KR20040039111A - Apparatus for providing ring back tone using intelligent network system and method therefor - Google Patents

Abstract

PURPOSE: A method for supplying a ring back tone using an intelligent network system and a method therefor are provided to supply an inherent ring back tone according to ring back tone information of a receiving subscriber by using an intelligent network system instead of a switching system, thereby varying ring back tones and obtaining accuracy by pre-deciding suitability of a called number. CONSTITUTION: An originating subscriber(600) transmits a call request to an originating exchange(210)(S11). The originating exchange(210) transmits a reception request to a receiving exchange(200)(S12). The receiving exchange(200) requests an intelligent network IP(110) to transmit a ring back tone if a receiving subscriber is registered(S13). The intelligent network IP(110) requests an intelligent network SCP(120) to transmit ring back tone information(S14). The intelligent network SCP(120) transmits selected ring back tone information to the intelligent network IP(110)(S15). The intelligent network IP(110) delivers a self ring back tone to the receiving exchange(200)(S16). When a call is connected(S17), the receiving exchange(200) requests the intelligent network IP(110) to release the call(S18). The intelligent network IP(110) stops delivering the ring back tone.

Description

Apparatus for providing ring back tone using intelligent network system and method therefor}

The present invention relates to a call waiting sound providing service, and more particularly, to an apparatus and method for providing call waiting sound using an intelligent network system.

In the existing communication network, when a calling subscriber tries to make a call, a predetermined constant call waiting sound is provided. These call waiting sounds are provided by the destination exchange of the existing communication network, and each exchange provides a designated call waiting tone to the calling subscriber at the call waiting time before the call is made. Thus, the designated call waiting sound provided by the exchange has the following problems.

First, many exchanges provide the same call waiting to verify that the call attempt is successful. When the calling subscriber attempts to make a call, the calling subscriber listens to the call waiting sound and uses it as a basis for determining whether the calling attempt is made correctly. However, since many exchanges provide the same call waiting sound, it is not possible to confirm whether the call waiting sound is correctly connected to the destination exchange or whether the destination exchange correctly performs a call attempt to the called subscriber.

Second, existing designated call waiting sound cannot provide personalized and personalized service for subscriber. The existing call waiting tone adopts a method of transmitting the same tone to all subscribers at the exchange. Therefore, the existing method cannot deliver the call waiting sound specialized to the subscriber, and thus personalized and personalized service for the subscriber is impossible.

Third, in the case of a mobile network, since a subscriber moves several exchanges by roaming, it is not possible to provide a call waiting sound for a specific subscriber in a specific exchange. Therefore, there is a problem in that the exchange cannot transmit various call waiting sounds for each subscriber in a manner of transmitting call waiting sounds as in the prior art.

An object of the present invention is to provide an apparatus and method for providing various call waiting sounds using an intelligent network system.

Another object of the present invention is to provide a computer-readable recording medium having recorded thereon a program for executing the above call waiting sound providing method on a computer.

1 is a block diagram of a communication network system to which the method for providing a call waiting sound according to the present invention is applied.

2 is a signal flow diagram illustrating a method for providing a call waiting sound according to the present invention.

3 is a signal flow diagram illustrating a procedure for registering or canceling a call waiting tone service subscriber.

4 is a signal flowchart illustrating a procedure of changing a call waiting tone service type by a call waiting tone service subscriber.

5 is a signal flow diagram illustrating a procedure for changing a call waiting sound file in response to a call waiting sound file registration or deletion request of a content provider.

The apparatus for providing a call waiting sound according to the present invention for achieving the above technical problem comprises: an exchange connection unit for receiving a call waiting sound for a called subscriber from an exchange; A standby sound file storage for storing a call waiting sound file; A standby sound file selection unit for selecting one of a standby tone file stored in the standby tone file storage unit in response to a call standby tone request through the exchange connector; And a call waiting sound sending unit which generates a call waiting sound from the call waiting sound file selected by the waiting sound file selecting unit and sends the call waiting sound to the exchange.

According to an aspect of the present invention, there is provided a method for providing a call waiting sound, the method comprising: receiving a call waiting sound from an exchange; Selecting a call waiting tone file for the call waiting tone request; Generating a call waiting tone from the call waiting tone file; And sending the call waiting sound to the exchange.

Hereinafter, an apparatus and method for providing a call waiting sound according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of a communication network system to which the method for providing a call waiting sound according to the present invention is applied.

The communication network can be largely divided into a wired network and a mobile network. The wired network refers to a network in which a subscriber's terminal and a communication network are connected by wire, such as a conventional public switched telephone network (PSTN) or an integrated services digital network (ISDN), so that a subscriber can make a call at a designated location. A mobile network is a mobile communication network serviced using a method such as Advanced Mobile Phone Systems (AMPS), Time Division Multiple Access (TDMA), Code Division Multiple Access (CDMA), and the subscriber's terminal and the communication network are connected wirelessly. A network that can carry out calls at any location. The present invention is applicable to both wired and mobile networks.

Subscribers who receive services in the communication network can be roughly divided into calling subscribers and called subscribers. The calling party is the person who makes the call, and the called party is the person who receives the call. The calling party and the called party may be located in the same communication network or in different communication networks.

The ring back tone, also called a ring tone, refers to a tone sent to the calling subscriber to notify the called subscriber that a call signal is being sent to the called subscriber.

The present invention provides a variety of call waiting sounds to each subscriber by using the intelligent network system 100 forming the backbone of the communication network. The elements of the intelligent network system used for the implementation of the present invention are the intelligent network service control point (SCP) and intelligent network IP (Intelligent Peripheral). In general, the intelligent network SCP 120 performs a call processing function, the intelligent network IP 110 performs a function for providing data such as voice.

In the present invention, the call waiting sound is not provided by the destination exchange 200, and the intelligent network IP 110 of the intelligent network system 100 transmits the call waiting sound. That is, the destination exchange 200 requests the intelligent network IP 110 to provide call waiting sounds, and the intelligent network IP 110 transfers the call waiting sounds on behalf of the destination exchange 200. To this end, the intelligent network IP 110 stores various call waiting sounds, and works with the intelligent network SCP 120 to select call waiting sounds unique to each subscriber. The intelligent network SCP 120 manages which call waiting tone is used by each subscriber and provides this information to the intelligent network IP 110.

The physical connection and application protocols of the systems for the present invention are as follows. The exchange system and the intelligent network IP 110 are physically connected by an E1 line, and the applied protocol is Common Channel Signaling (CCS) No. Use 7. The intelligent network IP 110 is physically connected to the intelligent network SCP 120 by Ethernet, and uses an IP protocol as an application protocol. The intelligent network IP 110 and the gateway system 400, the intelligent network SCP 120 and the gateway system 400 are connected by Ethernet, and the application protocol uses the IP protocol.

Exchange system 200 and 210 is a system for connecting the call between the calling party and the called party in the communication network. The exchange system may be divided into an originating exchange 210 that provides a service to an originating subscriber and a destination exchange 200 that provides a service to a called subscriber when the call service is made. The exchange system is connected to the intelligent network system 100 for the intelligent network service, in the case of the present invention, the destination exchange system 200 is connected to the intelligent network IP (110). When the called party registers a service for providing a unique call waiting sound, the called exchange system 200 requests the intelligent network IP 110 to provide a call waiting sound for the corresponding subscriber. When the intelligent network IP 110 transmits a call waiting sound for the corresponding subscriber, the intelligent network IP 110 transmits the call waiting sound to the calling subscriber 210 to provide the calling subscriber with a call waiting sound unique to the called subscriber. Subsequently, when the called party succeeds in the call, the call is disconnected from the intelligent network IP 110 and the call waiting sound is stopped from the calling party, and the actual call is provided between the calling party and the called party.

Intelligent Peripheral (IP) 110 is responsible for transmitting the actual call waiting sound. To this end, the intelligent network IP 110 provides four functions, such as a signal connection function with the exchange, a call waiting sound transmission function to the exchange, an interworking function with the intelligent network SCP 120, and an interworking function with the gateway system 400.

First, the signal connection function with the exchange means processing a signal connection function such as receiving a call waiting sound for a specific subscriber from the exchange 200 or requesting to stop a call waiting sound transmission for a specific subscriber from the exchange.

Second, the call waiting sound transmission function to the switch means that the intelligent network IP 110 transmits the call waiting sound unique to the subscriber to the switch 200. To this end, the intelligent network IP 110 stores a call waiting sound for each subscriber in the form of a file (or a record of a database), and generates a call waiting sound from these stored call waiting sound files and transmits the call waiting sound to the exchange 200. To perform.

Third, the interworking function with the intelligent network SCP means a function of receiving call waiting sound information for the corresponding subscriber from the intelligent network SCP 120 in order to select a call waiting sound for each subscriber. The intelligent network IP 110 only stores various call waiting sounds in a file format and does not have information on which call waiting sounds should be delivered to the subscriber. That is, information on what kind of call waiting sound to be delivered to the subscriber at this point, that is, call waiting sound information, is stored in the intelligent network SCP 120, so that the intelligent network IP 110 receives the requested called party number. After obtaining information on which call waiting sound should be delivered by sending it to the intelligent network SCP 120, using the corresponding information, select the call waiting sound file to be sent, generate a call waiting sound from it, and send it to the calling subscriber through the exchange. .

Fourth, the interworking function with the gateway system refers to a function that the intelligent network IP 110 processes a request for registering a new call waiting sound, deleting an existing call waiting sound, changing an existing call waiting sound, etc. from the gateway system 400. do. In the case of registering a new call waiting sound, the intelligent network IP 110 receives the corresponding file from the gateway system 400 and stores the file in its own storage device such as a disk. In the case of deleting the existing call waiting sound, the corresponding call waiting sound file is deleted from its storage device from the gateway system 400. In the case of changing the existing call waiting sound, it means a function of storing the changed file received from the gateway system 400 in place of the existing file.

The intelligent network SCP (Service Control Point, 120) uses the subscriber information and current time information to determine which call waiting sound to send to each subscriber. To this end, the intelligent network SCP provides three functions: subscriber information management and call processing, interworking with the intelligent network IP 110, and interworking with the gateway system 400.

First, the subscriber information management and call processing function is the intelligent network SCP (120) stores and manages subscriber information in a database and uses these information to perform a call processing function for the call waiting tone information request of the intelligent network IP (110). Means. The intelligent network SCP maintains a database of information about what kind of call waiting sound is sent to each subscriber. Examples of such information include: 1) unique call waiting tone information specified by each subscriber, 2) call waiting tone information for each condition according to various conditions such as incoming time and calling number, 3) call waiting tone information for advertisement according to the acceptance of the advertisement of the subscriber, 4 ) Call waiting tone information for announcement or notification according to the subscriber's announcement or notification acceptance.

In the case of providing a call waiting sound specialized for each subscriber, the subscriber (receiving subscriber) registers his own sound, and provides the call waiting sound with the subscriber's own sound registered to the calling subscriber who tries to receive the call. The subscriber can register and change various tones as call waiting sounds. You can also provide specialized call waiting tones for specific destination groups. The service provider designates several called subscribers as a group, registers a group-specific tone for the designated group, and provides a group-specific tone registered to the calling subscriber who attempts to receive the group as a call waiting sound. You can register and change various sounds as call waiting tones for each group. By providing a call waiting tone unique to the called party, the calling subscriber can know that the call attempt is proceeding correctly. The calling party can confirm that the call attempt for the called party is proceeding correctly by listening to the call waiting sound unique to the called party. This can avoid worrying about errors in the call attempt during the call waiting time, and the call waiting time feels relatively short.

In addition, the advertisement content may be provided as a call waiting sound. Individual subscribers, group subscribers, or service providers, such as corporations, individuals, or governments, may deliver advertisements on call waiting. First, an individual subscriber or a group subscriber registers unique advertisement content as a call waiting sound, and sends out the advertisement content as a call waiting sound to the calling subscriber who attempts to receive the corresponding subscriber. Each individual subscriber or group subscriber can register and change various advertisements as call waiting sounds. By using the call waiting sound as an advertisement, service subscribers such as businesses, individuals, and governments can enjoy the advertising effect, thereby creating added value. In other words, the advertisement contents registered by the called subscriber can be effected by the calling subscriber listening to the call waiting time. The telecommunications service provider or the content provider can earn a fee for use of the advertisement effect. After all, by using call waiting sound as an advertisement, it is possible to achieve the effect of value added.

The communication service provider may register advertisement contents unique to the service provider with respect to some or all of the subscribers subscribed to the subscriber, and may provide advertisements by call waiting to the calling subscriber who attempts to receive the corresponding subscriber. The service provider may register and change various advertisement contents as call waiting sounds. A telecommunications service provider can sell the present invention to a subscriber as a service product that provides various call waiting sounds, thereby creating added value. Since the present invention can provide a unique call waiting sound for each individual or group subscriber, the communication service provider can sell the contents of the present invention as a service product for the individual or group subscriber. Therefore, it is possible to achieve the effect of value added by the sale of service products.

A service that provides announcements or announcements with a call waiting tone provides a call waiting tone for a company, government, or individual to announce or announce the announcement. Companies, governments, or individuals who want to make announcements or announcements will deliver the announcements or announcements to some or all subscribers of the service provider by ring tone. Corporations, governments, or individuals may register and change notices or announcements as ring tone. By using the call waiting sound as an announcement or notification, a large number of people can be notified and notified in a short time, and can add value in the process. Governments, corporations and individuals can provide announcements, announcements, announcements, etc., of business announcements, phone number changes, and so forth for callers. In general, outgoing subscribers are people who are interested in the called party. If the announcement or announcement is made on the call waiting tone, the effect is much greater than the random announcement or announcement.

Second, the interworking function with the intelligent network IP refers to a function of searching for a database and responding with a call processing function when the intelligent network IP 110 requests which call waiting sound to send to a specific subscriber. The intelligent network IP 110 manages the call waiting sound in the form of a file, and the intelligent network SCP 120 decides which call waiting sound should be delivered to which subscriber. Therefore, the intelligent network SCP 120 is to communicate the type of call waiting sound for each subscriber through the interworking with the intelligent network IP (110).

Third, the interworking function with the gateway system means a function of registering, changing, or canceling a service for a subscriber or changing a call waiting sound type for a subscriber. The subscriber who wants to provide various call waiting service requests the service registration through the Internet, etc., and this request is transmitted to the intelligent network SCP 120 through the gateway system 400. The intelligent network SCP 120 receiving the request starts service for the subscriber by generating the requested subscriber information in the database. Termination and change of services are also carried out through the same process as registration. When the subscriber wants to change the call waiting sound through the Internet or the like, this request is also transmitted to the intelligent network SCP 120 through the gateway system 400. The intelligent network SCP 120 receiving the request changes the call waiting tone information of the subscriber, and accordingly, the call waiting tone to be transmitted by the intelligent network IP 110 is changed.

The gateway system 400 performs a function of registering, deleting or changing a call waiting sound file, or registering, canceling or changing a service for a subscriber between a communication network and the Internet. The gateway system 400 interworks with the Internet or ARS system to perform these two functions. That is, a service registration, change, or cancellation request for the subscriber is received through the Internet, and the subscriber's call waiting sound change request is received through the Internet. And, in response to these requests, the gateway system 400 interoperates with the intelligent network SCP 120 and the intelligent network IP 110, and changes the subscriber information in the intelligent network SCP 120, and the call waiting sound file is generated in the intelligent network IP 110. To be changed. In addition, the gateway system 400 interworks with the content provider 500 through the Internet.

In the case of a wired network, each subscriber is managed in a designated exchange system. Accordingly, each exchange system 200 and 210 should store and manage information on whether to register various call waiting services for subscribers managed by them. The exchange system may transmit a unique call waiting sound for the subscriber in association with the intelligent network IP 120 based on the service registration information.

In the case of a mobile network, each subscriber can move several switching systems due to the characteristics of the network. That is, the subscriber information may move to various exchange systems as the subscriber moves. Due to the movement of subscriber information, the mobile network stores subscriber information in a home location register (HLR) or a home subscriber server (HSS). And, in the exchange system where the current subscriber is located, it receives and manages the subscriber information from such an HLR (300). Therefore, the subscriber's service registration should be managed not only in the exchange system but also in the HLR 300. Eventually, each exchange system obtains subscriber information from its own area, such as from the HLR 300, which includes various call waiting service information, and the exchange system 200 uses the IP network IP. By interlocking with 110, various call waiting sounds are transmitted.

FIG. 2 is a signal flow diagram illustrating a method for providing a call waiting sound according to the present invention, and illustrates a basic call processing procedure for transmitting a call waiting sound unique to a called party to a calling party.

First, the calling subscriber 600 transmits a call request with the called subscriber to the calling switch 210 (S11). In addition, the originating exchange 210 transmits an incoming request for the called subscriber to the called exchange 200, and in this process, there may be an interworking with the exchange transmitting a signal such as a relay exchange (S12). Next, when the called subscriber registers for the service, the destination exchange 200 requests the intelligent network IP 110 to transmit a call waiting sound (S13), and the intelligent network IP 110 receiving the request has a call waiting sound unique to the corresponding subscriber. In order to know the type, intelligent network SCP 120 requests call waiting sound information (S14). The intelligent network SCP 120 receiving the request of the intelligent network IP 110 selects the call waiting tone information for the corresponding subscriber using the called number, the calling number, the current time, and the like, and transmits it to the intelligent network IP (S15). The 110 transmits the call waiting sound managed by the user in the form of a file by using the received call waiting sound information (S16). This call waiting sound is then transmitted to the calling subscriber via the called exchange, the calling exchange, and the like. Finally, when the called subscriber is in response to the call (S17), the destination exchange 200 requests the call release to the intelligent network IP (110) (S18), the intelligent network IP 110 stops transmitting the call waiting sound. .

3 is a signal flow diagram illustrating a procedure for registering or canceling a call waiting tone service subscriber.

First, the call waiting service subscriber 510 requests service registration or cancellation through the Internet or ARS, and the request is transmitted to the gateway system 400 (S21). The gateway system 400 transmits a registration request or cancellation request of the subscriber to the intelligent network SCP 120 (S22), and the intelligent network SCP 120 receiving the request generates or deletes information on the corresponding subscriber in the database (S23). ). The intelligent network SCP 120 which has performed the subscriber creation request or the deletion request transmits the result to the gateway system 400 (S24). The gateway system 400 receiving the result from the intelligent network SCP 120 transmits the result to the subscriber 510 through the Internet or ARS (S25).

4 is a signal flowchart illustrating a procedure of changing a call waiting tone service type by a call waiting tone service subscriber.

The procedure for changing the service type refers to a procedure in which the call waiting tone service subscriber 510 changes a method of changing its own call waiting tone or selecting a call waiting tone. First, the service subscriber 510 requests to change the call waiting sound or to change the call waiting sound selection method through the Internet or ARS (S31), and the request is transmitted to the gateway system 400. In addition, the gateway system 400 transmits the subscriber change request to the intelligent network SCP 120 managing the subscriber's call waiting sound information (S32). The intelligent network SCP 120 changes the subscriber information according to the change request of the subscriber (S33), and transmits the result to the gateway system 400 (S34). The gateway system 400 receiving the result from the intelligent network SCP 120 transmits the result to the subscriber through the Internet or ARS (S35).

5 is a signal flow diagram illustrating a procedure for changing a call waiting sound file in response to a call waiting sound file registration or deletion request of a content provider.

The procedure of changing the call waiting sound file refers to a procedure of registering a newly recorded call waiting sound or deleting an existing call waiting sound. First, the content provider 500 requests registration of a new call waiting sound file or deletion of an existing call waiting sound file through the Internet (S41), and the request is transmitted to the gateway system 400. The gateway system 400 transmits this request to the intelligent network SCP 120 (S42). Upon receiving the request, the intelligent network SCP 120 stores information such as a code value for a new call waiting sound or deletes existing information (S43), and transmits the result to the gateway system 400 (S44). In the case of registering a call waiting sound file, the gateway system 400 receiving the result transmits a new call waiting sound file to the intelligent network IP 110 (S45). In the case of file deletion, the deletion request is transmitted to the intelligent network IP 110. The intelligent network IP 110 stores the received new call waiting sound file in its storage device, or deletes the corresponding file from the storage device in case of a deletion request (S46), and transmits the result to the gateway system 400 (S47). ). The gateway system 400 receiving the result from the intelligent network IP transmits the result to the content provider 500 through the Internet (S48).

Various content providers 500 may sell call waiting sounds to subscribers 510 in the form of content, thereby creating added value. Call waiting sounds are endless, including popular music, classical music, nature sounds, and subscriber voices. Thus, all of these recordable and audible sounds may be sold in the form of content called call waiting sounds. That is, the content providers 500 may sell the call waiting sound generated by the content providers as a product to the subscriber. As a result, it is possible to achieve the effect of value added by selling the call waiting sound as a content product.

As described above, according to the apparatus and method for providing a call waiting sound according to the present invention, it is possible to diversify the call waiting sound heard by the calling subscriber in the communication network, and through this, the calling subscriber can determine in advance whether the calling number is appropriate. Incoming subscribers can enjoy the effect of advertising, and can transmit call waiting sounds of personalized and personalized contents. In other words, through the present invention to ensure the accuracy of the call attempt to the incoming subscriber, and to create a value-added service of the service provider through the various call waiting sound services, activation of the content business with the content of the call waiting sound and creating value added through the call waiting sound advertising It is possible to create value added using a method, and to create value added using a notification or notification method of call waiting sound.

The present invention can be embodied as code that can be read by a computer (including all devices having an information processing function) in a computer-readable recording medium. The computer-readable recording medium includes all kinds of recording devices in which data that can be read by a computer system is stored. Examples of computer-readable recording devices include ROM, RAM, CD-ROM, magnetic tape, floppy disks, optical data storage devices, and the like.

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.

According to the apparatus and method for providing a call waiting sound according to the present invention, by providing a call waiting sound using an intelligent network system rather than an exchange system, the call waiting sound heard by a calling subscriber in a communication network can be diversified, and the calling subscriber calls his The accuracy of the call attempt can be secured by determining the suitability of the number in advance, and by providing a call waiting sound using an intelligent network system rather than an exchange system, various call waiting sounds can be provided in a mobile network.

In addition, by providing a variety of call waiting sounds according to the call waiting sound information of the incoming subscriber, the creation of value added by the service provider, activation of the content business with the call waiting sound as the content and the creation of value added through the use of the call waiting sound as an advertising method, and It can be used to create added value using notification or announcement method.

Claims (15)

An exchange connection unit for receiving a call waiting sound for the called subscriber from the exchange; A standby sound file storage for storing a call waiting sound file; A standby sound file selection unit for selecting one of a standby tone file stored in the standby tone file storage unit in response to a call standby tone request through the exchange connector; And And a call waiting sound transmitting unit which generates a call waiting sound from the call waiting sound file selected by the waiting sound file selecting unit and sends the call waiting sound to the exchange. The method of claim 1, It further comprises an intelligent network service control unit for storing and managing the call waiting sound information for the call waiting sound providing service subscribers, The standby sound file selection unit receives the call waiting tone information for the called subscriber from the intelligent network service control unit and selects a call waiting tone file accordingly. The method of claim 2, wherein the intelligent network service control unit, A waiting tone information database for storing call waiting tone information for a call waiting tone providing service subscriber; And In response to the call waiting tone information request of the intelligent network device, Call waiting tone information corresponding to the called subscriber from the call waiting sound information stored in the standby tone information database comprises a standby tone information transmission unit for sending to the intelligent network device; Atmospheric sound providing device. The method of claim 1, Receives a call waiting sound file storage or deletion request from a gateway system, and if the request is a file storage request, receives a call waiting sound file and stores the call waiting sound file in the standby sound file storage unit, and when the request is a file deletion request, stores the standby sound file. And a standby sound file processing unit for deleting the corresponding standby sound file stored in the unit. The method of claim 1, And the switch stores and manages whether or not a subscriber registers a call waiting sound providing service. The method of claim 1, wherein the exchanger, And store and manage subscriber information including whether a subscriber registers a call waiting sound providing service and transmits the subscriber information to the exchange. (a) receiving a call waiting tone from an exchange; (b) selecting a call waiting tone file for the call waiting tone request; (c) generating a call waiting tone from the call waiting tone file; And (d) transmitting the call waiting sound to the exchange. The method of claim 7, wherein step (b), (b1) selecting call waiting tone information corresponding to the call waiting tone request; And (b2) selecting a call waiting tone file according to the call waiting tone information. The method of claim 7, wherein And the call waiting tone information is unique according to the called party, the calling party or the incoming time. The method of claim 7, wherein The called subscriber belongs to one of a plurality of groups, and the call waiting tone information is unique according to the group. The method of claim 7, wherein The call waiting sound provides a call waiting sound, characterized in that the advertising, announcements or announcements of the enterprise, the government, or individuals. The method of claim 7, wherein before performing step (a), (e) receiving a request for registration or termination of a call waiting sound providing service from a gateway system; And (f) generating and storing call waiting tone information for the subscriber according to the request, or deleting stored call waiting tone information. The method of claim 7, wherein before performing step (a), (e) accepting a call waiting tone information change request of the subscriber from the gateway system; And and (f) changing the stored call waiting sound information according to the request. The method of claim 7, wherein before performing step (a), (e) receiving a call waiting sound file registration or deletion request of the content provider from the gateway system; (f) changing stored call waiting information according to the request; (g) if the request is a call waiting sound file registration request, receiving and storing a new call waiting sound file from a gateway system; And and (h) if the request is a call waiting sound file deletion request, deleting the corresponding call waiting sound file. (a) receiving a call waiting tone from an exchange; (b) selecting a call waiting tone file for the call waiting tone request; (c) generating a call waiting tone from the call waiting tone file; And (d) a computer-readable recording medium having recorded thereon a program for causing the computer to execute the step of transmitting the call waiting sound to the exchange.