KR20030062766A - The internet phone gateway apparatus connected to Private Branch Exchange(PBX) or Key-Phone system for internet phone service - Google Patents

Abstract

The present invention relates to an analog gateway device that provides a means for utilizing Internet telephony services through a regular telephone connected to an on-premises switching device such as a private exchange or a key phone. In the field of Internet telephony services, IP phones or web phones based on personal computers have been used as service terminals.However, companies equipped with an on-premises exchange system have introduced corporate analog gateway devices so that users can receive Internet telephony services through regular telephones. Doing. Existing analog gateways require 16-bit or higher processor and external memory based on real-time operating system to handle internet telephony protocols and directly access the Internet. Therefore, users can use internet telephony services through gateways. It is acting as a barrier to prevent it. In order to solve this problem, the present invention allows the personal computer to perform the function of processing the Internet telephony protocol and the Internet access function in a personal computer. It is configured to connect through and USB interface. By applying the present invention, the hardware configuration of the gateway can be simplified to drastically reduce the gateway device price, and can be continuously improved by upgrading the gateway software installed in the personal computer, and the voice compression codec having the greatest impact on sound quality. Including the wealth in the gateway has the advantage of ensuring stable internet call quality.

[Index]

-Analog gateway: Internet phone terminal that enables Internet phone service through a general phone connected to the extension of the branch exchange device.

-Subscriber line interface: Analog telephone line interface of a gateway that connects a station / territory line of a regular telephone, premises exchange system, or a switchboard trunk line

-FXS card: corresponds to the subscriber tip ring (TIP-RING) card line of the telephone exchange and performs functions such as supplying power to the phone and determining loop current.

-FXO card: performs the same function as the phone

-Private exchange / keyphone: A telephone exchange system that internal members share a trunk line connected to a telephone company in an enterprise, and automatically connects a telephone connected to an extension of the corporate internal exchange system.

-CO line card: Access card of the local exchange device connected to the subscriber line of the telephone company

-Extension card: access card of the exchange unit to which the telephone is connected

-USB Interface: Provides high speed serial data communication between personal computer and peripheral devices. It supports low speed 2Mbps and high speed 12Mbps.

-PCM (PCM) interface: A system that converts analog voice into digital PCM data at the subscriber line interface and delivers it to the voice compression codec unit and time slot unit.

-Internet phone service device: Gatekeeper, gateway, billing device, authentication device, etc. operated by internet phone service provider for internet phone service

Description

The Internet phone gateway apparatus connected to Private Branch Exchange (PBX) or Key-Phone system for internet phone service}

The present invention relates to an analog gateway device that provides an Internet telephone connection means through a general telephone connected to an on-premises exchange device such as a private exchange or a key phone, and utilizes a personal computer as an internet connection means and an internet phone protocol processing means of a gateway. The present invention relates to a gateway device having features that simplify device configuration, reduce device configuration costs, and improve desired functions and performance by upgrading gateway software installed in a personal computer.

The gateway used in the conventional Internet telephony service has a function of directly accessing the Internet, and provides a means of using the Internet telephony service through a general telephone connected to the extension of the premises exchange apparatus. Therefore, in addition to subscriber line interface function and voice compression codec function, it has built-in external memory unit and real-time operating system based 16-bit or higher processor to provide the function to process the Internet telephony protocol and access the Internet directly.

Existing analog gateways require 16-bit or higher processor and external memory based on real-time operating system to process Internet telephony protocols and access the Internet directly. Since the program stored in the internal memory needs to be changed, the work of the expert is required. The present invention can greatly reduce the equipment price by simplifying the hardware configuration of the gateway by performing the function of processing the Internet telephony protocol and the Internet access function in a personal computer, and when the function and performance of the device are required, the gateway software upgraded from the Internet You can download the file to make changes easier. In addition, the subscriber line interface function and voice compression codec function, which has the greatest impact on sound quality, can be performed at the gateway to ensure stable internet call quality, and the USB interface is used to connect the gateway with a personal computer that performs the Internet telephony protocol function. Use This ensures sufficient bandwidth for Internet telephony services between the personal computer and the gateway.

-. 1 is a network configuration for using the Internet phone service through a general telephone connected to the premises exchange device

-. 2 is a block diagram of a conventional enterprise Internet telephone gateway

-. 3 is a block diagram of an Internet telephony gateway according to the present invention.

-. 4 is a block diagram of a gateway for processing a voice compression codec function in software in a personal computer according to the present invention.

In order to achieve the above object, the configuration of the Internet telephone gateway device connected to the premises exchange apparatus will be described in detail.

1 is a network diagram for using an Internet telephone service through a general telephone connected to an extension of a premises exchange system. When the telephone receiver of the outgoing telephone 11 connected to the extension card of the telephone exchange device 12 is lifted, the telephone exchange device generates a dial tone in the telephone. When the user presses a preset access number (e.g., 8) to open the FXS line of the gateway 13 connected to the trunk line of the local exchange system, the FXS card of the gateway becomes secondary. Generates a dial tone. At this time, when the user presses a general telephone number or a mobile telephone number, a call is made with a called party connected to the general telephone network 15 through the Internet telephone service device 14 performing a matching function between the Internet and the general telephone network. The Internet telephone service apparatus is operated by an internet telephone service provider. On the other hand, if you know the called party's gateway 16 to which you want to make a call, press the Internet phone number assigned to the FXO card of the gateway, and the dial tone generated from the extension card of the called party's internal exchange device 17 is dialed. Is delivered to the user. At this time, if you press the premises phone number of the called terminal 18, the incoming ring rings to the phone and the incoming call is made.

2 is a block diagram of a conventional enterprise Internet telephone gateway. Conventional gateways include a subscriber line interface unit 21 connected to a general telephone line, a trunk line / extension of a branch office switching device, or a trunk line of a telephone station switchboard; A voice compression codec unit 23 for compressing the PCM data output of the subscriber line interface unit; A system control unit 24 which is a 16-bit or higher processor based on a real-time operating system for processing an Internet telephony protocol and controlling a gateway; It consists of an external memory section 25 storing an application program executed in the system control section, a kernel and a voice compression program executed in the voice compression codec section, and an internet connection section 22 providing a means for the analog gateway to directly access the Internet. .

3 is a block diagram of an Internet telephone gateway according to the present invention. The subscriber line interface unit 31 and the voice compression codec unit 32 perform a general telephone connection function and a function of converting PCM voice data into compressed digital data. Since the personal computer 35 processes the Internet telephony protocol, the function of the access control unit 33 that performs the system control function can be simplified as follows.

1) The output of the voice compression codec unit is transmitted to the personal computer through the USB interface.

2) Delivers the compressed voice data received from the personal computer through the USB interface to the voice compression codec unit.

3) When a plurality of voice compression codec units are applied, the data routing function is performed to the voice compression codec unit by referring to headers of the transmission / reception data.

4) Transfer hooks, DTMF control signals, etc. to the personal computer

5) Control subscriber line interface

The personal computer 35 provides a means of processing the Internet telephony protocol and transmitting compressed voice data transmitted and received from the gateway to the real-time transmission protocol through the Internet, and downloading the corresponding software from the Internet when the function and performance of the gateway are required to be improved. I can change it. The memory unit 34 is applied when the connection control unit needs to store a program other than a simple function as described above.

4 is a configuration diagram of a gateway for processing the voice compression codec function of FIG. 3 by software in the personal computer 43. As shown in FIG. In order to further simplify the configuration of the gateway, the function of compressing PC digital data is performed on a personal computer. Since the personal computer 43 processes the Internet telephony protocol as shown in FIG. 3, the access controller 42 performs the following functions.

1) Transfer the PC output of the subscriber line interface unit to the personal computer through the USB interface.

2) PCM data received from the personal computer through the USB interface to the subscriber line interface unit

3) When a plurality of subscriber line interface units are applied, the data routing function is performed to the corresponding subscriber line interface unit by referring to the header of the transmission / reception data.

4) Transfer hooks, DTMF control signals, etc. to the personal computer

5) Control subscriber line interface

The Internet phone gateway according to the present invention simplifies the system control function of FIG. 2 to the connection control part of FIG. The conventional gateway should configure a system control unit that applies an operating system and a 16-bit processor or more to perform the Internet telephony protocol processing function and the Internet access function alone. The system controller of FIG. 2 may be replaced by a connection controller that provides a USB interface between the voice compression codec unit and the personal computer and controls the subscriber line interface unit. In addition, if the function and performance of the gateway are required, each user can download and change the gateway software from the Internet to his or her personal computer, so system maintenance is easy.

Claims (2)

In the configuration of the Internet telephony gateway of FIG. 2, the personal computer 35 of FIG. 3 processes the Internet telephony protocol processing function performed by the system control unit 24 and the Internet access function provided by the Internet connection unit 22; Internet telephone gateway device, characterized in that the connection control unit 33 provides the USB interface between the voice compression codec unit 32 and the personal computer 35, and performs the control function of the subscriber line interface unit 31 3. The subscriber line interface unit 42 converts analog voice into PCM digital data by processing the voice compression codec unit 32 of FIG. 3 by software in the personal computer 41 of FIG. Convert digital data into analog voice; The Internet telephone gateway device characterized in that the connection controller 43 provides a USB interface function between the subscriber line interface unit 42 and the personal computer 41 and performs a control function for the subscriber line interface unit 42.