JPH0451748A - Communication system interconnecting terminal equipment - Google Patents

Abstract

PURPOSE:To prevent illegal use of a private line by registering identification information of a terminal equipment to which the use of the private line is to be allowed in advance and permitting the use of the private line when the identification information sent at the arrival of a call is registered. CONSTITUTION:When a call comes from a terminal equipment 1 with identification information registered in advance thereto to a transmitter-receiver 2, a switch section 21 is closed and an opposite transmitter-receiver 4 is called via a private line 5. The transmitter-receiver 4 makes dialing to an ISDN network 200 accordingly. As a result a caller terminal equipment 1 connects to the ISDN network to which an object called terminal equipment belongs and receives an incoming address of an object terminal equipment 3 to call the opposite terminal equipment. Moreover, when a call comes from the terminal equipment whose use of the private line 5 is not permitted to the transmitter-receiver 2, the call is not registered in a registration means 51, resulting that the line interrupt procedure is taken. Thus, illegal use of the private line 5 is prevented.

Description

[Detailed description of the invention] [Object of the invention] (Industrial application field) The present invention connects l5DN networks by a dedicated line,
This relates to a communication system that connects terminal devices belonging to 15DNIIIl, respectively.

(Prior art) In recent years, in order to meet the various service requests of subscribers, l5D
The N network has now appeared. For example, this ISDN network ■
According to the series, there are two 64-bpS channels (B channels) on one subscriber line and a 16KbpS line (
D channel) is multiplexed and transmitted between the subscriber terminal equipment and the I5DN switch.

By the way, in the 15DN network, call charges increase as the distance between terminal devices increases, so companies etc. connect multiple 15DN networks with their own dedicated lines to reduce call charges. Communication systems are being built horizontally.

FIG. 3 shows an example of the above communication system. In the figure, reference numeral 100 indicates the I5DN network, to which terminal devices 11 to shells are connected, and transmitting/receiving devices 21 to 2o are also connected.

On the other hand, the terminal equipment 31 to
3IIl and transmitting/receiving devices 4 to 4 are connected. The transmitting/receiving devices 21-2o and the transmitting/receiving devices 41-4n are connected by dedicated lines 51-5n.

In this system, when the terminal device 11 communicates with the terminal device 31, the terminal device 11 communicates with the 1SDN network 100.
The transmitting/receiving device 21 is called via.

A dedicated line 51 is connected between the transmitting/receiving device 21 and the transmitting/receiving device 41.
If the line connection is made with
The terminal device 31 is called via the SDN network 200. As a result, a communication path between the terminal device 11 and the terminal device 31 is formed.

(Problem to be Solved by the Invention) However, according to the above-mentioned terminal device connection communication system, if the terminal device is connected to the 15DN network 100, 200, the transmitting/receiving device 21-2 or the transmitting/receiving device 41-4o is Since the subscriber can make a call, there is a problem in that if the number of the call (subscriber number) is known, the dedicated lines 51 to 5o may be used illegally.

Therefore, the transmitting/receiving devices 21-2. or transmitting/receiving device 41~
It is possible to make the calling number of 4n secret, but not only is it difficult to manage the secret, but also the transmission/reception device 21 to 2 may
Since there is a possibility that the calling number of n or the transmitting/receiving devices 41 to 4 may be known, it is not possible to take thorough measures.

The present invention was made to solve the problems of the conventional terminal-to-terminal connection communication system as described above, and its purpose is to prevent the illegal use of dedicated lines connecting between networks. The purpose of the present invention is to provide a terminal-to-terminal connection communication system.

[Structure of the Invention] (Means for Solving the Problems) In the present invention, a terminal device and a transmitting/receiving device are connected, and identification information of a calling terminal is transmitted to a called terminal via a dedicated line between a plurality of networks. a registration means in which identification information of a terminal device that is connected to the transmitting and receiving device of the terminal device connection communication system connected by the transmitting and receiving device and that is to be permitted to use the dedicated line is registered in advance; registration detection means for receiving identification information of a terminal device of a calling party and detecting whether or not the identification information is registered in the registration means; and usage management means for managing the usage of the dedicated line of the terminal equipment, thereby configuring an inter-terminal equipment connection communication system.

(effect) According to the above configuration, a call is made from the network to the called terminal.

Since the identification information of the terminal will be sent to you, please register the identification information of the terminal that should be allowed to use the dedicated line in advance.
When the identification information sent at the time of incoming call is registered, the use of the dedicated line can be permitted, and illegal use of the dedicated line can be prevented.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings. FIG. 1 shows an inter-terminal connection communication system according to an embodiment of the present invention. In this figure, the same components as in FIG. 3 are given the same reference numerals as in FIG. 3, and their explanations will be omitted. In this embodiment, a management device 501 is connected to the transmitting and receiving devices 21 to 2o, and a management device 502 is connected to the transmitting and receiving devices 41 to 4n.

FIG. 2 shows a detailed block diagram of the management device 50 and the transmitting/receiving device 2(4). ■SDN line 6 extending from l5DN network
A switch section 21 and a control section 22 are connected to the private line 1 and the dedicated line 5. The switch section 21 is constituted by a normally open switch, and when the control section 22 receives a calling signal from the dedicated line 5-1, it issues a call to the I5DN III via the I5DN line 61 and controls the switch section 21 to close it.

On the other hand, when the destination address and calling address for a call are sent from the l5DN line 61, it detects that the call is to its own device based on the destination address, and extracts the calling address (identification information of the calling terminal). It is sent to the management device 50. The management device 50 includes a registration means 51 and a registration detection means 52.
and are included. Identification information of terminals to be permitted to use the dedicated line 5 is registered in advance in the registration means 51. The registration detecting means 52 receives the originating address sent from the control unit 22 of the transmitting/receiving device 2, and this originating address is registered as the registration means 5.
1, and returns the result. The control unit 22 determines that the result sent from the registration detection means 52 is “
When it indicates "Registered", the switch section 21 is controlled and closed. Further, when the result sent from the registration detecting means 52 indicates "no registration j", the process moves to disconnection of the ISDN line 61.

Since the configuration is as described above, when a call is received from the transmitting/receiving device 2/\\ from a terminal device whose identification information has been registered in advance, the switch section 21 is closed and the dedicated line 5 is closed.
A call is made to the opposing transmitting/receiving device 4 via. In response to this, the transmitting/receiving device 4 makes a call to the 15DN network 200. As a result, the originating terminal device 1 is connected to the 15DN network to which the destination terminal device belongs, and by inputting the destination address of the destination terminal device 3, the destination terminal device can be called. will be held.

Note that each terminal device 1 (3) and transmitting/receiving device 2 (4) is equipped with an interface for ISDNIM, and the originating address, destination address (if necessary, originating subaddress,
The destination sub-address is also sent and received.

Further, in the above case, if a call is received from a terminal device that is not permitted to use the dedicated line 5 to the transmitting/receiving device 2, it is not registered in the registration means 51, and as a result, a procedure is taken to disconnect the line. This prevents the dedicated line 5 from being used illegally.

Note that the present invention is not limited to the above embodiments, and various modifications are possible. For example, in this embodiment, in order to call the transmitting/receiving device 2 from the terminal device 1 on the calling side, the destination address (address of the transmitting/receiving device 2) is sent, and after connecting to the l5DN network 200 to which the terminal device on the other end belongs,
Although the destination address of the other party's terminal device is sent, these two destination addresses may be sent consecutively at the beginning. When doing this, the control unit 22 receives consecutive destination addresses, separates them into predetermined digits, detects the destination address for its own device, holds the destination address of the other party's terminal device, and sends the message when permission is granted to use the dedicated line 5. Do it like this. Alternatively, signals received by a plurality of transmitting/receiving devices may be multiplexed and sent through one dedicated line, separated at the receiving end, and sent to the plurality of transmitting/receiving devices. Furthermore, a management device may be provided for each transmitting/receiving device, and each transmitting/receiving device may be permitted to use the dedicated line.

[Effects of the Invention] As explained above, according to the present invention, since the identification information of the calling terminal is sent from the network to the called terminal, the
Identification information of terminals that should be allowed to use the dedicated line is registered, and if the identification information sent when a call is received is not registered, it is possible to prevent illegal use of the dedicated line.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of one embodiment of the present invention, and FIG. 2 is a block diagram of an embodiment of the present invention.
FIG. 3 is a block diagram of a conventional terminal-to-terminal connection communication system. 11-12.31-3III...terminal device 2-2
2.41~4o... Transmitter/receiver 1 0°5.51~5. . . . Dedicated line 21 . ...l5DN network

Claims (1)

[Claims] Inter-terminal device connection communication in which a terminal device and a transmitting/receiving device are connected, and a plurality of networks are connected by the transmitting/receiving device via a dedicated line, and identification information of a calling terminal is sent to a called terminal. In the system, a registration means in which identification information of a terminal device connected to the transmitting/receiving device and to be permitted to use the dedicated line is registered in advance, and identification information of the calling side terminal device sent from the network when a call is received. a registration detection means for receiving the identification information and detecting whether or not the identification information is registered in the registration means, and managing the use of the dedicated line of the terminal device on the calling side based on the detection result of the registration detection means. What is claimed is: 1. A communication system for connection between terminal devices, comprising: usage management means for controlling the use of terminal devices.