KR100974298B1 - System and method for servicing ring back tone - Google Patents

Abstract

The present invention relates to a ring back tone providing system and method thereof. In the ringback tone providing method of the present invention, the called local exchange checks whether the called party system subscribes to the ringback tone service in response to a call request from the calling party system, and if the called party system is subscribed to the ringback tone service, the call is sent to the intelligent network. It checks whether the call triggered from the called local exchange is an intelligent network service call, and if the intelligent network service call, the called system transmits a predetermined ringback tone to the calling system and calls a called party system connected to a private exchange. In this way, various ringback tones desired by the called party system can be transmitted to the calling party system using the intelligent network. In addition, the corporate subscriber may send a ringback tone for the corporate publicity to the sender through the ringback tone service of the present invention.

Ringback tone, intelligent network, wired network, private exchange, receive-only subscriber

Description

Ring back tone providing system and method thereof {SYSTEM AND METHOD FOR SERVICING RING BACK TONE}

1 is a view schematically showing the configuration of a ringback tone providing system in a wired network according to an embodiment of the present invention.

2 is a view showing a schematic flow of a ringback tone service providing method according to an embodiment of the present invention.

3A is a diagram illustrating a signal flow for providing a ringback tone service to a called party system connected through a terminating local exchange in a ringback tone service providing system according to an exemplary embodiment of the present invention.

3B is a diagram illustrating a signal flow for providing ringback tone service to a called party system connected through a relay switch in a ringback tone service providing system according to an exemplary embodiment of the present invention.

The present invention relates to a ring back tone providing system and a method in a wired communication network.                         

In general, when a caller attempts to make a telephone call (outgoing call) in a wired / wireless communication network, an incoming exchange of a wired / wireless communication network that receives an outgoing call transmits a uniform ringback tone according to the ITU-T standard. Output through Therefore, the caller can listen to this ringback tone to check the status of the current called party (No answer, Busy, Paging No Response).

On the other hand, in recent years, a method in which a terminating exchange that receives a call in a communication network transmits arbitrary ringback tones previously designated by various called parties to the originating exchange instead of a uniform ringback tone, and is outputted through the caller's terminal. Proposed in 10-290289. The method proposed in this patent allows a ringback tone selected by the called party to be transmitted when a conventional ringback tone is transmitted to the calling party terminal when the caller sends a call to the called party's terminal subscribed to a service providing various ringback tones. will be. However, this patent relates to a ringback tone service method for a wireless communication network, and does not disclose a method for serving various ringback tones in a wired communication network.

Meanwhile, Korean Patent Registration Publication No. 10-2788898 proposes a method of serving various ringback tones in a wired communication network. However, this method does not provide the caller with the desired ringback tone to the caller, but provides a caller who subscribes to the service with a ringback tone that the subscriber wants, such as a company's announcement, to the caller. By listening to the ringback tone of the telecommunications, etc. to discount the price.

 Therefore, the technical problem to be achieved by the present invention is to provide a system and method for servicing a ringback tone to the caller by specifying the desired ringback tone, such as company promotion by the company that is a called party to the service in the wired communication network.

In addition, an object of the present invention is to provide a system and method for servicing ringback tone between extension numbers of enterprises connected by a private exchange or a tandem exchange.

The ringback tone providing service according to the characteristics of the present invention to solve this problem is to provide the ringback tone to the caller system calling the called party system connected to the destination local exchange through an intelligent network system including an intelligent additional device, a service switchgear and a service control device. As a method of providing

a) the called local exchange forwarding the call received from the calling system to the intelligent network system; b) if the intelligent network system checks whether the call transmitted from the called local exchange is an intelligent network service call and transmits a ringback tone prescribed by the called system to the calling system and sends the called party system through the called local exchange. Calling; And c) when the called party system responds, requesting the service control device to connect the calling party system and the called party system to the service exchange.

A ringback tone providing service according to another aspect of the present invention is a method for providing a ringback tone through an intelligent network system including an intelligent additional device and a service control device to a caller system calling a called party system connected to a relay exchange.

a) forwarding, by the relay exchange, a call received from the originator system to the service control device; b) the service control device confirming whether the call received from the relay switch is an intelligent network service call, and if the intelligent network service call transmits a ringback tone predetermined by the called party system to the calling system, calling the called party system; And c) when the called party system responds, requesting the service control device to connect the calling party system and the called party system to the service exchange.

In addition, the ringback tone providing system according to a feature of the present invention,

A system that provides a ringback tone to a calling party system calling a called party system connected to an incoming local exchange,
An incoming local exchange transferring the call received from the originator system to the intelligent network system; And an intelligent network system for analyzing a call received from the called local exchange and transmitting a ringback tone corresponding to the called party system identification number to the calling system, wherein the intelligent network system includes the ringback tone corresponding to the called party identification number. Intelligent additional device provided to the caller system; A service exchanger for verifying whether the call received from the called local exchange is an intelligent network service call and requesting ringback tones if the intelligent network service is a call; And a service control device for controlling a call to be connected to the intelligent additional device in response to a request from the service exchange, wherein the incoming local exchange sends the received call to the intelligent network system when a call is received from the originating system. When the call is received from the intelligent network system, the called party system is called.

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In addition, the ringback tone providing system according to another feature of the present invention,

A system for providing a ringback tone to a calling party system calling a called party system connected to an intermediate exchange,
A relay switch located in an intelligent network system and transmitting a call received from the originator system to a service control device of the intelligent network system; An intelligent additional device for analyzing a call received from the relay exchange and providing a ringback tone corresponding to the called party identification number; And a service control device for controlling a call to be connected to the intelligent additional device according to a request of the relay switch, wherein the relay switch forwards the received call to the service control device when a call is received from the originator system. When the call is received from the service control device, the called party system is called.

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DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention. Like parts are designated by like reference numerals throughout the specification.

First, a ring back tone providing system in a wired network according to an embodiment of the present invention will be described in detail.

Figure 1 shows a brief configuration of a ringback tone providing system in a wired network according to an embodiment of the present invention.

As shown in FIG. 1, a ringback tone providing system in a wired network according to an embodiment of the present invention includes a calling party system 100, a called party system 200, a called party system 300, a public switched telephone network 400, and an intelligent network 500. ) And the network 600.

Caller system 100 includes a caller wired terminal 110 and a caller mobile communication terminal 120.

The called party system 200 includes a plurality of wired terminals 210, 221, and 222, and the called wired terminals 210, 221, and 222 are subscribed to a ringback tone service.

The called party system 300 includes a plurality of wired terminals 311 and 312, and the called wired terminals 311 and 312 are connected to the intelligent network 400 through a relay switch (Tandem) 510. At this time, the incoming wired terminals 311 and 312 are connected to the relay switch 510 through the private switch 310.

At this time, the wired terminal 210 of the called party system 200 is a general subscriber, and the wired terminals 221 and 222 and the called party system 300 of the called party system 200 are DID (DIRECT INWORD DIALING) subscribers.

The Public Switched Telephone Network (PSTN) 400 includes an incoming Local Exchange (LE) 410, which is connected to the called wired terminals 210, 221, and 222. Responsible for call processing. Wired terminals 221 and 222 are connected to a destination local exchange 410 via a Private Branch Exchange (PBX) 220.

The intelligent network 500 is to provide ringback tone services for the called party systems 200 and 300 subscribed to the ringback tone service, and includes a service switching point (SSP) 510 and a service control device ( Service Control Point (SCP) 520 and Intelligent Peripheral (IP) 530.

The service exchanger 510 connects the call to the public switched telephone network 400 according to the control signal of the service control device 520. In this case, the relay exchange connecting the service exchanger and the called party system 300 may be implemented in the same exchange 510.

The service control device 520 may transmit a ringback tone desired by the called party to the calling party system 100 when the call is requested from the calling party system 100 to the called party system 200 or 300 subscribed to the ringback tone service. And a control signal to the intelligent additional device 530.

The intelligent additional device 530 includes a database 531 in which a ringback tone code is stored, and transmits the ringback tone specified by the called party system 200 or 300 to the caller system 100 according to a control signal of the service control device 520. to provide.

The network 600 provides actual sound sources of various ringback tones provided by the intelligent network 500, and is connected to the called party systems 200 and 300 to play various roles necessary for subscribing to the ringback tone providing service and changing the ringback tone. To this end, the called party systems 200 and 300 may further include a called party terminal (not shown) for connecting to the network 600.

Next, the operation of the ringback tone service providing system according to an exemplary embodiment of the present invention will be briefly described with reference to FIG. 2.

Figure 2 shows a schematic flow of a method for providing a ringback tone service according to an embodiment of the present invention.

As shown in FIG. 2, first, the wired subscriber or the mobile communication subscriber of the calling system 100 calls the called party who subscribes to the ringback tone service according to the present invention through the calling party system 100 (S200).

Then, the incoming local exchange 410 checks the subscriber category to check whether the called party subscribes to the ringback tone service (S210).                     

If the test result is that the called party is subscribed to the ringback tone service, the called local exchange 410 triggers the call of the called party to the intelligent network 500 (S220). The intelligent network 500 searches the database and transmits the ringback tone of the called party to the caller system 100 (S230).

At the same time, the service control device 520 recalls the called party system 200 using the service control device initiation call, and the incoming local exchange 410 recognizes that the call is a call called from the intelligent network 500 and attempts to receive the call. (S240).

Thereafter, the called local exchange 410 reports whether the called party responds to the service control device 520 when the called party answers, and the service control device 520 stops transmitting the ringback tone connected to the caller system 100 by the service switch 510. And the connection between the called party system 200 and the calling party system 100, the service exchanger 510 connects the called party system 200 and the calling party system 100 and stops ringback tone transmission to the calling party system 100. (S250, S270).

On the other hand, if the test result in step S201 the called party is not subscribed to the ringback tone service, the general ringback tone stored in the destination local exchange 410 is transmitted to the caller system 100 (S260).

Hereinafter, a service providing process in a ringback tone service system according to an exemplary embodiment of the present invention will be described in detail with reference to FIGS. 3A to 3B.

3A is a diagram illustrating a signal flow for providing a ringback tone service to a called party system 200 in a ringback tone service providing system according to an exemplary embodiment of the present invention.                     

As shown in FIG. 3A, when the caller dials the telephone number of the called party system 200 subscribed to the ringback tone service through the caller system 100 (S300), the called local exchange 410 of the public switched telecommunications network 300 ) First checks whether the incoming call is a call from the originator or the call from the service control apparatus 520 (S301).

That is, the incoming local exchange 410 analyzes the category value of the calling number to determine whether it is a predetermined looping prevention value, and if it is not a looping prevention value, analyzes the prefix information of the called number and checks the subscriber category to ring back tone Check whether you are subscribed to the service (S302 ~ 303). For example, when the caller dials 02-520-XXXX, which is a DID subscriber connected to the destination local exchange 410 through the private exchange 220, such as wired terminals 211 and 212, the destination local exchange 410 Determines whether to subscribe to the ringback tone through 02520, which is the prefix information of the called number. In addition, when the called number is a general subscriber number such as the wired terminal 210, it is determined whether the ringback tone is subscribed with the entire called number.

As a result of the check, if the called party system 200 is subscribed to the ringback tone service, the called local exchange 410 loads the service access code (SAC) and the called party's telephone number in an initial address message (IAM) to provide an intelligent network ( The call is triggered to the service exchange 510 of 500 (S304). At this time, if the called party system 200 is not subscribed to the ringback tone service, the called local exchange 410 sends the ringback tone stored basically to the calling party system 100 and routes the call to the called party system 200.

Meanwhile, the service exchanger 510 triggering the call checks whether the telephone number of the corresponding terminating system 200 is the intelligent network 500 service number through a message transmitted from the incoming local exchange 410, and controls the service if the intelligent network service number is used. The device 520 transmits a message indicating the intelligent network call generation (S305). At this time, the intelligent network call generation message includes the calling number and the corresponding called number.

The service control device 520 receiving the intelligent network call origination message translates the called number included in the intelligent network call originating message and searches for the intelligent additional device 530 in which the ringback tone sound source of the called number is stored in the ringback tone service subscriber database. After transmitting the message requesting the connection to the intelligent additional device 530 to the service exchanger 510 (S306), and receiving a connection completion message from the intelligent additional device 530 (S308), the caller sends the associated ringback tone to the sender. It is required to provide (S312), and at the same time using the service control device 520, the caller is called again the called party (S316).

In more detail, the service exchanger 510 receiving the request from the service control device 520 sends an initial address message (IAM) to the corresponding intelligent additional device 530 to request a call connection ( In step S307, the intelligent additional device 530 transmits an address complete message (ACM) to the destination local exchange 410 through the service exchanger 510 to confirm the connection (S309 to 310). 410 transmits an address complete message (ACM) to the caller system 100 (S311).

Meanwhile, after receiving the call connection request, the intelligent additional device 530 that receives the sound source providing command from the service control device 520 by transmitting a connection completion message to the service control device 520 searches the database 531 of the corresponding number. After finding the corresponding sound source by sending a response message (Answer Message; ANM) to the service exchanger 510 (S313 ~ 314), and transmits the sound source retrieved by the caller system 100 to the ringback tone ( S315).

In this case, the database 531 includes a called party number, a ringback tone code selected by the called party, an Internet Protocol (IP) address where the ringback tone sound source is actually stored, and the like.

On the other hand, the incoming local exchange 410 receiving the caller system call signal checks whether the incoming call is a call from the originator or the service control device 520 in step S301 to prevent looping specified by the category value of the calling number in advance. If the value is called, the caller system 200 is called without triggering the service to the service switcher 510 (S317 to 318). This is to ensure that the incoming local exchange 410 distinguishes a call from the service control device 520 and a call from the originator system 100 so as not to reloop the call from the service control device 520.

When the called party system 200 responds to the call request of the called local exchange 410 (S319), the service switch 510 notifies the service controller 520 of the called party system's response (S320). Then, the service control device 520 requests the service exchanger 510 to release the IP connection with the caller (S321), and the service switcher 510 transmits the ringback tone to the caller system 100 (530). Send a ringback tone truncation message (REL) to the ringbacktone truncation request (S320), and the intelligent additional device 530 terminates the call with the caller system 100 and cuts it to the service exchanger 510. The ringback tone is cut by transmitting a completion message (RELC) (S323).

Thereafter, the service control device 520 requests the call exchanger and the called party to connect to the service switcher 510 (S324), and the service switcher 510 receives the request by sending a response message (ANM) to the caller system 100. The calling system 100 and the called system 200 are connected (S325 ~ 326).

On the other hand, if the called party system 200 does not respond to the call request of the incoming local exchange 410, the service control device 520 disconnects the connection between the intelligent additional device 430 and the caller system 100 to the service exchange 510. End the call after requesting. At this time, in the case of the called party terminal 210 connected directly to the incoming local exchange 410 without passing through the private exchange, the called local terminal 410 does not trigger a call to the service exchange 510 and cuts the call to the calling party system 100. End the call by sending a message (REL).

In addition, when the connection to the intelligent additional device 530 fails in step S307, the service control device 520 does not call the called party system 200 by using the service control device 520 start call using a connection operation. Call the called party system 200 directly.

Meanwhile, FIG. 3B is a diagram illustrating a signal flow for providing a ringback tone service to the called party system 300 in the ringback tone service providing system according to an exemplary embodiment of the present invention.

The called party system 300 is connected to the calling party system 100 through the relay exchange 510 rather than the called local exchange as a DID subscriber connected to the private exchange 310. At this time, the relay switch 510 simultaneously performs the function of the service switch.

That is, as shown in FIG. 3B, when the caller dials the telephone number of the called party system 300 subscribed to the ringback tone service through the caller system 100 (S400), the relay switch 510 of the public switched communication network 300. ) First checks whether the incoming call is a call from the originator or the service control device 520 (S401).

That is, the relay exchange 510 analyzes the category value of the calling number to check whether it is a predetermined looping prevention value, and if it is not a looping prevention value, analyzes the prefix information of the called number and checks the subscriber category to ringback tone service. Check whether you are subscribed to (S402 ~ 403).

If it is determined that the called party system 300 is subscribed to the ringback tone service, the relay switch 510 loads the service access code (SAC) and the called party's telephone number into an intelligent detection point (IDP) message to display the intelligent network ( The call is triggered by the service control device 520 of step 500 (S404).

The service control device 520 receiving the intelligent network call origination message translates the called number included in the intelligent network call originating message and searches for the intelligent additional device 530 in which the ringback tone sound source of the called number is stored in the ringback tone service subscriber database. In operation S405, when the connection to the intelligent additional device 530 is completed, the relay switch 510 transmits a message requesting the sound source to the intelligent additional device 530. And (S410), at the same time transmits a signal for calling the called party system 200 (S414).                     

That is, the relay exchange 510 receiving the call routing request from the service control device 520 sends an initial address message (IAM) to the corresponding intelligent additional device 530 to request a call connection (S406), and the intelligent additional device ( When the connection is confirmed by transmitting an address complete message (ACM) to the relay switch 510 in step 530 (S408), the relay switch 510 transmits an address complete message (ACM) to the caller system 100. (S409).

Meanwhile, after receiving the call connection request, the intelligent additional device 530 that receives the sound source providing command from the service control device 520 by transmitting a connection completion message to the service control device 520 searches the database 531 of the corresponding number. Finds the corresponding sound source and transmits a response message (Answer Message; ANM) to the relay switch 510 (S411 ~ 412), and transmits the sound source searched by the caller system 100 to the ringback tone (S413). ).

On the other hand, the relay switch 510 receiving the called party system call signal checks whether the incoming call is a call from the originator or the service control device 520, and if the category value of the calling number is a predetermined loop prevention value, service control. The caller system 300 is called without triggering the service to the device 520 (S415 ~ 416).

When the called party system 300 responds to the call request of the relay switch 510 (S417), the relay switch 510 notifies the service control device 520 of the called party's response (S418). Then, the service control device 520 requests the IP switch release from the caller to the relay switch 510 (S419), and the relay switch 510 sends the ringback tone to the caller system 100. 530 transmits a ringback tone cutting message (REL) to the ringback tone cutting request (S420), and the intelligent additional device 530 terminates the call with the caller system 100 to the relay exchange 510. The ringback tone is cut by transmitting a cut complete message (RELC) (S421).

Thereafter, the service control device 520 requests the connection between the caller and the called party to the relay switch 510 (S422), and the relay switch 510 receives the request by transmitting a response message (ANM) to the caller system 100. The calling system 100 and the called system 200 are connected (S423 ~ 424).

On the other hand, if the called party system 200, 300 does not respond to the call request of the relay switch 510, the service control device 520 is a connection between the intelligent additional device 430 and the caller system 100 to the relay switch 510. The call is terminated after the release is requested.

In addition, when the connection to the intelligent additional device 530 fails in step S406, the service control device 520 does not call the called party system 300 by using the service control device 520 start call using a connection operation. Call the called party system 300 directly.

On the other hand, the receiver system (200, 300) to receive the ringback tone service according to the present invention can access the network 500 through the receiver terminal (not shown) to apply for the ringback tone service. When applying for the service, the called party can select the telephone number of the called party and the type of ringback tone to be served, and the called party can change the information. In addition, if there is no ringback tone desired by the called party, it can be applied through a bulletin board, e-mail, or the like. If the ringback tone applied by the called party is updated, the called party can be notified and changed.

 Although the preferred embodiment of the present invention has been described in detail above, the present invention is not limited thereto, and various other changes and modifications are possible.

As described above, using the ringback tone service system of the present invention, it is possible to send various ringback tones desired by the called party to the caller using an intelligent network. In addition, the corporate subscriber may send a ringback tone for corporate promotion to the caller calling the corporate subscriber through the ringback tone service of the present invention.

Claims (15)

A method for providing a ringback tone to an originator system calling a called party system connected to an incoming local exchange through an intelligent network system including an intelligent additional device, a service exchanger, and a service control device, a) the called local exchange forwarding the call received from the calling system to the intelligent network system; b) if the intelligent network system checks whether the call transmitted from the called local exchange is an intelligent network service call and transmits a ringback tone prescribed by the called system to the calling system and sends the called party system through the called local exchange. Calling; And  c) if the called system responds, requesting the service control device to connect the calling system with the called system to the service exchange; Ringback tone providing method comprising a. The method of claim 1, B), i) When the service exchanger checks the transferred call and transmits a message informing that the intelligent network call is generated to the service control device when the service call is an intelligent network service call, the intelligent control unit provides the ringback tone sound source to the service exchanger. Sending a message requesting a call connection to the device; ii) if the service exchange sending the message requesting the call connection requests a call connection to the intelligent additional device, and the intelligent additional device confirms the connection to the destination local exchange through the service exchange, the incoming local exchange Notifying the caller system of completion of connection; iii) the intelligent additional device searching for ringback tone information of the called party system, sending a response message to the service exchanger, and then transmitting the retrieved ringback tone to the caller system; And iv) when the service control device transmits a signal for a called party to the called local exchange, the called local exchange examines the received signal and checks whether the call is from the originating system or the call from the intelligent network. Calling the called party system if the call is from; Ringback tone providing method comprising a. The method according to claim 1 or 2, The called local exchange analyzes the calling number category value of the received call and recognizes it as a call from the calling system if it is not a predetermined looping prevention value and delivers the call to the intelligent network, and if it is a looping prevention value, recognizes it as a call from the intelligent network. Calling the called party system How to provide ringback tone. The method of claim 2, In step iii), The ringback tone information of the called party system includes a called number of the called party system, a code of a ringback tone sound source selected by the called party system, and IP address information in which the ringback tone sound source is stored. The intelligent additional device transmits the ringback tone to the caller system by accessing the ringback tone sound source to the IP address through the stored IP address information. How to provide ringback tone. The method of claim 1, d) when the called system sends a response message to the service exchange in response to a call of the called local exchange, the service exchange notifying the service control device of the called system; e) if the service control device requests the service exchange to disconnect from the intelligent attachment, the service exchange requests ringback tone cutting with the intelligent attachment and the intelligent attachment truncates ringback tone transmissions; ; And f) if the service control device requests a call connection of a calling party system and a called party system to the service exchange, the called local exchange sends a response message to the calling system and connects the calling system and the called party system; Ringback tone providing method further comprising. A method for providing a ringback tone to an originator system calling a called party system connected to a relay exchange through an intelligent network system including an intelligent additional device and a service control device, a) forwarding, by the relay exchange, a call received from the originator system to the service control device; b) the service control device confirming whether the call received from the relay switch is an intelligent network service call, and if the intelligent network service call transmits a ringback tone predetermined by the called party system to the calling system, calling the called party system; And c) if the called system responds, requesting the service control device to connect the calling system with the called system to the service exchange; Ringback tone providing method comprising a. The method according to claim 1 or 6, Step a) is Ringback tone providing method for confirming whether or not the caller system subscribes to the ringback tone through the prefix information of the called party called by the caller system. The method of claim 6, B), i) an intelligent addition that checks the forwarded call and transmits a message informing that the intelligent network call is generated to the service control device when the relay exchange checks the transferred call, and the service control device provides the ringback tone sound source to the relay exchange. Sending a message requesting a call connection to the device; ii) when the relay exchange sending the message requesting the call connection requests a call connection to the intelligent additional device and the intelligent additional device confirms the connection to the relay exchange, the relay exchange completes the connection to the calling system. Informing; iii) retrieving ringback tone information of the called party system, sending a response message to the relay exchange, and sending the retrieved ringback tone to the calling system; And iv) when the service control device transmits a signal for a caller's call to the relay switch, the relay switch examines the received signal and checks whether the call is from the originating system or the call from the service control device. Calling the called party system if the call is from a control device; Ringback tone providing method comprising a. The method according to claim 6 or 8, The relay exchange analyzes the originating number category value of the received call and recognizes it as a call from the calling system if it is not a predetermined looping prevention value and delivers the call to the service control device. To recognize the call and to call the called party system How to provide ringback tone. The method of claim 8, In step iii), The ringback tone information of the called party system includes a called number of the called party system, a code of a ringback tone sound source selected by the called party system, and IP address information in which the ringback tone sound source is stored. The intelligent additional device transmits the ringback tone to the caller system by accessing the ringback tone sound source to the IP address through the stored IP address information. How to provide ringback tone. The method of claim 6, d) when the called party system responds to the call of the service control device, the relay switch notifying the service control device of the response of the called party system; e) if the service control device requests the relay exchange to disconnect from the intelligent attachment, the relay exchange requests ringback tone cutting with the intelligent attachment and the intelligent attachment truncates ringback tone transmissions; ; And f) if the service control device requests a call connection between a calling party system and a called party system to the relay exchange, sending the response message to the calling system and connecting the calling system and the called party system; Ringback tone providing method further comprising. A system for providing a ringback tone to a calling party system calling a called party system connected to a called local exchange, An incoming local exchange transferring the call received from the originator system to the intelligent network system; And An intelligent network system for analyzing a call received from the called local exchange and transmitting a ringback tone corresponding to the called party system identification number to the calling system. Including, The intelligent network system, An intelligent additional device for providing a ringback tone corresponding to a called party identification number to the caller system; A service exchanger for verifying whether the call received from the called local exchange is an intelligent network service call and requesting ringback tones if the intelligent network service is a call; And A service control device for controlling a call to be connected to the intelligent additional device in response to a request from the service exchange Including; The called local exchange transfers the received call to the intelligent network system when a call is received from the calling system, and calls the called party system when a call is received from the intelligent network system. Ring back tone providing system, characterized in that. A system for providing a ringback tone to a calling party system calling a called party system connected to an intermediate exchange, A relay switch located in an intelligent network system and transmitting a call received from the originator system to a service control device of the intelligent network system; An intelligent additional device for analyzing a call received from the relay exchange and providing a ringback tone corresponding to the called party identification number; And A service control device for controlling a call to be connected to the intelligent additional device according to the request of the relay exchange. Including; The relay switch forwards the received call to the service control device when a call is received from the originator system, and calls the called party system when a call is received from the service control device. Ring back tone providing system, characterized in that. The method according to claim 12 or 13, Is connected to the intelligent additional device, including a database storing ringback tone information corresponding to the called party identification number, The ringback tone information stored in the database includes a called number of the called party system, a code of a ringback tone sound source selected by the called party system, and IP address information storing the ringback tone sound source. Ringback tone delivery system. The method of claim 12, The called local exchange transfers a call to the intelligent network and simultaneously calls the called party system. Ringback tone delivery system.

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