KR20040041908A - Method Realizing Addition Function In Voice over Internet Protocol - Google Patents

Abstract

PURPOSE: A supplementary function implementing method in a VoIP network is provided to maintain continuity for a user by setting and releasing a service of an exchange independently connected to a gateway by using a function code. CONSTITUTION: In case of a call forwarding, when an FAX(Foreign Exchange Station) subscriber(500) makes a hook flash to a first gateway(510), the first gateway(510) transfers the hook flash to a second gateway(530). Then, a call is forwarded through an FXO(Foreign eXchange Office) accommodated in a PBX(Private Branch eXchange)(540) upon listening to a second origination sound. In case of a call distribution service, the FAX subscriber(500) listens to an exchange origination sound, registers by inputting a terminating call forwarding function code. The registered service is made in the exchange(540) irrespective of the first gateway(510) and the subscriber receives a corresponding service.

Description

Method for implementing add-on in VIO IP network

The present invention relates to a method for providing an additional service to a subscriber accommodated at a gateway in a Voice over Internet Protocol (VoIP) network, and in particular, a legacy in which the subscriber is not defined in the VoIP recommendation. The present invention relates to a method of exchanging subscriber information between interworking gateway devices and setting and releasing additional functions of the exchange by using the same.

Subscribers who make voice calls using the Internet Protocol (hereinafter referred to as IP) rather than the conventional Public Switched Telephone Network (PSTN) are not only general voice calls but also various additional services such as call transfer and call. Voice call configured in IP network to receive Call Diversion / Forwarding, Call Hold, Call Park, Call Pickup, Call Waiting, etc. A gateway to set up a route, a call agent or a gate keeper that manages flows such as call setup and release on an IP network are provided in an organic manner.

Referring to FIG. 1, subscribers directly accommodated in the PSTN 23, the private network 24, or the gateway of the H.323 network configuration receive subscribers to each gateway device 11-14 or gatekeeper 4 in order to receive additional services. Set additional services by star or corresponding number. At this time, the gatekeeper 4 manages the service information as shown in Figs. 2 and 3 and provides a service for establishing a direct or detour call.

If the call is transferred, the gateway device detects a hook flash, detects a number to be transferred, and controls new call setup and call termination.

On the other hand, in the case of using the H.450 as shown in Figure 4 when the first end (End Point 1, 410) to transfer the information to the second end (End Point 2, 420), the second end ( 420 sets the call to the third end (End Point 3, 430) to be switched to complete the call setup. Then, the second end 420 releases the call connection with the predetermined first end 410 and the call connection with the third end 430 is made.

In the case of call distribution, the gateway or gatekeeper switches to the registered number according to the call setup mode. At this time, as with the call transfer, a new call is attempted and then terminated with the existing call setup.

As described above, in the conventional method of providing a call service, a gateway or a gatekeeper sets standards such as an International Telecommunications Union (ITU-T) and an Internet Engineering Task Force (IETF) for each function, and implements them accordingly.

Such a conventional call service providing method causes a problem that a user does not receive a service that the user has previously used when there is a problem of mutual compatibility of call processing of various manufacturers.

Accordingly, an object of the present invention is to provide a method for providing subscriber information between gateway devices newly interworking in a VoIP network.

Another object of the present invention is to provide a method for activating and releasing an additional function of an exchange by interworking with an exchange not defined in the VoIP recommendation in a VoIP network.

The present invention for achieving the above object is a structure in which a user receiving a voice service using an IP network interlocks with a private exchange, and the user is provided with an additional service of an interlocked exchange rather than a function added to the gateway.

According to an embodiment of the present invention, a first process of establishing a call between the subscriber and the exchange period through a first gateway connected to an FXS subscriber and a second gateway connected to an FXO exchanger; A second step of delivering information of an FXS subscriber to the exchange by a message at the first gateway; A third function of providing the service of the exchange to the subscriber by using the information received from the exchange is characterized in that the additional function is implemented in the VIP network. In addition, the present invention is characterized in that for transmitting the information of the subscriber in a hook flash method in the second process. In another aspect, the present invention is characterized in that the information of the subscriber is delivered in a DTMF method in the second process. In addition, the delivery method in the present invention is characterized in that for transmitting to the counterpart gateway using an alphanumeric field of the H.245 user input recognition message.

1 illustrates a typical H.323 network configuration and network elements.

2 is a diagram illustrating a procedure for establishing a call directly through a conventional H.323 network.

3 is a diagram illustrating a procedure for establishing a bypass call through a conventional H.323 network.

4 is a diagram illustrating a procedure of processing an additional service for a conventional H.450.

5 illustrates a network configuration and network elements for providing an additional service according to the present invention.

6 is a diagram illustrating a call processing procedure at the end according to a specific embodiment of the present invention.

* Description of symbols on the main parts of the drawings *

6: Main Controlling Unit (MCU)

22: Integrated Services Digital Network

23: Public Switched Telephone Network (PSTN)

500: subscriber terminal

510: first gateway

520: Internet

530: second gateway

540: private exchange

FXS: Foreign Exchange Station

Foreign Exchange Office (FXO)

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

According to the present invention, a user receiving a voice service using an IP network is connected to a private exchange 540 as shown in FIG. Receive.

According to a specific embodiment of the present invention, the telephone 500, the foreign exchange station (FXS), the first gateway 510, the network 520, the second gateway 530, the FXO (Foreign Exchange Office) and the private exchange 540 The network configuration of applies. If the destination interface is other than FXO, the received hook flash is ignored. In addition, hook flash transmission is possible only when the connection between the gateway and the exchange is connected.

Referring to FIG. 5, when the subscriber 500 accommodated in the FXS of the first gateway 510 picks up the receiver to set up a basic call, the first gateway 510 is a counterpart gateway which is interworking with the private exchange 540. By setting up a call to the second gateway 530, the subscriber 500 can hear the dial tone of the private exchange 540, and receive all of the exchange services as if it were a general accepted subscriber of the exchange.

In the case of call transfer according to the present invention, when the FXS subscriber 500 hooks a flash to the first gateway 510 in order to divert the other party on the call, the first gateway 510 sets the hook flash to the second gateway ( 530, and the second ring tone is heard through the FXO received at the private exchange 540 to transfer the call. In this case, the hook flash or dual tone modulation frequency (DTMF) transmission scheme transmits to the second gateway 530 using an alphanumeric field of the H.245 user input indication message.

On the other hand, in the case of a call distribution service according to the present invention, the FXS subscriber 500 hears an exchange ring tone, inputs a call forwarding function code of the exchange 540, and registers the registered service, regardless of the first gateway 510. The service is made in the exchange 540 and the subscriber is provided with the corresponding service.

6 is a call procedure diagram for call establishment between two ends according to a specific embodiment of the present invention. Here, the H.225 message is a Q.931 message and a RAS (Registration, Admission, Status) message for call setup. In addition, the H.245 message is used to open an exchange capability set, a master / slave determination, logical signaling, an audio / video RTP, and an RTCP connection. And so on.

As described above, in the configuration in which the FXS receiving subscriber of the gateway is accommodated in the exchange by the FXO of the counterpart gateway, the service of the exchange independently connected to the gateway can be deconfigured by using a function code.

Therefore, the present invention has the advantage that the user can use all the functions of the exchanger in the head office when using the gateway system to maintain the continuity of use, and can receive additional services.

Claims (4)

In the method of implementing the additional function in the VIP network, Establishing a call to a first gateway connected to an FXS subscriber and a second gateway linked to an FXO switch; A second process of transmitting, by the first gateway, information of an FXS subscriber to the exchange through the second gateway as a message; And a third process of providing a service to the subscriber by using the received information in the exchange. The method of claim 1, And transmitting the subscriber information in a hook flash manner in the second process. The method of claim 1, The method of implementing the additional function in the BIP network, characterized in that for transmitting the information of the subscriber in the second process in a DTMF method. The method according to claim 2 or 3, The information transmission method is characterized in that for transmitting to the second gateway using an alphanumeric field of the H.245 user input recognition message.