baber/WOPTO huggingface dataset:
Patent KR-20020046603-A (KR)
Title: Electric appliance having a fixing device for electric wire
Inventor: KIM GI JIN
IPC: H01R13/58
Filed: 2000-12-15
Abstract: PURPOSE: An electric product with a wire fixing device is provided to fix a wire introduced into the main body of en electric product easily and stably. CONSTITUTION: An electric product having a wire fixing device(20) includes a fixing part(21) and a wire support part(30). The fixing part is fixed to the main body of the electric product and has a through-hole through which a wire runs. The wire support part is extended with its inner diameter becoming reduced in the admission direction of the wire around the through-hole of the fixing part. The wire support part has a plurality of slits(31) in its length direction. The wire support part becomes thinner as its inner diameter becomes smaller. The inner side of the wire support part that comes into contact with the outer side of the wire has uneven surface. The end of the wire support part has a pressing face. The inner side of the pressing face is in approximately parallel with the outer face of the wire. The pressing face is uneven.
Patent KR-20010035072-A (KR)
Title: for fishing automatic movement snatching equipment
Inventor: KIM DONG HUN
IPC: A01K97/11
Filed: 2000-12-15
Abstract: PURPOSE: An automatic angling device is provided, which promotes the automatic angling by shortening the length of a fishing line and reduces the production cost due to its simple structure. CONSTITUTION: The automatic angling device comprises: outside cylinders(1,10) of which each is divided into two parts vertically and is attached to inside cylinders(20,30); a fixed rod(32) installed at the lower parts of the inside cylinders(20,30); and a projection(38) controlling the elasticity of a compressed coil spring(40) placed between a dome-shaped lower parts(11) of the inside cylinders(20,30) and the outside cylinders(1,10) and being connected to a hole(6) passed through the side of the outside cylinders(1,10).
Patent KR-20020048463-A (KR)
Title: Organic Electroluminescent Compounds Containing Alkene or Diene and Electroluminescent Device Prepared Using the Same
Inventor: PARK GWANG YONG
IPC: C09K11/06
Filed: 2000-12-16
Abstract: PURPOSE: Provided are an organic electroluminescent compound comprising alkene and diene, which is used as a material for forming a luminous layer of an organic electroluminescent element having excellent blue luminous efficiency, improved stability, and long life, and an electroluminescent element using the same. CONSTITUTION: The organic electroluminescent compound is represented by formula 1: R1-CX=CY-R2, or formula 2: R1-CZ1=CX-Ar-CY=CZ2=R2. In the formulas, each of R1 and R2 is selected from the group consisting of phenyl, tolyl, biphenyl, terphenyl, and a group having at least one substituent attached thereto, and each of X, Y, Z1 and Z2 is selected from the group consisting of methyl, ethyl, propyl, butyl, pentyl, hexyl, cyclohexyl, benzyl, phenyl, tolyl, and a group having at least one substituent attached thereto. The substituent is at least one selected from the group consisting of an alkyl group, an alkoxy group, an aryl group, a substituted heterocyclic group, a substituted naphthyl group, a substituted pyridyl group, an aryloxy group, an acyl group, an acyloxy group, an acyl amino group, a cyano group, a carboxyl group, an alkoxycarbonyl group, an aryloxycarbonyl group, an aminocarbonyl group, a carbamoyl group, an aranyl group, a vinyl group, a styryl group, a hydroxyl group, a halogen group, and an amino group.
Patent KR-20020049117-A (KR)
Inventor: HAN SEONG YONG
IPC: H01J29/76
Filed: 2000-12-19
Abstract: PURPOSE: A deflection yoke is provided to reduce errors generated from an assembling process of a convergence yoke by improving a shape of a hook formed in a neck portion of a coil separator. CONSTITUTION: A deflection yoke has a couple of coil separator(10). The coil separator(10) is formed with a screen portion, a rear cover(11b), and a neck portion. A horizontal deflection coil is installed in an inner side of the coil separator(10). A vertical deflection coil is installed in an outer side of the coil separator(10). A ferrite core is installed on an outer surface of the coil separator(10). A plurality of magnet ring and a separate section are fixed on the neck portion by a yoke clamp. A convergence yoke is formed with magnet rings and the separate section. The convergence yoke is fixed by a hook(30) formed on an outer face of the neck portion.
Patent KR-20010085268-A (KR)
Title: Method and apparatus to detect a signal received from a channel signal
Inventor: KABUTZ MARTEN
IPC: G11B20/10
Filed: 2000-12-19
Abstract: PURPOSE: A detecting method of data signals received from channel signals is provided to develop the maximum detector having the minimum hardware complexity. CONSTITUTION: A detecting method of data signals(EBS) from channel signals(HF) is provided. The detecting method comprises steps of making channel receiving signal into digital signals, equalizing the digital signals(Ak), calculating branch distance function value(b_mp,b_pm) from the equalized signals(Bk), deciding the minimum value of the generated branch distance function value, deciding an amalgamation from the minimum value, and generating a bit stream from the continuity of the amalgamation. Thereby, the maximum detection of data played back from an optical disk is performed.
Patent KR-20020049576-A (KR)
Title: Rear bumper of a behicle
Inventor: LEE SEUNG GYO
IPC: B60R19/02
Filed: 2000-12-19
Abstract: PURPOSE: A rear bumper is provided to restrain breakage of a rear bumper facia and to prevent degradation in appearance due to fluttering of the rear bumper facia by forming a fastened portion in the inside of an upper end of the rear bumper facia and fixing a joint band to the fastened portion with a fastener. CONSTITUTION: A rear bumper comprises a rear bumper reinforcement member(12), a rear bumper facia(11), a shock absorbing member(13) and a joint band(30). The rear bumper reinforcement(12) has a rear bumper stay(20) which is fixed to a vehicle body with a fastening member such as a bolt and a nut. The rear bumper facia(11) is fastened to a rear bumper reinforcement member(12) with a fastening member such as a bolt(41) and a nut(42). The rear bumper facia(12) forms the exterior of the bumper. The shock absorbing member(13) is disposed between the rear bumper reinforcement(12) and the rear bumper facia(11) for absorbing a shock from the outside. One end of the joint band(30) is sandwiched and fixed between the rear bumper reinforcement(12) and the rear bumper stay(20) with the fastening member such as a bolt(41) and a nut(42). The joint band(30) fixes an outwardly upper end of the rear bumper facia(11). A fastened portion(11b) is formed in the inside of the rear bumper facia(11). The other end of the joint band(30) is fixed to a fastened portion(11b) with a fastener(44).
Patent KR-20020049879-A (KR)
Title: Mobile Station Possessing Electronic Dictionary Function
Inventor: CHO JEONG UK
IPC: H04B1/38
Filed: 2000-12-20
Abstract: PURPOSE: A mobile communication terminal having an electronic dictionary function is provided to be used as an electronic dictionary by reading contents as to searching characters from an electronic dictionary database and displaying the read contents on an LCD window when selecting an electronic dictionary mode. CONSTITUTION: An electronic dictionary memory(1) stores various words and contents to the words. A switching unit(2) converts the mobile communication terminal from a telephone mode to an electronic dictionary mode for using the mobile communication terminal as an electronic dictionary. A character recognition sensor(3) scans the characters which a user wants to search and recognizes the scanned characters in case that the mobile communication terminal is converted into the electronic dictionary mode by the switching unit(2). A character recognizing unit(4) converts the characters recognized in the character recognition sensor(3) into digital data. An MSM(Mobile Station Modem)(5) outputs the digital data converted in the character recognizing unit(4) to a decoder(6) in case that the mobile communication terminal is converted into the electronic dictionary mode by the switching unit(2), confirms whether a character converted in the decoder(6) exists in the electronic dictionary memory(1), and reads contents to the corresponding character from the electronic dictionary memory(1) and displays the read contents on an LCD window(7) in case that the corresponding character exists. The decoder(6) converts the digital data outputted from the MSM(5) into the character again.
Patent KR-20020050028-A (KR)
Title: Heater control circuit
Inventor: AHN SEONG SUN
IPC: H05B3/00
Filed: 2000-12-20
Abstract: PURPOSE: A circuit for controlling heater is provided to consume an in-rush current in a heater by connecting a ceramic heater with a halogen heater from a power in series in an initial operation. CONSTITUTION: A power supply unit(33) is connected with a halogen heater(36) and a ceramic heater(45). A switching unit connects the halogen heater(36) with the ceramic heater(45) in series in an initial operation, and connects the halogen heater(36) with the ceramic heater(45) in a parallel after an appointed time.
Patent KR-20020056968-A (KR)
Title: Device to count paper money combined with print marking device in paper money producting line
Inventor: LEE JONG SU
IPC: G06M7/06
Filed: 2000-12-30
Abstract: PURPOSE: A master bill paper counter is provided to print marking on the master bill paper and count the paper with high error prevention rate. CONSTITUTION: A guide bar(2), which has cylinders(3,4) on both sides, is installed on the movement conveyer(1). The cylinder loads are moving horizontally and has bodies(7,8), which has an each cylinder moving vertically. One of the bodies has an ink marking device(13) to print barcode and the other has an ink marking device(14) to print numbers. A control box control a vision sensor(15) and ink marking devices. When switch is on, the cylinders(3,4) gather the bodies, cylinders(9,10), the ink marking devices and the vision sensor in center. When the master paper movement conveyer is operated, the paper(M) is moving obliquely, the vision sensor count the paper with the shadow between two pieces of paper and the ink marking devices print barcode on outside and numbers on inside of the paper to keep track of the paper.
Patent KR-20010022038-A (KR)
IPC: H04N5/7826
Filed: 1999-05-20
Abstract: A recording arrangement ( 1 ) for receiving and recording a television signal (F) and for receiving an information signal (I) which contains television program information (FPI), for example, title information about future television programs. The recording arrangement ( 1 ) has a keyword detector ( 54 ) which derives at least one keyword characteristic of the fields of interest of the user from title information of a television program recorded by the recording arrangement ( 1 ). A selector ( 58 ) selects, from the title information of future television programs, which is contained in the television program information (FPI), the title information containing at least one detected keyword. Selected television programs can be displayed on a display device ( 3 ) or can be recorded automatically.
Patent KR-20010031864-A (KR)
IPC: A61K8/96
Filed: 1998-10-05
Abstract: The present invention relates to a carbon dioxide-containing viscous composition comprising an aqueous viscous composition containing one or more thickeners and carbon dioxide, wherein the aqueous viscous composition comprises the carbon dioxide in the form of bubbles, the carbon dioxide-containing viscous composition being characterized in that the thickener is at least one selected from the group consisting of ethyl cellulose, carboxymethyl cellulose and salts thereof, carboxy-methylethyl cellulose and salts thereof, croscarmellose and salts thereof, crystalline cellulose, cellulose acetate, cellulose acetate phthalate, hydroxyethyl cellulose, hydroxypropyl cellulose, hydroxypropylmethyl cellulose, hydroxypropylmethyl cellulose phthalate, powdered cellulose, methyl cellulose and methylhydroxypropyl cellulose; a kit comprising a carbonate or carbonates, an acid or acids, a thickener or thickeners and water in a state where the components produce substantially no carbon dioxide, which enables to produce a carbon dioxide-containing viscous composition comprising carbon dioxide bubbles according to the present invention by mixing the carbonate or carbonates, the acid or acids, the thickener or thickeners and water; a pharmaceutical composition comprising, as an active ingredient, the carbon dioxide-containing viscous composition according to the present invention or the carbon dioxide-containing viscous composition obtainable by the kit according to the present invention; and cosmetics comprising the carbon dioxide-containing viscous composition according to the present invention or the carbon dioxide-containing viscous composition obtainable by the kit according to the present invention.
Patent KR-20010034166-A (KR)
Title: 높은 비선형 단일모드 도파관
IPC: G02B6/028
Filed: 1999-01-07
Abstract: 본 발명은 높은 비선형 굴절률을 갖도록 설계된 코어영역의 굴절률 프로파일을 갖는 단일모드의 광도파관 섬유에 관한 것이다. 상기 높은 비선형 도파관의 코어의 굴절률 프로파일은 낮은 감쇠, 적절히 대체된 제로분산 및 절단파장, 미리 선택된 파장범위에 있어서의 낮으며 양의 값인 총분산도, 및 낮은 분산기울기 등의 유익한 광도파관 특성을 보유하기 위해 상대 굴절률 및 코어 직경의 미리 선택된 값을 갖는 α-프로파일이다.
Patent KR-20010034304-A (KR)
Title: 가변길이 부호화 장치
IPC: H04N19/91
Filed: 1999-01-20
Abstract: MPEG 등의 인코드 장치에 적용되는 가변길이 부호화 장치에서, 양자화 스텝의 정밀도를 유지하면서, 부호화 비트 발생량을 제한한다. 요구되는 화질의 양자화 스텝에서 인코드부(106)에 의해 인코드를 행하여, 비트 스트림(141)을 외부 메모리(101)에 기입한다. 제어부(107)가 외부 메모리(101)로의 기입에서 증가한 라이트 포인터(121)의 증분으로부터 부호화 비트 발생량을 판별하여, 설정값보다 큰 경우에, 그 데이터를 화상의 픽쳐 타입, 시계열상의 위치에 따른 치환처리 패턴에 의해 앞쪽 또는 뒷쪽의 참조화상과 같은 디코드 결과가 얻어지는 데이터로 치환하여, 외부 메모리(101)에 기입함으로써, 상한값 이내의 부호 발생량으로 제어된 출력 비트 스트림(111)으로서 출력한다.
Patent KR-20010041177-A (KR)
Title: 비디오 회의 시스템에서 카메라 변수 사전설정 계산 방법
IPC: H04N5/232
Filed: 1999-12-14
Abstract: 비디오 회의에 참석한 참가자들에 대응하는 적합한 사전설정 카메라 변수를 자동으로 결정하는 비디오 회의 시스템 및 방법. 카메라는 비디오 회의 공간을 줌 아웃 혹은 패닝하고 그들의 얼굴에 기초하여 참가자들을 조사한다. 참가자가 검출될 때, 그 참가자에 대한 사전설정 카메라 변수는 참가자의 중심이 카메라의 뷰 내에 있을 때 계산된다. 각 참가자에 대한 최적의 위치 및 대응하는 카메라 변수는 문화적인 선호도에 근거하여 결정된다. 사전설정의 갱신은 카메라가 회의실을 줌 아웃 혹은 패닝함으로써 주기적으로 행해질 수 있다. 복수의 카메라는 사전설정을 계속적으로 갱신하는데 사용될 수 있다.
Patent KR-20010042705-A (KR)
Title: 디지털 방송 시스템의 위성 신호와 지상 신호를 수신하기위한 이중-모드 수신기
IPC: H04L27/00
Filed: 1998-04-14
Abstract: 본 발명은 QPSK-변조 위성 신호들과 멀티 캐리어 변조(MCM) 지상 신호들을 수신하기 위한 하나의 이중-모드 수신기를 제공하는 것으로, 이러한 이중-모드 수신기는 QPSK 와 MCM 복조 모두를 촉진하기 위해 선택된 최소 필터를 포함하여 구성되는 하나의 결합형 구조를 갖는다.
Patent KR-20010025018-A (KR)
Title: 마이크로 레이징 비드 및 구조와, 관련 방법
IPC: H01S3/06
Filed: 1999-05-13
Abstract: 연장된 구조는 코어(D)와, 복수개의 특성 방출 파장(λ 1 , λ 2 , λ 3 )을 제공하기 위해 상기 코어 주위에 배치된 하나 이상의 이득 매체층과, 그 안에 또는 그 위에 화학 합성물의 합성에 적합한 기능적인 서포트의 성장 매트릭스를 포함한다. 다른 구현예는 각개가 다른 방출 파장을 제공하는 복수개의 광이득 매체 도트를 가진 평탄형 또는 구형이 될 수 있다. 또한, 관심있는 마이크로 레이저 비드를 선택적으로 위치시키고, 광학적으로 부호화된 식별정보를 탐문하기 위해 관심있는 비드에 레이저 소스를 조준하는 기술이 개시된다. 또 개시된 것은, 기능적인 서포트를 포함하고, 전자기 방사를 위한 적어도 하나의 모드의 생성을 서포트하는 구조에 연결된 이득 매체를 추가로 포함하며, 및/또는 증폭된 자발적 방출(ASE)을 산출하고 서포팅하기 위해 하나 이상의 방향에서 크기 또는 길이를 가지는 비드이다.
Patent KR-20010043599-A (KR)
Title: 음향 혼을 위한 비절점 장착 시스템
IPC: B06B3/00
Filed: 1999-05-05
Abstract: 본 발명에 따른 초음파 요소를 위한 비절점 장착 시스템(14)은 구동 링(22)과 가요성 부재(24)를 포함한다. 구동 링은 장착 하우징(16)에 회전 가능하게 연결된다. 가요성 부재는 반경 방향으로 내측 부위에서 초음파 요소에 고정되며, 반경 방향으로 외측 부위에서 구동 링에 고정된다. 가요성 부재는 구동 링에 전달되는 힘을 감소시키기 위한 가요성 핑거(30)를 포함할 수 있다. 
     또한, 가요성 부재는 반경 방향으로 내측 부위에 내측 환형 링(26)을 포함하고, 반경 방향으로 외측 부위에 동심의 환형 링을 포함할 수 있다. 이들 링은 핑거에 의해 연결된다.
Patent KR-20010043687-A (KR)
Title: 열가소성 수지 연신필름
IPC: B29C55/02
Filed: 1999-05-19
Abstract: 본 출원은 열가소성 수지 40∼85중량% 및 무기 또는 유기 미세분말 60∼15중량%를 함유하는 연신필름 기재층(A)의 적어도 한쪽 면 위에 열가소성 수지 30∼90중량% 및 상기 연신필름 기재층(A)의 무기 또는 유기 미세분말 보다도 평균입자경이 작은 무기 또는 유기 미세분말 70∼10중량%를 함유하는 연신필름 표면층(B)을 가지고 있고, 또한 공극율이 5∼60%인 것을 특징으로 하는 열가소성 수지 연신필름에 관한 것이다. 본 출원의 열가소성 수지 연신필름은, 표면강도가 높고, 엠보스가공성이 우수하며, 또한 잉크밀착성도 양호하기 때문에, 건축장식재를 비롯한 여러 가지의 용도로 효과적으로 사용할 수 있다.
Patent KR-20010078323-A (KR)
Title: Method and apparatus for exposure, and method of manufacturing device
Inventor: OKUNO HIROKI
IPC: G03F7/22
Filed: 2001-02-03
Abstract: PURPOSE: An exposure method and an aligner and a method of manufacturing device are provided to increase throughput, while keeping sufficient exposure accuracy. CONSTITUTION: When a plurality of exposures are performed repeatedly on one and the same substrate(W), control factors for an aligner(102), which are related with throughput are changed by a control system(20) according to an exposure accuracy required for each exposure. For example, when a very high exposure accuracy is required, the control factors are changed into such states that resolution is more heavily weighted than the throughput, and when the required exposure accuracy is not so high, the control factors are changed into states such that throughput is more heavily weighted than the resolution. When compared with the case where the aligner(102) is always controlled based on the same control factors, it is clear that throughput can be increased by this method. The control factors are changed into states such that the throughput is more heavily weighted, only when the required exposure accuracy is not high, so that the exposure accuracy can be kept at a sufficiently high value.
Patent KR-20010044313-A (KR)
Inventor: KIM YOUNG KYU
IPC: C02F9/14
Filed: 2001-02-05
Abstract: PURPOSE: Disclosed is a photocatalytic system using sunlight or ultraviolet rays(UV) for disinfecting wastewater and removing non-biodegradable organics from wastewater. The photocatalytic system is adopted at a biological process for replacing conventional chlorine disinfection having several defects. Final treated water is used as tap water for miscellaneous purpose. CONSTITUTION: The photocatalytic system is installed in a final settling basin. When sunlight or UV is irradiated at wastewater, oxygen and OH- radicals are generated. Thereby, wastewater is disinfected, and non-biological organics are removed by oxidation ability of the radicals. The system is cylinder-shaped and transparent for irradiation of sunlight. And photocatalyst made of titanium is packaged in the system.
Patent KR-20010082097-A (KR)
Title: A method of fabricating a zinc oxide based resonator
Inventor: KOWACH GLEN ROBERT
IPC: H01L41/319
Filed: 2001-02-09
Abstract: PURPOSE: A method of fabricating a zinc oxide based resonator is provided to form the zinc oxide with the highest possible crystallinity, the highest possible orientation, thus yielding the highest value for electromechanical coupling coefficient, K2, as well as the lowest possible loss for its utilization as a controllable vibrating element. CONSTITUTION: The resonator comprises a resonator substrate base. It should be apparent to one of ordinary skill in the art that resonator substrate base may also comprise an air gap acoustic cavity . Substrate base comprises a substrate layer. Substrate layer comprises silicon(Si). In the alternative, however, substrate layer may also comprise diamond, quartz, silicon carbide(SiC), sapphire(Al2O3), gallium arsenide(GaAs), as well as other materials apparent.
Patent KR-20020066159-A (KR)
Title: Capacitor module for oil Capacitor
Inventor: CHOI BYEONG NO
IPC: H01G2/10
Filed: 2001-03-05
Abstract: PURPOSE: A condenser module for an oil condenser is provided to use the oil condenser in a high frequency range and supply large current efficiently. CONSTITUTION: A condenser module for an oil condenser comprises many condensing elements(1), a first and a second conductive plates(2,2'), a first and a second port plates(3,3'). The condensing elements(1) are elliptic columns and the first and the second conductive plates(2,2') are of L type. The condensing elements(1) are attached to the first and the second conductive plates(2,2') by soldering(7). The first and the second port plates(3,3') are coupled to the first and the second conductive plates(2,2'), respectively. The first port plate(3) is coupled to an electrode port(8) and a wire(9). The second port plate(3') has a hole(10) for coupling a conducting bolt. The first and the second conductive plates(2,2') have many holes.
Patent KR-20020071254-A (KR)
Title: Potted plant using phllostachys nigra MUNRO and method for preparing the same
Inventor: CHOI SEON SEONG
IPC: A01G1/00
Filed: 2001-03-05
Abstract: PURPOSE: A method for producing a potted plant of dwarf Phyllostachys nigra is provided by artificially controlling the growth of Phyllostachys nigra to change an average height thereof from 5 to 10m to 20 to 15cm and then growing in a pot. Therefore, the potted plant has a dwarf habit in a pot for a long period of time. CONSTITUTION: About 2 to 3 layers are peeled off daily from the bark of Phyllostachys according to the growth degree thereof, the stem is treated with a curing agent to prevent the growth-controlled stem of Phyllostachys nigra from being fallen and then short leaves and side branches are shortened by treating the Phyllostachys nigra with a growth control agent. Thereafter, a part of Phyllostachys nigra leaves is removed and then transplanted into a pot. The curing agent is a mixture of Fe and Mg in a weight ratio of 1:1 and is diluted 1,000 times with water.
Patent KR-20020071297-A (KR)
Title: Apparatus and method for examining bus matched of system
Inventor: OH TAE HWAN
IPC: G06F13/00
Filed: 2001-03-06
Abstract: PURPOSE: A bus matching checking system and method is provided to make it possible to check a bus matching in a system without constructing a test board or a test system or while the bus is operated so that it can enhance a system reliability. CONSTITUTION: The system comprises a controller(101), and a bus interface controller(103). The controller(101) controls an overall operation for reading or writing data. The bus interface controller(103) controls a bus line as requested by the controller(101). The bus interface controller(103) receives a chip selection signal, an address and data via a chip selection line(CS), an address line(ADDRESS), and a data line(DATA), and makes a response to the received signal via a response line(ACK). The bus interface controller(103) controls the bus line connected to other block which the controller wants to read data from or write data to. The bus interface controller(103) is connected to the block via a clock out line(Clock_out), a frame synchronization output line(FS_out), a data output line(Data_out), a clock input line(Clock_in), a frame synchronization input line(FS_in), and a data input line(Data_in). The bus interface controller(103) includes a data transmitter and a data receiver controlled by the controller(101). The controller(101) outputs a mode 1 signal for controlling the data transmitter and the data receiver of the bus interface controller(103), and a mode 2 signal for checking if the bus line is properly matched. The mode 1 signal is for setting a data writing mode or a data reading mode, and the mode 2 signal being for looping back a bus line check signal transmitted when checking the bus line.
Patent KR-20020071414-A (KR)
Title: Real time calling method of internet phone under ultra internet network
Inventor: SONG YONG HO
IPC: H04L29/12
Filed: 2001-03-06
Abstract: PURPOSE: A method for maintaining the real-time connection of an Internet phone using a very high speed Internet network is provided to perform a telephone conversation through the Internet phone by recognizing a compulsory recovery of an IP(Internet Protocol) and receiving the reassignment of the IP when an ISP(Internet Service Provider) performs the compulsory recovery. CONSTITUTION: An Internet phone subscriber receives an IP from an ISP, and an Internet phone number and an IP address are assigned to a gatekeeper(P10). A periodical keep alive signal is generated(Q10). It is confirmed whether the IP compulsory recovery of the ISP is performed(R10). If the IP compulsory recovery of the ISP is performed, a DHCP(Dynamic Host Configuration Protocol) is performed to receive a floating IP and the keep alive signal is generate(S10).