JPH0479634A - Controlling and protecting method for transmitting device of subscriber system - Google Patents

Abstract

PURPOSE:To make a hacker, etc., unable to make setting by giving the same table of random numbers to a terminal for control and transmitting device for subscriber system and allowing the transmitting device to compare a value with the value of its own table of random numbers by means of a comparing and sending mean and, when they do not coincide with each other, to disconnect the line. CONSTITUTION:After a route is set between a terminal 1 for control and trans mitting device 5 for subscriber system, a value found from a table 10 of random numbers is sent from the terminal 1 to the device 5 through a random number sending and comparing means 6. At the device 5, a comparing and sending means 7 compares the sent value with the value of its own table 10 of random numbers and, when they do not coincide, the line is disconnected. When they coincide, the device returns the sent value to the terminal 1 side. At the terminal 1, the means 6 compares the returned value with the previously sent value and, when they do not coincide, the line is disconnected. When they coincide, the calling process is completed and the device 5 is electrically set. Thererore, a hacker, etc., cannot make electrical setting from the terminal.

Description

[Detailed Description of the Invention] [Summary] A control terminal is connected to a public communication network via a first modem, and a subscriber transmission device is connected to the public communication network via a second modem. , when the control terminal calls the subscriber transmission device, a calling signal is sent to the public communication network via the first modem, and the public communication network sends a call signal to the second modem. A transmission control system that calls the subscriber-type transmission device via the subscriber-type transmission device, sets a route between the control terminal and the subscriber-type transmission device, and performs electrical settings from the control terminal to the subscriber-type transmission device. , regarding the control and protection method for subscriber transmission equipment, the purpose of this is to provide a control protection method for subscriber transmission equipment that makes it impossible for backers etc. to make electrical settings for the subscriber transmission equipment, and to provide the control terminal and the The subscriber system transmission equipment has the same random number table, the control terminal has a random number sending comparison means, the subscriber system transmission equipment has a comparison sending means, and the control terminal and the subscriber When the route between the system transmission devices is set, the control terminal sends the value obtained from the random number table to the subscriber system transmission device using the random value sending comparison means, and the subscriber system transmission In the device, the comparing and sending means compares it with the value in the random number table that it owns, and if they do not match, the line is disconnected, and if they match, the sent value is returned to the control terminal side. Then, in the control terminal, the random value sending comparison means compares the returned value with the previously sent value, and if they do not match, the line is disconnected, and if they match, the call is made. Upon completion of the process, electrical settings are made to the subscriber transmission device.

[Industrial application field]

The present invention is aimed at changing the value of an attenuator from a control terminal to equalize the line loss between a plurality of subscriber terminals in subscriber transmission equipment connected to the control terminal via a public communication network. In a transmission control system that transmits electrical setting signals, etc. for setting, a subscriber who, as a backer, etc., makes it impossible to electrically set subscriber transmission equipment connected to the system via the public communication network. This invention relates to a system transmission equipment control and protection method.

[Conventional technology]

FIG. 4 is a block diagram of a conventional transmission control system.

In FIG. 4, the control terminal 1' is, for example, a line 18
．． When sending an electrical setting signal to set the value of the attenuator 16.17 of the subscriber system transmission device 5' in order to equalize the line loss up to the subscriber terminal 20.21 connected via the subscriber line 19. When the transmission device control unit 11 sends a call command to the call processing unit 12', the call processing unit 12' sends a dial signal via the communication unit 13' as shown in the upper part of FIG. Send. The modem 2 then sends an on-hook signal and a dial signal to the exchange of the public communication network 3.

As a result, the exchange sends the ringing tone of the subscriber transmission device 5° to the modem 4.

The modem 4 sends a ringing signal to a subscriber transmission device 5' and an on-footer signal to an exchange of the public communication network 3.

The exchange then confirms that the line is connected via modem 2.4.
Let me know. The modem 2.4 notifies the communication unit 13' of the control terminal 1' and the communication unit 15' of the subscriber system transmission device 5' that the line is connected, respectively.

As a result, the control terminal 1° transmits an electrical setting signal for setting the value of the attenuator 16.17 from the transmission device control unit 11, and
Set the value of 7.

[Problem to be solved by the invention]

However, when a backer or the like learns the telephone number of the subscriber transmission device 5', he connects the terminal 31 to the public communication network 3 via the modem 30, as shown in FIG. There is a problem in that there is a risk of calling up the device and transmitting an electrical setting signal.

SUMMARY OF THE INVENTION The present invention aims to provide a method for controlling and protecting a subscriber transmission device, which makes it impossible for a backer or the like to make electrical settings for the subscriber transmission device.

[Means to solve the problem]

FIG. 1 is a block diagram of the principle of the present invention.

As shown in FIG. 1, the control terminal 1 is connected to a public communication network 3 via a first modem 2, and a second
A subscriber transmission device 5 is connected via the first modem 4, and when the control terminal 1 calls the subscriber transmission device 5, the calling signal is sent to the public via the first modem 2 The communication network 3 is sent to the public communication network 3. The subscriber-based transmission device 5 is called via the second modem 4, and a route between the control terminal 1 and the subscriber-based transmission device 5 is set;
In a transmission control system in which electrical settings are made from the control terminal 1 to the subscriber transmission device 5, the control terminal 1 and the subscriber transmission device 5 have the same random number table 10; The control terminal 1 is provided with a random value sending comparison means 6, the subscriber system transmission device 5 is provided with a comparison sending device 7, and a route between the control terminal 1 and the subscriber system transmission device 5 is set. Then, from the control terminal 1, the random value sending comparison means 6 sends the value obtained from the random number table 10 to the subscriber system transmission device 5, and the subscriber system transmission device 5 performs the comparison. The sending means 7 compares the value with the random number table 10 it owns, and if they do not match, the line is disconnected, and if they match, the sent value is returned to the control terminal 1 side, In the control terminal 1, the random value sending comparison means 6 compares the returned value with the previously sent value, and if they do not match, the line is disconnected, and if they match, the call is made. Upon completion of the process, electrical settings for the subscriber system transmission device 5 are performed.

[For production]

According to the present invention, after the route between the control terminal 1 and the subscriber transmission device 5 is set, the random value sending comparison means 6 adds the value calculated from the random number table 10 from the control terminal 1. The subscriber-based transmission device 5 compares it with the value in its own random number table 10 using the comparing and sending means 7, and if they do not match, the line is disconnected; if they match, The sent value is returned to the control terminal 1 side, and the control terminal 1
The random value sending comparison means 6 compares the returned value with the previously sent value, and if they do not match, the line is disconnected, and if they match, the call processing is completed and the subscriber Electrical settings for the transmission device 5 are made.

That is, even if a backer or the like connects the terminal 31 to the subscriber-based transmission device 5 via the public communication m3, it is impossible to transmit the values of the random number table 1O, and if this is not possible, the subscriber-based transmission will not be possible. Since device 5 will be disconnected, backers etc. will be connected to terminal 3.
1, it becomes impossible to make electrical settings for the subscriber system transmission device 5.

〔Example〕

FIG. 2 is a block diagram of a transmission control system according to an embodiment of the present invention, and FIG. 3 is a diagram showing a processing flow from route setting to electrical setting signal transmission according to the embodiment of the present invention.

In FIG. 2, the route between the control terminal 1 and the subscriber system transmission device 5 is set as shown in the upper part of FIG. Since this is the same as setting a route between the devices 5', the explanation will be omitted.

In the case of FIG. 2, the control terminal l and the subscriber system transmission device 5 each have a random number table in which the date is written on the horizontal axis, the time is on the vertical axis, and the key number is written at the intersection, as shown in (A). 10, and the clock 14 notifies the random number sending comparison means 6 and comparison sending means 7 of the current date and hour.

Therefore, when the route is set, the control terminal 1 calculates a key number from the random number table 10 at 9 hours of the current date using the random number sending comparison means 6, as shown in FIG. The time and key number are sent to the subscriber system transmission device 5 as a password.

In the subscriber system transmission device 5, the comparison sending means 7 calculates the key number from its own random number table 10 from the sent date 1 hour, as shown in FIG. 3, and the key number matches the sent key number. If they do not match, the line is disconnected, and if they match, the key number is sent to the control terminal 1.

In the control terminal 1, the random number sending comparison means 6 calculates the date 1 hour from the sent key number, as shown in Figure 3, and if it does not match the sent date 2 hours, the line is disconnected. If they match, it is determined that the call processing is complete, and the transmission device control unit 11 transmits an electrical setting signal.

In this way, even if a backer or the like connects the terminal 31 to the subscriber transmission device 5 via the public communication network 3, it will not be possible to transmit the key number for 3 hours on the same day as above. If this is not possible, the line will be disconnected, making it impossible for the backer or the like to make electrical settings for the subscriber system transmission device 5.

〔Effect of the invention〕

As described above in detail, the present invention has the effect of making it impossible for backers and the like to perform electrical settings of subscriber system transmission equipment.

[Brief explanation of drawings]

Fig. 1 is a block diagram of the principle of the present invention, Fig. 2 is a block diagram of a transmission control system according to an embodiment of the present invention, and Fig. 3 is a processing flow from route setting to electrical setting signal transmission according to an embodiment of the present invention. FIG. 4 is a block diagram of a conventional transmission control system. In the figure, 1.1' is a control terminal, 2.4.30 is a modem, 5.5'' is a subscriber system transmission device, 6 is a random number sending comparison means, 7 is a comparison sending means, 10 is a random number table, 11 is a transmission device control unit, 12.12' is a call processing unit, 13.13' and 15.15'' are communication units, 14 is a clock, 16.17 is an attenuator, 18.19 is a line, 20.21 indicates a subscriber terminal, and 31 indicates a terminal.

Claims (1)

[Claims] A control terminal (1) is connected to a public communication network (3) via a first modem (2), and a second modem is connected to the public communication network (3).
A subscriber system transmission device (5) is connected via the modem (4), and the subscriber system transmission device (5) is connected to the control terminal (1).
), a paging signal is sent to the public communication network (3) via the first modem (2), and from the public communication network (3) to the second modem (4). The subscriber system transmission device (5) is called via the control terminal (1).
In a transmission control system in which a route is set between the control terminal (1) and the subscriber transmission device (5), and electrical settings are made from the control terminal (1) to the subscriber transmission device (5), the control terminal (1) and the subscriber system transmission device (5) have the same random number table (10), and the control terminal (1) is provided with a random value sending comparison means (6), and the subscriber system transmission device (
5) is provided with a comparison sending means (7), and when the route between the control terminal (1) and the subscriber transmission device (5) is set, the control terminal (1) The random value sending comparison means (6) sends the value obtained from the random number table (10) to the subscriber system transmission device (5), and the subscriber system transmission device (5) transmits the value obtained from the random number table (10) to the subscriber system transmission device (5). In (7), compare the value with the random number table (10) that you have, and if they do not match, the line is disconnected, and if they match, the sent value is transferred to the control terminal (1). In the control terminal (1), the random value sending comparison means (6) compares the returned value with the previously sent value, and if they do not match, the line is disconnected. , a subscriber system transmission device control and protection method characterized in that, if the subscriber system transmission device (5) matches, the call processing is completed and electrical settings are made to the subscriber system transmission device (5).