JPH03188741A - Communication exchange - Google Patents

Abstract

PURPOSE:To regulate only a relay connection call by a specific medium terminal equipment by identifying a medium of a terminal equipment when a relay connec tion call is detected and inhibiting the connection of the said relay connection call when the medium is a predetermined specific medium. CONSTITUTION:A PBX 9a at a caller side identifies whether or not a call arrived in a controller 18 comes from a toll public network 1a, a relay connec tion call detection means 16 analyzes a dial number, a connection inhibit means 17 checks the possibility of medium identification and when the identification of a medium is possible, whether or not a voice call is discriminated and in the case of the voice call, the connection of the said call is inhibited. Moreover, when the medium is not directly identified, a mark representing the relay connec tion call via an exclusive network 6 is added to apply relay connection to the exclusive network 6. A controller 18 of the PBX 9a receiving the call added with the mark from the private network 6 detects a called terminal equipment to be a telephone set 7b depending on a dial number, then the connection is inhibited.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a communication switching device that relays and connects a public network and a private network to exchange communications between terminal devices using various media. [Conventional technology]

FIG. 3 is a block diagram showing a conventional communication switching device and an example of its connection configuration; 1b is the city public R network, and 2 is the city public network 1a and 1.
This is a long-distance public network between B and B. 3a and 3b are telephones as terminal devices accommodated in the city public @Ia or ib, and 4a and 4b are similarly installed in the city public @Ia or ib.
This is a data terminal as a terminal device housed in a or 1b. 5a and 5b are digital private branch exchanges (hereinafter referred to as PBX) as communication switching equipment connected to the local public network 1a or Ib, and 6 is this PBX5.
This is a dedicated network that connects a and 5b. 7a and 7b are the above P
Telephones as terminal devices housed in BX5a or 5b, 8a and 8b are the same < PBX5a or 5b
This is a data terminal as a terminal device housed in the . In addition, in PBX 5a and 5b, 11 is the PBX concerned.
This is the communication path switch 5a or 5b. 12 connects the communication line to the city public, Ila, and lb to the communication route switch 11
13 is a central office line trunk for connecting to the dedicated network 6.
This is a dedicated line trunk for connecting a communication line to the communication path switch 11. 14 is a telephone 7 as a terminal device
This is a subscriber circuit for connecting the data terminals 8a, 7b and the data terminals 8a, 8b to the communication path switch 11. 15 is this P
This is a control device that performs overall control of BX5a or 5b. Next, the operation will be explained. Conventionally, a connection between a terminal device accommodated in a public network and a terminal device accommodated in a PBX has been very common unless it is via a private network. That is, the telephone 3a accommodated in the local public network 1a
The telephone 7a housed in PBX5a has PBX5
Connection can be made without any problem via the office line trunk 12, communication path switch 11, and subscriber circuit 14 of A. However, to connect to telephone 7b housed in PBX5b, dial the area number and call the local public telephone y11a.
, out-of-town public 8M 2, local public network 1b and PBX 5b
It must be connected via PBX5 to telephone 7b.
A, connection via the dedicated m6 and PBX5 b is not legally permitted unless the dedicated network 6 is within the same toll area. Here, there are no such regulations regarding data communication, and as data terminals 4a and 4b become more widespread in general households, connections via this dedicated network 6 will increase in order to reduce communication costs. It is expected to be. To realize such communication via the dedicated network 6, it is possible to use the direct-in dial system used for specifying extensions of PBX, or a system that extends the dial-in system. For example, when a data terminal 4a accommodated in the local public network 1a communicates with a data terminal 8b accommodated in PBX 5b, in the direct in dial method, the call is first dialed to the nearest PBX 5a using the first dial. , then
PBX5 b number and data terminal 8 as second dial
By dialing the extension number b, a relay connection is made via the dedicated network 6. In addition, in the dial-in method,
The PBXs 5a and 5b have a dial-in contract with the public networks 1a and lb, and the PBXs 5a and 5b expand the dial-in number to the corresponding number, thereby allowing the dedicated 'f! 46, the data terminal 4a is relay-connected to the data terminal 8b. If such a relay connection is allowed via the dedicated network 6 for data communication, a similar operation allows relay connection via the dedicated network 6 for voice communication as well.

[Problem to be solved by the invention]

Since the conventional communication switching device is configured as described above, if relay connection via dedicated network 6 is enabled for data communication, relay connection via dedicated Y46 for voice communication, which is prohibited by the system, is possible. There were seven challenges that left me completely defenseless. The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a communication switching device that can prohibit voice communication by relay connection via a dedicated network.

[Means to solve the problem]

A communication switching device according to the present invention includes a relay connection call detecting means for detecting whether or not a relay connection call is made via a public network and a private network by dial number analysis, and a terminal of the detected relay connection call. The device is equipped with connection prohibition means that identifies the media of the device and prohibits connection of the relay connection call if at least one of the media is a predetermined specific media.

[Effect]

The communication switching device according to the present invention analyzes the dial number using the relay connection call detecting means and detects whether the communication between the terminal devices to be exchanged is a relay connection call performed via a public network and a private network. However, when a relay connection call via a public network and a private network is detected, the connection prohibition means identifies the media of the terminal device, and if at least one of them is a predetermined specific media, By prohibiting the connection of the relay connection call, a communication switching device is realized that can regulate specific relay connections.

【Example】

An embodiment of the present invention will be described below with reference to the drawings. 1st
In the figure, la, lb are local public networks, 2 is local public networks, 3a, 3b and ? a, 7b are telephones as terminal devices; 4a, 4b, and 8a; 8b is a data terminal as a terminal device, 6 is a dedicated network, 11
12 is a communication path switch, 12 is a central office line trunk, 13 is a leased line trunk, and 14 is a subscriber circuit, which are the same or equivalent parts to those in the conventional circuit with the same reference numerals in FIG. Omitted. Further, reference numeral 16 denotes a relay connection call detecting means that analyzes the dialed number and detects whether or not the communication to be exchanged is a relay connection call performed via the local public gIIla, lb and the private network 6. 17 identifies the media of the terminal device of the relay connection call detected by the relay connection call detection means 16, and if at least one of them is a predetermined specific medium, the connection of the relay connection call is determined. This is a connection prohibition method that prohibits connections. Reference numeral 18 is a control device different from the conventional control device 15 in that it includes the relay connection call detection means 16 and the connection prohibition means 17. 1
Reference numeral 9 denotes a voice identification circuit that monitors the communication path when the connection inhibiting means 17 cannot directly identify the media of the terminal device, and identifies whether or not the communication being carried out there is a voice communication. PBXs 9a and 9b are different from conventional PBXs 5a and 5b in that they use a control device 18 equipped with the relay connection call detection means 16 and connection prohibition means 17, and are equipped with a voice identification circuit 19. It is a PBX. Next, the operation will be explained. Here, FIG. 2 is a flowchart showing the procedure of the process. First, the public! PB from the telephone 3a housed in 1ila
Communication to telephone 7b housed in X9b will be explained. At the calling side PBX 9a to which the telephone 3a is connected via the local public wAla, the call received at the control device 18 is received by the local public wAla! 1ila or not (
Step 5TI). Here, since the call is from the local public network 1a, the process proceeds to step ST2, where the relay connection call detection means 16 analyzes the dialed number and determines that the call is a relay connection call to the private network 6. Identification is made as to whether or not. In this case, since the call is a relay connection call to the dedicated network 6, the connection prohibition means 17 checks the possibility of media identification in step ST3. If the local public network 1W11a is a public network that transmits a media identification signal along with call setting information, such as Integrated Services Digital M4 (ISDN), it is possible to directly identify the media, so step ST4 is performed.
It is determined whether the call is a voice call or not. Since the result of the determination is that the call is a voice call, connection of the call is prohibited. Further, if the local public network 1a is an analog network where direct media identification is not possible, the process is passed from step ST3 to step ST5, and the call is transferred to the dedicated W4.
A mark is added indicating that the call is a relay connection call via the private network 6, and the relay connection is made to the dedicated network 6. To add this mark, if the dedicated M6 is a digital network, a bint is placed at a predetermined position in the call setting information, and if it is an analog network, a special number indicating that is added to the dialing information. There are many possible methods. When the control device 18 of the PBX 9b, which receives the call with this mark from the dedicated network 6, detects from the dial number that the receiving terminal is the telephone 7b, it prohibits the connection. Next, communication from the telephone 7a housed in the PBX 9a to the telephone 3b housed in the local public network 1b will be explained. When it is detected in step STI that the call is from an extension, the relay connection call detection means 1 of the control equipment 8
6 analyzes the dialed number in step ST6 to further identify whether or not the call is a relay connection call to the public network 1b via the private network 6. In this case, since the call is a relay connection call to the public IM 1b, the process is passed to step ST7, where it is determined whether the call is a voice call or not. Since the result of the determination is that the call is a voice call, connection of the call is prohibited. Here, the method of sending the dial number is dedicated 1i16
It is necessary to take measures such as adding the corresponding PBX number (in this case, the number of PBX9b) before the central office line calling special number, but this is a problem of another technology and is not covered by this invention. Since this is not related to the essence of the above, detailed explanation will be omitted. Next, from the telephone 3a accommodated in the local public network 1a, the telephone 3b accommodated in the local public network 1b is transferred via the dedicated network 6.
We will explain the communication to. PBX9b control device 18
detects in step STI that it is an incoming call from an extension, the process proceeds to step ST8, the relay connection call detection means 16 analyzes the dialed number, and calls the local public y1.
It is determined whether or not the call is a relay connection call to 1b. In this case, since the call is a relay connection call to the public network 1b, the process is passed to step ST9, and the connection prohibition means I7 is activated in step ST3.
Check the possibility of media identification as in the case of . If the media can be identified, it is determined in step ST4 whether or not the call is a voice call, and as a result, it is determined that the call is a voice call, so connection of the call is prohibited. If it is determined in step ST9 that the media cannot be identified, the voice identification circuit 19 monitors the communication and determines whether or not it is a voice call in step ST9.
Detected by TIO. That is, the control device 18 controls the communication path switch 11 to once connect the leased line trunk 13 to the office line trunk 12, and also connects the leased line trunk 13 to the office line trunk 12.
At the same time, a voice identification circuit 19 is also connected to 3 to monitor the communication. For example, the voice identification circuit 19 analyzes the voice spectrum and matches it with the voice spectrum of specific phrases such as "moshimoshi,""haihai," and "but," or is used in facsimile or data communications. It is possible to identify whether or not the communication is a voice call by detecting a control signal based on a specific frequency or the like. Here, the voice identification circuit 19 may perform voice call identification using other methods, and is a problem of another technology unrelated to the essence of the present invention, which limits the technical scope of the present invention. It's not something you do. When the voice identification circuit 19 detects that a voice call is being made, the connection prohibition means F prohibits the connection, assuming that the other party is a voice media terminal device. In the above example, the target of relay connection call regulation is voice media, which is currently prohibited under the system. However, relay connection calls of specific media such as other data and images may be regulated. May apply to regulations. Further, in the above embodiment, a case was explained in which a digital PBX was used as a gateway between a public network and a private network, but other communication switching devices such as a local area network may also be used. It has the same effect as.

【Effect of the invention】

As described above, according to the present invention, it is detected whether or not it is a relay connection call made via a public network and a private network by dial number analysis, and when the relay connection call is detected, the terminal device's media If at least one of them is a predetermined specific media, connection of the relay connection call is prohibited. This has the effect of providing a communication switching device that can restrict only the relay connection calls.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a communication switching device according to an embodiment of the present invention and its connection configuration, FIG. 2 is a flowchart showing its processing procedure, and FIG. 3 is a conventional communication switching device and its connection configuration. It is a block diagram. la, lb are local public networks, 2 are local public networks, 3a, 3b
, 7a, 7b are terminal devices (11 talk machines), 4a, 4b, 8
a and 8b are terminal devices (data terminals); 9a and 9b are communication exchange equipment (PBX); 16 is relay connection call detection means; 17
18 is a control device, and 19 is a voice identification circuit. In addition, in the figures, the same reference numerals indicate the same or equivalent parts.

Claims (1)

[Claims] In a communication switching device that connects a public network and a private network via a relay connection to exchange communications between terminal devices of multiple types of media, a relay in which communication between the terminal devices to be exchanged is performed via the public network and the private network. relay connection call detection means for detecting whether or not it is a connection call by analyzing a dialed number; and a terminal of a relay connection call via the public network and private network detected by the relay connection call detection means. The device is characterized by comprising a connection prohibiting means for identifying the media of the device and prohibiting connection of the relay connection call if at least one of the terminal devices is a predetermined specific medium. communications exchange equipment.