JP2003318994A - Audio gateway device and call connecting method to be used therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an audio gateway device capable of improving expansibility and flexibility of a numbering system of audio networks. <P>SOLUTION: A VoIP call control signal is reported from a VoIP trunk card 31 through a VoIP trunk control part 32 to a VoIP call control signal analytic part 33, and call information such as caller information, callee information, and the like contained in the call control signal is analyzed and held in a call information storage part 34. An ISDN layer 3 message creating part 35 creates a call setting message from the held information, and a call originating node information mapping part 35a reads call originating node IP address information out of the call information storage part 34, contains it in the ISDN layer 3 message as call originating subaddress information and sends it from an ISDN trunk control part 36 through an ISDN trunk card 37 to an ISDN circuit switched network 200 as a call setting message. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a voice gateway device and a call connection method used therefor, and more particularly to voice communication using an intranet / extranet [hereinafter referred to as V
oIP (Voice over Internet P)
to ISDN (Integrar)
arated Services Digital Net
work: integrated digital communication network) The present invention relates to a call connection method for identifying a calling node on the circuit switching network side when a call is connected to a line.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 4, a system configuration for making an outgoing connection from a VoIP using an intranet / extranet to an ISDN line is as follows.
The originating terminals 41 to 44 are accommodated in the originating nodes 51 to 53, the originating nodes 51 to 53 are connected to the voice gateway device 61 via the intranet / extranet 300, and the voice gateway device 61 is routed via the ISDN circuit switching network 400. It is connected to the receiving terminal 45.

In FIG. 4, the calling terminal 41 is the calling node 5
No. 1 is used for VoIP transmission using the intranet / extranet 300. The call is relayed to the ISDN circuit switching network 400 via the voice gateway device 61. The ISDN circuit switching network 400 verifies the validity of the connection, and if permitted, connects to the receiving terminal 45.

Intranet / Extranet 300
In VoIP via IP, one voice gateway device 6
Outgoing connections are made from one of the plurality of originating nodes 51 to 53. In the ISDN circuit switching network 400, the source node 51
By specifying the originating terminal 41, it becomes possible to perform control such as connection regulation and billing.

Intranet / Extranet 300
In the case of voice connection from the source node 51 to the ISDN circuit switching network 400, a means for identifying the source terminal 41 and the source node 51 for VoIP is "source node station number + source terminal" when transmitting from the source node 51 to VoIP. There is a method of transmitting "number" as sender number information.

In this case, when connecting from the voice gateway device 61 to the ISDN circuit switching network 400, the caller number information sent from the VoIP side is relayed from the voice gateway device 61 to the ISDN circuit switching network 400. Then, the ISDN circuit switching network 400 can identify the calling node 51 and the calling terminal 41 based on the calling party number information, and can control the connection regulation and the charging for each calling node.

[0007]

In the above-mentioned conventional call connection method, the ISDN circuit switching network grasps all caller number information that can be transmitted from the voice gateway device to the ISDN line, and performs connection regulation and charging control. Because you need
Whenever the number of nodes or calling terminals in the voice network is increased or decreased or the number of the node or calling terminal is changed, it is necessary to change the database on the ISDN circuit switching network side each time, which impairs the scalability and flexibility of the voice network Therefore, there is a problem that the voice network environment in the intranet / extranet cannot be easily changed.

Further, in the conventional call connection method, when there are a plurality of nodes having the same station number in the intranet / extranet, the node cannot be specified, so that the station number in the intranet / extranet cannot be specified. Since it needs to be uniquely assigned, there is a problem that the voice network configuration in the intranet / extranet is restricted.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above problems and to provide a voice gateway apparatus and a call connection method used therefor which can enhance the expandability and flexibility of the number system of the voice network. .

[0010]

A voice gateway device according to the present invention uses a voice over internet (VoIP) utilizing an intranet / extranet.
et Protocol) to ISDN (Integra)
arated Services Digital Network
ork) a voice gateway device for making an outgoing connection to a circuit switching network, which includes collecting means for collecting information for identifying the VoIP originating node from a VoIP call control signal, and information for identifying the originating node. Mapping means for mapping to ISDN layer 3 messages.

A call connection method according to the present invention uses a VoIP (Voice) utilizing an intranet / extranet.
from over Internet Protocol to ISDN (Integrated Services)
Digital Network) A call connection method for a voice gateway device for making an outgoing connection to a circuit switching network, the method comprising: collecting information for identifying a VoIP calling node from a VoIP call control signal; and specifying the calling node. Information for mapping to ISDN layer 3 messages.

That is, the voice gateway device of the present invention is a VoI using an intranet / extranet.
P (Voice over Internet Pro)
trunk circuit accommodating tocol) and ISDN (I
ntegrated Services Digital
PBX (Private Brat) including a trunk circuit accommodating an l Network line and performing connection control
nch eXchange: a private telephone network switch), a node for transmitting VoIP to a voice network using an intranet / extranet, and an ISDN circuit switched network, in a network having an ISDN circuit switched network, an ISDN circuit switched network via VoIP using an intranet / extranet. When making a connection to the PBX, the PBX collects the IP address information of the VoIP source node from the VoIP call control signal and uses the notified IP address information of the source node as the ISDN layer 3
Map it on a message and send it to the ISDN line,
The ISDN circuit-switched network extracts the IP address information of the source node mapped to the ISDN layer 3 message, thereby making it possible to specify the VoIP source node in the ISDN circuit-switched network.

As a result, the VoI can be used by using the intranet / extranet without using the caller number information.
By notifying the ISDN circuit switching network of the calling node information for making the P call, it becomes possible to specify the calling node regardless of the telephone number system of the voice network in the intranet / extranet.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing the configuration of a network according to an embodiment of the present invention. In FIG. 1, a network according to an embodiment of the present invention is a calling terminal 1
, The originating node 2, the intranet / extranet 100, the voice gateway device 3, the ISDN (In
integrated Services Digital
The network comprises a circuit switching network 200 and a destination terminal 4.

The calling terminal 1 is accommodated in the calling node 2, and the calling node 2 is connected to the intranet / extranet 100.

The voice gateway device 3 uses the intranet / extranet 100 for voice communication [hereinafter,
VoIP (Voice over Internet)
Protocol]] to ISDN circuit switching network 2
PBX (Private Bra)
nch eXchange: a private telephone network switch).

Further, the voice gateway device 3 includes a VoIP trunk card 31 accommodating the intranet / extranet 100, a VoIP trunk control unit 32 for controlling communication with the VoIP trunk card 31, and a VoIP.
VoIP call control signal analyzer 33 for analyzing a call control signal
A call information storage unit 34, an ISDN layer 3 message generation unit 35 that generates an ISDN layer 3 message,
It is composed of an ISDN trunk control unit 36 and an ISDN trunk card 37.

Further, the ISDN layer 3 message generation section 35 uses a source node IP (Internet Protocol).
ol) The originating node mapping unit 35a for mapping the address information to the ISDN layer 3 message is provided. The ISDN trunk card 37 is connected to the destination terminal 4 via the ISDN circuit switching network 200.

First, when a call is made from the calling terminal 1 to the called terminal 4, the call is received by the VoIP trunk card 31 using the intranet / extranet 100. The VoIP call control signal indicating an incoming call is a VoIP trunk card 31.
Is notified to the VoIP call control signal analysis unit 33 via the VoIP trunk control unit 32, call information such as caller information and callee information included in the call control signal is analyzed, and the call information is held in the call information storage unit 34. It

The ISDN layer 3 message generator 35 generates a call setup message from the held information. The calling node information mapping unit 35a reads the calling node IP address information from the call information storage unit 34 and calls the calling subaddress information. Is included in the ISDN layer 3 message as
ISDN circuit switching network 20 sent to the trunk card 37
It is sent to 0 as a call setup message.

FIG. 2 is a flowchart showing the operation of the voice gateway device 3 of FIG. 1, and FIG. 3 is a diagram showing an example of the calling subaddress information element showing the calling node IP address information in one embodiment of the present invention. The operation of the embodiment of the present invention will be described with reference to FIGS.

The calling terminal 1 accommodated in the calling node 2 makes a call to the called terminal 4 using the intranet / extranet 100. In this case, VoIP indicating the origination of the call
The call control signal includes caller number information, callee number information, source node IP address information, destination node IP address information, etc. This VoIP call control signal is sent to the VoIP trunk controller 32 by the VoIP trunk card 31. It is notified to the VoIP call control signal analysis unit 33 via the.

The VoIP call control signal analysis unit 33 is a VoIP
When waiting for the reception of the call control signal and receiving the VoIP call control signal (step S1 in FIG. 2), the content of the call control signal is analyzed (step S2 in FIG. 2) and stored in the call information storage unit 34 for each call information. (Step S3 in FIG. 2).

The ISDN layer 3 message generation section 35 reads out the calling number information, the called number information and the like from the call information storage section 34 and generates a call setting message for the ISDN line (step S4 in FIG. 2). At that time, the source node information mapping unit 35a is activated to read the IP address information of the source node from the call information storage unit 34 (step S5 in FIG. 2).
If the reading is successful (step S6 in FIG. 2), the source node information mapping unit 35a maps it in the call setup message as a source subaddress information element (step S in FIG. 2).
7).

FIG. 3 shows an example of the source subaddress information element indicating the source node IP address information. In FIG. 3, the source subaddress information element includes a source subaddress information element identifier (6Dh), an information element length (05h), a subaddress type (user specific), and mapped IP address information 301. In FIG. 3, the mapped IP address information 301 is “172.1.
6.253.1 ”.

The ISDN call setup message generated by the ISDN layer 3 message generation section 35 is transmitted to the ISDN trunk control section 36 (step S8 in FIG. 2), and IS
ISDN circuit switching network 1 by DN trunk card 37
Sent to 00.

As a result, in the voice gateway device 3, by transmitting the IP address information of the calling node as the calling subaddress information to the ISDN circuit switching network 200 in this way, the calling number information is not restricted, and the voice calling It is possible to identify the originating node based on the IP address information on the ISDN circuit switching network 200 side regardless of the network number system.

As described above, in this embodiment, the IP address information of the calling node 2 is mapped to the calling sub address without using the calling number information for identifying the calling node 2 that sends the VoIP to the intranet / extranet 100. Since it does not affect the station number and the terminal number of the node, the expandability and flexibility of the number system of the voice network are enhanced.

Further, in this embodiment, the IP address information of the source node 2 to the intranet / extranet 100 is notified to the ISDN circuit switching network 200 and the node is specified, so that a plurality of IP interfaces are provided for one node. When included, each IP address information is notified, so that when one node has a plurality of IP interfaces, it is possible to individually specify the IP interfaces.

Further, in the present embodiment, in the ISDN circuit switching network 200, the IP address information of the calling node 2 to the intranet / extranet 100 can be treated as the conventional number information called the calling sub address, so that connection restriction, billing, etc. can be performed conventionally. The control can be easily applied.

[0031]

As described above, according to the present invention, VoIP to IS using an intranet / extranet is used.
In a voice gateway device for making an outgoing connection to a DN circuit switching network, information for identifying a VoIP originating node is collected from a VoIP call control signal, and information for identifying the originating node is mapped to an ISDN layer 3 message. As a result, it is possible to increase the expandability and flexibility of the number system of the voice network.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of a network according to an embodiment of the present invention.

FIG. 2 is a flowchart showing an operation of the voice gateway device shown in FIG.

FIG. 3 is a diagram showing an example of a source sub-address information element indicating source node IP address information according to an embodiment of the present invention.

FIG. 4 is a block diagram showing a configuration of a network according to a conventional example.

[Explanation of symbols]

1 originating terminal 2 originating node 3 Voice gateway device 4 destination terminal 31,37 VoIP trunk card 32,36 VoIP trunk control unit 33 VoIP call control signal analysis unit 34 Call information storage unit 35 ISDN Layer 3 Message Generator 35a Source node mapping unit 100 Intranet / Extranet 200 ISDN circuit switching network 301 Mapped IP address information

   ─────────────────────────────────────────────────── ─── Continued front page    F term (reference) 5K030 HB01 HC05 HC13 HD03 HD06                       JA13 KA16 LB01                 5K049 AA06 BB02 BB04 BB23 CC00                       EE11 FF32                 5K051 BB01 CC02 CC04 DD03 DD13                       GG03 HH01 HH19

Claims (8)

[Claims] 1. A VoIP (Voice over Internet) using an intranet / extranet.
et Protocol) to ISDN (Integra)
arated Services Digital Net
work) A voice gateway device for making an outgoing connection to a circuit switching network, which includes collecting means for collecting information for identifying the VoIP originating node from a VoIP call control signal, and information for identifying the originating node. And a mapping means for mapping to an ISDN layer 3 message. 2. A PB including a trunk circuit for the VoIP and a trunk circuit for connecting the ISDN circuit switching network.
X (Private Branch eXchange)
The voice gateway device according to claim 1, wherein the voice gateway device comprises e). 3. The collecting means includes an IP (Internet) of the source node included in the VoIP call control signal.
The voice gateway device according to claim 1 or 2, wherein address information is collected as information for identifying the source node. 4. The mapping means maps the information for identifying the source node to a source subaddress information element which is the ISDN layer 3 message, according to any one of claims 1 to 3. Voice gateway device. 5. A VoIP (Voice over Intern) using an intranet / extranet.
et Protocol) to ISDN (Integra)
arated Services Digital Net
work) A call connection method of a voice gateway device for making an outgoing connection to a circuit switching network, the method comprising: collecting information for identifying the originating node of VoIP from a VoIP call control signal; and identifying the originating node. And the information of the above is mapped to an ISDN layer 3 message. 6. The voice gateway device is configured to control the Vo.
A PBX (Private B) including a trunk circuit for IP and a trunk circuit for connecting the ISDN circuit switching network.
6. The call connection method according to claim 5, wherein the call connection method comprises a branch eXchange). 7. The step of collecting information for identifying the source node includes the IP (Internet Protocol) of the source node included in the VoIP call control signal.
7. The call connection method according to claim 5 or 6, wherein the address information is collected as information for identifying the originating node. 8. The step of mapping the information for identifying the source node maps the information for identifying the source node to a source subaddress information element that is the ISDN layer 3 message. The call connection method according to any one of claims 5 to 7.