JP2000299744A - Isdn connection control unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an ISDN connection control unit that utilizes an existing communication unit and an existing technology in an ISDN service, supports addition of a number to information and a sequence of the ISDN service, controls a destination and attains freely selection of a connection destination and an extension call. SOLUTION: A control means 120 of the ISDN connection control unit is provided with an incoming number analysis means 121 that analyzes an incoming call number of a setup message associated with a call from a digital communication terminal unit 10 connected to a subordinate digital channel connection unit 20, and with an incoming number provision means 122 that provides a new incoming number to the old incoming number on the basis of number information registered in advance and uses a DSU means 140 to transmit a setup message to an ISDN exchange 30.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ISDN connection control device, and more particularly to a method of analyzing and controlling the contents of an ISDN protocol in advance and adding the information to a called number based on information of the called number in a calling operation. The present invention relates to an ISDN connection control device for enabling a calling operation and an incoming operation to an S-point / T-point connection digital communication device terminal.

[0002]

2. Description of the Related Art Conventionally, a protocol such as a call setting message in a calling operation from a digital communication equipment terminal connected to an ISDN line is transmitted as it is to an ISDN exchange via all digital line connection devices. Is done. In addition, the contents of the called number information are limited, and the unique number from the digital communication device is all subjected to the process rejected by the ISDN exchange. For this reason, in the existing system, for example, N
When a first-class communication carrier other than the TT is used, an operation of adding a special number of the first-class communication carrier selected from each digital communication device terminal at the time of calling operation is performed.

Conventionally, a device connected to the line side of a communication device used by a user to control LCR (Low Cost Routing: low-cost line selection function) is connected to an analog line and used. There are devices and devices used for ISDN lines. The one used for the ISDN line uses a main device such as a business phone connected to the ISDN line.

[0004] In addition, in the case of an extension call between digital communication equipment terminals connected to a digital line connection device using a special number or the like, the extension call is performed as communication (paid general outside line communication) via an ISDN exchange.

[0005]

However, in the above-mentioned conventional system, when a first-class communication carrier other than NTT is selected at the time of making a call, an operation of adding a special number must be performed each time. In addition, there is a problem that an extension call cannot be made between digital communication equipment terminals connected to the digital line connection device.

As described above, the conventional ISDN connection control device requires a mechanism for connecting to a target connection destination by the device even if the information is transmitted without being aware of information at the time of calling operation from the digital communication terminal. Becomes In addition, a mechanism is required that can be used for extension calls between digital communication equipment terminals free of charge using existing digital communication terminal technology as it is.

[0007] Further, in the conventional LCR, what is used on the ISDN line only uses the main device connected to the ISDN line, and is limited to calling from the extension telephone of the business phone. The present invention has been made in view of the above points, and in the ISDN service, a number is added to information and a sequence of the ISDN service is supported by using existing communication devices and technologies, a destination is controlled, and a free destination is controlled. It is an object of the present invention to provide an ISDN connection control device that enables selection of a connection destination and extension communication.

[0008]

FIG. 1 is a block diagram showing the principle of the present invention. The present invention (claim 1) provides an ISDN exchange 3
DSU means 140 connected to the ISDN subscriber line from 0 through a U-point interface, and OCU means 11 connected to the lower digital line connection equipment through a U-point interface.
0, and a control means 120 for controlling the DSU means 140 and the OCU means 110, wherein the control means 120 is a digital communication terminal connected to the lower digital line connection device 20. Equipment 1
A called number analyzing means 121 for analyzing a called number of a call setting message associated with a calling operation from 0, and a new called number is added to the called number based on the number information registered in advance.
And a called number assigning means 122 for transmitting a call setup message from the U means 140 to the ISDN exchange 30.
According to the present invention (claim 2), the called number analyzing means 121 includes special number determining means for judging a special number based on the contents of the called number, and the called number assigning means 122 receives the lower digital line via the OCU means 110. Means for sending a signal to the connection device 10 as if a call-in operation is being performed is included.

As described above, the control means analyzes the call setting message at the time of the calling operation acquired from the digital communication equipment terminal connected to the lower digital line connecting device, adds the number to the called number, and controls the special number. To enable the free selection of the connection destination. Further, the present invention supports a communication protocol, and when a special number such as an extension call between digital communication device terminals is detected from a call setting message, it is as if a general incoming call to the digital communication device via the digital line connection device. Communication is controlled by a similar process, a communication path is formed, and an extension call or the like is enabled.

[0010]

FIG. 2 shows a system configuration of the present invention. The system shown in FIG. 1 includes a digital communication equipment terminal 10 capable of making an extension call, a digital line connection device 20,
It comprises an SDN connection control device 100 and an ISDN exchange 30.

[0011] The ISDN connection control device 100
A DSU unit 110 connected to the ISDN subscriber line from the exchange via a U point interface, and an OCU unit 14 connected to a lower digital line connection device via a U point interface.
0 and the number information storage unit 13 in which the number information is registered
0, a control unit 120 for controlling the DSU unit 110 and the OCU unit 140.

It is assumed that the number information storage unit 130 registers in advance a special number selected by a first-class communication carrier other than NTT and a connection line number of the present apparatus. The control unit 120 performs a calling operation from the digital communication connection terminal 10, and when a call setup message is sent through the OCU unit 110 in the ISDN connection device 100 via the digital line connection device 20, the The number analysis unit 121 analyzes the called number information of the received call setting message. The analysis is performed by collating the called number included in the acquired call setup message with the number stored in the number information storage unit 130, thereby obtaining the number of a first-class communication carrier other than NTT or the connection line number of the device. Is determined.

The number assigning section 122 includes a called number analyzing section 121.
If it is determined in the analysis result of the called number in that a first-class communication carrier other than NTT is selected,
The “selection number + destination number” is mapped to the call setup message as new destination number information and transmitted to the ISDN exchange 30. The reverse is also true.

When the result of the analysis of the called number indicates that the called number is the connection line number of the apparatus, the number assigning section 122 provides the called digital communication terminal 10 with the called address and the digital communication equipment terminal. A call setup message is transmitted by mapping the destination subaddress as identification information. FIG. 4 is a sequence chart for explaining the outline of the operation of the present invention.

Step 101) The digital communication equipment terminal 10 on the calling side performs a calling operation. Step 102) A call setting message is transmitted to the ISDN connection control device 100 via the digital line connection device 20 by the calling operation. Step 103) OC of the ISDN connection control device 100
When control section 120 receives the call setup message via U section 110, called number analysis section 121 analyzes the called number information of the call setup message.

Step 104) On the basis of the result of the analysis by the called number analyzing section 121, if the number assigning section 122 determines that the message is a number assigned or an extension, the call setting accepting message or the call setting message , Send a response message. Step 105) In the called number analysis unit 121, NT
If it is determined that it is a type 1 communication carrier other than T, "selection number + called number" is mapped to the call setting message as called number information and transmitted to the called digital communication equipment terminal.

Step 106) When the called number analyzing section 121 determines that the called number is the connection line number of the present apparatus (extension), a call setting acceptance message is sent to the calling digital communication equipment terminal 10. Send. Step 107) The call setup message is transmitted to the digital communication device terminal 10 on the called side (called side) by mapping the called address and the called subaddress as identification information of the digital communication device terminal.

Step 108) The ISDN connection control device 100 receives a response message from the digital communication device terminal 10 on the receiving side. Step 109) Digital communication equipment terminal 1 on the calling side
A response message indicating that a response has been received from the digital communication device terminal on the receiving side is transmitted to 0.

Next, the above-mentioned ISDN connection control device 100
Will be described. FIG. 5 is a flowchart showing the operation of the IDSN connection control device of the present invention. In the following description, it is assumed that the digital communication equipment terminal on the calling side in the case of extension communication is A, and the digital communication equipment terminal on the called side is B. Step 201) OC of ISDN connection control device 100
U section 110 is connected via digital line connection device 20 to
A call setting message is received from the digital communication device terminal 10A.

Step 202) The OCU unit 110 passes the received call setting message to the called number analyzing unit 121 of the control unit 120, and the called number analyzing unit 121 analyzes the acquired call setting message. At this time, the called number is compared with the number stored in the number information storage unit 130 to determine whether the number belongs to a first-class communication carrier other than NTT or the present apparatus connection line number.

Step 203) If it belongs to a first-class telecommunications carrier other than NTT, the process proceeds to step 204; otherwise, the process proceeds to step 206. Step 204) The selected number + the called number is mapped to the call setup message as new called number information. Step 205) The call setup message to which the called number information is mapped is transmitted to the ISDN exchange 30 via the DSU unit 140.

Step 206) If the called number is the connection line number of the apparatus, it is determined that the communication is an extension communication between the digital communication equipment terminals 10. Step 207) A call setting acceptance message is transmitted to the digital communication device terminal 10A that has originated the call via the OCU unit 110. Step 208) Digital communication equipment terminal 1 on the calling side
A call message is received from OA.

Step 209) The number assigning section 122
A destination address and a destination sub-address as identification information of the digital communication device terminal 10 are mapped to a call setup message to the digital communication device terminal 10B on the called side and transmitted via the OCU unit 110. Step 210) Digital communication equipment terminal 1 on the called side
A call message is received from OB via OCU unit 110 as a response.

Step 211) A call message is transmitted to the digital communication equipment terminal 10A on the calling side via the OCU unit 110, and the digital communication equipment terminal 10B on the called side is transmitted.
When a response message is received from, the response message is returned to the calling side. At the same time, the ISDN connection control device 100
Connects the B channel and forms a communication path. Also, in the case of disconnection, when a disconnection message is received from either one, a disconnection message is also sent to the other, and transmission and reception of a release message and a release completion message are performed mutually.

Actually, both transmission and reception are performed in the same D channel. Also, with regard to the hold transfer during a call, the operation of the digital communication device terminal 10 is used to notify the ISDN exchange 30 of a communication interruption instruction by using the ISDN basic service “communication device movement service”,
Execute. Thereafter, a general calling operation is performed, and another telephone is called and an extension call for transfer is made. At the transfer destination, a restart instruction is performed using the same special number as that used in the interruption instruction of the device movement service during communication, and communication is established.

Here, an example of mapping will be described. FIG.
Shows an example of mapping by the numbering unit of the present invention.
FIG. 5A is a flowchart showing step 2 of the flowchart shown in FIG.
04 is an example of mapping in which a number dialed by a user as called number information (a) is mapped to a call setting message including a protocol identifier, a message type, a transmission capability, a keypad facility, and a call number. FIG. 9B shows an example of the mapping in step 209, in which the call is transmitted through the present apparatus, and the call setting message having the above-described configuration includes the called number information (a).
Is mapped in combination with the number dialed by the user and the number α assigned by the present apparatus.

[0027]

An embodiment of the present invention will be described with reference to FIG.
When the ISDN connection control device 100 receives the called number “123456789” as a call setting message from the digital communication device terminal 10, the called number analyzing unit 120 of the control unit 120 controls the called number and the number information storage unit 130 of the call setting message. In this case, it is determined that the user is a first-class communication carrier other than NTT.

As a result, the number assigning section 122 assigns “Ah” to the called number “12345678” as the selected special number.
9 ", and map" Ah 123456789 "to a call setup message.
The data is transmitted to the called-side digital communication equipment terminal via the SDN exchange 30. The reverse is also true. Thus, L
The route with the highest priority using the ISDN line by the CR function can be selected.

The present invention is not limited to the above-described embodiment, but can be variously modified and applied within the scope of the claims.

[0030]

As described above, according to the present invention, it is possible to freely select an electric communication path using an LCR function or the like without changing an existing communication system. Also, an extension call can be provided between digital communication equipment terminals.

[Brief description of the drawings]

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

FIG. 2 is a system configuration diagram of the present invention.

FIG. 3 is a sequence chart for explaining the outline of the operation of the present invention.

FIG. 4 is a flowchart showing the operation of the ISDN connection control device of the present invention.

FIG. 5 is an example of mapping by the numbering unit of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Digital communication equipment terminal 20 Digital line connection apparatus 30 ISDN exchange 100 ISDN connection control apparatus 110 OCU means, OCU section 120 Control means, control section 121 Called number analysis means, called number analysis section 122 Number assignment means, number assignment section 130 Number Information storage unit 140 DSU means, DSU unit

Claims (2)

[Claims] 1. DSU means connected to an ISDN subscriber line from an ISDN exchange via a U-point interface, OCU means connected to a lower-level digital line connection device via a U-point interface, and the DSU means and the OCU means Control means for controlling a call setting message received from a digital communication terminal device connected to the lower digital line connection apparatus. A called number analyzing means for analyzing a number, a new called number is given to the called number based on the number information registered in advance, and the ISDN is sent from the DSU means.
An ISDN connection control device, comprising: a destination number assigning means for transmitting a call setting message to an exchange. 2. The called number analyzing means includes a special number judging means for judging a special number according to the contents of the called number, and the called number assigning means, via the OCU means, the lower digital line connection device. 2. The ISDN connection control device according to claim 1, further comprising means for transmitting a signal as if a call reception operation is being performed.