JPH08251289A - Extension connection method and system device from domestic virtual exclusive network to international virtual exclusive network - Google Patents

Abstract

PURPOSE: To provide an extension connection method/system device between a domestic virtual exclusive network and an international virtual exclusive network in order to perform the international communication by means of an international domestic VPN extension number or a proper VPN extension number regardless of an on-net or off-net state. CONSTITUTION: A domestic network service control station 4 receives an international VPN extension number from a domestic VPN contract subscriber A and then retrieves a prefix corresponding to the international VPN extension number out of an international extension connection data table 14. Then the station 4 instructs a domestic subscriber exchange 1 to connect a domestic virtual exclusive network to an international communication network β by means of an international routing number including the corresponding prefix added to the international VPN extension number.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides a domestic and foreign public telecommunication network, a radio communication network or an optical communication network for improving the service convenience of a virtual private network (also called a virtual private network, VPN). The present invention relates to a method of connecting an extension from a virtual private network to an international virtual private network and a system device used directly for implementing the extension.

[0002]

2. Description of the Related Art In a virtual private network (VPN) communication service system using a public telecommunication network, a VPN extension number (a VPN subscriber I that works in a group of subscribers of the same VPN) is used.
In D), call connection within the same members net group is possible. This is the VP specified and registered by the user
This is realized by translating the N extension number into a general telephone number (general subscriber ID) at the network service control station and then connecting the public telecommunications network to the called subscriber at the general telephone number.

In this type of communication service system, the calling subscriber and the called subscriber are connected in the public telecommunications network by the following procedure. First, when a VPN contract subscriber dials a VPN extension number, for example, "233", the general subscriber ID (telephone number) and the VPN extension number "233" are sent to the network service control station via the common line signaling network. Sent. The network service control station identifies the group (subscriber group) of the virtual private network from the general subscriber ID, and also receives the VPN extension number "233" as the incoming general subscriber ID.
Translate to (phone number). Then, the general subscriber ID of the called subscriber is used as the routing number, the calling subscriber exchange is connected to the called subscriber exchange using the public telecommunication network, and the calling subscriber and the recipient subscriber are connected. The connection with the person responsible.

Therefore, in the communication service system, by using the public telecommunications network among the business offices within the same company dispersed all over the country, the call service by the extension number can be provided as in the case of using the leased line. It becomes possible (the title of the invention "wide-area subscriber group service realization method"; see Japanese Patent Laid-Open No. 4-319844). Therefore, this type of communication service method has an advantage that the registered extension number can be used as it is even if the base is moved.

Next, with reference to the drawings, a method of connecting an extension to an international virtual private network and a system device in a general domestic virtual private network will be specifically described. FIG. 8 is also a sequence example when making a call (communication) from a domestic VPN contract subscriber (sender) A to an international VPN contract subscriber (receiver) E using the extension connection function of the domestic virtual private network. Reference numeral 9 indicates each of the system devices.

First, when the domestic VPN contract subscriber A, who is the calling party, hooks the terminal off-hook, the domestic VPN contract subscriber A
The domestic exchange 1 on the side detects the off-hook.
Next, the domestic subscriber exchange 1 searches the VPN subscriber check table to determine whether the domestic VPN contract subscriber A is a contractor of the domestic virtual private network connected to the domestic public telecommunications network α. As a result of the determination, when it is confirmed that the subscriber is a domestic VPN subscriber, the domestic subscriber exchange 1 sends an identification dial tone (second dial tone) to the domestic subscriber A.

After receiving the identification dial tone, the domestic VPN subscriber A dials "0" which is a communication identification signal to the international communication network β. Domestic VPN contract subscriber A
When receiving the dial signal of the number "0", the domestic subscriber exchange 1 determines that the call is outside the domestic virtual private network, and sends a normal dial tone to the domestic VPN subscriber A.

The domestic VPN contract subscriber A is a prefix which is a communication identification signal to the international communication network β of the international communication carrier with which the international VPN contract subscriber E has an international VPN contract,
For example, "00ABC" and its international extension number, such as "J
Dial "KNM".

The domestic subscriber exchange 1 of the domestic VPN contract subscriber A uses the prefix and the international extension "00ABC +
When the dial signal "JKNM" is received, it is determined that the connection request is to the international VPN. The caller's domestic general subscriber ID (telephone number) "03-3XXXXX- ○○○○" and an international extension number "00ABC +" prefixed
JKNM ”is transmitted to the domestic network service control station (SCP) 4 via the common line signaling network 3.

At the domestic network service control station 4, from the domestic subscriber exchange 1 to the general subscriber I of the domestic VPN contract subscriber A.
When D and the international extension number to which the prefix is added are received, first, the member group of the domestic virtual private network to which the domestic VPN contract subscriber A belongs is determined by the general subscriber ID, and the domestic VPN contract subscriber is also the domestic VPN contract subscriber. Make sure that.

Next, from the international extension number "00ABC + JKNM" to which the prefix is added, for example, "JKN
If "M" is used as the identification data of the international VPN, the number is identified as a request for connection to the international VPN, and this number is used as a physical number for connection to the domestic subscriber exchange 1 of the domestic VPN contract subscriber A. It is transmitted via the common line signal network 3.

The domestic subscriber switch 1 of the domestic VPN contract subscriber A assigns the international routing number "00ABC + JKNM" from the domestic network service control station 4 to the connected international VPN contract subscriber D via the common line signaling network 3. When received, it sends an address signal (IAM) to send domestic public telecommunications network α
Through the route, the domestic relay exchange 5 and the domestic gateway exchange 6 are instructed to connect to the international communication network β to which the international VPN contract subscriber E belongs via the border interconnection point 7. Then, it is connected to the international subscriber exchange 2 via the international gateway exchange 8 and the international transit exchange 9 of the international communication network β, and predetermined routing processing is performed, and the domestic VPN / contract subscriber A and the international VPN / contract subscriber E are connected. The connection is processed.

[0013]

By the way, it is desired that a contract subscriber who receives the communication service of the virtual private network communicates with a predetermined extension number without being aware of the domestic public telecommunication network α and the international communication network β. Request. However, the conventional virtual private network communication service system does not have a connection function that satisfies such a demand.

Therefore, as described in the above-mentioned prior art, in making an international call, it is necessary to dial the prefix number and the international VPN extension number by the off-net calling procedure, so that the calling procedure becomes complicated. is there. In addition, there is a problem in that the complexity of such a calling procedure is an obstacle to the progress of the private number plan.

The main objects to be solved by the present invention are as follows. A first object of the present invention is to switch from a domestic virtual private network to an international virtual private network capable of performing international communication with an international extension number or a unique extension number regardless of whether it is on-net or off-net. An extension connection method and system device are provided.

A second object of the present invention is to provide a method and system unit for connecting an extension to an international virtual private network in a domestic virtual private network which enables international calls without dialing a prefix number. is there.

A third object of the present invention is to provide a method and system unit for connecting an extension to an international virtual private network in a domestic virtual private network which can sufficiently proceed with a private number plan.

Other objects of the present invention include the specification, drawings,
In particular, it will be apparent from the description of the claims.

[0019]

[Means for Solving the Problems] To solve the above-mentioned problems,
The present invention achieves the above object by adopting the novel characteristic construction methods and means listed below.

That is, the first feature of the method of the present invention is that, for a specific international subscriber group connected to a domestic public communication network including a domestic subscriber exchange, a domestic virtual private network (VP) is used.
From N), when controlling the domestic subscriber exchange through the common line signaling network and performing the extension connection processing to the international VPN, the international VPN extension number for each VPN and the identification number for the connection of the international communication network to which the relevant international VPN extension number belongs The database for international extension connection for each VPN corresponding to (prefix) is prepared in advance, and the international VPN from the domestic VPN subscriber is stored.
When the extension number is received through the common line signaling network, the database for international extension connection is searched for a prefix corresponding to the international VPN extension number, and the prefix is added to the international VPN extension number for the domestic subscriber exchange. Instructs through the common line signaling network to connect to the international virtual private network in the international communication network with the added international routing number, and establishes a communication path passing through the border interconnection point on the way to the domestic public communication network and the international communication network. This is a method of connecting an extension from a domestic virtual private network to an international virtual private network, which is formed in a series and is connected to an international VPN subscriber.

The second feature of the method of the present invention is that from a domestic virtual private network (VPN) to a common line signaling network for a specific international subscriber group connected to a domestic public communication network including a domestic subscriber exchange. To control the domestic subscriber exchange through
When processing an extension connection to a PN, a database for international extension connection with a unique extension number that associates a unique extension number unique to the domestic subscriber group of the domestic VPN and an international routing number with a prefix added to the international VPN extension number for each VPN Is prepared in advance, and when a unique extension number from a domestic VPN subscriber is received through the common line signaling network, an international routing number corresponding to the unique extension number is stored in the international extension connection database with the unique extension number. Search and instruct through the common line signaling network to connect to the international virtual private network in the international communication network by the routing number, cross the domestic public communication network and the international communication network, and cross the border interconnection point on the way. A virtual virtual network from a domestic virtual private network that is formed by connecting a series of communication channels to connect to international VPN subscribers. In the extension how to connect to the private network.

A third feature of the method of the present invention is that the unique extension number in the second feature of the method of the present invention is a dial number having a number of digits shorter than a normal call dial number from a domestic virtual private network. There is an extension connection method to the international virtual private network.

A fourth feature of the method of the present invention is that the communication path in the first, second or third feature of the present invention sequentially and consistently passes through a domestic communication path, a border interconnection point and an international communication path. It is a method of connecting an extension from a domestic virtual private network to an international virtual private network.

A fifth feature of the method of the present invention is that the domestic public communication network and the international communication network according to the first, second, third or fourth feature of the present invention use a communication medium of electricity, radio waves or light. There is an extension connection method from the domestic virtual private network to the international virtual private network.

A sixth characteristic of the method of the present invention is that the common line signal network according to the first, second, third, fourth or fifth characteristic of the method of the present invention transmits electric, radio wave or light as a signal medium. The extension connection method from the virtual private network to the international virtual private network is as follows.

The first feature of the device of the present invention is to switch from a domestic virtual private network (VPN) to an international VPN for a specific international subscriber group connected to a domestic public communication network including a domestic subscriber exchange. A domestic network service control station for controlling extension connection through a common line signaling network is provided, and a subscriber check table for checking whether or not the calling subscriber is a subscriber of a domestic VPN subscriber group in the domestic subscriber exchange. When,
The domestic network service control station is provided with a sap unit for transmitting and receiving control signals to and from the domestic network service control station, and the domestic network service control station searches for which domestic VPN subscriber group the calling subscriber belongs to. Table and International VP by VPN
An international extension connection data table for each VPN in which an N extension number and an identification number (prefix) for connection of the international communication network to which the international VPN extension number belongs are associated with each other, and a control signal is transmitted and received between the SUP portion. From the domestic virtual private network to the international virtual private network, which is configured to freely form a series of communication paths passing through border interconnection points on the way to the domestic public communication network and the international communication network. In the extension connection system equipment.

The second characteristic of the device of the present invention is that from a domestic virtual private network (VPN) to an international VPN for a specific international subscriber group connected to a domestic public communication network including a domestic subscriber exchange. A domestic network service control station for controlling extension connection through a common line signaling network is provided, and a subscriber check table for checking whether or not the calling subscriber is a subscriber of a domestic VPN subscriber group in the domestic subscriber exchange. When,
A search table which searches the network service control station to which VPN subscriber group the calling subscriber belongs to; and a sap unit for transmitting and receiving control signals to and from the network service control station. Between the data table for international extension connection with a unique extension number in which the unique extension number unique to the domestic subscriber group of the VPN and the international routing number obtained by adding a prefix to the international VPN extension number for each VPN are associated with the SUP section. And a control unit for transmitting and receiving control signals in the domestic virtual private network, which is configured to freely form a series of international communication paths that pass through border interconnection points midway between the domestic public communication network and the international communication network. It is located in the extension connection system equipment from the to the international virtual private network.

A third feature of the device of the present invention is that the unique extension number in the second feature of the device of the present invention is from a domestic virtual private network in which the unique extension number is a dial number having a number of digits shorter than a normal call dial number. It is located in the extension connection system equipment to the international virtual private network.

A fourth feature of the device of the present invention is that the subscriber check table in the first, second or third feature of the device of the present invention is a domestic general subscriber ID / domestic VPN subscriber comparison table. It is in the extension connection system device from the domestic virtual private network to the international virtual private network.

A fifth feature of the device of the present invention is that the search table in the first, second, third or fourth feature of the device of the present invention is a domestic general subscriber ID / domestic group number comparison table. It is in the extension connection system device from the domestic virtual private network to the international virtual private network.

A sixth feature of the device of the present invention is that the data table for VPN-based international extension connection in the first, fourth or fifth feature of the device of the present invention is an international extension number / prefix comparison conversion table. It is in the extension connection system device from the domestic virtual private network to the international virtual private network.

A seventh feature of the device of the present invention is that the international extension connection-like data table with the unique extension number in the second, third, fourth, fifth or sixth feature of the device of the present invention,
It is in the extension connection system device from the domestic virtual private network to the international virtual private network, which is a unique extension number / prefix + international extension number comparison conversion table.

An eighth feature of the device of the present invention is that the communication path in the first, second, third, fourth, fifth, sixth or seventh feature of the device of the present invention is a border interconnection point. It is an extension connection system device from a domestic virtual private network consisting of a domestic communication path and an international communication path which mediate the above.

A ninth feature of the device of the present invention is that the domestic communication channel in the eighth feature of the device of the present invention is a domestic virtual private use consisting of a domestic subscriber exchange and, if necessary, a domestic transit exchange and a domestic gateway exchange. It is in the extension connection system equipment from the network to the international virtual private network.

The tenth feature of the device of the present invention is that the international communication channel in the eighth or ninth feature of the device of the present invention is
It is an extension connection system device from a domestic virtual private network to an international virtual private network, which consists of an international subscriber exchange and, if necessary, an international transit exchange and an international gateway exchange.

The eleventh feature of the device of the present invention is that the first, second, third, fourth, fifth, sixth, seventh, eighth, ninth, tenth or eleventh of the device of the present invention. The public communication network and the international communication network in the above feature are an extension connection system device from a domestic virtual private network to an international virtual private network using electricity, radio waves or light as a communication medium.

The twelfth feature of the device of the present invention is that the first, second, third, fourth, fifth, sixth, seventh, eighth, ninth, tenth, and eleventh parts of the device of the present invention. Alternatively, the common line signaling network according to the twelfth feature is an extension connection system device from a domestic virtual dedicated network that uses electricity, radio waves, or light as a signal medium to an international virtual dedicated network.

[0038]

The present invention takes the following actions because it takes the novel method and means as described above.

In the present invention, since the domestic network service control station 4 (net control system) of the domestic virtual private network connects to the international virtual private network in the on-net state, whether it is on-net or off-net. It is possible to make an international communication with an international extension number or a unique extension number without being aware of it. Therefore,
Since the international VPN can be treated as an extension within the domestic VPN, the private number plan can be sufficiently advanced.

According to the present invention, if the international VPN extension number or the unique extension number is dialed without dialing the prefix number, the prefix number + the international VPN extension number can be obtained in the domestic network service control station 4 (net control system). An instruction to connect to the international communication network β is given as an international routing number.

The domestic network service control station 4 in the device of the present invention acquires information indicating that the communication is from the VPN contract subscriber to the international VPN contract subscriber during the transmission processing as the management information on the network side. You can Such management information can be used, for example, for line blockage, traffic condition management, and billing processing.

[0042]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in more detail with reference to the accompanying drawing 1 on the basis of an apparatus example and a method example thereof.

In the example of the apparatus and the example of the method, the terminal is composed of a general telephone, but the terminal is not limited to this, and for example, one or two of a wire telephone, a wireless telephone, a facsimile machine or a personal computer. It may be constituted by a general terminal including the above-mentioned devices or an extension terminal of the private branch exchange PBX. Further, in the present apparatus example and method example, the domestic public telecommunications network, common line signaling network and international communications network in which electricity is used as a communication medium and a signal medium are exclusively used. However, the present invention can also be realized by using domestic and overseas radio wave communication networks, optical communication networks and common line signal networks in which radio waves or light are used as communication media and signal media.

(Device Example) FIG. 1 shows a schematic structure of a domestic virtual private network, and FIG. 2 shows a main part structure of this device example. The same parts as those of the conventional system device shown in FIG. 9 are designated by the same reference numerals to avoid duplication of description.

Domestic subscribers A to D of the domestic public telecommunications network α
Each domestic terminal has a domestic general subscriber ID (national number)
Is set, among them, domestic VPN subscribers A to C of the domestic virtual private network (VPN) ε further have domestic VPN subscriber IDs that are valid between the member groups MG of the same domestic VPN.
(Extension number) is set. The domestic VPN contract subscribers A to C are provided with various communication services of domestic VPN.

Therefore, between domestic subscribers A to D of the domestic public telecommunications network α, domestic general subscriber IDs (national numbers)
Domestic VPN of domestic VPNε
Domestic VPN subscriber IDs between PN subscribers A to C
You can connect to each other by (extension number).

The domestic VPN subscribers A to C use the data table for VPN / international extension connection in the domestic network service control station 4 to identify the international VPN extension number for each VPN and the relevant international VPN.
Border interconnection point 7 of the international communication network β to which the PN extension number belongs
By registering the connection identification number (prefix) that passes through, it becomes possible to make an international call only by the international extension number without dialing the prefix number.

The example of the present apparatus, as shown in FIG. 2 and FIG.
A domestic subscriber exchange 1 connected to a subscriber terminal A ′ such as a domestic VPNε subscriber A, a domestic VPNε subscriber A, B, C via a common line signaling network 3 and a domestic subscriber exchange 1. Domestic network service control station 4 which provides services of domestic virtual private network ε, domestic subscriber exchange 1 through domestic relay exchange 5 of domestic public telecommunications network α, and international gateway exchange of international communications network β via domestic gateway exchange 6 8, international relay exchange 9,
It is configured to sequentially and consistently connect to the international subscriber exchange 2.

At this time, the domestic communication path 1 passing through the border interconnection point 7 over the domestic public telecommunication network α and the international communication network β
0a and the international communication path 10b form a series of communication paths 10. As shown in FIG. 2, the domestic subscriber exchange 1 includes a SUP portion (abbreviation of Service Access Point) 11 and a domestic general subscriber ID / domestic VPN user contractor comparison table 13.
Is provided.

The sup section 11 is the domestic network service control station 4
Functions as a device for exchanging control signals S1 and S2 for inquiring about the connection destination. Domestic general subscriber ID / domestic VPN subscriber comparison table 12 shows that the sender is a domestic VPN
There is a function as a subscriber check table for checking whether or not the user is a user contractor, and a function for newly registering or deregistering data as necessary.

The domestic network service control station 4 functions as a network control node (called SCP or NSP) in the intelligent network (for example, published by the Institute of Electronics, Information and Communication Engineers, "Information Network Handbook", October 1992). "Chapter 3 Basic Information Network Technology"
See "3.3 Intelligent Network").

In the domestic network service control station 4 of this device example,
Further, a domestic general subscriber ID / domestic group number comparison table 12 is provided for each VPN by associating the international VPN extension number for each VPN with the connection identification number (prefix) of the international communication network β to which the international VPN extension number belongs. An international extension connection data table 14 and a control unit 15 for exchanging control signals S1 and S2 with the SUP unit 11 are provided.

Here, FIG. 4 shows an example of contents stored in the general subscriber ID / group number comparison table 8, and FIG. 5 shows an example of contents stored in the VPN / international extension connection data table 9. There is.

The domestic general subscriber ID / domestic group number comparison table 13 shown in FIG. 3 functions as a database search table for searching which member net MG the domestic subscriber belongs to. By VPN
The international extension connection data table 14 functions as a database conversion table that compares the international VPN extension number for each VPN with the connection identification number (prefix) of the international communication network β to which the international VPN extension number belongs. Data table 1 for international extension connection with unique extension number in Figure 5
Reference numeral 6 functions as a database conversion table for comparing the prefix + international extension number from the VPN unique extension number, and replaces the VPN-specific / international extension connection data table 14.

Control unit 15 of domestic network service control station 13
When an inquiry is made from the domestic subscriber exchange 1 to a connection to an international VPN contract subscriber, the data table 14 for VPN / international extension connection is searched for a prefix corresponding to the international VPN extension number. And international V
An international routing number is created by adding the prefix to the PN extension number, and in the domestic public telecommunications network α, the domestic subscriber switch 1 connects to the domestic gateway switch 6 via the domestic relay switch 5 with the routing number. Instruct them to do so.

(Method Examples) Two method examples of the extension connection method to the international virtual private network in the domestic virtual private network using the above-described apparatus example will be specifically described with reference to the drawings.

[Method example 1] FIG. 6 shows a domestic virtual private network ε from a domestic VPN / contract subscriber A to an international VPN / contract subscriber E.
The example of a sequence at the time of communicating using the extension connection function of is shown.

First, when the terminal A'of the subscriber A who is the sender is off-hook, the sup section 11 of the domestic subscriber switch 1 of the domestic VPN subscriber A goes off-hook by the domestic VPN subscriber A by the DC loop detection method or the like. Is detected, and the domestic general subscriber ID / domestic VPN subscriber comparison table 12 is searched and referenced to identify whether or not the domestic VPN subscriber A is a subscriber of the domestic virtual private network ε.

When confirming that the domestic VPN subscriber A is a contractor based on the domestic general subscriber ID of the domestic VPN subscriber A, the domestic subscriber exchange 1 sends the identification dial tone (second dial tone) to the terminal A of the domestic VPN subscriber A. ’ Subsequently, when the domestic VPN subscriber A dials the international VPN extension number "AB11" of the international VPN / contracting subscriber E at the terminal A ', the domestic VPN subscriber A's domestic subscriber exchange 1 sap section 6 To receive.

The sup section 11 of the domestic subscriber exchange 1 is
When the dial signal of "AB11" is received, it is discriminated as an international VPN extension number by identifying the number of digits, etc., and the domestic general subscriber ID (national number) of the domestic VPN subscriber A (03-3xx)
“× − ◯◯◯◯” and the international VPN extension number “AB11” are transmitted to the control unit 15 of the domestic network service control station 4 by the inquiry control signal S1 via the common line signal network 3.

The control unit 15 of the domestic network service control station 4 is
First, from the sup section 11 of the domestic subscriber exchange 1 to the domestic VP
When the domestic general subscriber ID of N subscriber A and the international VPN extension number are received, the domestic general subscriber ID “03-3 ×××”
Domestic general subscriber ID / domestic group number comparison table 13 (Fig. 3) of the same VPN identified by "-○○○○"
To check which group of domestic virtual private network ε the domestic VPN subscriber A belongs to. In this example,
It can be seen from the table 13 in FIG. 3 that the domestic VPN subscriber A is a member of the domestic group 2.

The control unit 15 of the domestic network service control station 4 is
Next, data table for VPN / international extension connection 14
(See Fig. 4) The relevant international VPN extension number "AB11"
The prefix "00ABC" corresponding to is searched.
Then, in order to respond to the inquiry, the international routing number "0" in which the prefix is added to the international VPN extension number
0ABC + AB11 ”is created. Then, the created international routing number is sent to the SUP unit 11 of the domestic subscriber switch 1 of the domestic VPN subscriber A through the common line signaling network 3.

Domestic subscriber exchange 1 of domestic VPN subscriber A
Is a control unit 1 of the domestic network service control station 4.
When the control signal S2 of "00ABC + AB11" from 5 is received, the international routing number "00ABC + AB1" is received.
1 ”international address signal (IAM) is transmitted, and if necessary, to the domestic gateway switch 6 via the domestic relay switch 5, the international gateway switch 8 of the international communication network β, the international relay switch 9 if necessary, and the international subscription. International VP via integrated switch 2
N-Instructs the contracting subscriber E to perform connection processing. In accordance with the instruction, the communication line 10 including the domestic communication line 10a and the international communication line 11b passing through the border interconnection point 7 across the domestic public telecommunication network α and the international communication network β is connected.

After that, by the processing of the international communication network β side,
The international subscriber exchange 2 sends a ringing tone for calling the international VPN / contracting subscriber E, and the international VPN / contracting subscriber E
When the terminal E'of the terminal responds by going off-hook, a response signal (ANM) is sent to the domestic subscriber exchange 1. As a result, domestic VPN, terminal A'of subscriber A and international VPN
・ The terminal E'of the contracted subscriber E is connected and the call is ready.

[Method example 2] FIG. 7 shows a domestic virtual private network ε from a domestic VPN / contract subscriber A to an international VPN / contract subscriber E.
The example of a sequence at the time of communicating using the extension connection function of is shown.

In this example of the method, the VP shown in FIG. 5 is used instead of the data table 14 for VPN / international extension connection.
Unique VPN extension and VPN unique to N domestic subscriber groups
A data table for connecting an international extension with a unique extension (hereinafter referred to as a "data table for connecting an international extension with a unique extension") 16 in which a different international VPN extension number and an international routing number with a prefix are associated with each other is provided. .

First, when the terminal A'of the domestic VPN subscriber A who is the originator goes off-hook, the sup section 11 of the domestic VPN subscriber A's domestic subscriber switch 1 uses the DC loop detection method or the like to detect the domestic VPN subscriber A. Off-hook detection of domestic general subscriber ID / domestic VPN user contractor comparison table 1
It is determined whether or not the domestic VPN subscriber A is a subscriber of the virtual private network ε by searching and referring to 2.

Upon confirming that the domestic VPN subscriber A is a contractor based on the domestic general subscriber ID of the domestic VPN subscriber A, the domestic subscriber exchange 1 sends the identification dial tone (second dial tone) to the terminal A of the domestic VPN subscriber A. ’ Subsequently, the domestic VPN subscriber A uses the terminal A ′ to obtain a unique VPN extension number (changeable and settable by the domestic VPN subscriber A) “2011”
Is dialed, the sup section 11 of the domestic subscriber switch 1 of the domestic VPN subscriber A receives this.

The sup section 11 of the domestic subscriber exchange 1 is
When the "2011" dial signal is received, it is determined as the unique extension number of the domestic VPN by identifying the number of digits, etc., and the domestic VP
Domestic subscriber ID of N subscriber A (national number) "03-
3 ××× − ○○○○ ”and the unique VPN extension number“ 201
1 ”through the common line signal network 3 for inquiry control signal S1
Is transmitted to the control unit 15 of the domestic network service control station 4.

The control unit 15 of the domestic network service control station 4 is
First, from the sup section 11 of the domestic subscriber exchange 1 to the domestic VP
When the domestic general subscriber ID of N subscriber A and the unique VPN extension number are received, the domestic general subscriber ID “03-3 ×××”
Domestic general subscriber ID / domestic group number comparison table 13 (Fig. 3) of the same VPN identified by "-○○○○"
To check which group of the domestic VPN subscriber A belongs to the virtual private network ε. In this example, FIG.
It can be seen from Table 13 that the domestic VPN subscriber A is a member of domestic group 2.

The control unit 15 of the domestic network service control station 4 is
Next, the international VPN extension number “0” to which the prefix corresponding to the specific VPN extension number “2011” is added in the international extension connection data table 16 with the unique extension number
Search for "0ABC + AB11". Then, this number is sent as an international routing number to the SUP unit 11 of the domestic subscriber switch 1 of the domestic VPN subscriber A through the common line signaling network 3.

Domestic subscriber exchange 1 of domestic VPN subscriber A
Is a control unit 1 of the domestic network service control station 4.
When the control signal S2 of "00ABC + AB11" from 5 is received, the international routing number "00ABC + AB1" is received.
1 ”international address signal (IAM) is transmitted, and if necessary, to the domestic gateway switch 6 via the domestic relay switch 5, the international gateway switch 8 of the international communication network β, the international relay switch 9 if necessary, and the international subscription. International VP via integrated switch 2
N-Instructs the contracting subscriber E to perform connection processing. In accordance with the instruction, a series of communication paths 10 including a domestic communication path 10a and an international communication path 10b passing through the border interconnection point 7 over the domestic public telecommunication network α and the international communication network β are formed.

After that, by the processing of the international communication network side, the international subscriber exchange 2 sends a ringing tone for calling the international VPN / contracting subscriber E, and the terminal E'of the international VPN / contracting subscriber E goes off-hook. Then, a response signal (ANM) is sent to the domestic subscriber exchange 1. As a result, domestic VPN, terminal A'of subscriber A and international VPN
・ The terminal E'of the contracted subscriber E is connected and the call is ready.

Although representative apparatus examples and method examples of the present invention have been described above, the present invention is not necessarily limited to the means and method examples of these apparatus examples.
The present invention can be appropriately modified and carried out within a range where the object of the present invention is achieved and the effects described later are obtained.

[0075]

As described above, according to the present invention, when connecting from a domestic virtual private network to an international virtual private network,
Since the processing can be performed in the on-net state, the domestic VPN contract subscriber has an effect of being able to carry out international communication with the international VPN extension number or the unique VPN extension number without being aware of whether it is on-net or off-net. Especially international V
Since the PN can be treated as an extension within the domestic VPN, the private number plan can be sufficiently advanced.

[Brief description of drawings]

FIG. 1 is a conceptual diagram showing a configuration of a normal virtual private network.

FIG. 2 is a partially omitted schematic diagram showing the configuration of a system device of the present device example.

FIG. 3 is an example of a domestic general subscriber ID / domestic group number comparison table provided in a domestic network service control station.

FIG. 4 is an example of a data table for VPN / international extension connection provided in a domestic network service control station.

FIG. 5 is an example of a data table for connecting an international extension with a unique extension number provided in a domestic network service control station.

FIG. 6 shows a sequence example when a domestic VPN / contract subscriber communicates with an international VPN / contract subscriber using the extension connection function of the domestic virtual private network in the method example of the present invention.

FIG. 7 shows a sequence example when communication is made from a domestic VPN / contract subscriber to an international VPN / contract subscriber using another extension method of the present invention by using the extension connection function of the domestic virtual private network.

FIG. 8 shows an example of a sequence when a domestic VPN / contract subscriber uses an extension connection function of a domestic virtual private network to communicate with a domestic VPN / contract subscriber using a conventional method.

FIG. 9 is a detailed explanatory diagram showing a configuration of a conventional system device implementing the same as above.

[Explanation of symbols]

1 ... Domestic subscriber exchange 2 ... International subscriber exchange 3 ... Common line signaling network 4 ... Domestic network service control station 5 ... Domestic relay exchange 6 ... Domestic gateway exchange 7 ... Border interconnection point 8 ... International gateway exchange 9 ... International relay Exchange 10 ... Communication path 10a ... Domestic communication path 10b ... International communication path 11 ... Supp section 12 ... Domestic general subscriber ID / Domestic VPN subscriber comparison table 13 ... Domestic general subscriber ID / Domestic group number comparison table 14 ... By VPN -Data table for international extension connection 15 ... Control unit 16 ... Data table for international extension connection with unique extension number S1, S2 ... Control signal α ... Domestic public telecommunications network β ... International communication network ε ... Domestic virtual private network (VPN) MG ... Member group

Front page continuation (72) Inventor Takashi Anzai 1-1-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Nihon Telegraph and Telephone Corporation

Claims (18)

[Claims] 1. A domestic virtual private network (VPN) for a specific international subscriber group connected to a domestic public communication network including a domestic private branch exchange is controlled through a common line signaling network. When performing an extension connection process to an international VPN, for each VPN internal extension, the international VPN extension number for each VPN is associated with the connection identification number (prefix) of the international communication network to which the international VPN extension number belongs. When a database is prepared in advance and an international VPN extension number from a domestic VPN subscriber is received through the common line signaling network, the database for international extension connection is searched for a prefix corresponding to the international VPN extension number, An international routing number obtained by adding the prefix to the international VPN extension number for the domestic subscriber exchange is used for the international communication network. To the international VPN subscriber by instructing through the common line signaling network to connect to the international virtual private network, and forming a series of communication paths passing through the border interconnection points on the way to the domestic public communication network and the international communication network. An extension connection method from a domestic virtual private network to an international virtual private network characterized by performing connection processing. 2. A domestic virtual private network (VPN) for a specific international subscriber group connected to a domestic public communication network including a domestic private branch exchange is controlled through the common line signaling network. Then, when processing the extension connection to the international VPN, the unique extension number and VP unique to the domestic subscriber group of the domestic VPN
A database for international extension connection with a unique extension in which a prefix is added to an international VPN extension number for each N is prepared in advance, and a unique extension number from a domestic VPN subscriber is stored in the common line. When it is received through the signaling network, the database for international extension connection with the unique extension number is searched for the international routing number corresponding to the unique extension number, and the routing number can be used to connect to the international virtual private network in the international communication network. And instructing through the common line signaling network to form a series of communication paths through the domestic public communication network and the international communication network and passing through the border interconnection points on the way to connect to the international VPN subscriber. Extension connection method from domestic virtual private network to international virtual private network. 3. The extension from the domestic virtual private network to the international virtual private network according to claim 2, wherein the unique extension number is a dial number having a number of digits shorter than a normal call dial number. How to connect. 4. The domestic virtual private network according to claim 1, wherein the communication path comprises a domestic communication path, a border interconnection point, and an international communication path sequentially and consistently. Extension connection method to international virtual private network. 5. The domestic virtual private network according to claim 1, 2, 3 or 4, wherein the domestic public communication network and the international communication network use electricity, radio waves or light as communication media. Extension connection method to a virtual private network. 6. The international virtual private network from the virtual private network according to claim 1, 2, 3, 4 or 5, wherein the common line signaling network uses electricity, radio waves or light as a signal medium. How to connect an extension to the network. 7. An extension connection from a domestic virtual private network (VPN) to an international VPN is made to a specific international subscriber group connected to a domestic public communication network including a domestic subscriber exchange through a common line signaling network. A domestic network service control station for controlling is provided, and in the domestic subscriber exchange, a subscriber check table for checking whether or not the calling subscriber is a subscriber of a domestic VPN subscriber group, and the domestic network service control station The domestic network service control station includes a search table for searching which domestic VPN subscriber group the calling subscriber belongs to, and a SUP unit for transmitting and receiving control signals to and from each VPN. International VPN extension number and the relevant international VP
An international extension connection data table for each VPN, which corresponds to the connection identification number (prefix) of the international communication network to which the N extension number belongs, and a control section for transmitting and receiving control signals to and from the SUP section. An extension from a domestic virtual private network to an international virtual private network, characterized by constructing a series of communication paths that pass through the border interconnection points on the way between the domestic public communication network and the international communication network. Connected system equipment. 8. An extension connection from a domestic virtual private network (VPN) to an international VPN is made to a specific international subscriber group connected to a domestic public communication network including a domestic subscriber exchange through a common line signaling network. A domestic network service control station for controlling is provided, and in the domestic subscriber exchange, a subscriber check table for checking whether or not the calling subscriber is a subscriber of a domestic VPN subscriber group, and the network service control station And a SUP unit for transmitting and receiving control signals between the VP and the network service control station.
A search table for searching whether or not it belongs to N subscriber groups,
Between the data table for international extension connection with a unique extension number in which the unique extension number unique to the domestic subscriber group of the VPN and the international routing number obtained by adding a prefix to the international VPN extension number for each VPN are associated with the SUP section. And a control unit for transmitting and receiving control signals with each other, so that a series of international communication paths can be freely formed across the domestic public communication network and the international communication network and passing through border interconnection points on the way. An extension connection system device from a domestic virtual private network to an international virtual private network. 9. The domestic virtual private network to the international virtual private network according to claim 8, wherein the unique extension number is a dial number having a number of digits shorter than a normal call dial number. Extension connection system equipment. 10. The international virtual network from the domestic virtual private network according to claim 7, 8 or 9, wherein the subscriber check table is a domestic general subscriber ID / domestic VPN subscriber comparison table. An extension connection system device to a dedicated network. 11. The international virtual private network from the domestic virtual private network according to claim 7, 8, 9 or 10, wherein the search table is a domestic general subscriber ID / domestic group number comparison table. Extension connection system equipment to the network. 12. The international virtual network from a domestic virtual private network according to claim 7, 10 or 11, wherein the data table for VPN-based international extension connection is an international extension number / prefix contrast conversion table. An extension connection system device to a dedicated network. 13. The international extension connection-like data table with unique extension number is a unique extension number / prefix + international extension number comparison conversion table, according to claim 8, 9, 10, 11 or 12. Extension connection system device from the described domestic virtual private network to the international virtual private network. 14. The communication channel comprises a domestic communication channel and an international communication channel which mediate a border interconnection point, and the communication channel is characterized by comprising:
Or, an extension connection system device from the domestic virtual private network to the international virtual private network described in 13. 15. The international virtual private network from a domestic virtual private network according to claim 14, wherein the domestic communication path is composed of a domestic subscriber exchange and, if necessary, a domestic transit exchange and a domestic gateway exchange. Extension connection system equipment to the network. 16. The international virtual private network according to claim 14, wherein the international communication path comprises an international subscriber exchange, an international transit exchange and an international gateway exchange as required. An extension connection system device to a virtual private network. 17. The public communication network and the international communication network use electricity, radio waves or light as communication media.
An extension connection system device from the domestic virtual private network according to 2, 13, 14, 15, 16 or 17 to the international virtual private network. 18. The common line signal network uses electricity, radio waves or light as a signal medium.
An extension connection system device from the domestic virtual private network according to 2, 13, 14, 15, 16 or 17 to the international virtual private network.