KR101069116B1 - Voip internet phone service system using ip range analysis and method thereof - Google Patents

Abstract

A VoIP Internet telephony service system using IP band analysis and a method thereof are disclosed. The VoIP Internet telephony service system provides an Internet telephony service according to VoIP based on an IP network, and may determine an IP band to which an IP address of the Internet telephony terminal belongs, and provide an Internet telephony service based on the IP band.

VoIP, Internet Phone, IP Band, Limit, Caller ID, Country Code

Description

VoIP Internet Phone Service System Using IP Band Analysis and its Method {VOIP INTERNET PHONE SERVICE SYSTEM USING IP RANGE ANALYSIS AND METHOD THEREOF}

Embodiments of the present invention relate to a VoIP Internet telephony service system and method for providing a VoIP Internet telephony service on an IP basis.

With the spread of the Internet, the use of Internet telephony according to Voice over Internet Protocol (VoIP) has been greatly increased based on the IP network. Such an internet phone enables a call to an existing wired or wireless network through a dedicated program installed in an internet phone terminal, for example, a computer. The main advantage of VoIP is that it integrates telephony services using existing IP networks, allowing telephony users to receive long-distance and international telephony services over the Internet and intranet environments at local phone rates. Recently, call connection technologies and terminal devices have been developed to enable video calls as well as voice calls through VoIP.

However, with the expansion of the implementation of the Internet phone number porting system, when the terminal makes a call in a foreign country due to the local mobility of the Internet phone, the international call cannot be identified and the damage caused by this is rapidly increasing. In case of an Internet telephone number system (for example, 070), if the VoIP calling terminal is moved abroad, the calling number is a number using a domestic Internet telephone number system. In the case of a PSTN number system, the PSTN is an Internet telephone number. The call is made with a calling number having a domestic local number system. In this case, when the terminal is moved abroad and used in a malicious manner such as voice phishing, the calling party may receive the caller without suspicion because the calling number is received according to the domestic number system. In addition, due to the characteristics of VoIP Internet telephony service operating on the basis of IP network, billing and call processing is performed based on the calling number and called number. However, there is a difficulty in limiting calls by IP band.

One embodiment of the present invention provides a VoIP Internet telephony service system and method capable of limited call processing and region charging based on IP band in consideration of characteristics of VoIP Internet telephony service operating on an IP basis.

An embodiment of the present invention provides a VoIP Internet telephony service system and method for preventing and tracking phishing and the like by identifying terminals located overseas based on IP bands.

An embodiment of the present invention is to determine the properties of a call originating from an IP terminal (call originating from a terminal located in the country, or a call originating from a terminal located abroad) to set and display the attributes of the call to the same system PSTN / PLMN signal (ISUP / No.7), if it is determined that the called terminal is accommodated in another system (PSTN / PLMN) or in another system of IP network. The present invention provides a method of converting and transmitting a call attribute and a method of transmitting a signal (SIP) of an IP network.

VoIP Internet telephony service system according to an embodiment of the present invention is a VoIP Internet telephony service system for providing an Internet telephony service based on IP network based on the IP network, the IP address belongs to the IP address of the Internet telephone terminal An IP band determination unit to determine an IP band; And a service providing unit for providing an Internet telephone service to the Internet telephone terminal based on the determined IP band.

In one embodiment of the present invention, the IP band determination unit determines an identification code corresponding to the IP band.

In one embodiment of the present invention, the service providing unit is a terminal registration unit that allows or restricts registration of the Internet telephone terminal for the Internet telephone service according to the IP band, and identification of the IP band in outgoing information according to the IP band. A code insertion unit for inserting a code, a text requesting unit requesting a text transmission system to transmit a text message related to the identification code of the IP band to a destination terminal to which the Internet telephone terminal requests a call connection according to the IP band; A signal processor for setting a display value indicating call type information corresponding to the IP band in a call signal for the Internet telephone terminal according to the IP band, and billing for processing the billing for the Internet telephone service according to the IP band It may include a processing unit.

In one embodiment of the present invention, the Internet phone terminal is in a private network including a network address translation (NAT), wherein the IP band determination unit is interlocked with a security system that provides a security function for the network address translator. The IP address of the Internet telephone terminal can be determined from the IP packet received from the security system.

The VoIP Internet telephony service method according to an embodiment of the present invention comprises an IP band determining unit and a service providing unit, and provides a VoIP internet telephony service method of a VoIP internet telephony service system for providing an internet telephony service based on an IP network. The method of claim 1, further comprising: determining, by the IP band determination unit, an IP band to which the IP address belongs, using the IP address of the Internet telephone terminal; And providing, by the service provider, an internet phone service to the internet phone terminal based on the determined IP band.

In the embodiment of the present invention, determining the IP band includes determining an identification code corresponding to the IP band.

In an embodiment of the present invention, the providing of the Internet telephony service may include allowing or limiting registration of the Internet telephony terminal with respect to the Internet telephony service according to the IP band, and transmitting the information to the originating information according to the IP band. Inserting an identification code of an IP band, requesting a text transmission system to transmit a text message associated with the identification code of the IP band to a called terminal requesting a call connection by the Internet telephone terminal according to the IP band; And setting a display value indicating call type information corresponding to the IP band, and processing the billing for the Internet telephony service according to the IP band.

In an embodiment of the present invention, the Internet phone terminal is in a private network including a network address translation (NAT), and the determining of the IP band may include providing a security free function for the network address translator. The IP address of the Internet telephone terminal can be determined from the SIP message received from the security system in association with the security system.

According to one embodiment of the present invention, by restricting the Internet telephony service based on the IP band, it is possible to prepare for the case where the internet telephony terminal is used abroad for malicious use and to prevent and track damages such as phishing.

According to an embodiment of the present invention, the caller number indicated by the CID (caller display) function of the terminal by transmitting the insertion code (for example, 00281, 00181, 81 0070081, etc.) of the IP band to the called terminal The system allows the called party to recognize international calls easily and conveniently.

According to an embodiment of the present invention, by setting the call type information (for example, national or international) to the call signal by the Internet phone terminal in the IP environment, and transmits to the destination terminal used in the IP environment by sending a separate text Without the system, the called terminal recognizes the call type information and displays "international call" in text that the user can understand, so that the called party can easily and conveniently recognize the international call.

According to an embodiment of the present invention, by using the call type information in the call signal by the Internet phone terminal in the legacy environment (TDM-based) by transmitting to the destination terminal (mobile phone) used in the TDM-based environment, a separate text transmission Without the system, the called terminal recognizes the call type information and displays "international call" in text that the user can understand, so that the called party can easily and conveniently recognize the international call.

According to an embodiment of the present invention, an insertion code of an IP band (for example, 00281, 00181, 81 0070081, etc.) is inserted into a calling number and call type information (overseas, domestic, other) in a call display area in a SIP message. By setting this and transmitting it to the in-network text transmission system, the text transmission system can easily recognize whether it is an international call or a domestic call and apply it to the text transmission.

According to an embodiment of the present invention, an insertion code of an IP band (for example, 00281, 00181, 81 0070081, etc.) is inserted into a calling number, and call type information (overseas, domestic, etc.) is interstation signaling system of PSTN / PLMN. By setting it in the call display area in IAM of (ISUP / No.7) and transmitting it to the relay system, the character processing system of the receiving network can easily recognize whether it is international or domestic and can be applied to transmit text.

According to an embodiment of the present invention, the billing rate for each IP band can be applied by providing an Internet telephone service based on the IP band.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited or limited by the embodiments. Like reference numerals in the drawings denote like elements.

1 and 2 are diagrams for explaining a peripheral configuration of the VoIP Internet telephone service system 100, 200 according to an embodiment of the present invention.

1 and 2, the VoIP Internet phone service system 100, 200 according to an embodiment of the present invention provides an Internet phone service according to VoIP based on the IP network 110, 210, Provides Internet telephony service for Internet telephony terminal based on IP band. Here, the Internet phone terminal encompasses a calling terminal (not shown) and a called terminal 140 or 240 to which the calling terminal requests a call connection.

The VoIP Internet telephony service system 100 (200) determines the IP band to which the IP address belongs by using the IP address of the Internet telephone terminal requesting the Internet telephony service.

As shown in FIG. 1, the VoIP Internet telephone service system 100 is configured to be interoperable with an IP band management server 120 that manages an IP band, so that the IP address of the Internet telephone terminal is IP band management server 120. And the IP band to which the IP address of the Internet telephone terminal belongs from the IP band management server 120.

In addition, as illustrated in FIG. 2, the VoIP Internet telephone service system 200 may secure a function capable of managing an IP band by itself. The VoIP Internet telephone service system 200 may establish a database 230 in which information related to the IP band is stored, and identify from the database 230 an IP band to which the IP address of the Internet telephone terminal belongs.

In addition, the IP band management server 120 and the database 230 maintain a table composed of IP code identification codes associated with the IP band. The identification code table for each IP band may be configured as shown in Table 1. In the identification code of Table 1, 00N of 00186, 00181, and 002976 is an example of a service code of a domestic international telephone business.

IP band Identification code Arc type Remarks 86.0.0.0 86 or 00186 International China 59.0.0.0 81 or 00181 International Japan 187.40.0.0 976 or 002976 International Mongolia 203.233.0.0
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The VoIP Internet telephony service system 100 or 200 according to an embodiment of the present invention may extract an identification code corresponding to the IP band through the IP band management server 120 or the database 230. At this time, the identification code may mean a country-specific identification code, that is, a country code corresponding to the IP band.

One embodiment of the present invention is to provide an Internet telephone service on the basis of the IP band after determining the IP band of the Internet telephone terminal in preparation for the malicious use of the Internet telephone terminal locally, in particular from the domestic to overseas. Can be.

3 is a diagram showing the internal configuration of the VoIP Internet telephone service system according to an embodiment of the present invention.

Referring to FIG. 3, the VoIP Internet telephone service system includes an IP band determination unit 301 and a service provider 300. The service provider 300 may include a terminal register 310, a code inserter 320, a signal processor 330, a text requester 340, and a charging processor 350.

The IP band determination unit 301 determines the IP band to which the IP address belongs by using the IP address of the Internet telephone terminal and determines an identification code corresponding to the determined IP band. As described with reference to FIGS. 1 and 2, the IP band determination unit 301 determines an IP band and an identification code by interworking with the IP band management server 120 or from the database 230 built in the system. The identification code can be determined.

The service provider 300 provides an overall Internet telephony service for the Internet phone terminal based on the IP band determined by the IP band determiner 301. In this case, the terminal registration unit 310 performs a role of allowing or restricting the registration of the Internet telephone terminal for the Internet telephone service according to the IP band. The code insertion unit 320 inserts the identification code of the IP band into the outgoing information displayed on the called terminal that the Internet phone terminal requests to connect to the call according to the IP band. The signal processor 330 sets a display value (for example, an international indicator) indicating call type information corresponding to the IP band to a call signal by the Internet telephone terminal according to the IP band. do. The text request unit 340 serves to request the text transmission system to transmit a text message associated with the identification code of the IP band to the destination terminal to which the Internet phone terminal requests a call connection in connection with the text transmission system. The billing processing unit 350 serves to process billing for the Internet telephony service based on the IP band.

4 is a view for explaining the process of restricting the registration of the Internet phone terminal in the VoIP Internet phone service method according to an embodiment of the present invention, Figure 5 is a VoIP Internet phone service method according to an embodiment of the present invention A diagram for explaining the overall process of providing an Internet telephony service based on an IP band. Here, the VoIP Internet telephony service method according to an embodiment of the present invention can be executed by the VoIP Internet telephony service system shown in FIG.

Referring to Figure 4, VoIP Internet phone service system 400 according to an embodiment of the present invention is a registration request for the Internet phone service from the calling Internet phone terminal (hereinafter referred to as the "calling terminal") 410 Upon reception (S401), the IP band to which the IP address belongs is determined through the IP address of the calling terminal 410, and the identification code of the determined IP band is extracted (S402).

VoIP Internet telephone service system 400 according to an embodiment of the present invention determines whether or not to call restrictions on the IP band determined in the step (S402) (S403). For example, the VoIP Internet telephony service system 400 determines whether the call is restricted for each IP band in advance and determines whether the IP band used by the calling terminal 410 is set to allow or restricted.

VoIP Internet telephony service system 400 according to an embodiment of the present invention may allow or restrict the registration of the calling terminal for the Internet telephony service according to whether or not the call restriction determined in step S403 (S404). In this case, when the IP band is set to allow, the VoIP Internet telephone service system 400 transmits a message that permits registration to the calling terminal 410 as well as allowing registration for the Internet telephone service, and the IP band is limited. If it is set to limit the access to the calling terminal 410 by sending a message that limits the registration to the calling terminal 410.

Therefore, one embodiment of the present invention can limit the registration of the Internet phone terminal based on the IP band.

Referring to FIG. 5, when the VoIP connection service system 500 according to an embodiment of the present invention receives a call connection request for an Internet telephone service from an originating terminal 510 that is permitted to register for an Internet telephone service. After determining the IP band to which the IP address of the calling terminal 510 belongs, the identification code of the determined IP band is extracted (S502).

VoIP Internet telephone service system 500 according to an embodiment of the present invention inserts the identification code of the IP band extracted in the step (S502) to the outgoing information (S503). Here, the calling information may include the calling number as information displayed on the called terminal 530 that the calling terminal 510 requests a call connection. The VoIP Internet telephone service system 500 may insert an arbitrary number necessary for other service networks in addition to the IP network instead of the identification code.

VoIP Internet telephone service system 500 according to an embodiment of the present invention transmits the outgoing information is inserted, the insertion code of the IP band to the destination terminal 530 (S504). For example, if the insertion code of the IP band is China, the Chinese country is inserted into the calling party number (eg, "02-200-1234"), which is the telephone number of the calling terminal, by inserting the Chinese country code (eg, "86"). "International telephone service code +" by inserting the calling code number (eg "86 + 02-200-1234") or the international telephone service code + China country code (eg "001 + 86") The calling party number (eg, "002 + 86 + 02-200-1234") inserted with the "China country code" is transmitted to the called terminal 530. At this time, the called terminal 530 is a caller number (for example, "86 + 02-200-1234") or "international telephone operator code with a Chinese country code inserted so that the called party can easily recognize that the received call is an international call + Country code "(for example," 001 + 86 + 02-200-1234 ") is displayed on the screen.

In addition, the VoIP Internet telephony service system 500 according to an embodiment of the present invention sets call type information corresponding to an international call to the called network when the corresponding IP band is determined to be an international call through an insertion code of the IP band ( S505). That is, the IP band corresponding to the international call is subsequently set to an international indicator indicating an international call in the call signal and transmitted to the called terminal 530. At this time, the called terminal 530 recognizes that the call is an international call from the value set in the call signal received from the VoIP Internet telephone service system 500 to display a notification message (for example, "international call") on the screen. Can be. In particular, according to an embodiment of the present invention, a message for setting call type information may be different according to a network environment. That is, in case of IP environment, call type information is set in a parameter (for example, forward call indicator (FCI)) in call setup message (INVITE), and in case of TDM based legacy environment, call setup message (IAM) Call type information can be set in the FCI, the prescribed parameter. As the call type information, national is used as a display value representing a domestic call and International is used as a display value representing an international call. In particular, when IP-based SIP is used, it may be represented by various other phrases or symbols.

In addition, VoIP Internet phone service system 500 according to an embodiment of the present invention is a text message (for example, "international call") associated with the identification code of the IP band is sent to the destination terminal 530 A character creation and transmission request is made to the transmission system 550 (S506). At this time, the text transmission system 550 composes the text message according to the request of the VoIP Internet telephone service system 500 and transmits the text message to the destination terminal 530. In addition, the called terminal 530 may display the received text message on the screen so that the called party can recognize that the received call is an international call.

The VoIP Internet telephone service system 500 according to an embodiment of the present invention allows the caller terminal 530 to receive the caller terminal 510 (S508) and allows the call through the corresponding IP band to the caller terminal 530. The call connection with the service is processed (S509).

The VoIP Internet telephone service system 500 according to an embodiment of the present invention performs charging based on the IP band to which the IP address of the calling terminal 510 belongs (S510). The VoIP Internet telephone service system 500 adds billing for each IP band. When the IP band is determined to be an international call through an insertion code of the IP band, the VoIP Internet telephone service system 500 processes billing data for the international call.

Accordingly, an embodiment of the present invention may allow the Internet phone service to be limited based on the IP band to which the IP address of the Internet phone terminal belongs, and make an international call to a calling number, a text message, or the like so that the called party can easily recognize the international call. You can include information indicating that it is a phone.

The VoIP Internet telephony service system according to another embodiment of the present invention can process the registration and call processing of the Internet telephony terminal in a private environment. To this end, the VoIP Internet telephone service system includes a mechanism for obtaining an IP address of an Internet telephone terminal using a private network.

Referring to FIG. 6, when the Internet phone terminal directly interworks with the VoIP Internet phone service system 600 in the IP network 610 (I), the URI of the contact header is defined according to the IP network signal (SIP) regulation. It is not a problem to obtain the IP address of the Internet telephone terminal because the IP address is included and transmitted in the host area.

However, there is a security system 660 in which an Internet phone terminal exists in an IP network 610, which is a private network including a network address translation (NAT) 650, and provides a security function for the network address translator 650. In the case of interworking with the VoIP Internet telephony service system 600 (II), the VoIP Internet telephony service system 600 must acquire the IP address D of the actual terminal side including the network address translator 650.

When the network address translator 650 receives a request message for terminal registration or call connection from the Internet phone terminal, the network address translator 650 changes the source IP (E) of the IP packet received from the Internet phone terminal to its own IP address (D). send. The security system 660 enables two-way calling regardless of the security environment of the private network, and also protects key devices in the network by defending against security threats such as DoS attacks and hiding devices in the network. have. For this reason, the IP address that can be collected by the VoIP Internet telephone service system 600 corresponds to the IP address B of the security system 660 or the IP address E of the Internet telephone terminal. However, the VoIP Internet telephone service system 600 must obtain the IP address D of the network address translator 650 for registration and call processing for the Internet telephone terminal. In one embodiment of the present invention, the security system 660 obtains the source IP (D) in the IP packet received from the network address translator 650, and then delivers the IP forwarding parameter for delivering the obtained source IP (D). And transmits the request message of the Internet telephone terminal to the VoIP Internet telephone service system 600 together with the IP forwarding parameter.

Referring to FIG. 7, when the VoIP Internet telephone service system 600 receives a request message for terminal registration or call connection in the security system 660 (S701), whether an IP forwarding parameter exists from the received request message. Determine (S702). If the IP message does not exist in the request message, the VoIP Internet telephone service system 600 recognizes that the Internet telephone terminal is directly interworked without interworking with the security system 660, and includes it in the host area of the URI information of the access header. The received IP address is determined as the IP address of the Internet telephone terminal (S703). Meanwhile, if the IP forwarding parameter is present in the request message, the VoIP Internet telephone service system 600 recognizes that the Internet telephone terminal is interworked through the security system 660, and the IP address D included in the IP forwarding parameter is Internet. It determines with the IP address of a telephone terminal (S704). In addition, the VoIP Internet telephone service system 600 determines the IP band to which the IP address D included in the IP forwarding parameter belongs, and allows or restricts registration and call connection to the Internet telephone terminal according to the determined IP band. Can be.

Therefore, in one embodiment of the present invention, by obtaining the IP address of the actual terminal including the network address translator 650, it is possible to register and call the Internet telephone terminal to the private network.

Embodiments of the present invention include computer readable media including program instructions for performing various computer implemented operations. The computer readable medium may include program instructions, data files, data structures, etc. alone or in combination. The media may be program instructions that are specially designed and constructed for the present invention or may be available to those skilled in the art of computer software. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tape, optical media such as CD-ROMs, DVDs, and magnetic disks, such as floppy disks. Magneto-optical media, and hardware devices specifically configured to store and execute program instructions, such as ROM, RAM, flash memory, and the like. Examples of program instructions include not only machine code generated by a compiler, but also high-level language code that can be executed by a computer using an interpreter or the like.

As described above, the present invention has been described by specific embodiments such as specific components and the like. For those skilled in the art to which the present invention pertains, various modifications and variations are possible.

Therefore, the spirit of the present invention should not be limited to the described embodiments, and all of the equivalents or equivalents of the claims as well as the claims to be described later will belong to the scope of the present invention. .

1 and 2 are diagrams for explaining a peripheral configuration of a VoIP Internet telephone service system according to an embodiment of the present invention.

3 is a diagram showing the internal configuration of the VoIP Internet telephone service system according to an embodiment of the present invention.

4 is a view for explaining a process of restricting the registration of the Internet phone terminal in the VoIP Internet phone service method according to an embodiment of the present invention.

5 is a diagram illustrating a process of providing an Internet telephony service based on an IP band in a VoIP internet telephony service method according to an embodiment of the present invention.

6 is a diagram illustrating a peripheral configuration of a VoIP Internet telephone service system according to another embodiment of the present invention.

7 is a view for explaining a process of determining the IP band of the Internet phone terminal in the private environment in the VoIP Internet phone service method according to another embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

301: IP band determination unit

300: service provider

310: terminal register

320: code insertion unit

330: signal processing unit

340: character request unit

350: billing processing unit

Claims (25)

In the VoIP Internet telephone service system for providing an Internet telephone service according to VoIP, An IP band determination unit that determines an IP band to which the IP address belongs by using an IP address of an Internet telephone terminal; And, A service provider for providing an Internet telephone service to the Internet telephone terminal based on the determined IP band Including, The IP band determination unit, Determine an identification code corresponding to the IP band, The service provider, A code insertion unit for inserting an identification code of the IP band into outgoing information according to the IP band, The originating information is information displayed on the called terminal upon which the Internet telephone terminal requests a call connection, and includes a calling number. delete The method of claim 1, It further includes a database that stores the identification code for each IP band, The IP band determination unit, Extracting an identification code corresponding to the IP band from the database. The method of claim 1, The IP band determination unit, And receiving an identification code of an IP band to which the IP address belongs from the IP band management server after transmitting the IP address to an IP band management server managing an identification code for each IP band. The method of claim 1, The service provider, And a terminal registration section for allowing or restricting registration of the Internet telephone terminal with respect to the Internet telephone service according to the IP band. delete The method of claim 1, The service provider, And a text request unit for requesting a text transmission system to transmit a text message associated with the identification code of the IP band to a called terminal for which the Internet telephone terminal has requested a call connection according to the IP band. The method of claim 1, The service provider, And a signal processing unit for setting a display value indicating call type information corresponding to the IP band to a call signal by the Internet telephone terminal according to the IP band. The method of claim 8, The signal processing unit, In the case of an IP environment, the display value indicating the call type information is set in the parameter in the call setup message, and in the legacy environment, the forward call indicator (FCI), which is a prescribed parameter in the call setup message (IAM), is set. A VoIP internet telephony service system for setting a display value representing the call type information. The method of claim 1, The service provider, And a billing processing unit for processing billing for the internet telephony service according to the IP band. The method of claim 1, The Internet phone terminal is in a private network including a network address translation (NAT), The IP band determination unit, And an IP address of the Internet telephone terminal from the IP packet received from the security system in association with a security system providing a security function for the network address translator. The method of claim 11, The IP packet received from the security system includes an IP forwarding parameter for delivering a source IP of the network address translator. The IP band determination unit, And the source IP as the IP address of the Internet telephone terminal through the IP forwarding parameter. In the VoIP Internet telephony service method of the VoIP Internet telephony service system comprising an IP band determination unit and a service providing unit for providing an Internet telephony service according to VoIP, Determining, by the IP band determination unit, an IP band to which the IP address belongs, using the IP address of the Internet telephone terminal; And, Providing, by the service provider, an internet phone service to the internet phone terminal based on the determined IP band; Including, Determining the IP band, Determining an identification code corresponding to the IP band; Providing the Internet telephone service, Inserting an identification code of the IP band into outgoing information according to the IP band; And the calling information is information displayed on the called terminal upon which the Internet telephone terminal requests a call connection. delete The method of claim 13, The determining of the identification code, And extracting an identification code corresponding to the IP band from a database in which an identification code for each IP band is stored. The method of claim 13, The determining of the identification code, And transmitting the IP address to the IP band management server that manages the identification code for each IP band, and then receiving the identification code of the IP band to which the IP address belongs from the IP band management server. The method of claim 13, Providing the Internet telephone service, Allowing or limiting registration of the internet telephone terminal with respect to the internet telephone service according to the IP band. delete The method of claim 13, Providing the Internet telephone service, Requesting a text transmission system to transmit a text message associated with an identification code of the IP band to a called terminal requesting a call connection by the Internet telephone terminal according to the IP band. The method of claim 13, Providing the Internet telephone service, And setting a display value indicating call type information corresponding to the IP band in a call signal by the Internet telephone terminal according to the IP band. 21. The method of claim 20, Setting the display value indicating the call type information corresponding to the IP band, In case of the IP environment, the display value indicating the call type information is set in the FCI in the call setup message (INVITE); in the legacy environment, the display value indicating the call type information is indicated in the FCI in the call setup message (IAM). How to set up, VoIP Internet telephony service. The method of claim 13, Providing the Internet telephone service, Processing billing for the internet telephony service according to the IP band. The method of claim 13, The Internet phone terminal is in a private network including a network address translator, Determining the IP band, And an IP address of the Internet telephone terminal from the IP packet received from the security system in association with a security system providing a security function for the network address translator. 24. The method of claim 23, The IP packet received from the security system includes an IP forwarding parameter for delivering a source IP of the network address translator. Determining the IP band, And determining the source IP as the IP address of the Internet telephone terminal through the IP forwarding parameter. A computer-readable recording medium having recorded thereon a program for performing the method of any one of claims 13, 15-17 and 19-24.

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