KR20100090837A - Direct calling system using main identification number and method of the same - Google Patents

Abstract

PURPOSE: A direct connecting system using a virtual extension number and a method thereof are provided to directly connect to a desired terminal of a receiver through the virtual extension number, thereby largely increasing the convenience of a sender and the receiver. CONSTITUTION: A terminal by network(2,4,6,102,104,106) performs communication through each network. A server for controlling heterogeneous network interlocking(14) gives a virtual extension number to each terminal. The server for controlling heterogeneous network interlocking sets interlocking information of a real phone number and the virtual extension number. The server for controlling heterogeneous network interlocking controls a direct call access to the terminal of heterogeneous network through the virtual extension number after connecting with switches(8,12) of each net.

Description

DIRECT CALLING SYSTEM USING MAIN IDENTIFICATION NUMBER AND METHOD OF THE SAME}

The present invention relates to a direct access system using a virtual extension number and a method thereof, and more particularly, to a virtual extension number assigned to each heterogeneous terminal connected to a heterogeneous network, and to provide interworking information between the virtual extension number and the actual telephone number. In addition to the exchanges in each network or the group-specific private exchanges, a direct call connection is made to terminals of heterogeneous networks by using a virtual extension number, and a terminal set by a called party by using a virtual extension number through a group private exchange. The present invention relates to a direct connection system using a virtual extension number for direct call connection, and a method thereof.

As is well known, due to the recent development of information and communication technology, the development of information providing technology that provides real-time information to various subscribers through at least one host server through a remote data communication network is actively underway.

Based on this, in recent years, information sorting and compression technologies are being developed to provide more convenient access to neighboring technologies such as cache memory expansion technology to provide accurate information to subscribers more quickly and subscribers' tastes and preferences. It is also accelerating the development of various contents and its solutions.

This trend is no exception in the telecommunications sector. Since the direction of technology development is aimed at human convenience, a method that is cumbersome for the user and takes more time is being implemented even in a communication system that is currently implemented, and thus solves the problem of the conventional method urgently. I have to do it.

For example, in the case of a conventional extension telephone system, a call connection is performed between a landline telephone using a key phone box or a private branch exchange (PBX) or the like, and a call is made by assigning an extension number to each telephone. Such an extension call system is generally used as an additional service of a telephone service provider by using an extension of the telephone service provider's exchange system, and it can be used in an area where the Internet is available without the limitation of space as Internet phones become popular. Same as analogue form except that.

In this case, the conventional extension telephone system has a disadvantage in that an extension call can be made only in a place where a wired telephone exists by allocating and managing an extension number for only a wire telephone.

In places where there is no extension corded phone, the caller could only make calls by calling the called party's cell phone directly, or by calling the recipient with his / her extension phone in advance. The call should be made from a landline telephone, and even if the caller was outside, there was a problem that an internal call was impossible.

In this case, it is easy to memorize the extension number in the same group, and it is easy to use, but if you need to make a call in a situation where it is not possible, search the mobile number again or call the company directly to find out the mobile number of the called party. The problem was that I had to try the call again. In this case, there is a problem that the caller has to repeatedly perform a very cumbersome call attempt.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described circumstances of the prior art, and assigns a virtual extension number to each heterogeneous terminal connected to a heterogeneous network, and exchanges the interworking information between the virtual extension number and the actual telephone number of each network. In addition to each private exchange, a direct call connection is made to a terminal of a heterogeneous network using a virtual extension number, and a direct call connection is made to a terminal set by a called party using a virtual extension number even through a group private exchange. It is an object of the present invention to provide a direct access system using the virtual extension number and a method thereof.

In order to achieve the above object, according to a preferred embodiment of the present invention and a terminal for each network made possible to communicate through each network of landline phone or Internet phone or mobile phone; Assign a virtual extension number to each terminal connected to the heterogeneous network, set the interworking information between the virtual extension number and the actual telephone number, connect to the switch of each network, and use the virtual extension number to access the terminal of the heterogeneous network. There is provided a direct access system using a virtual extension number comprising a heterogeneous network interworking control server for controlling a direct call connection.

Preferably, the terminal is provided with a direct connection system using a virtual extension number, characterized in that any one of the terminal of the wired telephone terminal, the Internet phone, the mobile telephone terminal.

Preferably, the heterogeneous network interworking control server is a direct access system using a virtual extension number, characterized in that a table set with a virtual extension number pre-assigned therein and an actual telephone number associated with the virtual extension number is constructed. Is provided.

Preferably, the virtual extension number set in the heterogeneous network interlocking control server and the actual telephone number associated with the virtual extension number are set by the called party. A direct access system using the virtual extension number is provided.

Preferably, the heterogeneous network interworking control server is connected to a wired telephone operator network, an Internet telephone operator network, a mobile telephone operator network therein to receive a virtual extension number, and a network for accessing a network accessible by the virtual extension number. A connecting portion; An authentication processing unit for authenticating the virtual extension number requester; An access number matching processing processor configured to receive the assigned virtual extension number and the actual telephone number and associate registration processing; A network screen processor for discriminating and processing a network to perform call forwarding processing according to an actual telephone number; A group number management processor for managing an access number assigned to each group in order to attempt a call connection to a virtual extension number through an integrated network other than the group network; A database for storing group number, virtual extension number, and actual telephone number information, storing owner authentication information of the virtual extension number, and storing network identification information for each actual telephone number; A control unit for extracting the actual telephone number associated with the virtual extension number included in the caller request information of the caller to identify the network and forwarding the actual telephone number information to the exchange of the corresponding network to control the call connection. A direct connection system using a virtual extension number is provided.

Preferably, the heterogeneous network is provided with a direct access system using a virtual extension number comprising a wireline telephone operator network, an internet telephone operator network, and a mobile telephone operator network.

Preferably, the heterogeneous network interworking control server is provided with a direct access system using a virtual extension number, characterized in that the table set up by further linking the group number, along with the virtual extension number and the actual telephone number therein. .

Preferably, when the heterogeneous network interworking control server is installed in a private exchange, a direct access system using a virtual extension number is provided, wherein a table in which only a virtual extension number and a real phone number are linked and registered is provided therein. do.

On the other hand, the present invention comprises a first process of receiving a virtual extension number through any one caller terminal; Extracting a real phone number associated with the virtual extension number; A third step of attempting call connection processing; There is provided a direct access method using a virtual extension number comprising a fourth process of connecting a terminal between a caller and a called party.

Preferably, the step of receiving the virtual extension number request signal before the first process; Authenticating the requestor; Assigning a virtual extension number; Receiving an actual telephone number associated with the corresponding virtual extension number; There is provided a direct access method using a virtual extension number further comprising the step of registering in association with the virtual extension number and the actual phone number.

Preferably, the step of determining the caller access network between the first process and the second process; Determining whether the call access number is available; A call forwarding process to a heterogeneous network interlocking control server when the call is unavailable; There is provided a direct access method using a virtual extension number further comprising the step of determining an accessible network of the corresponding virtual extension number.

The direct access system and the method using the virtual extension number according to the present invention, even if the receiver does not inform the caller of the mobile phone number, landline, or Internet phone number but only the virtual extension number, the caller is called through the virtual extension number. Since the connection to the desired terminal can be made directly, there is an advantage that the convenience of the caller and the called party can be greatly increased.

EMBODIMENT OF THE INVENTION Hereinafter, this invention is demonstrated in detail with reference to drawings.

1 is a schematic diagram showing a schematic configuration of a direct connection system using a virtual extension number according to an embodiment of the present invention.

Referring to this, a direct access system using a virtual extension number according to an embodiment of the present invention assigns a virtual extension number to each heterogeneous terminal connected to a heterogeneous network, and interworking the virtual extension number with an actual telephone number. The information is added to the exchanges of each network or the group-specific private exchanges so that direct call connection can be made to the terminal of the heterogeneous network by using the virtual extension number. It is a system that allows direct call connection to a terminal.

That is, in the direct access system using a virtual extension number according to an embodiment of the present invention, a direct call connection is made to a terminal desired by a called party without establishing an incoming call by establishing a virtual extension number and a real phone number in a group private exchange. The receiver can establish a heterogeneous network interlocking control server connected to the exchanges provided in each network outside the group, and establish a virtual extension number and a real telephone number in association with the heterogeneous network interlocking control server. The terminal can be configured to make a direct call connection without an incoming call.

Therefore, even if the called party does not inform the caller of the mobile phone number, landline or Internet phone number, but only the virtual extension number, the caller can directly access the terminal desired by the called party through the virtual extension number. The convenience of the called party can be greatly increased.

To this end, the direct access system using a virtual extension number according to an embodiment of the present invention is provided with a terminal for each network (2, 4, 6, 102, 104, 106) made possible to communicate through each network of a landline phone or an Internet phone or a mobile phone have.

At this time, the terminal (2, 4, 6, 102, 104, 106) is any one of the landline telephone terminal (2,102), Internet phone (4,104), mobile phone terminal (6,106), depending on whether the caller terminal or called party terminal caller wired telephone terminal (2) And a called landline telephone terminal 102; A caller internet phone 4 and a caller internet phone 104; The calling mobile phone terminal 6 and the called mobile phone terminal 106 are classified.

In addition, in the direct access system using the virtual extension number according to an embodiment of the present invention, the virtual extension number connection processing is also performed through a private branch exchange (PBX) provided in the group network, but the virtual extension is performed even in an integrated network outside the group network. Call connection processing is performed through the number, and the integrated network is called a heterogeneous network. The heterogeneous network includes a landline telephone network, an Internet telephone network, and a cellular telephone network.

Accordingly, in the direct access system using the virtual extension number according to an embodiment of the present invention, a wired telephone network connected to a wireline telephone operator network, an internet telephone operator network, and a mobile telephone operator network to perform call connection processing between terminals connected to each dedicated network. A switch 8, an Internet telephone exchange server 10, and a mobile communication switch 12 are included, and the configuration of other base stations and local switching stations, etc., is well known and thus omitted in advance.

On the other hand, in the direct access system using a virtual extension number according to an embodiment of the present invention, a virtual extension number is assigned to each terminal connected to a heterogeneous network, in particular, a receiver terminal (102, 104, 106) to enable direct connection, and the virtual Set the interworking information of the extension number and the actual phone number, and control the direct connection to the terminal 102, 104, 106 of the heterogeneous network by using the virtual extension number by connecting to the switch (8, 10, 12) of each network The heterogeneous network interlocking control server 14 is configured.

Therefore, the switch 8, 10, 12 of each network determines whether it is an identification phone number capable of self-call connection or an identification phone number that is not available to call, so that the identification phone number that cannot be connected is the heterogeneous network interlocking control server ( 14) the call forwarding process is performed, and the heterogeneous network interworking control server 14 extracts the actual telephone number associated with the corresponding identification telephone number, for example, the virtual extension number, to the exchange 8 or 10 or 12 of the corresponding network. Call forwarding processing is performed to establish a call connection.

To this end, the heterogeneous network interworking control server 14 registers the virtual extension number donated by each called party and the actual telephone number designated by the called party.

Therefore, in the direct access system using the virtual extension number according to an embodiment of the present invention, whatever type of terminal 102, 104, 106 the called party sets as the virtual extension number, the caller desires the terminal 102, 104, 106 through the virtual extension number. ) Can be connected.

Through this, in the direct access system using the virtual extension number according to an embodiment of the present invention, the caller's telephone terminal is a wired telephone terminal (2), and the called party of the virtual extension number set in the heterogeneous network interworking control server (14). If the actual phone number is the telephone number of the wired telephone terminal 102, the wired switch 8 which is connected to the wireline telephone operator network and performs a call connection of each wired telephone terminal 2,102 receives a virtual extension number and receives a direct call. The connection number is determined as an inaccessible number, and the heterogeneous network interworking control server 14 forwards the corresponding virtual extension number.

Then, the heterogeneous network interworking control server 14 extracts the actual telephone number associated with the corresponding virtual extension number, identifies the network of the corresponding actual telephone number, and forwards it to the exchange of the corresponding network. Since the extension number is set in connection with the telephone number of the wired telephone terminal 102, the heterogeneous network interworking control server 14 performs a call forwarding process to the wired switch 8 so that a call connection can be made.

On the other hand, in the direct access system using a virtual extension number according to an embodiment of the present invention, the caller's telephone terminal is a wired telephone terminal (2), and the caller actually sets the virtual extension number set in the heterogeneous network interworking control server (14). If the telephone number is the telephone number of the Internet phone 104, the wired switch 8, which is connected to the wireline telephone operator network and receives the virtual extension number from the caller's wireline telephone terminal 2, receives the virtual extension number and receives a direct call. The connection number is determined as an inaccessible number, and the heterogeneous network interworking control server 14 forwards the corresponding virtual extension number.

Then, the heterogeneous network interworking control server 14 extracts the actual telephone number associated with the corresponding virtual extension number, identifies the network of the corresponding actual telephone number, and forwards it to the exchange of the corresponding network. Since the extension number is set in association with the telephone number of the Internet phone 104, the heterogeneous network interworking control server 14 performs a call forwarding process to the Internet telephone exchange server 10 to make a call connection.

In addition, in the direct access system using the virtual extension number according to an embodiment of the present invention, the caller's telephone terminal is a wired telephone terminal (2), and the caller actually sets the virtual extension number set in the heterogeneous network interworking control server (14). If the telephone number is the telephone number of the mobile telephone terminal 106, the wired switch 8, which is connected to the wireline telephone operator network and receives the virtual extension number from the caller's wireline telephone terminal 2, receives the virtual extension number directly. The call is determined as a number that cannot be connected, and the virtual extension number is forwarded to the heterogeneous network interworking control server 14.

Then, the heterogeneous network interworking control server 14 extracts the actual telephone number associated with the corresponding virtual extension number, identifies the network of the corresponding actual telephone number, and forwards it to the exchange of the corresponding network. Since the extension number is set in association with the telephone number of the mobile phone terminal 106, the heterogeneous network interworking control server 14 performs call forwarding processing to the mobile communication switch 12 so that a call connection can be made.

In this manner, in the direct access system using the virtual extension number according to the embodiment of the present invention, the caller's terminal (2, 4, 6) does not know what kind of terminal (102, 104, 106) the caller sets as the virtual extension number. Regardless of which terminal it is, the caller can connect to the terminals 102, 104, and 106 desired by the called party through the virtual extension number assigned to each called party.

2 is a table illustrating a virtual extension number table constructed in a direct access system using a virtual extension number according to an embodiment of the present invention, and FIG. 3 is a direct connection using a virtual extension number according to an embodiment of the present invention. FIG. 4 is a diagram illustrating a configuration of a business card of a user who can use a direct connection system using a virtual extension number according to an embodiment of the present invention.

Referring to this, the heterogeneous network interworking control server 14 included in the direct access system using the virtual extension number according to an embodiment of the present invention associates a virtual extension number pre-assigned therein with the virtual extension number. A table is set up with actual telephone numbers.

That is, the table 16 constructed in the database of the heterogeneous network interworking control server 14 (see FIG. 5) has a virtual extension number 20 and an actual telephone number 22 associated therein, for each called party. Is built. In addition, telephone type code information 24 that can determine the network type of the actual telephone number 22 is registered in association with each virtual number.

On the other hand, the heterogeneous network interworking control server 14 included in the direct access system using the virtual extension number according to an embodiment of the present invention may be built in the group network, or may be built in the group external network. Therefore, if the heterogeneous network interworking control server 14 is established in the group network, the call connection is designed in the group, and the call is made through the virtual extension number to the colleagues in the group network. Group identification number 18 is not required.

On the contrary, if the heterogeneous network interworking control server 14 is built in the group external network, the group identification number 18, that is, the company number, must be set in association with the table 16.

For example, in order to register the virtual extension number 101 assigned to the called party to the heterogeneous network interworking control server 14 located in the group external network, each called party is assigned a group identification number (for example, 1688) and a virtual extension. The number 101 is registered in the heterogeneous network interworking control server 14 in association with the called party's terminal telephone number (e.g., 010-123-4567 in the case of a mobile phone).

Then, the heterogeneous network interworking control server 14 is a group identification number (e.g., 1688) and virtual extension number (101) for each called party, and the terminal phone number of the called party (e.g., a mobile phone) to which the called party wishes to connect. , 010-123-4567 is created in conjunction with a table 16 constructed to build a database (see FIG. 5: 50).

Therefore, the called party uses the group identification number 18 and the virtual extension number 20 as the contact information 36 on the business card 30 on which the company name 32 and the name 34 are written, as shown in FIG. It can be printed and distributed to multiple callers. If the called party associates a mobile phone number with a virtual extension number as described above, the caller can enter the called party's virtual extension number through any terminal (2, 4, 6). The call can be connected to the called party's mobile phone.

Through this, when the called party associates a specific virtual extension number (eg, 101) with a wired telephone number (eg, 2645), the heterogeneous network interworking control server 14 performs a wired call of the called party through a search of the database 50. If a call connection is executed with the telephone terminal 102 and the called party associates a specific virtual extension number (eg, 101) with an Internet phone number (eg, 038-256789), the heterogeneous network interworking control server 14 A call is made to the called party's Internet phone 104 by searching the database 50, and the called party sets a specific virtual extension number (eg, 101) and a phone number of the cellular phone (eg, 010-123-4567). In this case, the heterogeneous network interworking control server 14 performs a call connection with the called party's mobile phone terminal 106 through a search of the database 50. If it is associated with the number of the mobile phone terminal 106, the heterogeneous network interworking control server 14 processes to ignore the group identification number.

5 is a block diagram showing the configuration of a heterogeneous network interworking control server included in a direct access system using a virtual extension number according to an embodiment of the present invention.

Referring to this, the heterogeneous network interworking control server 14 included in the direct access system using the virtual extension number according to an embodiment of the present invention includes a network connection unit, an authentication processing unit, an access number matching processor, and a network-specific processor. And a group number management processor, a database, and a control unit.

Reference numeral 40 denotes a network connection unit for receiving a virtual extension number connected to a landline telephone operator network, an internet telephone operator network, a mobile telephone operator network, and accessing a network accessible by the virtual extension number.

Reference numeral 42 denotes an authentication processing unit (AUC) for authenticating the virtual extension number requestor, and reference numeral 44 denotes an access number matching processing processor for receiving the assigned virtual extension number and the actual telephone number and performing the associated registration processing. Reference numeral 46 denotes a network screen processor for discriminating and processing a network to perform call forwarding processing based on an actual telephone number.

Reference numeral 48 denotes a group number management processor that manages an access number assigned to each group in order to attempt to access a virtual extension number through an integrated network other than the group network, and reference numeral 50 denotes a group number and a virtual extension number. It represents a database that stores the actual phone number information, stores the owner authentication information of the virtual extension number, and stores the network identification information for each real phone number.

On the other hand, reference numeral 52 identifies the network by extracting the actual telephone number associated with the virtual extension number included in the caller's call connection request information, and forwards the actual telephone number information to the exchange of the corresponding network to control the call connection. The control unit is shown.

The function and operation of a direct connection system using a virtual extension number according to an embodiment of the present invention having the above-described configuration will be described in detail with reference to the accompanying drawings.

6 is a flowchart illustrating a signal flow of a direct access system using a virtual extension number according to an embodiment of the present invention, and FIG. 7 shows a virtual flow through a direct access system using a virtual extension number according to an embodiment of the present invention. This is a flowchart showing the signal flow for registering the extension number.

First, a direct access system using a virtual extension number according to an embodiment of the present invention is a heterogeneous network interworking control server 14 via an exchange 8 or 10 or 12 through one caller terminal 2, 4 or 6. The virtual extension number is received.

Then, the heterogeneous network interworking control server 14 extracts the actual telephone number associated with the corresponding virtual extension number and attempts a call connection process, and the caller terminal 2, 4, 6 and the caller terminal 102, 104, 106 connect. Process it.

In this case, the heterogeneous network interworking control server 14 may register the virtual extension number with the heterogeneous network interlocking control server 14 before receiving the virtual extension number from the caller terminal 2, 4, 6. It should be preceded by the virtual extension registration process is made from the virtual extension number request of the called party.

That is, the called party connects to the heterogeneous network interlocking control server 14 to request a virtual extension number, and when the heterogeneous network interlocking control server 14 receives the request signal, the heterogeneous network interlocking control server 14 is received. ) Authenticates the requestor.

After the authentication, the virtual extension number is assigned, and the virtual extension number can be previously assigned to the group network.

In addition, the heterogeneous network interworking control server 14 receives an actual telephone number to be associated with a specific virtual extension number from the called party, and registers the virtual extension number in association with the received actual telephone number.

In this case, if the heterogeneous network interworking control server 14 is not connected to the private exchange (PBX) provided in the group network, but is connected to each of the exchanges 8, 10 and 12 provided in the group external network, the heterogeneous network interworking control server 14 is connected. Since the control server 14 is a server capable of switching the call connection of the integrated network, the group identification number must be registered in association with the virtual extension number and the actual telephone number.

Therefore, in the state of association registration, when one of the terminals 8 or 10 or 12 receives the group identification number and the virtual extension number from the specific calling party terminal 2 or 4 or 6, the caller access network is determined. Then, it is determined whether the call connection number is possible.

And, if the call is not accessible, the switch exchanges Call Forwarding to the heterogeneous network interlocking control server 14, and the heterogeneous network interlocking control server 14 extracts the actual telephone number registered in association with the virtual extension number. In addition, a network (8 or 10 or 12) which accesses the network and executes a call connection is identified by determining the accessible network of the corresponding virtual extension number and calling the corresponding real telephone number by call forwarding.

Therefore, in the direct access system using the virtual extension number according to an embodiment of the present invention, what kind of terminal 102, 104, 106 is set by the called party as the virtual extension number, or which terminal the caller's terminal 2, 4, 6 is. Regardless of whether or not, the caller can connect to the terminal 102, 104, and 106 desired by the called party through the virtual extension number assigned to each called party.

Meanwhile, the direct connection system and the method using the virtual extension number according to the embodiment of the present invention are not limited only to the above-described embodiments, but various modifications can be made without departing from the technical gist of the present invention.

1 is a schematic diagram showing a schematic configuration of a direct connection system using a virtual extension number according to an embodiment of the present invention;

2 is a table illustrating a virtual extension number table constructed in a direct access system using a virtual extension number according to an embodiment of the present invention;

3 is a view showing a state in which a direct connection through a direct connection system using a virtual extension number according to an embodiment of the present invention;

4 is a view showing the configuration of a business card of a user who can use a direct connection system using a virtual extension number according to an embodiment of the present invention;

5 is a block diagram showing a configuration of a heterogeneous network interworking control server included in a direct access system using a virtual extension number according to an embodiment of the present invention;

6 is a flowchart illustrating a signal flow of a direct access system using a virtual extension number according to an embodiment of the present invention;

7 is a flowchart illustrating a signal flow of registering a virtual extension number through a direct access system using a virtual extension number according to an embodiment of the present invention.

* Description of the symbols for the main parts of the drawings *

2, 4, 6: caller terminal, 8: wired switch,

10: Internet telephone exchange server, 12: mobile communication exchange,

14: heterogeneous network interworking control server, 102, 104, 106: called terminal.

Claims (11)

A terminal for each network configured to communicate through each network of a wired telephone, an internet telephone, or a mobile telephone; Assign a virtual extension number to each terminal connected to the heterogeneous network, set the interworking information between the virtual extension number and the actual telephone number, connect to the switch of each network, and use the virtual extension number to access the terminal of the heterogeneous network. Direct connection system using a virtual extension number comprising a heterogeneous network interworking control server to control the direct call connection. The direct access system using a virtual extension number according to claim 1, wherein the terminal is any one of a wired telephone terminal, an internet phone, and a mobile telephone terminal. The method according to claim 1, wherein the heterogeneous network interworking control server has a table in which a virtual extension number pre-assigned therein and a real phone number associated with the virtual extension number are constructed. Connection system. The direct access system using a virtual extension number according to claim 1, wherein the setting of the virtual extension number set in the heterogeneous network interworking control server and the actual telephone number associated with the virtual extension number is set by the called party. According to claim 1, wherein the heterogeneous network interlocking control server therein, A network connection unit connected to a landline telephone operator network, an internet telephone operator network, and a cellular telephone operator network to receive a virtual extension number and to access a network accessible by the virtual extension number; An authentication processing unit for authenticating the virtual extension number requester; An access number matching processing processor configured to receive the assigned virtual extension number and the actual telephone number and associate registration processing; A network screen processor for discriminating and processing a network to perform call forwarding processing according to an actual telephone number; A group number management processor for managing an access number assigned to each group in order to attempt a call connection to a virtual extension number through an integrated network other than the group network; A database for storing group number, virtual extension number, and actual telephone number information, storing owner authentication information of the virtual extension number, and storing network identification information for each actual telephone number; A control unit for extracting the actual telephone number associated with the virtual extension number included in the caller request information of the caller to identify the network and forwarding the actual telephone number information to the exchange of the corresponding network to control the call connection. Direct connection system using a virtual extension number. The direct access system using a virtual extension number according to claim 1, wherein the heterogeneous network comprises a wireline telephone operator network, an internet telephone operator network, and a mobile telephone operator network. The direct access system using the virtual extension number according to claim 3, wherein the heterogeneous network interlocking control server has a table set up by further linking the group number together with the virtual extension number and the actual phone number. . [8] The direct connection using the virtual extension number according to claim 7, wherein the heterogeneous network interlocking control server is installed in a private exchange. system. A first process of receiving a virtual extension number through one calling terminal; Extracting a real phone number associated with the virtual extension number; A third step of attempting call connection processing; And a fourth process of connecting the terminal between the calling party and the called party. The method of claim 9, wherein prior to the first step, Receiving a virtual extension number request signal; Authenticating the requestor; Assigning a virtual extension number; Receiving an actual telephone number associated with the corresponding virtual extension number; Direct access method using a virtual extension number further comprising the step of registering in association with the virtual extension number and the actual telephone number. The method of claim 9, wherein between the first process and the second process, Determining a caller access network; Determining whether the call access number is available; A call forwarding process to a heterogeneous network interlocking control server when the call is unavailable; And a process of determining a network to which the corresponding virtual extension number can be connected is directly connected.

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