KR100475373B1 - Keyphone system accepting internetphone and method for controling call thereof - Google Patents

Abstract

The present invention relates to a key phone system. In particular, the present invention relates to a key phone system and a call control method using the same to accommodate an Internet phone using another call control method to efficiently make a call connection with a key phone terminal.

The present invention stores an extension number for an Internet phone terminal in advance from a key phone controller and maps it to a transmission address in a gatekeeper. In this case, when the call connection request is received through the input of the extension number at the key phone terminal, the caller is requested by calling the corresponding Internet phone terminal by extracting a transport address using the extension number. A call connection is made to.

Therefore, it is expected to contribute to the integration of the communication network by accommodating the Internet phone terminal in the key phone system.

Description

Key Phone System Accepting Internet Phones and Call Control Method Using Them {KEYPHONE SYSTEM ACCEPTING INTERNETPHONE AND METHOD FOR CONTROLING CALL THEREOF}

The present invention relates to a key phone system, and more particularly, to a key phone system accommodating an internet phone for performing efficient call interworking between a key phone system employing different call control methods and an internet phone system.

Nowadays, almost all companies and offices are equipped with a keyphone system. The keyphone system is also referred to as a private branch exchanger. The key phone system serves to connect the trunk lines and the stations with each other by a telephone line (commonly referred to as a trunk line) in the premises exchange facility and the belonging switching handling section. In particular, in the key phone system, the interconnection between each extension, that is, the call extension function, is one of important functions for efficient business processing. The key phone system assigns an address to the corresponding station according to the E.164 addressing method.

On the other hand, the Internet phone system consists of an Internet phone, a gatekeeper and a gateway, and call control is performed based on H.323. The Internet phone is a dedicated terminal having a VoIP function connected to a LAN line to access the Internet network. The gatekeeper performs an H.323 ID, for example, address translation between a name or mail address and a transport address, permission control for LAN access, bandwidth control, local management, and call control signaling.

The gateway is connected between an internet phone dedicated network and an external network (eg, PSTN network) to connect between an internet phone and a terminal of an external network.

Recently, in view of the integration trend of the communication network, research on the integration of the key phone system and the Internet phone system has been actively conducted.

As already described, the key phone system performs the connection processing for the call according to the E.164 scheme, whereas the Internet phone system is the H.323. It performs connection processing on the call according to the method.

However, as described above, since both systems perform call connection processing in different ways, many problems arise in realizing efficient call control through integration of both systems. That is, when both systems are integrated, an extension number must be assigned to the Internet phone in order to use the Internet phone in a key phone system. However, since the call control method of the two systems is different, the extension number for the Internet phone cannot be assigned. The synergy effect of the integration of both systems is halved.

As a result, call connection by mutual interworking between the two systems is urgently needed.

The present invention has been made to solve the above problems, an object of the present invention is to provide a key phone system that accommodates an Internet phone that can be assigned an extension number to the Internet phone through the interworking of different systems.

According to a preferred embodiment of the present invention for achieving the above object, a key phone system that accommodates an Internet phone is a key phone terminal for requesting a call connection by inputting an extension number assigned to the Internet phone terminal; A key phone controller which checks whether the Internet terminal is a target for call connection based on the extension number received from the key phone terminal, and transmits the extension number; A gatekeeper for searching for and transmitting a transmission address corresponding to the extension number received from the keypad controller; And an internet phone terminal for performing a call connection by sending a call connection signal to the key phone terminal in response to the transmission address received from the gatekeeper.

The transmission address is stored together with the terminal identifier to be mapped to the extension number assigned to the Internet phone terminal by the registration request of the Internet phone terminal.

According to another preferred embodiment of the present invention, a call control method using a key phone system that accommodates an Internet phone includes: assigning an extension number corresponding to the terminal identifier provided according to a registration request of an Internet phone terminal; Storing the allocated extension number to be mapped with the terminal identifier; Requesting a call connection to the internet terminal using the extension number; Requesting a call connection to the Internet phone terminal by searching for a transmission address corresponding to the extension number; And making a call connection between the key phone terminal and the internet phone terminal in response to a call connection signal to the transmission address.

Herein, the allocation of the extension number is requested through a REQUEST REGISTRATION message including a terminal identifier. In addition, the assignment response to the request for the extension number assignment is made through a RESPONSE REGISTRATION message including the extension number.

According to another preferred embodiment of the present invention, a method for allocating an extension number to an Internet phone in a key phone system includes: requesting an extension number assignment using a terminal identifier of the Internet phone terminal; Allocating a corresponding extension number based on the terminal identifier; And storing the assigned extension number together with the terminal identifier and the transport address.

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

1 shows a configuration of a key phone system accommodating an internet phone according to a preferred embodiment of the present invention. Referring to FIG. 1, a key phone system accommodating an internet phone includes a key phone terminal 100, a key phone controller 120, a gatekeeper 140, and an internet phone terminal 160.

The key phone terminal 100 is a terminal to which an extension number is assigned according to an E.164 addressing method, and may use the extension number to make a call connection with the outside.

The key phone controller 120 allocates an extension number at the request of the key phone terminal 100 and stores and manages the assigned extension number along with the key phone terminal identifier. Here, the terminal identifier refers to a unique identifier of the Internet phone terminal 160, for example, a telephone name or an e-mail address.

In addition, the key phone controller 120 allocates the extension number to the Internet phone terminal 160 in response to the extension number allocation request of the Internet phone terminal 160, and sends it to the gatekeeper 140 for storage. To control.

When the key phone controller 120 receives a call connection request for the Internet phone terminal 160 from the key phone terminal 100, the key phone controller 120 uses the extension number input from the key phone terminal 100. Check if 160 is a call connection target.

The gatekeeper 140 sends the terminal identifier of the Internet phone terminal 160 to the keeper controller according to a registration request of the Internet phone terminal 160, and sends the extension number assigned by the keeper controller based on the terminal identifier. Received and stored together with the terminal identifier and the transport address, and to be mapped to the terminal identifier. At this time, the transmission address of the Internet phone terminal 160 is also stored. Here, the transmission address indicates the address of the Internet phone, and can send a call connection or data to the Internet phone terminal 160 through the transmission address.

When the gatekeeper 140 receives the extension number corresponding to the Internet phone terminal 160 from the key phone controller 120, the gatekeeper 140 searches for a corresponding transmission address using the extension number and corresponds to the transmission address. Attempts to connect to the Internet phone terminal 160. In this case, when the Internet phone terminal 160 generates a call connection signal in response to the call connection attempt, a call connection is made between the Internet phone terminal 160 and the key phone terminal 100.

In order to control a call connection using a key phone system accommodating the Internet phone configured as described above, an extension number must be assigned to the Internet phone terminal 160.

2 illustrates a method for allocating an extension number to an internet phone terminal in a key phone system accommodating an internet phone according to a preferred embodiment of the present invention. Referring to FIG. 2, first, the Internet phone terminal 160 to which its extension number is to be allocated finds the gatekeeper 140 using a gatekeeper request (GRQ) message (S 211). As such, the process of finding the corresponding gatekeeper using the GRQ message is already known, and thus, further description thereof will be omitted.

The Internet terminal requests the gatekeeper 140 to allocate the extension number using a Registration Request (RRQ) message including its terminal identifier and a transmission address (S213).

The gatekeeper 140 requests an extension number assignment from the keyphone controller 120 using a REQUEST REGISTRATION message including a terminal identifier (S215).

The key phone controller 120 checks whether an assigned extension number exists based on the terminal identifier, allocates an extension number corresponding to the terminal identifier, and assigns an answer to the response including the extension number. The message is transmitted to the gatekeeper 140 through the message (S217).

The gatekeeper 140 stores the extension number to be mapped to the terminal identifier and the transmission address, and through the registration confirmation (RCF: REGISTRATION CONFIRMATION) message including the terminal identifier and the extension number. Notify

As such, since the extension number is assigned to the Internet phone terminal 160 by the key phone controller 120 and registered in the gatekeeper 140, the Internet phone terminal 160 can be accommodated in the key phone system. That is, the Internet phone terminal 160 is handled in the same manner as the key phone terminal 100 so that a call connection can be made with any key phone terminal 100.

Next, a method of controlling call connection between the key phone terminal 100 and the internet phone terminal 160 will be described.

3 illustrates a method of controlling a call connection between a key phone terminal and an internet phone terminal in a key phone system accommodating an internet phone according to a preferred embodiment of the present invention.

As shown in FIG. 3, in order to connect a call from the key phone terminal 100 to the Internet phone terminal 160, the key phone terminal 100 inputs an extension number assigned to the Internet phone terminal 160 to establish a call connection. Request to the keypad controller 120 (S 251).

The key phone controller 120 checks whether the Internet phone terminal 160 is a call connection target using the extension number received from the key phone terminal 100. When the internet phone terminal 160 is a call connection target, the key phone controller 120 transmits a setup message including the extension number to the gatekeeper 140 (S 253).

The gatekeeper 140 searches for a pre-registered transmission address using the extension number received from the key phone controller 120. In this case, the gatekeeper 140 maps and stores a terminal identifier corresponding to the extension number and a transmission address. The gatekeeper 140 finds a transmission address corresponding to the extension number through mapping, and then transmits a setup message including the extension number and the transmission address to the Internet phone terminal 160 (S255).

The Internet phone terminal 160 checks whether the extension number and transmission address is its own, and sends a call connection signal to the gatekeeper 140 through a CONNECT message in response thereto (S 257).

The gatekeeper 140 sends a setup message to the key phone controller 120 and then sends the key phone terminal 100 to the key phone terminal 100 to establish a call connection between the key phone terminal 100 and the internet phone terminal 160 (S). 259, S 261).

On the other hand, in the key phone system that accommodates the Internet phone made as described above, the gatekeeper 140 may be embedded in a module responsible for VoIP of the key phone controller 120. Even in this case, the method of assigning an extension number to the Internet phone terminal 160 or the method of connecting a call from the key phone terminal 100 to the Internet phone terminal 160 may be applied in the same manner as described above.

As described above, according to the key phone system accommodating the Internet phone according to the present invention and a call control method using the same, an extension number is assigned to an Internet phone terminal by interworking a key phone system and an Internet phone system having different call control methods. Therefore, it is expected to contribute to the integration of communication network by accommodating the Internet phone terminal in the key phone system. In addition, by connecting the Internet phone terminal to the PSTN network as well as the Internet network it is possible to use the Internet phone terminal more efficiently. In addition, it will be apparent that it will be a catalyst for accelerating the integration of the communication network by removing the distinction between the existing Internet phone system and the key phone system.

1 is a view showing the configuration of a key phone system accommodating an Internet phone according to a preferred embodiment of the present invention.

2 is a diagram illustrating a method for assigning an extension number to an internet phone terminal in a key phone system accommodating an internet phone according to a preferred embodiment of the present invention.

3 is a diagram illustrating a method for controlling a call connection between a key phone terminal and an internet phone terminal in a key phone system accommodating an internet phone according to a preferred embodiment of the present invention.

<Name of the code for the main part of the drawing>

100: key phone terminal 120: key phone controller

140: Gatekeeper 160 Internet phone terminal

Claims (5)

A key phone terminal for requesting call connection by inputting an extension number assigned to an internet phone terminal; A key phone controller which checks whether the Internet terminal is a target for call connection based on the extension number received from the key phone terminal, and transmits the extension number; A gatekeeper for searching for and transmitting a transmission address corresponding to the extension number received from the keypad controller; And Internet phone terminal for performing a call connection by sending a call connection signal to the key phone terminal in response to the transmission address received from the gatekeeper. Key phone system accommodating an Internet phone comprising a. The keyphone system according to claim 1, wherein the transmission address is stored together with a terminal identifier to be mapped to an extension number assigned to the Internet phone terminal by a registration request of the Internet phone terminal. Allocating an extension number corresponding to the terminal identifier provided according to the registration request of the Internet phone terminal; Storing the allocated extension number to be mapped with the terminal identifier; Requesting a call connection to the internet terminal using the extension number; Requesting a call connection to the Internet phone terminal by searching for a transmission address corresponding to the extension number; And Making a call connection between the key phone terminal and the internet phone terminal in response to a call connection signal to the transmission address; Call control method using a key phone system that accommodates the Internet phone including a. 4. The method of claim 3, wherein the allocation of the extension number is requested through a REQUEST REGISTRATION message including a terminal identifier. 4. The method of claim 3, wherein the allocation response to the request for the extension number assignment is made through a RESPONSE REGISTRATION message including the extension number.