KR20010094490A - Ip phone system and network access method thereof - Google Patents

Abstract

PURPOSE: An Internet phone system and a call access method are provided so that a user connected to a generic PSTN and a user connected to the Internet can carry out their telephone conversation easily and conveniently. CONSTITUTION: An Internet phone system for the telephone conversation between a terminal connected to the Internet(100) and a telephone subscriber connected to a generic PSTN(200) comprises an Internet phone gateway(110), a gatekeeper(120), and a router(130). The gateway(110) to interface the PSTN(200) has a carrier-class switching function and supports an SS7(Signalling System No.7) protocol. Also the gateway(110) supports compact PCI hardware and an SNMP protocol management/remote management tool. The gatekeeper(120) is connected with a plurality of Internet phones(150) or PCs(160) through a LAN(Local Area Network)(140). The gatekeeper(120) executes a function to convert voice data into H.323 digital packet data.

Description

IP PHONE SYSTEM AND NETWORK ACCESS METHOD THEREOF}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication system, and more particularly, to an Internet phone system and a call connection method for providing a telephone call service between clients connected to an Internet network or subscribers of a public public telephone network.

Recently, a technology for performing a phone call between a PC and a PC using an internet network has been introduced. In order to make a phone call using Internet Phone technology in a home, an IP address is obtained by connecting to an Internet Service Provider (ISP) using a Point-to-Point Protocol (PPP), a modem and software for Internet access. By assigning the (IP Address) and preparing to run TCP / IP, it is possible to connect to the other host for the voice call.

Subsequently, the PC user attempts to connect to the called party by running the Internet phone program, and when the other party answers, the voice trunk is opened to make a phone call. However, since the conventional phone-to-PC Internet phone technology is used to make a call between computers that prepare devices such as Internet phone programs, microphones, and speakers for Internet calls, both callers are simultaneously connected to the Internet. It is difficult to talk to the unspecified majority.

Moreover, in the case of not having a computer, or in the case of a person unfamiliar with the usage thereof, the telephone call technology through the Internet has been difficult to apply. On the other hand, the Internet phone technology between the phone and the phone adopts a method of connecting subscribers who want to make a phone call to a public notary telephone network (PSTN) to the Internet phone gateway, and then each Internet phone gateway is connected to each other through the Internet network. have.

However, the above-described prior art has a disadvantage in that the user has to enter the telephone number of the called party again after being connected to the Internet gateway through the general public telephone network, and uses a separate public telephone network and the network of the gateway operator. There is a disadvantage to bear.

Accordingly, it is a first object of the present invention to provide an internet phone system and method capable of easily conducting a telephone call between a user connected to a general public network and a user connected to an internet network.

It is a second object of the present invention to provide an Internet phone system and a method in which, in addition to the first object, users connected to each other by a local area network (LAN) in a specific area can make telephone calls with each other.

It is a third object of the present invention to provide an Internet phone system and method in which, in addition to the first object, users connected to each other by LAN in a specific area can make telephone calls with LAN users in another area.

It is a fourth object of the present invention to provide an internet phone system and a method in which a user connected to an internet network can talk with a mobile communication network user in addition to the first object.

1 is a diagram showing the configuration of an Internet phone system according to the present invention.

2 is a diagram showing the configuration of an Internet phone system according to the present invention on an H.323 network.

3 is a diagram showing the system configuration of an Internet telephone according to the present invention.

4 is a diagram showing a first embodiment of a call connection method of an internet phone system according to the present invention;

Fig. 5 shows a second embodiment of a call connection method of an internet phone system according to the present invention;

Fig. 6 shows a third embodiment of a call connection method of an internet phone system according to the present invention.

<Description of the symbols for the main parts of the drawings>

100: Internet network

110: IP phone gateway (Gateway)

120: Gatekeeper

130: router

140: LAN

150: IP Phone

200: public public telephone network (PSTN)

300: speech processing codec module

310: RISC Flash ROM

320: Digital Signal Processing (DSP) Module

330: keypad I / O

340 RTOS Debugger

350: handset terminal

360: speaker terminal

370: microphone terminal

380: LCD I / O

390: LAN I / O

400: PC terminal

410: 10/100 Base T

420: 10/100 Base T

In order to achieve the above object, the present invention provides a system for providing a telephony service between client terminals connected to the Internet or a public public telephone network (PSTN), the alias address of the client terminal connected to the Internet; A gatekeeper for translating the IP address and authenticating whether the call request is granted; A gateway for converting digital packet data transmitted from a client terminal connected to the Internet into voice data; A voice processing codec module for transmitting and receiving an input voice signal to the Internet, a ROM storing an operating program for controlling an internet telephone call, and an application program for making an internet telephone call according to the operating program. An internet phone system including an internet phone including a signal processing module for processing an API) and a communication module having a LAN card for external communication.

Hereinafter, an Internet phone system and a call connection method according to the present invention will be described in detail with reference to FIGS. 1 to 6.

1 is a diagram showing the configuration of an Internet phone system according to the present invention. Referring to FIG. 1, an Internet phone gateway 110 and a gatekeeper are used to make a telephone call between a terminal connected to the Internet network 100 and a general telephone subscriber connected to the public public telephone network 200. (gatekeeper 120), router 130 is shown.

In addition, a plurality of Internet telephones 150 or PC terminals 160 are connected to the gatekeeper 120 via a local area network (LAN) 140. The Internet phone gateway 110 according to the present invention performs a function of converting voice data into H.323 digital packet data, which is an Internet protocol, for a voice call between the Internet phone 150 and a general telephone subscriber.

That is, the gateway 110 according to the present invention may be provided with a carrier level switching function as a system for interfacing a general public telephone network (PSTN) 200 and may have intelligent call management and switching functions. The gateway 110 according to the present invention may support the SS7 protocol and may support liquidity through an open structure.

The gateway 110 according to the present invention may support compact PCI hardware and support SNMP protocol management and remote management tools. In addition, the gateway 110 according to the present invention supports SS7 / E1 trunks, and may include call control and DTMF collection, DTMF tone generation and detection functions. In addition, the gateway 110 according to the present invention may support multiple voice modulators (VOCODECs), that is, G.711 PCM and ETSI GSM and G.723.1.

The gatekeeper 120 according to the present invention has a function of controlling an H.323 network, and the gatekeeper 120 functions only for a terminal, a main control unit (MCU), and a gateway registered to the gatekeeper 120. to provide. The gatekeeper according to the present invention performs an authentication operation to determine whether to permit the incoming call from the outside, and performs a control for the bandwidth change request.

In addition, the gatekeeper 120 according to the present invention performs the conversion between the alias address (alias address) and IP address (IP address) of the Internet phone 150 or PC terminal 160. At this time, the conversion operation is performed in accordance with the conversion table updated using the registration message.

2 is a diagram showing the configuration of an Internet phone system according to the present invention on an H.323 network. Referring to FIG. 2, the gateway 110 and the gatekeeper 120 are connected through the LAN 140, and the terminal 210 may be an internet phone or a PC according to the present invention. The gatekeeper 120 according to the present invention is logically separated from each terminal 210, but may be physically installed in the terminal 210, the MCU 230, the gateway 110, or the H.323 LAN device. Can be.

For example, the gatekeeper 120 converts an IP address 203.255.194.12 corresponding to an alias address 275-0025 using an internet phone.

3 is a diagram illustrating a system configuration of an IP phone according to the present invention. Referring to FIG. 3, there is shown a ROM 310 storing a voice processing codec module 300 for transmitting and receiving an input voice signal to the Internet, and an operation program for controlling an internet telephone call.

In addition, a signal processing module 320 and a memory device 330 and 340 for processing an application program interface (API) for an internet phone call according to an operating program stored in a ROM 310 are shown. . The ROM 310 device according to the present invention may employ a flash memory, and may include an RISC SDRAM 330. The signal processing module 320 according to the present invention may use a digital signal processor (DSP) chip and is connected to the keypad I / O 330 and the RTOS debugger 340.

The voice processing codec module 300 according to the present invention may be composed of an AD / DA converter, a PCM codec, a voice codec, and a packet processor block. The AD / DA converter converts a voice signal input from the handset 350 or the microphone 370 of the telephone to a digital signal at the time of transmission, and converts the digital signal into an analog voice signal at the time of reception.

The PCM codec according to the present invention performs pulse code modulation (PCM) on the transmitted signal and performs PCM demodulation on the received signal. In addition, the voice codec performs a function of compressing the transmitted data and restoring the received data. The packet processor according to the present invention configures data to be transmitted as packet data that can be transmitted through an Internet protocol, and restores the received packet data to a state before packet processing.

Internet phone according to the present invention has a LAN interface 410, 420 of 10 base T or 100 base T, is connected to each other via a LAN terminal 390, and is connected to a PC through a PC connection terminal 400 It can be used or it can be used as stand alone type.

Fig. 4 is a diagram showing the first embodiment of the call connection method of the Internet phone system according to the present invention. The first embodiment of the call connection method according to the present invention shows a case where a sender of an Internet telephone connected to a LAN in the same area makes a call by calling a receiver connected to a LAN in the same area.

Referring to Fig. 4, a user of the first Internet phone 141 connected to the LAN 140 in the first area makes a call with a second Internet phone 142 of the called party connected to the LAN 140 in the same first area. If you want to, enter the alias address (for example, phone number or extension number) of the second Internet phone on the keypad of the first Internet phone 141 (step S400), the gatekeeper 120 of the first region ) Converts the alias address of the second Internet phone 142 into an IP address to set up a call channel (step S401). As a result, the first Internet telephone 141 and the second Internet telephone 142 make a voice telephone call with each other (step S402).

Fig. 5 is a diagram showing a second embodiment of the call connection method of the Internet phone system according to the present invention. A second embodiment according to the present invention discloses a method in which a telephone call is made by an internet telephone user of a second region connected to an IP network by an internet telephone user of a first region.

Referring to Fig. 5, a second Internet telephone 531 connected to a LAN 520 in a region B, where a user of the first Internet telephone 501 connected to a LAN 500 in region A, is connected through the Internet 510. When a user wants to make an internet phone call with the user, the call signal output from the Internet phone 501 of the LAN A 500 is transmitted through the gatekeeper 540 and the routers 550 and 560 connected to the LAN A 500. Sent to gatekeeper 570 on B 520.

Subsequently, the call signal is transmitted to the Internet phone 531 by the gatekeeper 570 connected to the LAN B 520, whereby a call channel is established, and a call is established between the Internet phones located on different LANs through this channel. Can be done.

Fig. 6 is a diagram showing a third embodiment of the call connection method of the Internet phone system according to the present invention. A third embodiment of the present invention discloses a telephone call method between an Internet phone user and a subscriber of a public public telephone network. Referring to FIG. 6, a call signal output from an Internet phone 602 connected to a local A LAN 601 connected to an Internet network is a gatekeeper 603 connected to the LAN 601 and a PSTN connected to the gateway 604. Transmitted to the network 610.

Subsequently, the call signal is transmitted to the general telephone 620 through the PSTN network 610 switch or the like, and the call channel is established, and the Internet telephone 602 and the general telephone 620 connected to the IP network and the PSTN network through this channel. The call is made between.

The foregoing has outlined rather broadly the features and technical advantages of the present invention to better understand the claims of the invention which will be described later. Additional features and advantages that make up the claims of the present invention will be described below. It should be appreciated by those skilled in the art that the conception and specific embodiments of the invention disclosed may be readily used as a basis for designing or modifying other structures for carrying out similar purposes to the invention.

In addition, the inventive concepts and embodiments disclosed herein may be used by those skilled in the art as a basis for modifying or designing other structures for carrying out the same purposes of the present invention. In addition, such modifications or altered equivalent structures by those skilled in the art may be variously changed, substituted, and changed without departing from the spirit or scope of the invention described in the claims.

As described above, the present invention collects scattered resources into a single virtual call center to configure a system capable of comprehensive management, and provides a conventional PBX function and an automatic call splitter (ACD) at a low cost. ; automatic call distribution) function.

Moreover, the Internet phone technology according to the present invention can enable a teleworker to work from home and provide a new service using web technology. When the Internet phone technology according to the present invention is applied to a home, a service may be provided in the form of providing a service in the form of an ISP providing a network connection and a telephone connection service by using a software terminal, a hardware terminal, or a modem terminal. .

When the Internet phone technology according to the present invention is applied to a home office, an ADSL or a cable modem provides an Ethernet interface, and it is not only possible to configure several telephones, but also to form an Internet telephone and a modem. The terminal can be provided.

When the Internet phone technology according to the present invention is applied to a small office, the terminal may be configured with a telephony interface card or an ethernet telephone, and the telephony server may be connected to a PBX. The same function can be performed.

When the Internet phone technology according to the present invention is applied to an enterprise, the IP-based PBX includes an existing PBX role by integrating IP telephony and a telephone system, while providing IP-based telephone service. Can be provided.

Claims (11)

A system for providing telephony services between client terminals connected to the Internet or a public switched telephone network (PSTN), A gatekeeper for converting an alias address and an IP address of a client terminal connected to the Internet, and authenticating whether a call request is granted; A gateway for converting digital packet data transmitted from a client terminal connected to the Internet into voice data; A voice processing codec module for transmitting and receiving an input voice signal to the Internet, a ROM storing an operating program for controlling an internet telephone call, and an application program for making an internet telephone call according to the operating program. Internet telephone including a signal processing module for processing an API) and a communication module having a LAN card for external communication Internet phone system including. The Internet phone system according to claim 1, wherein the gatekeeper further comprises a table for converting an alias address and an IP address of a client terminal in an H.323 network. The Internet phone system according to claim 1, wherein the gatekeeper is installed in a client terminal, a gateway, a main control unit (MCU), or an H.323 LAN device connected to the Internet network. The Internet phone system of claim 1, wherein the gatekeeper further includes a control function for a bandwidth change request. The Internet phone system according to claim 1, wherein said Internet telephone further comprises a communication interface for connecting to a PC. The Internet phone system according to claim 1, wherein the client terminal connected to the Internet network comprises the Internet telephone or a PC terminal. The Internet phone system according to claim 1, wherein the voice processing codec module of the Internet telephone is connected to the signal processing module and is connected to a handset terminal and a speaker and a microphone terminal. A plurality of Internet telephones are connected to each other through a LAN, and are connected to the Internet and a gateway through a gatekeeper that converts alias addresses and IP addresses of the plurality of Internet telephones, and is connected through an external Internet access terminal or a public public telephone network. In how to make a phone call with a user, A user of a first Internet telephone in a first region, in which the plurality of Internet telephones are connected to each other by a LAN, inputs an alias address of a second Internet telephone, which is a receiver of a first region, to which a telephone call is to be made; Sending to a keeper; And The gatekeeper of the first region converting the alias address of the second Internet phone into an IP address to establish a call channel between the first and second Internet phones; Internet phone call connection method comprising a. A plurality of Internet telephones are connected to each other by a LAN, connected to the Internet and a gateway through a gatekeeper that converts alias addresses and IP addresses of the plurality of Internet telephones, and connected through an external Internet access terminal or a public public telephone network. In how to make a phone call with a user, In order to make a telephone call with a user of a second Internet telephone in a second region in which a plurality of Internet telephones are connected to each other by LAN, a user of a second Internet telephone in a second region in which a plurality of Internet telephones are connected to each other by LAN. Inputting an alias address and transmitting the alias address to a gatekeeper of a first region; The gatekeeper of the first region sends, via a router, the alias address of the second Internet telephone to the gatekeeper of the second region; And The gatekeeper of the second region converting the alias address of the second internet phone connected to the LAN to establish an communication channel between the first and second internet phones; Internet call connection method comprising a. A plurality of Internet telephones are connected to each other by a LAN, connected to the Internet and a gateway through a gatekeeper that converts alias addresses and IP addresses of the plurality of Internet telephones, and connected through an external Internet access terminal or a public public telephone network. In how to make a phone call with a user, Inputting the telephone number to a gatekeeper so that an Internet telephone user connected through the router and a gatekeeper to the Internet network can make a telephone call with a user connected to the public public telephone network; The gatekeeper transmits a call request signal to a gateway for converting and transmitting digital packet data into a voice signal; And The gateway calling the general public telephone network subscriber phone to establish a call channel Internet phone call connection method comprising a. 11. The method of claim 8, 9 or 10, wherein said Internet telephone comprises a PC having an Internet phone program.