct, the verification "OK" is sent to the remote terminal via step S5. When it is determined in step S4 that the communication is fraudulent, the fraudulent communication process in step S8 is performed.

Figure 6 is a flowchart for when there is a transmission request from the remote terminal to the center device, and Figure 7 is a flowchart for transmitting an answerback signal from the center device to the remote terminal when there is the transmission request in Figure 6. It is a flowchart. Since the flowcharts in FIGS. 6 and 7 are explained in the same manner as in FIGS. 4 and 5, detailed explanation thereof will be omitted.

H. Effects of the Invention As described above, according to the present invention, a group number is assigned to each group of buildings under the control management of a center device, and each building group is given a Hilding number and a Hilding number in advance when communicating regarding monitoring and control contents. Since the group number is transmitted and the hill number and group number are verified at the center and remote terminals, unauthorized communication between the center device and the remote terminals can be reliably prevented.

[Brief explanation of drawings]

FIG. 1 Δ and B show an embodiment of the present invention.
Figure A is a block diagram of the center device, Figure 1B is a block diagram of the remote terminal, and Figure 2A is a block diagram of the remote terminal. B is an explanatory diagram showing the general hardware configuration of the center device and remote terminals, FIGS. 3 to 7 are flowcharts for explaining the operation of the embodiment, and FIG. 8 is for explaining unauthorized communication in the conventional example. This is a diagram. II...Telephone number storage section with building number attached, 12...
・Group number storage section, 16.24... Transmission section, 17...
Coupling unit, 18.23... Receiving unit, 19.22... Collation unit. Figure 1A Figure 1B Figure 2A Figure 2B Figure 4Figure 6 Group 1

Claims (1)

[Claims] (1) A center device having a building monitoring control unit;
In a system that uses telephone lines to communicate information about monitoring and control with remote terminals installed in a group of buildings that are subject to monitoring and control that are scattered far away, a telephone number storage unit that is assigned to each building number. At the time of communication, the telephone number of the building to be communicated is read out from the telephone number storage section, dialed, a line is established, and the building number and the group number corresponding to that building are set as the group number. The center device is configured by providing a transmitting section that reads from a storage section, combines the two, and transmits to the remote terminal, and includes a building number setting section and a group number setting section, and a building number sent from the center device. An unauthorized communication prevention device in a building group monitoring and control system, characterized in that the remote terminal is configured by providing a collation unit that decodes and collates the group number and the group number based on the outputs of both setting units.