KR100811407B1 - Apparatus and method for UMS hosting service with open API technologies - Google Patents

Abstract

The present invention relates to an apparatus and method for providing a hosting service of a unified messaging system using an open API (Application Programming Interface) technology that allows a UMS service provider to utilize service resources of an intelligent network providing services in an efficient distributed manner on a public network , ≪ / RTI &

A Unified Messaging Service (UMS) system for providing a hosting service, comprising: a service logic for providing a UMS service; a UMS database storing UMS service data and subscriber data for authentication; A UMS application server configured as a UMS web server for providing UMS service; A voice mail system (VMS), a voice mail system, a voice mail system, and a media converter are connected to a communication network accommodated by a user and connected to a voice mail system (VMS), a fax mail system (FMS) ), A fax mailbox system (FMS), an e-mail transmitter, a voice guide, a media converter; And an open gateway connected to a plurality of UMS application servers through the Internet and interfacing with the intelligent network service system to enable communication between the intelligent network service system and the UMS application server.

Description

Technical Field [0001] The present invention relates to an apparatus and a method for providing a hosting service in a unified messaging service system using an open API (Application Programming Interface)

1 is a diagram for explaining a structure for providing a conventional UMS service;

2 is a block diagram of a main part of a UMS hosting service apparatus using an open API according to an embodiment of the present invention.

3 is an internal configuration diagram of the open gateway 20 shown in Fig.

4 to 7 are scenarios illustrating a method of providing a hosting service of an unified messaging system using open API technology according to an embodiment of the present invention.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and method for providing an unified messaging service system hosting service (hereinafter referred to as "UMS ") using open API (Application Programming Interface) (UMS) service using an open API (Application Programming Interface) technology that allows a UMS service provider to program the various subnetwork functions required for the UMS service through a gateway and host the service in a secure manner for the network operator And more particularly, to a hosted service providing apparatus and method.

Generally, UMS (Integrated Messaging Service) is a service that integrates various messaging services of a telecommunication network and an Internet network based on a subscriber ID.

In other words, the UMS integrates and transmits the message transmission service through different networks and media such as voice mail, fax, and e-mail, and transmits the voice mailbox or the facsimile message left over the telephone by e-mail, To be able to listen through the telephone.

FIG. 1 shows the structure and flow for providing the conventional UMS service. In FIG. 1, reference numeral 100 denotes a whole UMS system. The UMS system 100 includes a voice mail server 101 having a voice mail DB, A facsimile message server 102 with a fax DB, an e-mail server 103 with an e-mail DB, a text-to-speech (TTS) And a speech-to-text (STT) function for combining speech with text, a media converter 104 for transmitting a proper announcement broadcast to a user connected to the UMS system, receiving digits from the user, An interactive voice response (IVR) 108 serving as a voice processing unit, a switching unit 105 for exchanging telephone calls relayed from the external PSTN network with internal system resources, And a UMS subscriber and service DB 107 for storing subscriber data required for service control and data necessary for service processing.

The UMS system provides a function of transmitting and receiving UMS messages by telephone and fax to the telephone user 210 in the public switched telephone network 200, the fax user 301, and the PCS mobile subscriber through the PCS mobile network. In addition, a function of transmitting and receiving a message converted into an e-mail form in the UMS is provided to an Internet terminal user such as a PC through the Internet network 400.

In order to provide the UMS service as described above, the UMS service provider requires a dedicated line for dial-up in the public telephone network and the above-mentioned devices for providing various functions of the UMS service, which is expensive.

Also, since the UMS system corresponds to one node of the network, there is a problem due to the line limitation in handling a large number of calls.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned problems occurring in the prior art, and it is an object of the present invention to provide a UMS hosting service structure and a UMS service providing method that enables a UMS service provider to utilize service resources of an intelligent network, And to provide the above objects.

Another object of the present invention is to provide a structure and method of a UMS service hosting system applying an open API technology that allows a secure method for accessing the intelligent network resources.

According to another aspect of the present invention, there is provided an apparatus for providing a hosting service of an integrated messaging system using an open API technology,

In a Unified Messaging System (UMS) that provides hosting services,

A UMS application server configured with a service logic for providing UMS service, a UMS database storing UMS service data and subscriber data for authentication, and a UMS web server providing UMS service to a user connected via the web;

A voice mail system (VMS), a voice mail system (VMS), a voice mail system, and a media converter are connected to a communication network accommodated by a user and connected to a voice mail system (VMS) ), A fax mailbox system (FMS), an e-mail transmitter, a voice guide, a media converter;

And an open gateway connected to a plurality of UMS application servers via the Internet and interfacing with the intelligent network service system to enable communication between the intelligent network service system and the UMS application server.

Also, a method of providing a hosting service of an integrated messaging system using an open API technology according to an embodiment of the present invention includes:

A method of providing a hosting service applied to an Unified Messaging Service (UMS) system in which an intelligent network service system and an UMS application server are connected through an open gateway,

A first step of, when a UMS service is requested from a user to a subscriber through the intelligent network service system, the open gateway accessing the UMS application server and reporting a UMS service request to a subscriber;

A second step of the UMS application server requesting resource connection and user information collection to the intelligent network service system through the open gateway;

After the intelligent network service system makes a resource connection, it broadcasts an announcement for collecting user information to the user, and when a digits corresponding to user information is inputted from the user, it is transmitted to the UMS application server through the open gateway A third step of:

When the UMS application server requests the message recording, the intelligent network service system transmits a voice announcement for voice message input to the user. When the voice message is input from the user, the UMS application server stores the voice message in the VMS, To the UMS application server.

Also, a method of providing a hosting service of an integrated messaging system using an open API technology according to an embodiment of the present invention includes:

A method of providing a hosting service applied to an Unified Messaging Service (UMS) system in which an intelligent network service system and an UMS application server are connected through an open gateway,                     

A first step of, when a UMS service is requested from a subscriber through the intelligent network service system, the open gateway accessing the UMS application server and reporting a subscriber's UMS service request;

A second step of the UMS application server requesting resource connection and user authentication information collection to the intelligent network service system through the open gateway;

After the intelligent network service system makes a resource connection, it broadcasts an announcement for collecting user authentication information to the user, and when a digits corresponding to the user authentication information is input from the subscriber, A third step of transmitting the data to the mobile station;

The UMS application server performs a user authentication procedure based on the digits, and if the subscriber is a registered subscriber, the UMS application server transmits a message ID for the voice message stored in the subscriber to the IN service system;

And a fifth step of the intelligent network service system extracting a voice message according to the message ID from the VMS, reproducing the voice message, delivering the voice message to the subscriber, and reporting the voice message delivery to the UMS application server.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is a block diagram of a main part of an apparatus for providing UMS hosting service using an open API technology according to an embodiment of the present invention. Referring to FIG. 2, an intelligent network service providing public service on a PSTN network 200 and a PCS network 300 The system 10 is equipped with the following additional devices. That is, the voice mail system (VMS) 101, the fax mailbox system (FMS) 102, the voice guidance apparatus 40, and the media converter 104, which is a device for converting text into voice, And an email transmitter (103) capable of sending email to an email server.

And an INAP interface with an open gateway 20 for opening the public intelligent network resources to a third party in a secure manner. A UMS service provider that utilizes the resources of the public network on the Internet can be a plurality of providers (provider 1 to provider n), each of which has UMS application servers 30. The UMS application server 30 provides a UMS service according to the UMS service logic 106 to a UMS DB 107 including UMS service data 106 and UMS service data and subscriber data, And a Web server 31 that is connected to the Internet.

The system configuration of the open gateway 20 shown in FIG. 2 will be described in more detail with reference to FIG.

The open gateway 20 is connected to an INAP (Intelligent Network Application Part) protocol 28 and other network protocols such as Wireless Intelligent Network (WIN), Mobile Application Part (MAP) and CAMEL Application Part In the case of the Internet network, it has protocols such as SIP (Session Initiation Protocol) and H.323, which can be included according to the range of the network covered by the gateway. The framework 22 is a function that abstracts the function of the network to be opened as a component, and includes a framework 22 for performing security for malicious or malicious requests by performing authentication and authority verification of requests of external servers to be hosted, A call control unit 23 which integrates a call control related message processing unit on an external network and provides an abstracted call control API to an external service provider, a message control unit 23 which integrates a messaging control function on multiple networks and provides an abstracted message control function A control unit 24, and a request of external servers to be hosted, which collects a response string, a response voice, and the like through service announcement or string transmission to the user including voice guidance, digit collection and text spamming Is wrong by doing authentication and authorization A framework 22 for security against malicious requests, a call control unit 23 for integrating a call control related message processing unit on multiple network protocols and an external call control API to an external service provider, a messaging control A message control unit 24 that integrates functions and provides an abstracted message control function to an external service provider, and a service guide unit 24 that guides the user through announcement broadcasting or string transmission, including voice guidance, digit collection, and text spamming, And a user interaction section 25 for collecting a response voice or the like.

The open gateway 20 includes an OAM 27 related to operational management such as statistical traffic in an open gateway, a service DB 26 for managing information of external application servers subscribed to the UMS service, such as e-mail addresses, And an open API block 21 that allows the open gateway 20 to match the UMS application server 30 on the external Internet network.

In the case of a request from an application server, the request is received by the open API 21, and then the functional procedure is performed by the corresponding component. Then, the protocol is converted into a network protocol for transmission to the lower network and transmitted. Is similarly transmitted to the application server via the open API 21 after execution of the corresponding component.

The structure of this open gateway system and the specifications of the open API are described in Parlay [www.parlay.org] and JAIN (Java APIs for Intergrated Networks) [java.sun.com/products/jain/], 3GPP [www.3gpp.org] And Parlay API (2.1), which is a standard that is being standardized in the Internet.

Hereinafter, a method of providing a hosting service of an unified messaging system using an open API technology according to an embodiment of the present invention will be described in detail with reference to the attached scenario.

FIG. 4 is a scenario in which a UMS user leaves a message by voice to a UMS subscriber via telephone, FIG. 5 is a scenario in which a remaining voice message is converted into text and transmitted to an email address of the subscriber, Figure 7 is a scenario in which a subscriber hears a voice message left in a voicemail via a telephone by requesting to send a text message at a specific time and sending it to the subscriber's telephone.

Referring to FIG. 4, when the telephone user presses the service number of the UMS service provider, for example, 03030-111-2222 to use the UMS service (S401_, the intelligent network service system 10 uses the service number as the hosting service The open gateway 20 receives the initial detection message (InitialDP) to request the service trigger from the open gateway 20. The open gateway 20 receives the service trigger from the INAP unit 28, 23, the call processing unit 23 confirms whether the service provider corresponding to the service number is a registered service provider, and if it is confirmed as a registered service provider, The UMS application server 30 retrieves the UMS application server address of the UMS application server 30 and accesses the UMS application server 30 to send a call event notification message (callEventNotify) 0) indicating that a call request has arrived (S403).

The UMS application server 30 then sends an event report request message (eventReportReq) to the open gateway 20 to monitor events related to the outgoing call and sends a user call interaction message (creatUICall) to the open gateway 20 send. The open gateway 20 transmits a BCSM event report request message (RequestReportBCSMEvent) to the intelligent network service system 10 (S405), and creates an instance of the user interaction unit 25. [

The UMS application server 30 transmits an information transfer and collection message (sendInfoAndCollectReq) to the open gateway 20 to perform a procedure for announcement and digit collection for allowing the user to leave a message in the voice mailbox (S407).

The open gateway 20 having received the information delivery and collection message (sendInfoAndCollectReq) transmits a resource connection message (ConnectToResource) to the intelligent network service system 10 (S408), and transmits a user information collection request message (PromptAndCollectUserInformation.req) (S409). After the intelligent network service system 10 connects the channel between the voice guidance apparatus 40 and the user, a voice announcement for collecting user information stored in the voice guidance apparatus 40, for example, Quot; 1 ", and press 2 " to leave the contact number ", and outputs it to the user terminal (telephone) (S410-1).

When the digit corresponding to "1" is input from the user terminal in response to the output (S410-2), the intelligent network service system 10 transmits a user information collection response message (PromptAndCollectUserInformation.req) to the open gateway 20 The open gateway 20 having received the user information collection response message (PromptAndCollectUserInformation.req) transmits an information transfer and collection response message to the UMS application server 30 in step S411.

The UMS application server 30 transmits a message recording request message (recordMessageReq) to the open gateway 20 for voice message recording and the open gateway 20 receiving the message recording request message (recordMessageReq) The intelligent network service system 10 transmits a message reception request message (PromptAndReceiveMessage.req) to the voice guidance apparatus 40 (step S410-3) Record the beep "and output it to the user terminal (S414-1).

When the user terminal performs voice recording in response to the voice announcement (S414-2), the intelligent network service system 10 stores the recorded voice message in the VMS 101 and transmits a message including the generated message ID And transmits a message response message (recordMessageRes) including the message ID to the UMS application server 30 via the open gateway 20 by sending a response message (PromptAndReceiveMessage.resp) to the open gateway 20 at step S414-3. (S415).

In this state, if the user disconnects the call and a disconnect message is transmitted from the user terminal (S416), the intelligent network service system 10 transmits a BCSM event report message (EventReportBCSM) to the open gateway 20 (S417) The open gateway 20 transmits an event report response message (eventReportRes) to the UMS application server 30 (S418), and transmits to the UMS application server 30 that all procedures for recording a voice message from a predetermined user have been completed.

On the other hand, the UMS service logic 106 of the UMS application server 30 confirms whether the subscriber has registered transmission of the voice mail message on the basis of the setting value of the UMS DB 107 in which the subscriber information is stored, The open gateway 20 transmits the call creation message creatCall to the open gateway 20 via the open API 21 and transmits it to the call control section 23, Is transmitted to the intelligent network service system 10 by a InitiateCallAttempt message (S502). In this case, in order to make the call initiation message used for call forwarding suitable for e-mail transmission, the call destination number parameter includes an e-mail address according to the data number planning parameter of the INAP standard. That is, according to the present invention, when the call destination number is a telephone call, the telephone call connection is performed in the call attempt initiation parameter, and if the call destination number is an e-mail address,                     

Next, the UMS application server 30 transmits a user interaction call creation message (createUIcall) to the open gateway 20 (S503), and the open gateway 20 which received the user call interaction creation message (createUIcall) After generating an instance in the user interaction unit 25, a resource connection message is transmitted to the intelligent network service system 10 (S504).

Next, the UMS application server 30 transmits an information delivery message (sendInfoReq) including the ID of the message to be provided and the email address of the subscriber to the open gateway 20 (S505), and transmits the information delivery message sendInfoReq The open gateway 20 transmits an announcement message (PlayAnnouncement) including the ID of the message to be provided, the e-mail address and the message conversion command to the intelligent network service system 10 (S506).

The intelligent network service system 10 having received the announcement message (PlayAnnouncement) extracts a voice message to be provided from the VMS 101 using the message ID and transmits the extracted voice message to the media converter 104 And then transmits the text message to the e-mail transmitter 103 so that the e-mail message stored in the VMS 101 by the e-mail transmitter 103 is transmitted via e-mail (S507).

The intelligent network service system 10 that has completed the e-mail transmission transmits a special resource response message (SpecializedResourceReport) to the open gateway 20 in step S508. The open gateway 20, which has received the special resource response message (SpecializedResourceReport) The UMS application server 30 having received the information delivery response message (sendInfoRes) transmits the release message to the open gateway 20 (S510) ).

The open gateway 20 sequentially transmits a DisconnectForwardConnection message and a ReleaseCall message to the intelligent network service system 10 to release resources and calls (S511 and S512).

Hereinafter, a process of transmitting a text message stored via the web to a voice message will be described with reference to FIG.

When a user accesses the UMS service web server 31 on the Internet to designate a single recipient or a plurality of recipients, inputs a text message to be transmitted in a state where a time to transmit the message is specified, and then requests transmission (S601) The UMS application server 30 monitors the message delivery time and transmits a mailbox open message (openMailbox) to the open gateway 20 when it reaches the delivery time (S602).

The open gateway 20 having received the mailbox open message transmits an open call initiation message (InitiateCallAttempt) to the intelligent network service system 10 in step S603, transmits a resource connection message (ConnectToResource) (S605).

Upon receiving the call initiation message (InitiateCallAttempt), the intelligent network service system 10 transmits a setup message to the called subscriber to initiate a call setup for delivering a voice message (S604).                     

Subsequently, the UMS application server 30 transmits a message period request message (putMessage.req) including the text message requested to be delivered (S606), and transmits the message period request message (putMessage.req) to the open gateway 20 Transmits the announcement message (PlayAnnouncement) including the text message and the message change command to the intelligent network service system 10 through the parameter for transmitting the text field.

The intelligent network service system 10 transmits a text message included in an announcement message (PlayAnnouncement) to the media converter 104, converts the text message into voice daisy, and then, when the called subscriber is in a hook-off state (S608). When the transmission of the voice message is completed, a special resource report message (SpecializedResourceReport) for reporting a successful transmission is transmitted to the open gateway 20 (S609).

The open gateway 20 having received the special resource report message transmits a message period response message (PutMessage.resp) to the UMS application server 30, and the UMS application server 30 transmits a resource and a call release message The open gateway 20 transmits the close message to the intelligent network service system 10 in step S611 and sequentially transmits a forward connection release message and a release release message to the intelligent network service system 10, And releases the resources and calls (S612, S613).

Next, a process of listening to a voice message stored by a subscriber using a telephone will be described with reference to FIG.                     

When the subscriber inputs the subscriber number (03030-111-3333) through the telephone and accesses the intelligent network service system 10 (S701), the intelligent network service system 10 transmits the subscriber number It determines that the service call is a hosting service and transmits an initial detection message (InitialDP) to the open gateway 20 (S702). The open gateway 20 receives the information through the INAP unit 28 to create an instance of the call control unit 23 and then transmits the UMS service provider The UMS application server 30 extracts the IP address of the UMS service provider and accesses the UMS application server 30, and then transmits a call event notification message (calleventNotify) to the UMS application server 30, (S703).

The UMS application server 30 having received the call event notification message (calleventNotify) transmits a user call interaction generation message (createUICall) to the open gateway 20 for resource connection (S704) (sendInfoAndCollectReq) (S706), the open gateway 20 receives the user call interaction creation message (createUICall) and transmits a resource connection message (ConnectToResource), which is an INAP message, to the intelligent network service system 10, (PromptAndCollectUserInformation.req) to the intelligent network service system 10 in response to the information delivery and collection message (sendInfoAndCollectReq) (S707).

Then, the intelligent network service system 10 reproduces a voice message for the subscriber authentication stored in the voice guidance apparatus 40, for example, "Please press the password ", and sends it to the subscriber side (S708-1) When the digit corresponding to the number, for example, "1234" is input (S708-2), the intelligent network service system 10 transmits a user information collection response message (PromptAndCollectUserInformation.resp) including the digit information to the open gateway 20 S708-3).

Then, when the open gateway 20 transmits an information transmission and collection response message (sendInfoAndCollectRes) including the digits to the UMS application server 30, the UMS application server 30 transmits the information to the corresponding subscriber And then transmits an information delivery message including a message ID corresponding to the voice message stored in the subscriber to the subscriber if the subscriber is registered as a result of the confirmation, sendInforeq).

The open gateway 20 having received the information delivery message sendInforeq transmits an announcement message (PlayAnnouncement) including the message ID to the intelligent network service system 10 at step S711, The VMS 101 searches for a voice message based on the message ID, reproduces the voice message retrieved to the subscriber, and outputs the voice message in operation S712-1.

The intelligent network service system 10 then sends a Specialized ResourceReport to report the successful announcement delivery to the open gateway 20 and the open gateway 20 sends information to the UMS application server 30 And transmits a response message (sendInfoRes).                     

Thereafter, a similar procedure is repeated to allow the subscriber to listen to or manage the voicemail box.

3 to 7 are examples of scenarios selected to illustrate the merits of the present invention, such as forwarding a fax message by e-mail, listening to an e-mail by voice, notifying a text message and a voice message to a voice message at a specified time, Such as facsimile transmission, can realize various possible scenarios with the function of UMS.

3 to 7, the INAP protocol is used for communication with the gateway, assuming that the public network system is a wired intelligent network. However, when the network system is a mobile network service system, MAP, CAP, WIN, and public Internet VOIP In case of the service system, it can be applied to H.323, SIP, etc., so that it can be equally applied to the interaction method between the open gateway and the network system pursued by the present invention.

Accordingly, such conventional expansion functions should be considered to be included in the technical scope of the present invention.

As described above, according to the present invention, there is an advantage that a rich UMS service provider's service can be used in the Internet environment for a subscriber. In the UMS service provider who is a special service provider, only the UMS service logic and subscriber DB The service provider can utilize the service as it is, and the advantage of the network provider is to increase the profit and the usage rate of the existing network resources by increasing the profit and the call rate through the service hosting.                     

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the scope of the appended claims. will be.

Claims (8)

In a Unified Messaging Service (UMS) system that provides hosting services, A UMS application server configured with a service logic for providing UMS service, a UMS database storing UMS service data and subscriber data for authentication, and a UMS web server providing UMS service to a user connected via the web; A voice mail system (VMS), a voice mail system (VMS), a voice mail system, and a media converter are connected to a communication network accommodated by a user and connected to a voice mail system (VMS) ), A fax mailbox system (FMS), an e-mail transmitter, a voice guide, a media converter; And an open gateway connected to a plurality of UMS application servers via the Internet and connected to the intelligent network service system to perform interfacing so as to enable communication between the intelligent network service system and the UMS application server. A device for providing a hosted service in a unified messaging system. The method according to claim 1, The open gateway includes an INAP unit for processing an INAP protocol according to connection with a wired network, an other protocol processing unit for processing another protocol, an OAM for managing operation in the open gateway, an external application server A call control module that integrates call control related message processing units on multiple network protocols and provides an abstracted call control API to an external service provider, A message controller for providing an abstracted message control function to an external service provider, a voice guidance and digit collection, and a text prompting to provide guidance to a user through announcement broadcasting or string transmission, My back House for user interaction portion and; And an open API for performing registration with the UMS application server through the Internet. The apparatus for providing a hosting service of an integrated messaging service system using an open API technology. The method according to claim 1, Wherein the intelligent network service system reports the UMS application server to the UMS application server through the open gateway when the UMS service is requested by the user and provides the UMS service to the user according to the request from the UMS application server, An apparatus for providing a hosted service in a unified messaging service system using open API technology. The method according to claim 1, The intelligent network service system transmits a message ID corresponding to the data stored in the VMS or the FMS to the UMS application server. When the user requests a message confirmation, the UMS application server transmits the message ID to the intelligent network service system Wherein the intelligent network service system extracts a message stored in the VMS or the FMS using the message ID and outputs the extracted message to the user terminal. A method of providing a hosting service applied to an Unified Messaging Service (UMS) system in which an intelligent network service system and an UMS application server are connected through an open gateway, A first step of, when a UMS service is requested from a user to a subscriber through the intelligent network service system, the open gateway accessing the UMS application server and reporting a UMS service request to a subscriber; A second step of the UMS application server requesting resource connection and user information collection to the intelligent network service system through the open gateway; After the intelligent network service system makes a resource connection, it broadcasts an announcement for collecting user information to the user, and when a digits corresponding to user information is inputted from the user, it is transmitted to the UMS application server through the open gateway A third step of: When the UMS application server requests the message recording, the intelligent network service system transmits a voice announcement for voice message input to the user. When the voice message is input from the user, the UMS application server stores the voice message in the VMS, To a UMS application server. The method of claim 1, wherein the method comprises: 6. The method of claim 5, And transmitting the message ID and the text conversion command to the intelligent network service system through the open gateway when the subscriber is confirmed as a subscriber who has registered the conversion into text data as a result of the confirmation by the UMS application server, Extracting a voice message stored in the VMS using the message ID, converting the extracted voice message into text data, and transmitting the text message to a text output device. The method for providing a hosting service of an integrated messaging service system using an open API . A method of providing a hosting service applied to an Unified Messaging Service (UMS) system in which an intelligent network service system and an UMS application server are connected through an open gateway, A first step of, when a UMS service is requested from a subscriber through the intelligent network service system, the open gateway accessing the UMS application server and reporting a subscriber's UMS service request; A second step of the UMS application server requesting resource connection and user information collection to the intelligent network service system through the open gateway; After the intelligent network service system makes a resource connection, it broadcasts an announcement for collecting user information to the user, and when a digit corresponding to the user authentication information is inputted from the subscriber, it is transmitted to the UMS application server through the open gateway A third step of transmitting; The UMS application server performs a user authentication procedure based on the digits, and if the subscriber is a registered subscriber, the UMS application server transmits a message ID for the voice message stored in the subscriber to the IN service system; And a fifth step of the intelligent network service system extracting a voice message according to the message ID from the VMS, reproducing the voice message, transmitting the voice message to the subscriber side, and reporting the voice message delivery to the UMS application server. A method for providing a hosted service in a unified messaging service system using API technology. A method of providing a hosting service applied to an Unified Messaging Service (UMS) system in which an intelligent network service system and an UMS application server are connected through an open gateway, When a subscriber connected to the UMS application server via the Internet requests transmission of a text message in a state in which a delivery time and a destination number are designated, the text message is stored, and when the delivery time arrives, A first step of requesting an intelligent network service system to make a call attempt to a destination number; A second step of instructing conversion of the text data into a voice message while transferring the stored text data to the intelligent network service system when the terminal of the called number answers the call; A third step of the intelligent network service system converting the text data into a voice message, sending the voice message to the terminal of the called number, and reporting the voice message delivery to the UMS application server; And a fourth step of the UMS application server requesting call release to the intelligent network service system through the open gate weight.

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