JP4289012B2 - IP telephone supplementary service provision method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for providing an IP telephone supplementary service, and particularly in an IP telephone service using an IP network, by temporarily authenticating via a service provider from a DNS server search result, The present invention relates to a method for providing an IP telephone additional service that enables an IP telephone additional service to be performed without being limited to a service menu.
[0002]
[Prior art]
When an IP telephone service is realized using an IP network, searching for an IP address from a telephone number using the DNS function is a means for connecting to various destinations on the IP network. As an example of the connection means, Patent Documents 1 and 2 describe that when a telephone connected to a telephone network is used to make a call to an IP telephone, the telephone number of the connection destination is converted into an IP address on the way, and the other party's IP telephone The technical contents that make it possible to connect to are described.
[0003]
FIG. 4 shows a system configuration diagram of an IP network system that provides an IP telephone service using the connection means. Referring to FIG. 4, the conventional system connects to the gateway 211 when the exchange 230 of the telephone network 220 identifies that the telephone number dialed from the terminal 215 is an IP telephone number, and the gateway 211 connects the telephone number to the domain name. And the DNS server 212 is searched. The DNS server 212 returns the URI to the gateway 211, and the gateway 211 acquires the IP address and port number of the corresponding SIP server 213 based on the URI, and routes to the SIP server 213 according to the address and port number. The SIP server 213 implements a call by routing to the corresponding terminal 214. However, there have been the following problems.
[0004]
First, in realizing a new additional service using IP technology, service providers that can provide the service are limited to communication carriers having a network for IP telephone service.
In addition, users who can receive the service are limited to users who are connected to the communication carrier and subscribe to an ISP that provides an IP telephone service.
[0005]
Next, we will explain the problems with the services provided on the conventional public network. First, regarding toll-free services, dedicated toll-free dials are prepared, and all incoming calls from unspecified majority are charged. End up. This makes it impossible to make a toll-free call from a specific person.
In addition, when there is no response to incoming calls from an unspecified number, there are services that connect to the answering service, but it is not possible to connect only from other than a specific person to the answering service. As described above, the additional service cannot be implemented by a combination of the caller and the callee.
[0006]
[Patent Document 1]
JP 2002-237907 A
[Patent Document 2]
JP 2002-252655 A
[0007]
[Problems to be solved by the invention]
In view of the above points, the present invention provides services to any desired subscriber, even a telecommunications carrier that does not have facilities for interconnecting an existing telephone network and an IP network or a service carrier that does not have a contract subscriber. It is an object of the present invention to provide an IP telephone additional service providing method that can be provided.
[0008]
It is another object of the present invention to provide a method for providing an IP telephone supplementary service that allows a subscriber who has contracted with a certain ISP to continue the contract and receive services of other operators if there is a service he / she likes. .
[0009]
It is another object of the present invention to provide an IP telephone additional service providing method capable of implementing an additional service for each subscriber (a combination of a callee, a caller, and a caller).
[0010]
[Means for Solving the Problems]
In order to solve such an object, the invention described in claim 1 includes an application server having first storage means for storing IP telephone service information representing an IP telephone service, a first SIP server, and an IP telephone service. Uses IP telephone service by having a second storage means for storing service usage conditions of users to be used and a management server for managing the service usage status of each user by having an authentication means for authenticating users. A server system for providing information to the user, and the DNS server, the IP communication terminal of the user, and the second SIP server are each connected to the IP network to transmit and receive IP telephone service information. An IP network system is formed, and the server system and the DNS server are interconnected so that the user can Unlike IP telephone service that can be utilized in connection with an additional IP telephone service information of a server system, the IP communication terminal Offer The first SIP server transmits authentication request information representing a user authentication request to the management server, and the management server includes the first SIP server. A second step of receiving authentication request information from the server, wherein the authentication means outputs the authentication approval result by referring to the service usage conditions of the subscriber from the second storage means, and transmits the authentication approval result to the application server; The application server receives the authentication approval result from the management server, and refers to the IP telephone service information from the first storage means, and the first SIP server searches the DNS server to obtain the second SIP A fourth step of routing to the server; , D Via NS server Provided by application server And a fifth step of transmitting IP telephone service information to the IP communication terminal.
[0011]
The invention according to claim 2 is the invention according to claim 1, wherein the connection means for interconnecting networks of different protocol types and the communication terminal of the caller are each connected to a telephone network, A telephone network system for transmitting / receiving predetermined information to / from an IP network is formed, and the telephone network and the IP network are interconnected by a connection means. A method for providing an IP telephone additional service when a call is made to a terminal, wherein the connection means converts a telephone number sent from the communication terminal into a domain name, searches the DNS server, and the first SIP server Before the first step is performed.
[0012]
According to a third aspect of the present invention, in the first aspect of the present invention, an IP communication terminal possessed by a caller is connected to the IP network, and forms an IP network system for transmitting and receiving IP telephone service information. An IP telephone supplementary service providing method when a call is made from a caller's IP communication terminal to a user's IP communication terminal, wherein the second SIP server searches the DNS server, and A step of routing the first SIP server is provided before performing the first step.
[0013]
The invention according to claim 4 is the invention according to any one of claims 1 to 3, wherein the DNS server, the second IP communication terminal of the user, and the third SIP server are respectively 2 is connected to the IP network, forming a second IP network system for transmitting and receiving IP telephone service information, and the second IP network system and the IP network system are interconnected, Unlike an IP telephone service that a user can use by connecting to an IP network, an IP telephone additional service providing method when additional IP telephone service information possessed by the server system is transmitted to the second IP communication terminal In the fifth step, the application server sends the IP telephone service information to the IP communication terminal via the DNS server. The first SIP server searches for the DNS server and routes to the third SIP server when the first server cannot communicate, and the application server receives the IP telephone service information via the DNS server. Transmitting to the second IP communication terminal.
[0014]
According to a fifth aspect of the present invention, in the invention according to any one of the first to fourth aspects, the IP telephone service is an incoming call rejection service, and the IP telephone service information is an incoming call that represents an incoming call rejection service. It is rejected service information.
[0015]
The invention according to claim 6 is the invention according to any one of claims 1 to 4, wherein the IP phone service is a toll-free service, and the IP phone service information is a toll-free service representing a toll-free service. It is dial service information.
[0016]
According to a seventh aspect of the present invention, in the invention according to any one of the first to fourth aspects, the IP telephone service is a chasing telephone service, and the IP telephone service information is a chasing indicating a chasing telephone service. It is telephone service information.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0018]
<Configuration of Embodiment 1>
With reference to FIG. 1, a system configuration for realizing the IP telephone supplementary service providing method by the service provider 100 will be described.
[0019]
Referring to FIG. 1, the system according to the first embodiment includes an IP terminal 10 used by an IP telephone service user, a terminal 20 used by a caller, a DNS server 30, a gateway 50, and an IP having a terminal 10. The IP network 110 to which the telephone service user belongs, the SIP server 70 set in the IP network 110, the existing telephone network 120 to which the terminal 20 belongs, the existing exchange 130, the service provider 100 that provides the service, and the service It comprises a SIP server 60 installed by the business operator 100, a subscriber management server 40, and an application server 80.
[0020]
The IP terminal 10 is a device that realizes voice communication using an IP network such as a personal computer or a device that enables voice communication by combining a terminal adapter that can connect an existing telephone and an existing phone.
[0021]
The terminal 20 is a normal telephone.
[0022]
The gateway 50 has a function of interconnecting the existing telephone network 120 and the IP network 110, a function of converting a telephone number into a domain name, and a function of searching the DNS server 30.
[0023]
The DNS server 30 has a function of returning a URI, an IP address, and a port number corresponding to the domain name to the inquiry destination.
[0024]
The SIP server 60 has a function of routing to the SIP server 70 and a function of searching the DNS server 30.
[0025]
The SIP server 70 has a function of routing to the IP terminal 10 and a function of searching the DNS server 30.
[0026]
The subscriber management server 40 has a function of authenticating a subscriber and a function of determining the necessity of service provision and the type of service to be provided by a combination of a caller and a callee based on the authentication result.
[0027]
The application server 80 has a function of executing various services.
[0028]
<Operation of Embodiment 1>
Next, an operation process of the IP telephone supplementary service providing method by the service provider 100 will be described with reference to FIG.
[0029]
In FIG. 1, an IP telephone service user who uses the IP terminal 10 makes a service use application to the service provider 100. The service provider 100 registers so that its own URI is paid out from the DNS server 30. Further, authentication settings for service users, service contents, and service provision conditions are set in the subscriber management server 40.
[0030]
When the caller makes a call to the IP telephone service user's IP terminal 10 using the terminal 20, the DNS server 30 is searched, and the DNS server 30 returns the URI of the service provider 100 to the gateway 50. The gateway 50 acquires the IP address and port number of the SIP server 60 of the service provider 100 based on the URI, and routes to the SIP server 60 according to the address and port number. The SIP server 60 refers to the registered contents of the subscriber management server 40. If the authentication is OK, the application server 80 provides the corresponding service.
[0031]
In FIG. 1, a subscriber who uses the terminal 10 has a contract with an ISP having an IP network 110 and receives a service at a monthly fee. When a subscriber who uses the terminal 10 wants to receive a service provided by the service provider 100 that does not own the facility interconnected with the IP network 110, the subscriber pays a monthly fixed amount or a metered service fee to the ISP having the IP network 110. .
[0032]
An ISP having an IP network 110 once sets the DNS server 30 so as to pass through the service provider 100 and collects a service fee provided by the service provider 100 from a subscriber who uses the terminal 10. Thus, the service provider 100 obtains a percentage of the payment paid by the subscriber using the terminal 10.
[0033]
Accordingly, since the service provider 100 has the ISP collect the fee collection from the subscriber, the operation cost can be reduced and the efficiency of its own operation can be reduced, and the ISP can obtain a new fee income. .
[0034]
<Example 1 of Embodiment 1>
With reference to FIG. 1 in Embodiment 1, the operation | movement of the Example of the incoming call rejection service which the service provider 100 provides is demonstrated in detail.
[0035]
Referring to FIG. 1 in the IP telephone service using the IP network, the IP telephone service user using the terminal 10 applies to the service provider 100 for use of the incoming call rejection service. The service provider 100 registers the URI to be issued from the DNS server 30 as a search result addressed to the IP terminal 10.
[0036]
Further, the IP telephone service user who uses the IP terminal 10 in the subscriber management server 40 registers that he / she subscribes to the incoming call rejection service. Also, a number that permits incoming calls is registered, and if not registered, it is set to connect to an answering machine. It is assumed that the number of the terminal 20 is not permitted.
[0037]
When the terminal 20 makes a call to the IP terminal 10, the DNS server 30 is searched, and the DNS server 30 returns the URI of the service provider 100 to the gateway 50. The gateway 50 acquires the IP address and port number of the SIP server 60 of the service provider 100 based on the URI, and routes to the SIP server 60 according to the address and port number.
[0038]
The SIP server 60 refers to the registered content of the subscriber management server 40, and when authentication is successful, the process is transferred to the application server 80. It can be seen that the application server 80 needs to search for the type of service and provide an incoming call rejection service. Further, it recognizes that the incoming call from the terminal 20 is rejected, and is connected to the answering service of the application server 80.
[0039]
<Example 2 of Embodiment 1>
Next, with reference to FIG. 1 in Embodiment 1, the operation | movement of the Example of the free dial service which the service provider 100 provides is demonstrated in detail.
[0040]
Referring to FIG. 1 in the IP telephone service using the IP network, the IP telephone service user using the terminal 10 applies to the service provider 100 for using the free dial service. It is assumed that the service provider 100 has a toll-free number.
[0041]
A service user who uses the IP terminal 10 in the subscriber management server 40 registers that he / she subscribes to the free dial service. Further, it is set that the toll-free service is provided when the caller number is the number of the terminal 20.
[0042]
When the terminal 20 makes a call to the toll-free service number of the service provider 100, the DNS server 30 is searched, and the DNS server 30 returns the URI of the service provider 100 to the gateway 50. The gateway 50 acquires the IP address and port number of the SIP server 60 of the service provider 100 based on the URI, and routes to the SIP server 60 according to the address and port number. After connecting to the SIP server 60, the terminal 20 dials the IP terminal 10.
[0043]
The SIP server 60 refers to the registered contents of the subscriber management server 40. If the authentication is OK, the SIP server 60 routes to the SIP server 70 according to an instruction from the application server 80. The SIP server 70 calls the IP phone 10.
[0044]
<Configuration of Embodiment 2>
Further, another example of the system configuration for realizing the IP telephone supplementary service providing method by the service provider 100 will be described with reference to FIG.
[0045]
Referring to FIG. 2, the system of the second embodiment includes an IP terminal 10 used by an IP telephone service user at home, a terminal 20 used by a caller, a DNS server 30, a gateway 50, and a terminal 10. An IP network 110 to which an IP telephone service user has, an SIP server 70 set in the IP network 110, an existing telephone network 120 to which the terminal 20 belongs, an existing switch 130, and a service provider 100 that provides services SIP server 60 installed by service provider 100, subscriber management server 40, application server 80, IP terminal 11 used by the IP telephone service user in the company, IP network 140 to which terminal 11 belongs, and IP network The SIP server 90 is installed in 140.
[0046]
The IP terminals 10 and 11 are devices that realize voice communication using an IP network such as a device that enables voice communication by combining an existing telephone and a terminal adapter that can connect the existing phone, or a personal computer.
[0047]
The terminal 20 is a normal telephone.
[0048]
The gateway 50 has a function of interconnecting the existing telephone network 120 and the IP network 110, a function of converting a telephone number into a domain name, and a function of searching the DNS server 30.
[0049]
The DNS server 30 has a function of returning a URI, an IP address, and a port number corresponding to the domain name to the inquiry destination.
[0050]
The SIP server 60 has a function of routing to the SIP server 70 and the SIP server 90 and a function of searching the DNS server 30.
[0051]
The SIP server 70 has a function of routing to the IP terminal 10 and a function of searching the DNS server 30.
[0052]
The SIP server 90 has a function of routing to the IP terminal 11 and a function of searching the DNS server 30.
[0053]
The subscriber management server 40 has a function of authenticating a subscriber and a function of determining the necessity of service provision and the type of service to be provided by a combination of a caller and a callee based on the authentication result.
[0054]
The application server 80 has a function of executing various services.
[0055]
<Operation of Embodiment 2>
Next, the operation processing of the IP telephone additional service providing method performed by the service provider 100 will be described with reference to FIG. Explained.
[0056]
Referring to FIG. 2 in the IP telephone service using the IP network, the IP telephone service user using the IP terminal 10 follows the service provider 100 and applies for use of the telephone service. As the calling order, the first call is registered with the company IP terminal 11 and the second call is registered with the home IP terminal 10. The service provider 100 registers such that when the DNS server 30 is searched as a search result addressed to the IP terminal 10, its own URI is paid out.
[0057]
Further, the service user who uses the IP terminal 10 registers in the subscriber management server 40 that he / she subscribes to the chasing telephone service. In addition, all caller numbers that provide the chase call service are registered to call in the order of company and home.
[0058]
When an arbitrary caller makes a call to an IP telephone service user, when the exchange 130 of the existing telephone network 120 identifies that the dialed telephone number is an IP telephone number, the telephone 50 connects to the gateway 50, and the gateway 50 connects the telephone number to the domain. The name is converted and the DNS server 30 is searched.
[0059]
The DNS server 30 returns the URI of the service provider 100 to the gateway 50. The gateway 50 searches the DNS server 30 based on the URI, finally acquires the IP address and port number of the SIP server 60 of the service provider 100, and routes to the SIP server 60 according to the address and port number.
[0060]
The SIP server 60 refers to the registered content of the subscriber management server 40, and when authentication is successful, the process is transferred to the application server 80. It can be seen that the application server 80 needs to search for the type of service and provide a chase telephone service. Recognizing that the service is provided regardless of the caller ID, the application server 80 knows that the company IP telephone 11 is registered as the first call number. In response to an instruction from the application server 80, the SIP server 60 searches the DNS server 30 and routes to the SIP server 90.
[0061]
The SIP server 90 calls the company IP telephone 11. If no incoming call is made, the application server 80 instructs the SIP server 60 to call the home IP phone 10 registered for the second call. The SIP server 60 routes to the SIP server 70, and the SIP server 70 calls the IP phone 10.
[0062]
In FIG. 2, a subscriber who uses the terminal 10 has a contract with an ISP having the IP network 110 and receives a service at a monthly fee. When a subscriber who uses the terminal 10 wants to receive a service provided by the service provider 100 that does not own the facility interconnected with the IP network 110, the subscriber pays a monthly fixed amount or a metered service fee to the ISP having the IP network 110. .
[0063]
An ISP having an IP network 110 once sets the DNS server 30 so as to pass through the service provider 100 and collects a service fee provided by the service provider 100 from a subscriber who uses the terminal 10. Thus, the service provider 100 obtains a percentage of the payment paid by the subscriber using the terminal 10.
[0064]
Accordingly, since the service provider 100 has the ISP collect the fee collection from the subscriber, the operation cost can be reduced and the efficiency of its own operation can be reduced, and the ISP can obtain a new fee income. .
[0065]
In the system configuration of the second embodiment, it is possible to apply the service provider's incoming call rejection service and toll-free service as described in the first and second embodiments of the first embodiment.
[0066]
<Configuration of Embodiment 3>
Next, another example of the system configuration for realizing the IP telephone supplementary service providing method by the service provider 100 will be described with reference to FIG. 3 when the calling side uses the IP network instead of the existing telephone network.
[0067]
Referring to FIG. 3, the system according to the third embodiment includes an IP terminal 310 used at home by an IP telephone service user, an IP terminal 320 used by a caller, a DNS server 330, and terminals 310 and 320. IP network 110 to which the IP telephone service user belongs, SIP server 370 set in IP network 110, service provider 400 that provides service, SIP server 360 installed by service provider 400, and subscriber management The server 340, the application server 380, the IP terminal 311 used by the IP telephone service user in the company, the IP network 140 to which the terminal 311 belongs, and the SIP server 390 installed in the IP network 140 are configured.
[0068]
The IP terminals 310, 311, and 320 are devices that realize voice communication using an IP network such as a device that enables voice communication by combining an existing telephone and a terminal adapter that can be connected to the existing phone, or a personal computer.
[0069]
The DNS server 330 has a function of returning a URI, an IP address, and a port number corresponding to the domain name to the inquiry destination.
[0070]
The SIP server 360 has a function of routing to the SIP server 370 and the SIP server 390 and a function of searching the DNS server 330.
[0071]
The SIP server 370 has a function of routing to the IP terminal 310 and a function of searching the DNS server 330.
[0072]
The SIP server 390 has a function of routing to the IP terminal 311 and a function of searching the DNS server 330.
[0073]
The subscriber management server 340 has a function of authenticating a subscriber and a function of determining the necessity of service provision and the type of service to be provided by a combination of a caller and a callee based on the authentication result.
[0074]
The application server 380 has a function of executing various services.
[0075]
<Operation of Embodiment 3>
Next, the operation processing of the IP telephone supplementary service providing method by the service provider 400 will be described with reference to FIG. 3. In particular, the chasing telephone service of the service provider 400 is taken as an example, and the operation of the embodiment is described in detail. Explained.
[0076]
Referring to FIG. 3 in the IP telephone service using the IP network, the IP telephone service user using the IP terminal 310 follows the service provider 400 and applies for use of the telephone service. As a calling order, the first call is registered with the company IP terminal 311, and the second call is registered with the home IP terminal 310. The service provider 400 registers such that when the DNS server 330 is searched as a search result addressed to the IP terminal 310, its own URI is paid out.
[0077]
Further, the service user who uses the IP terminal 310 registers in the subscriber management server 340 that he / she subscribes to the chasing telephone service. In addition, all caller numbers that provide the chase call service are registered to call in the order of company and home.
[0078]
When an arbitrary caller makes a call from the IP terminal 320 to the IP terminal 310, the DNS server 330 is searched.
[0079]
The DNS server 330 returns the URI of the service provider 400 to the IP terminal 320. The IP terminal 320 searches the DNS server 330 based on the URI, finally acquires the IP address and port number of the SIP server 360 of the service provider 400, and routes to the SIP server 360 according to the address and port number.
[0080]
The SIP server 360 refers to the registered content of the subscriber management server 340, and when authentication is successful, the processing is transferred to the application server 380. It can be seen that the application server 380 needs to search for the type of service and provide a chase telephone service. Recognizing that the service is provided regardless of the caller ID, the application server 380 knows that the company IP phone 311 is registered as the first call number. In response to an instruction from the application server 380, the SIP server 360 searches the DNS server 330 and routes to the SIP server 390.
[0081]
The SIP server 390 calls the company IP phone 311. If the incoming call is not made, application server 380 instructs SIP server 360 to call home IP phone 310 registered for the second call. The SIP server 360 routes to the SIP server 370, and the SIP server 370 calls the IP phone 310.
[0082]
In FIG. 3, a subscriber who uses the terminal 310 is contracted with an ISP having the IP network 110 and receives a service at a monthly fee. When a subscriber who uses the terminal 310 wants to receive a service provided by the service provider 400 that does not own the facility interconnected with the IP network 110, the subscriber pays a monthly flat rate or a pay-per-use service fee to the ISP having the IP network 110. .
[0083]
The ISP having the IP network 110 once sets the DNS server 330 so as to pass through the service provider 400 and collects the service fee provided by the service provider 400 from the subscriber using the terminal 310. Thus, the service provider 400 obtains a percentage of the payment paid by the subscriber using the terminal 310.
[0084]
Accordingly, since the service provider 400 has the ISP collect the fee collection work from the subscriber, the operation cost can be reduced and the efficiency of its own job can be reduced, and the ISP can obtain new fee income. .
[0085]
In the system configuration of the third embodiment, the service provider's incoming call rejection service and toll-free service as described in the first and second embodiments of the first embodiment can be applied.
[0086]
【The invention's effect】
From the above description, the present invention provides the following effects.
[0087]
The first effect is that it is possible to provide services to any desired subscriber, even a telecommunications carrier that does not have facilities for interconnecting an existing telephone network and an IP network or a service carrier that does not have a contract subscriber. .
[0088]
The second effect is that a subscriber who has contracted with an ISP can continue to receive the service of another business if there is a service he / she likes while continuing the contract.
[0089]
A third effect is that an additional service can be implemented for each subscriber (a combination of a callee, a caller, and a caller).
[Brief description of the drawings]
FIG. 1 is a system configuration diagram of an IP network system that performs an IP telephone supplementary service providing method according to a first embodiment.
FIG. 2 is a system configuration diagram of an IP network system that performs an IP telephone supplementary service providing method according to a second embodiment;
FIG. 3 is a system configuration diagram of an IP network system that performs the IP telephone supplementary service providing method according to the third embodiment.
FIG. 4 is a system configuration diagram of an IP network system that provides a conventional IP telephone service.
[Explanation of symbols]
10, 11, 20, 310, 311, 320, 214, 215 terminal
120, 220 telephone network
130, 230 exchange
110, 140 IP network
50, 211 gateways
70, 90, 370, 390, 213 STP server
30, 330, 212 DNS server
100, 400, 220 Service provider
40, 340 Subscriber management server
80, 380 Application server
60, 360 STP server

Claims (7)

An application server having first storage means for storing IP telephone service information representing an IP telephone service, a first SIP server, and second storage means for storing service usage conditions of a user who uses the IP telephone service And a management server that manages the service usage status of each user by having an authentication means for authenticating the user, and forms a server system for providing IP telephone service to the user,
The DNS server, the IP communication terminal of the user, and the second SIP server are each connected to the IP network, and form an IP network system for transmitting and receiving IP telephone service information.
The server system and DNS server are interconnected
Unlike an IP telephone service that a user can use by connecting to an IP network, an additional IP telephone service information provided in a server system is provided to an IP communication terminal. ,
A first SIP server for transmitting authentication request information representing a user authentication request to the management server;
The management server receives the authentication request information from the first SIP server, the authentication unit outputs the authentication approval result by referring to the service use condition of the subscriber from the second storage unit, and the authentication approval result is output to the application server. A second step of transmitting to
The application server receives the authentication approval result from the management server, and refers to the IP telephone service information from the first storage means;
A first SIP server searching for a DNS server and routing to a second SIP server;
And a fifth step of transmitting IP telephone service information provided by the application server to the IP communication terminal via the DNS server. The connection means for interconnecting networks of different protocol types and the communication terminal of the caller are each connected to the telephone network, and form a telephone network system for transmitting and receiving predetermined information to and from the IP network. And
The telephone network and the IP network are interconnected by connection means,
An IP telephone supplementary service providing method when a call is made from a communication terminal of a caller to the IP communication terminal of a user,
The connection means has a step of converting a telephone number transmitted from a communication terminal into a domain name, searching for the DNS server, and routing the first SIP server before performing the first step. The method for providing an IP telephone additional service according to claim 1. An IP communication terminal of the caller is connected to the IP network, and forms an IP network system for transmitting and receiving IP telephone service information.
An IP telephone supplementary service providing method when a call is made from a caller's IP communication terminal to a user's IP communication terminal,
2. The IP telephone addition according to claim 1, wherein the second SIP server has a step of searching for the DNS server and routing the first SIP server before performing the first step. 3. Service provision method. The DNS server, the second IP communication terminal of the user, and the third SIP server are each connected to the second IP network, and a second IP network system for transmitting and receiving IP telephone service information Forming
The second IP network system and the IP network system are interconnected;
Unlike an IP telephone service that a user can use by connecting to an IP network, an IP telephone additional service providing method when additional IP telephone service information possessed by the server system is transmitted to the second IP communication terminal Because
In the fifth step, when the application server cannot transmit the IP telephone service information to the IP communication terminal via the DNS server,
The first SIP server searches for the DNS server and routes to a third SIP server;
4. The IP telephone addition according to claim 1, wherein the application server includes a step of transmitting IP telephone service information to a second IP communication terminal via the DNS server. 5. Service provision method. The IP telephone service is an incoming call rejection service,
5. The method for providing an IP telephone additional service according to claim 1, wherein the IP telephone service information is incoming call rejection service information representing an incoming call rejection service. The IP telephone service is a toll-free service,
5. The IP telephone additional service providing method according to claim 1, wherein the IP telephone service information is free dial service information representing a free dial service. The IP phone service is a chasing phone service;
5. The IP telephone additional service providing method according to claim 1, wherein the IP telephone service information is chasing telephone service information representing a chasing telephone service.

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