KR20010000599A - Communication system and telephone call service method for providing inexpensive telephone call service using internet VoIP network - Google Patents

Abstract

PURPOSE: A method for supplying low-charge services is provided to use an internet voice over internet protocol(VOIP) network to supply call services, even when subscribers receive calls. CONSTITUTION: More than one subscriber private line receives calls originated from subscribers. More than one subscriber call processing exchange transmits the received calls including a predetermined subscriber ID to a subscriber private line corresponding to the subscriber ID, and receives a call transmitted from the subscriber private line. More than one relay exchange receives calls transmitted from a predetermined subscriber call processing exchange and an internet voice over internet protocol(VOIP) network. If the received calls include predetermined service IDs, the more than relay exchange perceives subscriber IDs among incoming numbers of the received calls, and connects the received calls with a subscriber call processing exchange for managing the subscriber IDs. If the incoming numbers do not include the service IDs, the relay exchanges transmit the received calls to the internet VOIP network. A service ID processor receives the calls transmitted to the internet VOIP network from the relay exchanges and a public switched telephone network(PSTN), and perceives service IDs of incoming numbers of the received calls, then transmits the calls to the corresponding relay exchanges. An internet VOIP network ID processor receives calls originated from non-registered subscribers. If incoming numbers of the non-registered subscribers include an ID of the internet VOIP network, the internet VOIP network ID processor transmits the calls of the non-registered subscribers to the internet VOIP network.

Description

[Communication system and telephone call service method for providing inexpensive telephone call service using internet network]

TECHNICAL FIELD The present invention relates to telecommunication services, and more particularly, to telecommunication systems that enable nationwide telephony and additional telecommunication services at low rates.

Recently, due to the development of the Internet network and the Internet technology, a lot of Internet phone services have been provided to enable phone calls using the Internet network. Call service using the Internet has the advantage that there is no fee or inexpensive. One method of receiving a call service using such an internet network is to include an Internet phone program, a microphone, etc. in a personal computer (PC) accessible to the Internet, and to make a call by driving an Internet phone program. Alternatively, there is a method of receiving a call service by connecting to a specific web site that provides an Internet phone service using a PC that can access the Internet. However, this method requires additional installation in addition to the existing telephone, and has a disadvantage in that the user interface is inconvenient for a telephone user who is used to using a regular telephone.

An improved Internet phone service than the above-described case is a service using an existing general telephone. However, even in the case of an Internet phone service using an existing phone as it is, with a separate Internet phone gateway access number and subscriber identification number, the Internet phone gateway identification number is first dialed, and the subscriber ID number is again accessed. Complex procedures such as typing them are required. Therefore, this case also has a disadvantage in that it is inconvenient for general users to use. In addition, in the case of the conventional Internet phone service, the service fee is low when the Internet phone service subscriber makes a call, but the Internet phone service is not provided when the general subscriber makes an incoming call to the Internet phone service subscriber. There is a disadvantage that is not cheap.

The technical problem to be achieved by the present invention is easy to use, and the service fee is low by providing a call service using the Internet Voice over Internet Protocol (VoIP) network when the subscriber of the service is not only sent but also received by the subscriber. It is to provide a communication system and a method for providing a nationwide call service.

1 is a block diagram of a communication system according to an embodiment of the present invention.

2 is a view showing a specific example using the Internet VoIP network of Hanaro communication as another embodiment of a communication system according to the present invention.

3A is a flowchart illustrating a process of processing a subscriber call signal in the communication system of FIG. 2.

3B is a flowchart illustrating a process of processing a subscriber call in the communication system of FIG. 2.

One aspect of the present invention for achieving the above technical problem relates to a communication system for providing a call service using the Internet network. The communication system of the present invention is a kind of the Internet network, which transmits voice data using an Internet protocol and has an Internet VoIP network having a predetermined identification number; At least one subscriber line, each receiving a call originating from a corresponding subscriber; One or more subscriber call processing exchanges that transmit and receive a call including a predetermined subscriber identification number to a subscriber line corresponding to the subscriber identification number, and receive and process a call transmitted from the subscriber line; Receiving a call transmitted from a predetermined subscriber call processing exchange of the one or more subscriber call processing exchanges and the Internet VoIP network, and if the called number of the received call includes a predetermined service identification number, among the called numbers of the received call. Identify the subscriber identification number and connect the received call to a subscriber call processing exchange in charge of processing the subscriber identification number, and if the called number of the received call does not include a predetermined service identification number, One or more relay exchanges to transmit the received call; A service identification number processing unit for receiving a call transmitted from the at least one relay switch and a public telephone switching network to the Internet VoIP network, grasping the service identification number of the called number of the received call, and transmitting the received call to the corresponding relay switch. ; An Internet VoIP network identification number processing unit for transmitting the non-subscriber outgoing signal to the Internet VoIP network if the incoming number of the non-subscriber originating call includes the identification number of the Internet VoIP network. It is characterized by. Preferably, the identification number of the Internet VoIP network is 030, and the call service is a single rate nationwide.

Another aspect of the present invention for achieving the above technical problem is a kind of Internet network, transmits voice data using the Internet protocol, and provides a call service at a single rate nationwide using the Internet VoIP network having a predetermined identification number The present invention relates to a call service providing method in a communication system. The present invention provides a call service providing method comprising: receiving a call originating from a corresponding subscriber by using at least one subscriber line; Transmitting and receiving a call including a predetermined subscriber identification number to a subscriber line corresponding to the subscriber identification number by using one or more subscriber call processing exchanges, and receiving and processing a call transmitted from the subscriber line. ; Receiving a call transmitted from a predetermined subscriber call processing exchange of the one or more subscriber call processing exchanges and the Internet VoIP network by using one or more relay exchanges, and if the called number of the received call includes a predetermined service identification number, Identify a subscriber identification number of the called number of the received call and connect the received call to a subscriber call processing exchange in charge of processing the subscriber identification number, and if the called number of the received call does not include the service identification number Transmitting the received call to the Internet VoIP network; Receives a call transmitted from the at least one relay switch and a public telephone switching network to the Internet VoIP network with a service identification number processing unit, grasps the service identification number of the called number of the received call and sends the received call to the corresponding relay switch. Transmitting; An Internet VoIP network identification number processing unit and receiving a call originating from a non-subscriber, and if the called number of the non-subscriber outgoing call includes the identification number of the VoIP network, the non-subscriber outgoing signal is transmitted to the Internet VoIP network. Characterized in that it comprises a step. Preferably, the identification number of the Internet VoIP network is 030.

Another aspect of the present invention for achieving the above technical problem is a kind of Internet network, and transmits voice data using the Internet protocol, and provides a call service using the Internet VoIP network having a predetermined identification number will be. The present invention provides a call service providing method comprising the steps of: (a) assigning a subscriber a number including an Internet VoIP network identification number, a carrier identification number, and a subscriber identification number, which are identification numbers of the Internet VoIP network; (b) a subscriber outgoing signal processing step of receiving a call originating from the subscriber through a predetermined subscriber dedicated line and connecting to a called number of the subscriber outgoing call; And (c) a non-subscriber call signal processing step of receiving a call originating from a party other than the subscriber (non-subscriber) and connecting to a called number of the non-subscriber call signal, wherein the subscriber call signal of step (b) is performed. The processing step may include (b1) determining whether the called party number of the subscriber calling signal includes a predetermined service identification number; (b2) if the called party number of the subscriber calling signal includes the service identification number, grasps the subscriber identification number of the called party number of the non-subscriber calling signal, and connects the subscriber calling signal through a subscriber dedicated line corresponding to the subscriber identification number; Making; And (b3) if the called number of the subscriber calling signal does not include the service identification number, connecting the subscriber calling signal through the Internet VoIP network, and the non-subscriber calling signal processing step of (c). (C1) if the called number of the non-subscriber originating signal includes the Internet VoIP network identification number, transmitting the non-subscriber outgoing signal to the Internet VoIP network; And (c2) if the called party number of the non-subscriber caller includes the service identification number, grasps the subscriber identification number of the called party number of the non-subscriber caller, and sends the non-subscriber through a subscriber line corresponding to the subscriber identification number. Connecting the call. The service identification number is characterized in that it comprises the carrier identification number. Preferably, the call service is a single rate nationwide.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the present specification, for the convenience of description, signals performing the same role through the drawings are denoted by the same reference numerals.

1 is a block diagram of a communication system according to an embodiment of the present invention. Referring to this, the communication system of the present invention includes a subscriber line 10, an exchange system 30, an Internet VoIP network 40, a service identification number processing unit 42, and an Internet VoIP network identification number processing unit 94. Specifically, the switching system 30 includes a subscriber call processing exchange 31, an additional service processing unit 32, and a relay exchange 33. The Internet VoIP network 40 is a kind of Internet network, which transmits voice data using the Internet Protocol, and has a predetermined identification number. This identification number is called the Internet VoIP network identification number.

In addition, subscriber 70, who is a member who subscribes as a member to receive a communication service using the communication system of the present invention, is assigned a number having a system of 'Internet VoIP network identification number-communication provider identification number-subscriber identification number'. As described above, the Internet VoIP network identification number is a number assigned to identify the Internet VoIP network 40 and is, for example, '030'. The service provider identification number is a number assigned to each service provider to identify a plurality of service providers using the Internet VoIP network 40. Therefore, a predetermined carrier identification number is also assigned to the communication system according to the present invention, for example, '344'.

Subscriber line 10 receives each call originating from the corresponding subscriber 70 and transmits it to the subscriber call processing exchange 31, and receives the call received from the relay exchange 33, including the predetermined subscriber identification number. Transfer to subscriber-only line 10 corresponding to the identification number.

The relay switch 33 relays calls received from the subscriber call processing switch 31 and the Internet VoIP network 40 connected thereto. The relay exchange 33 receives a call transmitted from the subscriber call processing exchange 31 and the Internet VoIP network 40, and determines whether the service identification number assigned to the relay number is included in the called number. If the service identification number is included in the called number, the relay exchange 33 detects the subscriber identification number of the called number and connects the received call to the subscriber call processing exchange in charge of the corresponding subscriber identification number. If the service identification number is not included in the called number, the received call is transmitted to the Internet VoIP network 40. Here, the service identification number is a number necessary for distinguishing which relay exchange 33 should process the call among the plurality of relay exchanges in the communication system of the present invention. Therefore, if there is only one relay switch 33 included in the communication system of the present invention, the service identification number may match the service provider identification number. If there are a plurality of relay exchanges 33 included in the communication system of the present invention, the service identification number includes a carrier identification number and a part of the prefix of the subscriber identification number.

The service identification number processing unit 42 is located in the Internet VoIP network 40, grasps the service identification number of the incoming call number received by the Internet VoIP network 40, and forwards it to the relay switch 33 corresponding to the service identification number. send.

The Internet VoIP network identification number processing unit 94 is located in a public switched telephone network (PSTN) to receive a call originating from a non-subscriber and determine whether the called party's called party number includes the Internet VoIP network identification number. If the Internet VoIP network identification number is included, the received non-subscriber call is transmitted to the Internet VoIP network 40.

In the communication system of FIG. 1, a connection relationship between components constituting the communication system of the present invention and components of an external network is simply illustrated. Therefore, with reference to another embodiment in which the communication system of the present invention is specifically coupled to an external network, the connection relationship and operation of each component will be described in more detail.

2 is a view showing a specific example using the Internet VoIP network of Hanaro communication as another embodiment of a communication system according to the present invention. Referring to this, the communication system according to another embodiment of the present invention includes a subscriber line 10, a switching system 30 and the Internet long-distance telephone network (40). The Internet long distance telephone network 40 corresponds to the Internet VoIP network described in FIG. 1, and in this embodiment, the Hanaro communication Internet VoIP network 40 is used nationwide. In addition, the communication system of the present embodiment is interworked with a plurality of switching stations 20 of the PSTN network.

The subscriber line 10 is a dedicated telephone line connecting the subscriber telephone 70 to a predetermined switching center, which can be leased from the telecommunications operator. In this embodiment, the subscriber leased line 10 is assumed to be a leased line leased from Korea Telecom. Accordingly, the subscriber dedicated line 10 connects the subscriber side telephone 70 to the Korea Communications Commission (20a). The Korean telecommunication switching center 20a is connected to the switching system 30.

The switching stations 20 include four switching stations in this embodiment, all using the reference numeral 20. Each switching center is identified by reference numerals (a, b, etc.) following the reference numerals. The switching center 20 includes an optical end station, which is a signal transmission equipment all having an optical transmission function.

The internal configuration of the switching system 30 includes one or more subscriber call processing exchanges 31, a recording and recording server 35, a billing server 36, a fax server 37, a call center call processing exchange 39 and a relay exchange. (toll exchange, 33). Subscriber call processing exchange 31 is a device that delivers a call (call) received from the subscriber to the relay exchange 33, and delivers the subscriber incoming signal received from the relay exchange 33 to the subscriber side, Private Branch (Private Branch) Exchange). The relay exchange 33 serves to relay, distribute and process the call. That is, the relay exchange 33 connects the call received from the subscriber call processing exchange 31 to another subscriber call processing exchange, transmits it to the Internet long-distance telephone network 40, or the server in charge of the additional service for providing additional services. Connect to. The interior of the switching system 30 also includes optical end stations 38a and 38b for connecting with external switching stations 20a and 20b.

As described above, the Internet long distance telephone network 40 is an Internet VoIP network of Hanaro Telecom. Thus, the switching system 30 is connected to the Internet intercity telephone network 40 via the switching center 20b of Hanaro Telecom. When the general subscriber is a general subscriber of Hanaro communication, the call is connected to the general telephone subscriber side telephone 80 through the Hanaro telecommunication switching center 20c connected to the Internet long distance telephone network 40. However, when the general subscriber is a general subscriber of the Korean telecommunication, the call is connected to the general telephone subscriber side telephone 80 through the switching station 20c of Hanaro Telecom and the switching station 20d of the Korean telecommunication.

In the above case, the description is based on a voice call. In addition to the voice call service, in order to provide various additional services, an additional service processor 32 in charge of a corresponding additional function is included in the switching system 30. In FIG. 2, the recording / recording server 35, the fax server 37, the call center call processing switch 39, and the like correspond to the additional service processor 32 of FIG.

The recording and recording server 35 of the switching system 30 is in charge of a service of recording and recording the call history of the subscriber. It is an additional service for subscribers, such as securities companies, whose call history is important.

The fax server 37 is in charge of a service for sending the received fax content to the subscriber's electronic mail. Subscribers to the fax message service are given their own fax number. Then, if a fax is transmitted to a fax message service subscriber's fax number using a general fax machine, the fax server 37 in the exchange system 30 receives the fax and transmits the fax to the subscriber's e-mail. Therefore, the subscriber of the fax message can receive the fax as long as the environment can receive the e-mail. Unlike the existing integrated message service, such a fax message service is assigned a subscriber's own fax number, which is excellent in terms of user convenience because ordinary fax users need to send a fax in the same manner as a conventional fax. In addition, by using the Internet VoIP network, it is possible to service at a low price regardless of the distance between the city and the city, regardless of the distance.

The fax server 37 is linked with the mail server 60 to transmit the received fax by e-mail. In addition, the fax server 37 preferably includes a memory device for storing the received fax.

Call center call processing switch 39 is responsible for call processing for the call center agency services. Call center agency service is a service that acts on behalf of a large number of businesses over the phone service, a useful service for subscribers, such as small and medium businesses that are burdensome to operate their own call center. To this end, a call center telephone and a terminal device (not shown) may be provided outside the exchange system 30. The call processing call exchanger 39 for a call center is connected to a call center telephone and a terminal device, and connects a call to the call center to the call center telephone. In addition, it grasps the incoming phone number, and plays a role of controlling the information for the business processing of the company corresponding to the incoming phone number to be displayed on the call center terminal device. The call processing exchange 39 for the call center may be implemented as a private exchange (PBX) like a call processing exchange for a subscriber, or may be implemented in a server form (UnPBX) that is not in the form of an exchange.

In addition to the above-described additional services, various communication services may be provided using the communication system of the present invention. That is, using the communication system of the present invention, it is possible to provide in-house telephone service such as direct inward dialing (DID) and direct outward dialing (DOD). The DID / DOD processing is handled by the relay exchange 33 of the exchange system 30.

Voice answering service (ARS) may also be provided. To this end, an ARS device (not shown) connected to the exchange system 30 may be provided separately. The ARS device is connected to the ARS operating computer, and the operator can input various data to be provided to the customer through the ARS operating computer. Therefore, the information required by the customer can be provided as voice information without a separate guide, and the customer can listen to the necessary information by voice with a simple telephone button operation.

In addition, a billing server 36 for processing billing for various services provided by the communication system of the present invention may be further included in the exchange system 30. The billing server 36 is connected to the relay exchange 33 of the switching system 30 to generate and process billing data for a call service, a fax message service, and the like.

3A is a flowchart illustrating a process of processing a subscriber call signal in the communication system of FIG. 2. Referring to this, FIG. 3A shows a process in which a subscriber of the service receives a general subscriber by attempting a call. Here, it is assumed that the subscriber is located in Seoul, and the general subscriber is located in Busan as a general telephone subscriber of the Korean telecommunication.

First, the subscriber picks up the telephone and presses the called party's telephone number (step 202). The outgoing signal is inputted to the subscriber call processing exchange 31 via the subscriber dedicated line 10, the KT 20a, and the optical end station 38a in the switching system 30. The subscriber call processing exchange 31 transmits the received outgoing signal to the relay exchange 33 (step 204). The relay switch 33 looks at the called party's telephone number to determine where to relay. That is, it is determined whether the called party's telephone number includes the service identification number assigned to the recipient (step 206).

If the called party's phone number contains the service identification number assigned to it, the process goes to the subscriber. The process of initiating a call to a subscriber is described later in connection with FIG. 2B. Here, since it is assumed that the called party is a general subscriber, the relay switch 33 transmits an outgoing signal to the Internet long-distance telephone network 40 (step 208). In this step 208, the outgoing signal passes through the wide end station 38b and the switching station 20b of Hanaro communication in the switching system 30. The Internet long-distance telephone network 40 analyzes the called number, checks the area of the called party, and transmits an outgoing signal to the switching center of the corresponding area (step 210). In the present embodiment, since the called party is a subscriber of the Busan area, the originating signal is transmitted to the Busan area switching center of Hanaro Telecom. Then, it is determined whether the called party's general subscriber is a subscriber to Hanaro communication (step 212). Steps 210 and 212 are performed in the internet long distance telephone network 40.

If the called party is a Hanaro communication subscriber, the call is connected to the called party via Hanaro Telecom Switching Station 20c (step 214), and if the called party is a Korea Telecom subscriber, through the Korea Telecom Switching Center 20d (step 216) The call is connected to the called party (step 218).

As the call is connected as described above, the long-distance long distance section uses the Internet VoIP network, thereby reducing the call charge. And since it is not affected by the long and short distance of the call, it is possible to implement a single fare system nationwide. That is, even when making a long distance call, it is advantageous in terms of the fee for users who use a long distance call because they only have to pay a fee for a section using a general local telephone line of the called party and a rental fee for the subscriber side (cheap monthly fee).

3B is a flowchart illustrating a process of processing a subscriber call in the communication system of FIG. 2. Referring to this, FIG. 3B shows a process in which a call is received from a general PSTN subscriber who is not a subscriber of the service and is received by the subscriber of the service, which is the inverse of the process of FIG. 3a. Here, as in FIG. 3A, the subscriber is located in Seoul, and the general subscriber is assumed to be located in Busan as a general subscriber of the Korean telecommunication.

First, when a general subscriber (non-subscriber) picks up the telephone and presses the telephone number of the called party (step 302), the outgoing signal enters the Korea Telecommunication Exchange Bureau 20d via the general telephone line PSTN. The Korean telecommunication switching center 20d determines whether the called party's telephone number includes the Internet long distance network identification number (step 304).

Here, the Internet long distance telephone network identification number corresponds to the above-mentioned Internet VoIP network identification number. Thus, if the called number includes the Internet long distance network identification number, the Korea Telecommunication Exchange Bureau 20d transmits an outgoing signal to the Internet long distance telephone network 40 (step 306). At this time, since the Internet long-distance telephone network 40 is a network of Hanaro communication, the outgoing signal passes through the switching center 20c of Hanaro communication.

The Internet long-distance telephone network 40 grasps the service identification number from the called number and transmits it to the relay switch 33 of the corresponding switching system 30 (step 308). The relay switch 33 grasps the subscriber identification number from the called number and transmits it to the subscriber call processing exchange 31 capable of processing the call of the subscriber (step 310). The subscriber call processing exchange 31 transmits the call to the subscriber-dedicated line 10 corresponding to the subscriber identification number, which is strictly an optical end station 38a and the Korea Telecommunication Exchange Bureau 20a in the switching system 30. ), Through the subscriber line 10, and ultimately connected to the subscriber of the called party (step 312).

Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

Using the communication system of the present invention, even in the case of incoming calls to subscribers, call charges are lowered because the Internet VoIP network is used for the long distance sections, which are long distance sections. In other words, not only when a subscriber makes a call, but also a general subscriber who calls as a subscriber can call at a low rate. In the past, only subscribers who subscribe to the Internet phone service can benefit from low rates. However, when using the service of the present invention, not only the subscriber side, but also the party making a call to the subscriber has an advantage of making a cheap call. Therefore, the present invention will also be able to replace the existing free call service (080 service). That is, the existing 080 service has a disadvantage in that the service is generally limited to the local call area due to the burden of the out-of-town charges. When using the communication system of the present invention, the low-cost local call rate causes the call service area to be nationwide. You can zoom in.

In addition, by the communication system according to the present invention, various additional services may be provided at low rates. In particular, since the fax message service using the communication system of the present invention is assigned a subscriber's own fax number unlike the existing integrated message service, a general fax user can send a fax in the same manner as a conventional fax. Excellent in terms of convenience In addition, by using the Internet VoIP network, it is possible to service at a low price regardless of the distance between the city and the city, regardless of the distance.

Claims (11)

In a communication system for providing a call service using the Internet network, An internet VoIP network, which transmits voice data using an internet protocol and has a predetermined identification number; At least one subscriber line, each receiving a call originating from a corresponding subscriber; One or more subscriber call processing exchanges that transmit and receive a call including a predetermined subscriber identification number to a subscriber line corresponding to the subscriber identification number, and receive and process a call transmitted from the subscriber line; Receiving a call transmitted from a predetermined subscriber call processing exchange of the one or more subscriber call processing exchanges and the Internet VoIP network, and if the called number of the received call includes a predetermined service identification number, among the called numbers of the received call. Identify the subscriber identification number and connect the received call to a subscriber call processing exchange in charge of processing the subscriber identification number, and if the called number of the received call does not include a predetermined service identification number, One or more relay exchanges to transmit the received call; A service identification number processing unit for receiving a call transmitted from the at least one relay switch and a public telephone switching network to the Internet VoIP network, grasping the service identification number of the called number of the received call, and transmitting the received call to the corresponding relay switch. ; An Internet VoIP network identification number processing unit for transmitting the non-subscriber outgoing signal to the Internet VoIP network if the incoming number of the non-subscriber originating call includes the identification number of the Internet VoIP network. A communication system, characterized in that. According to claim 1, wherein the identification number of the Internet VoIP network 030, a communication system. The method of claim 1, wherein the call service A communication system characterized by a single charge nationwide. The method of claim 1, wherein the communication system And a recording / recording server connected to the relay switch, for recording and recording the call history of the subscriber at the request of the subscriber. According to claim 1, The communication system is further provided with a voice answering device connected to the relay switch and providing a predetermined information by voice in response to a signal inputted by the subscriber or the non-subscriber by operating a telephone button, The relay switch further comprises means for connecting the call received by the relay switch to the voice answering device when the subscriber identification number corresponds to a predetermined voice answering service number as a result of the identification of the subscriber identification number. Communication system. According to claim 1, The communication system Call processing exchanger for call center; At least one call center telephone for handling telephone tasks received on behalf of the subscriber, the call center telephone receiving a call received from the call processing exchange for the call center; And And a call center terminal for displaying information related to the processing of the telephone service in response to the control of the call center call processing exchange. Means for connecting the call received to the call center to the call processing exchange if the subscriber identification number corresponds to a predetermined call center service number as a result of identifying the subscriber identification number; And the call center call processing switch further comprises means for connecting the received call to the call center telephone and controlling information corresponding to the call center service number to be displayed on the call center terminal device. According to claim 1, The communication system A mail server connected to the Internet to transmit data received to the email account received with the data; And A fax server, connected to the relay exchange, for temporarily storing fax data of a call received from the relay exchange and transmitting the fax data to the mail server; The relay switch further includes means for connecting the received call to the fax server when the subscriber identification number corresponds to the predetermined fax number as a result of the identification of the subscriber identification number. And the fax server further comprises means for sending the subscriber's e-mail account corresponding to the fax number together with the fax data to the mail server. In a communication system that transmits voice data using an Internet protocol, and provides a call service at a single rate nationwide using an Internet VoIP network having a predetermined identification number. Receiving calls originating from corresponding subscribers using at least one subscriber leased line, respectively; Transmitting and receiving a call including a predetermined subscriber identification number to a subscriber line corresponding to the subscriber identification number by using one or more subscriber call processing exchanges, and receiving and processing a call transmitted from the subscriber line. ; Receiving a call transmitted from a predetermined subscriber call processing exchange of the one or more subscriber call processing exchanges and the Internet VoIP network by using one or more relay exchanges, and if the called number of the received call includes a predetermined service identification number, Identify a subscriber identification number of the called number of the received call and connect the received call to a subscriber call processing exchange in charge of processing the subscriber identification number, and if the called number of the received call does not include the service identification number Transmitting the received call to the Internet VoIP network; Receives a call transmitted from the at least one relay switch and a public telephone switching network to the Internet VoIP network with a service identification number processing unit, grasps the service identification number of the called number of the received call and sends the received call to the corresponding relay switch. Transmitting; An Internet VoIP network identification number processing unit and receiving a call originating from a non-subscriber, and if the called number of the non-subscriber outgoing call includes the identification number of the VoIP network, the non-subscriber outgoing signal is transmitted to the Internet VoIP network. Call service providing method comprising the step of. The method of claim 8, wherein the identification number of the Internet VoIP network Call service providing method, characterized in that 030. In the Internet network, a method of transmitting voice data using the Internet protocol, and providing a call service using the Internet VoIP network having a predetermined identification number, (a) assigning a subscriber a number including an Internet VoIP network identification number, a carrier identification number, and a subscriber identification number, which are identification numbers of the Internet VoIP network; (b) a subscriber outgoing signal processing step of receiving a call originating from the subscriber through a predetermined subscriber dedicated line and connecting to a called number of the subscriber outgoing call; And (c) a non-subscriber call signal processing step of receiving a call originating from a party other than the subscriber (non-subscriber) and connecting to a called number of the non-subscriber call signal; Subscriber call signal processing step of step (b) (b1) determining whether a called number of the subscriber calling signal includes a predetermined service identification number; (b2) if the called party number of the subscriber calling signal includes the service identification number, grasps the subscriber identification number of the called party number of the non-subscriber calling signal, and connects the subscriber calling signal through a subscriber dedicated line corresponding to the subscriber identification number; Making; And (b3) if the called number of the subscriber calling signal does not include the service identification number, connecting the subscriber calling signal through the Internet VoIP network; The non-subscriber signal processing step of step (c) (c1) if the called number of the non-subscriber originating signal includes the Internet VoIP network identification number, transmitting the non-subscriber outgoing signal to the Internet VoIP network; And (c2) if the called number of the non-subscriber calling signal includes the service identification number, the subscriber identification number of the called number of the non-subscriber calling signal is identified, and the non-subscriber calling signal is transmitted through a subscriber line corresponding to the subscriber identification number. Having a step of connecting the And the service identification number includes the service provider identification number. The method of claim 8, wherein the call service Method of providing a call service, characterized in that the single rate nationwide.