JPH0215738A - Method for confirming equipment identification number of communication terminal equipment by ciphering - Google Patents

Abstract

PURPOSE:To individually designate specific terminal equipment by sending a ciphered equipment identification number from the terminal equipment side to a public communication network side at least at the time of transmission and discriminating the propriety of providing service to the terminal equipment by collating the number with its own data on the public network side. CONSTITUTION:When an originating subscriber makes a transmission request to a public communication side I by lifting up a receiver, the network side I makes preparatory works for ID reception and outputs an ID requesting signal. The telephone set A on the terminal equipment side II sends its ciphered ID to the network side I. The network side I collates the sent ID and discriminates whether or not the transmission can be made to the terminal equipment. The telephone set A automatically sends the ciphered ID at every fixed period while the transmission is made and the public communication network side I discriminates the sent ciphered ID. The network side I continues the transmission when a discriminated result indicates the telephone set A to which the transmission is permitted, but discontinues when a discriminated result is that the sent ID does not indicate the telephone set A.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention relates to a public communication network, communication terminal equipment connected directly or indirectly to the public communication network, and connection to a private branch exchange network other than the above. The present invention relates to a method for confirming a device identification number of a communication terminal device using encryption for use with a communication terminal device.

[Conventional technology]

Conventionally, the public communication network side has been given the device identification number (hereinafter referred to as I) of the terminal device.
When it is necessary to know information such as D), information held within the public communication network is used. The information in the public communication network is the information at the time of terminal device registration, and since it is managed on a line-by-line basis, when multiple terminal devices are connected to the same line, each terminal device is not identified. Charges are also handled on a per-line basis, and it is not possible to identify which terminal device on the same line the call was made from.

(Problems to be Solved by the Invention) As mentioned above, when relying only on information within the public communication network, it is difficult for the public communication network to immediately know about movements or changes in terminal equipment between lines. I can't.

Furthermore, when a plurality of terminal devices are connected to a line, depending on the type of service, there is a possibility that a terminal device inappropriate for billing may be connected to the line.

Similarly, - if multiple terminal devices are connected to the line,
It is difficult to specify and communicate with only a specific terminal device. Further, since the terminal device itself does not transmit identification information, the terminal cannot be identified, which causes the above-mentioned problems.

This invention was made to solve the above-mentioned problems, and involves transmitting an encrypted ID from a terminal device, receiving and analyzing it on the public communication network side, and determining whether or not to provide a service. The purpose of the present invention is to provide a method for confirming the device identification number of a communication terminal device using encryption, which enables a variety of services.

[Means for Solving the Problems] The method for confirming the device identification number of a communication terminal device by encryption according to the present invention includes transmitting an encrypted device identification number from the terminal device to the public communication network side at least at the time of making a call; On the other hand, the public communication network side receives the device identification number from the terminal device, compares it with its own data, identifies the terminal device, and makes a decision as to whether or not to provide the service.

[Operation] In this invention, the device identification number is sent from the terminal device to the public communication network side, and the public communication network side checks it with its own data to determine whether or not the terminal device is allowed to provide the service.

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a diagram showing a connection relationship between a public communication network and a terminal device and an overview of ID transmission/reception operations to explain an embodiment of the present invention, and FIG. 2 is a flowchart of the connection operation according to the present invention. . The operation of the embodiment shown in FIG. 1 will be described below with reference to FIG. 2. In addition, (1) to (12) in Figure 2
indicates each step.

In FIG. 1, ■ indicates the public communication network side, II indicates the terminal equipment side, III indicates the line, and AD indicates the telephone set.

When the caller picks up the handset and requests the public communications network side I to make a call (1), the public communications network side prepares to receive the ID.
(2) Issue an ID request signal. Telephone A on the terminal device side II sends the encrypted ID to the public communication network side I (3). The public communication network operator refers to the ID and determines whether or not the terminal device is allowed to make calls (4). (5). If it is acceptable, the caller confirms that a dial tone (DT) is being output (6), then turns the dial and sends the dialed digits (7). If it is not allowed, the public communication network side I will not accept the dial. The device on the public communication network side I connects by dialing digits (8
), the call status is established.

Telephone A automatically sends out an encrypted ID at regular intervals during a call (9), and the public communication network I judges the sent encrypted ID (10) and remains a phone that is allowed to make outgoing calls. The call will continue for a while, and if it is not acceptable, it will be disconnected. If you disconnect the call on the public communication network side I, the call will end (1
1) If the caller continues the call, repeat this operation (9
) to (12)), if you want to stop the call, it will end.
If necessary, the encrypted ID will also be sent at the end of the call.
Check the terminal device and then exit.

1 among multiple telephones A-D connected to the same line IH
When it is desired to allow only one telephone to make a call, conventionally a plurality of telephones A to D are connected to one line as shown in FIG. Assume that A is a phone that can make calls, and B and C are phones that do not want to make calls.

Conventionally, if you want to do the above, you have to modify telephones B and C so that they cannot make calls, but it is necessary to connect unmodified telephone D (which can make calls) to the telephone line of telephone C. In other words, it becomes possible to make calls from the telephone. However, if this invention is used, such inconvenience will not occur.

Note that in the above embodiment, various well-known encryption methods can be used as the encryption means, so the details thereof will be omitted. Also, if you send an encrypted ID, there is a risk that it will be intercepted even if it is encrypted as it is always the same.
In order to prevent this, it is effective to randomly change the number each time you make a call. For example, the ID may be modulated in response to a command from the public communication network operator.

[Effects of the Invention] As explained above, the present invention transmits an encrypted device identification number from the terminal device to the public communication network side at least when making a call, and on the other hand, on the public communication network side, the device identification number from the terminal device By receiving the identification number and comparing it with its own data to identify the terminal device and decide whether to provide the service, it is possible to Specific terminal devices can be individually specified. By using such an individual designation function, it is possible to provide more diverse services than before, and there is an advantage that unauthorized terminal equipment can be detected.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a connection relationship between a public communication network and a terminal device and an overview of ID transmission/reception operations to explain an embodiment of the present invention, and FIG. 2 is a flowchart of the connection operation according to the present invention. FIG. 3 is a diagram showing the connection relationship between a public communication network and terminal equipment for explaining a conventional connection method. In the figure, ■ is the public communication network side, II is the terminal equipment side, III is the line, and A to D are the telephones.

Claims (1)

[Claims] In a terminal device connected to a public communication network, the terminal device sends an encrypted device identification number to the public communication network side at least when making a call, and on the other hand, the public communication network side transmits an encrypted device identification number from the terminal device to the public communication network side. A method for confirming a device identification number of a communication terminal device using encryption, characterized by receiving the device identification number, comparing it with data held by the terminal device, identifying the terminal device, and determining whether or not to provide a service.