baber/WOPTO huggingface dataset:
Patent KR-20030028763-A (KR)
IPC: B01D29/15
Filed: 2001-06-27
Abstract: 본 발명의 목적은 기본몸체(3)와 필터부재(4)에 의해 덮인 적어도 하나의 유체통과개구부(2)로 구성된 유체파이프용의, 특히 충전주입구에 사용되는, 단순하며 내부하성의 필터를 제공하는 것이다.  본 발명에 따라, 필터부재(4)는 권선끝단 (5c)이 바람직하게는 필터의 받침(1b)상의 고리링(3b)에 상에 지지된 단단하게 감겨진 스프링와이어(5)로 구성된다.
Patent KR-20040065458-A (KR)
Inventor: YOON IN HO
IPC: H04L12/66
Filed: 2003-01-14
Abstract: PURPOSE: A method for communicating voice data of a Mira detachable monitor is provided to define a new protocol between a Mira monitor and a host PC, and to define a protocol scenario as defining a protocol message between the Mira monitor and the host PC, thereby improving a communication speed. CONSTITUTION: The second user(user2(PC)) receives a call connection for voice communication from the first user(user1), requests a setup of the second user(user2(MIRA)), and receives an alarm signal from the second user(user2(MIRA)). The second user(user2(PC)) receives a call connection complete signal from the second user(user2(MIRA)), performs a voice call connection between the first user(user1) and the second user(user2(PC)) and between the second user(user2(PC)) and the second user(user2(MIRA)), and starts voice communication. When the voice communication is terminated, the second user(user2(PC)) transmits a call connection complete signal to the second user(user2(MIRA)).
Patent KR-20040065105-A (KR)
Inventor: LEE YU SEOP
IPC: B41J2/14
Filed: 2003-01-15
Abstract: PURPOSE: A method for discharging a fluid using ion wind and an ink jet print head thereof are provided to improve discharge frequency by removing time needed for recharging a fluid and to compact the structure of an ink jet print head by reducing the size of electrodes for generating ion wind. CONSTITUTION: A method for discharging a fluid using ion wind comprises the steps of filling a fluid in a nozzle(222) by using the capillary force, generating ion wind by ionizing the air around the outlet of the nozzle, and discharging the fluid in the nozzle by reducing the atmospheric pressure around the outlet of the nozzle by using the ion wind.
Patent KR-20040066676-A (KR)
Inventor: KIM JUN HAN
IPC: H01L21/02
Filed: 2003-01-20
Abstract: PURPOSE: Semiconductor fabricating equipment having a pressure measuring apparatus with a cooling unit is provided to precisely measure a pressure regardless of an outer temperature by constructing a semiconductor fabricating equipment in a way that the temperature of the pressure measuring apparatus is uniformly maintained. CONSTITUTION: A predetermined process is performed in at least one process chamber(10). A pressure measuring apparatus(20) measures the vacuum inside the process chamber, connected to the process chamber. A cooling unit(21) prevents the pressure measuring apparatus from being heated, installed in the pressure measuring apparatus.
Patent KR-20030064625-A (KR)
Title: 다채널 선형 레이저광 빔을 이용한 열전달에 의한ｏｌｅｄ 디바이스의 제조
IPC: H05B33/10
Filed: 2003-01-23
Abstract: 본 발명은, 
     전달가능한 유기 물질을 갖는 도너 소자를 OLED 기판과의 전달 관계로 제공하는 단계; 
     실질적으로 균일한 선형 레이저광 빔 형성하는 단계; 
     상기 선형 레이저광 빔에 반응하고 다채널 선형 레이저광 빔을 형성하도록 된 공간 광 변조기(spatial light modulator)를 제공하는 단계; 
     선택된 채널을 개별적으로 변조시켜, 각각의 세그먼트(segment)가 1개 이상의 레이저광 빔 채널을 포함할 수 있고, 레이저광 빔 세그먼트(들)가 제 1 방향으로 실질적인 사각형 강도 프로파일과 상기 제 1 방향에 수직인 제 2 방향으로 실질적인 가우스 강도(Gaussian intensity) 프로파일을 가지며 도너 소자 상으로 향하는 1개 이상의 레이저광 빔 세그먼트를 형성하는 단계; 및 
     변조된 세그먼트로부터의 광에 반응하여 도너 소자가 열을 생성시켜 유기 물질을 기판의 선택된 영역상으로 열 전달하는 단계를 포함하는 OLED 디바이스의 제조방법에 관한 것이다.
Patent KR-20040070411-A (KR)
Inventor: HWANG BOK SUP
IPC: F03G7/00
Filed: 2003-02-03
Abstract: PURPOSE: A power equalizing and generating device is provided to reduce power consumption by mutually compensating power and to cut down the manufacturing cost of products. CONSTITUTION: A motor(2) operates gears(3,4) and an input shaft(5). Helical gears(7,18) and an input flywheel(9) are operated by bearing units(6,8). An equalizing bar(11) moves up and down by a wheel bearing(10) to input power. When the equalizing bar after an equalizing support(13) changes an output flywheel(15) into rotary motions, the input helical gears and a shaft(20) are operated with moving helical gears(22,23) and the output flywheel is smoothly rotated by operating a shaft(17). An equalizing device(12) equalizes the power to be output and mutually compensates the power, and accordingly, the shaft operates bearing units(16,24) and gears(25,26) and outputs the power to an output shaft(27).
Patent KR-20040070880-A (KR)
Inventor: KIM UI SIK
IPC: H01L21/335
Filed: 2003-02-05
Abstract: PURPOSE: A method for forming a silicide layer of a semiconductor device is provided to reduce the width of a depletion region and improve a characteristic of the semiconductor device by making titanium atoms positioned under a source/drain and in a gate electrode and by increasing the density of dopants under the source/drain by a subsequent heat treatment process. CONSTITUTION: Impurity ions are implanted into a gate electrode(13) and a silicon substrate(11) at both sides of the gate electrode. Titanium ions are implanted into the gate electrode and the substrate at both sides of the gate electrode. The first heat treatment process is performed to form a source/drain(15) in the silicon substrate while the silicon density under the source/drain is increased. After a metal layer is formed on the resultant structure, the second heat treatment process is performed to form a silicide layer on the gate electrode and the source/drain by reaction of metal and silicon.
Patent KR-20040072848-A (KR)
Inventor: JUNG MOON GYUNG
IPC: F24C3/14
Filed: 2003-02-11
Abstract: PURPOSE: A heating pot unit and a burner unit employing the same are provided to reduce the time required for heating an object by increasing the wind-blocking, combustion, and insulating efficiencies. CONSTITUTION: A burner unit employing a heating pot unit includes an inner container part(112) with an opened top part for receiving an object. A dual tube part is extended from an upper end of the inner container part below a bottom surface of the inner container part with a distance from the inner container part for forming a combustion channel from an outer wall extended upward from the upper end of the inner container part. A wind-blocking plate(117) is mounted to the dual tube part to face an outer surface of the dual tube part where exhaust holes(114d) are arranged. The wind-blocking plate has through holes(117b) to be communicated with the exhaust holes, wherein the through holes have an area larger than the exhaust hole array area.
Patent KR-20040074312-A (KR)
Inventor: SIM JIN SEOP
IPC: G11C7/10
Filed: 2003-02-17
Abstract: PURPOSE: A method for forming an ESD protection circuit of a semiconductor device is provided to minimize parasitic capacitance of a PPS(PMOS Pass Structure) device or an NPS(NMOS Pass Structure) device. CONSTITUTION: According to the semiconductor device comprising an input pad part(10) and an ESD protection circuit part and an input buffer part and an internal circuit part, a capacitance adjustment part(50) comprising a number of bidirectional diodes(56) between an output port of the input part and an input part of the ESD protection circuit part. The bidirectional diodes are connected in parallel. The bidirectional diodes are formed with poly. The ESD protection circuit part is formed with a PPS device or an NPS device.
Patent KR-20040077080-A (KR)
Inventor: HWANG CHANG HOE
IPC: H01G4/12
Filed: 2003-02-27
Abstract: PURPOSE: A method is provided to achieve improved adhesive property between a coating layer and a ceramic body by spray coating a slurry made of zirconia powder. CONSTITUTION: A method comprises a step of producing a slurry for spray coating by using Y2O3 added zirconia powder having a mean particle diameter of 35 to 100§­; a step of spraying the slurry on a ceramic body(101) by using a nozzle, and drying the resultant structure; and a step of drying the ceramic body coated with zirconia coating layers(102,103) at a high temperature, and firing the resultant structure.
Patent KR-20040078311-A (KR)
Inventor: LEE CHEOL HUI
IPC: G06T7/00
Filed: 2003-03-03
Abstract: PURPOSE: An apparatus and a method for estimating picture quality of a moving picture are provided to objectively estimate quality of a moving picture and reduce a period of time required for estimating the moving picture quality. CONSTITUTION: An apparatus for estimating quality of a moving picture includes a source image input unit(10) for receiving a source image, an to-be-estimated image input unit(20) for receiving an image to be estimated, a contour extractor(30) for extracting the contour of the source image, and a mask image generator for generating a mask image from the output image of the contour extractor. The apparatus further includes a signal-to-noise ratio calculator(50) for receiving an image input to the source image input unit, corresponding to the mask image, and an image input to the to-be-estimated image input unit and calculating a contour peak signal-to-noise ratio, and a picture quality estimating unit(60) for estimating picture quality from output data of the signal-to-noise ratio calculator.
Patent KR-20040080785-A (KR)
Inventor: LEE YONG
IPC: E03D9/08
Filed: 2003-03-13
Abstract: PURPOSE: A bidet is provided to replace and repair components by assembling an upper cover and a toilet seat selectively, and to promote the convenience on cleaning the polluted part and installing a bidet. CONSTITUTION: The bidet is composed of a main body(1) provided with a control box(C), an upper cover(11), a toilet seat(12) and an auxiliary frame(13). A cover connector(2) is provided with a hinge coupler(21) and a hinge projection(22) on the front of the body(1). A toilet seat connector(3) is provided with an adaptor fitting hole(31), a hinge adaptor(32) and a adaptor fixture(33) on the lower end of the cover connector(2). An upper cover(11) is provided with a pair of assembly units(111) and hinged on the cover connector(2). A toilet seat(12) is provided with a pair of fasteners(121) and hinged on the toilet seat connector(3).
Patent KR-20040081274-A (KR)
Inventor: KIM MAN GON
IPC: H05K9/00
Filed: 2003-03-14
Abstract: PURPOSE: A method is provided to allow for a mass production of sponge by reducing a manufacturing time, and achieve improved reliability by uniformly depositing a plating solution on a sponge. CONSTITUTION: A method comprises a step of dipping a sponge(10) having a width of 1000mm and a polyester mono filament(20) of 50 to 200mesh deposited on the sponge, into the solution of 40 Deg.C containing palladium chloride 0.2g/L and hydrochloric acid 300ml/L 10 weight%, and dipping the sponge into the solution of 45 Deg.C containing sulfuric acid 10 weight%; and a step of dipping the sponge into the electroless plating solution containing copper sulfate 7.5g/L, formalin 30ml/L, and EDTA 85g/L, for 10 minutes at the temperature of 45 Deg.C, and dipping the sponge into the electroless nickel solution containing nickel sulfate 30g/L, sodium phosphate 20g/L, and sodium ammonium 50g/L, for 10 minutes at the temperature of 40 Deg.C.
Patent KR-20040086893-A (KR)
Title: A refrigerator
Inventor: CHO SEONG HO
IPC: F25D23/00
Filed: 2003-03-22
Abstract: PURPOSE: A refrigerator is provided to promptly resolve a new load and improve the reliability by displaying an accurate position of the new load and resolution of the new load. CONSTITUTION: A plurality of load correspondence cooling modules(64,66,68,70) are installed at a storage compartment for sensing load of the storage compartment inside and jetting cold air to a position where the load is sensed. A display panel(80) displays the position and magnitude of the load sensed by the plurality of correspondence cooling modules, wherein the display panel displays the load of shelves and baskets(131,132,133,134) independently.
Patent KR-20030077453-A (KR)
Title: 겔 전해질, 그의 제조방법 및 용도
IPC: H01M6/14
Filed: 2003-03-25
Abstract: 본 발명은 고내구성을 가지는 균일한 겔 전해질 및 그러한 겔 전해질을 사용한 전지 또는 커패시터에 관한 것이다. 상기 겔 전해질은 전해염, 전해염용 용매 및 이기능성 (메쓰)아크릴레이트를 중합하여 제조되는 가교화 중합체를 포함하는 중합체 매트릭스를 함유하는 겔 조성물을 포함한다.
Patent KR-20040085463-A (KR)
Inventor: JANG SANG HUN
IPC: G06F17/00
Filed: 2003-03-31
Abstract: PURPOSE: A system and method for providing geographical information searching service using location code, and a recording medium for a computer installed a program for the same are provided to enable a user to search geographical information provided by a service provider, generate a location code by him/herself. CONSTITUTION: A screen display part(100) displays a menu and a screen. A service control part(110) includes a location searching part(112), a location code generation part(114), and a location code searching part(116). A location code generation part(114) makes a user generated desired location code, and the generated location code is stored at a DB(130). A location searching server(120) executes required search from the location searching part(112) using a location information DB(160), and transmits the searched location to the location searching part(112). An area searching server(140) refers a map information DB(170), and finds the requested location on a map.
Patent KR-20030055186-A (KR)
Inventor: AHN DONG HUN
IPC: G01S1/02
Filed: 2003-04-10
Abstract: PURPOSE: A radio buoy capable of tracking a position of a fish net in a GPS(Global Positioning System) navigator is provided to improve the accuracy of a display of a fish net position by transmitting an ID(Identification) code corresponding to a specific number of the radio buoy and data corresponding to a current position of the radio buoy. CONSTITUTION: A radio buoy ID generating unit(10) generates an ID code corresponding to a specific number of a radio buoy. A GPS receiving apparatus(30) receives data of a current position of the radio buoy from a GPS satellite. A radio buoy current position data generating unit(40) distinguishes the data outputted from the GPS receiving apparatus(30) to determine the current position of the radio buoy on a GIS(Geographic Information System) map and to output data corresponded to the current position. A radio modem(20) sends data outputted from the radio buoy ID generating unit(10) and the radio buoy current position data generating unit(40).
Patent KR-20040089261-A (KR)
Inventor: KO YEONG GU
IPC: G06F17/00
Filed: 2003-04-11
Abstract: PURPOSE: A method and a system for automatically registering device certification information are provided to efficiency prevent a home device in a specified group from being accessed from other group or an external device and allow access to only the home devices inside the group by automatically grouping the home device used in the group and controlling the access to the home device for each group. CONSTITUTION: A certification manager(301) discriminates the devices(102,103) allowing the access between home devices and the devices not allowed, and controls the access between home devices through certification. A user information collecting server(200) obtains a group ID by comparing the information for the home device obtained from the certification manager with the user information registered to databases(201,202).
Patent KR-20030083606-A (KR)
Title: 반도체 회로 시스템의 보호 회로부
IPC: H01L27/08
Filed: 2003-04-18
Abstract: 반도체 회로 시스템은 상호 전기적으로 분리된 제1, 제2 및 제3 외부 단자(11, 15, 14)를 갖는다.  제1 외부 단자에는 통상 동작 시에 제1 전원 전압이 공급된다.  회로 시스템의 보호 회로부는, 서지 전류를 통과시키기 위한 정류 소자(SCR)를 포함한다.  정류 소자는 등가적으로 사이리스터를 형성하도록 상호 조합된 PNP 트랜지스터(Q5) 및 NPN 트랜지스터(Q6)를 포함한다.  정류 소자의 전류 통로는 보호 대상부가 접속된 특정 단자와 제3 외부 단자와의 사이에 접속된다.  보호 회로부는, 또한 제2 외부 단자에 입력되는 서지 전압에 기초하여 정류 소자를 트리거하기 위한 제1 PMOS 트랜지스터(QP)를 포함한다.  제1 PMOS 트랜지스터의 전류 통로는 제2 외부 단자와 NPN 트랜지스터의 베이스와의 사이에 접속된다.  제1 PMOS 트랜지스터의 소스와 채널 영역은 상호 접속된다.  제1 PMOS 트랜지스터의 게이트는 제1 외부 단자에 접속된다.
Patent KR-20030036574-A (KR)
Title: A detergent for soundproofed wall and tunnel
Inventor: LEE SUNG BAE
IPC: C11D3/04
Filed: 2003-04-22
Abstract: PURPOSE: A detergent for a soundproof wall and a tunnel is provided, to remove the pollutants(carbon, scale and oil) on the wall in a short time with minimizing the environmental pollution and having no harmful effect to the human body of a worker. CONSTITUTION: The detergent comprises 10-20 wt% of at least one alkali material selected from the group consisting of sodium orthosilicate, sodium orthophosphate, sodium bicarbonate, sodium metasilicate, sodium tripolyphosphate and sodium hexametaphosphate; 0.1-2 wt% of a low foaming surfactant; 0.1-2 wt% of a permeating agent; 0.1-2 wt% of a buffering co-agent; 0.1-2 wt% of a structure stabilizer; and 72-89.6 wt% of an ion exchange water. Also the detergent comprises 10-20 wt% of an acid mixture comprising citric acid, glycolic acid and sulfamic acid in an equal ratio, 0.1-2 wt% of a low foaming surfactant; 0.1-2 wt% of a permeating agent; 0.1-2 wt% of a buffering co-agent; 0.1-2 wt% of a structure stabilizer; 0.1-2 wt% of a corrosion inhibitor; and 72-89.6 wt% of an ion exchange water. Preferably the low foaming surfactant is at least one selected from the group consisting of polyoxyethylene nonylphenyl ether, diethylene glycol monostearate, diethylene glycol fatty acid ester, and sodium ester of linear C-14 alcohol sulfate.
Patent KR-20040092280-A (KR)
Inventor: KIM SI HAN
IPC: H04B1/38
Filed: 2003-04-25
Abstract: PURPOSE: An optical opening device for a mobile phone is provided to use a display as a mirror when the display is not used, and improve the permeability of light emitted from the display when the display is used. CONSTITUTION: An optical opening device(220) is installed on the top side of a display(2) of a display unit(20). A protective window(150) is installed on the top side of the optical opening device(220), wherein the protective window(150) is coated with a reflective surface(151).
Patent KR-20040093894-A (KR)
Inventor: PARK GI DEOK
IPC: G11C7/06
Filed: 2003-04-30
Abstract: PURPOSE: A semiconductor memory device reducing noise during its operation is provided to reduce the noise by supplying a clamping voltage to each bank of the memory device. CONSTITUTION: The semiconductor memory device comprises a number of banks(110,120,130,140), and a number of clamping voltage supply units(150,160,170,180) corresponding to each bank and supplying a clamping voltage to each corresponding bank by clamping an external power supply voltage with a constant level. And a clamping voltage control unit(200) controls the clamping voltage supply units so that the clamping voltage supply unit can supply the clamping voltage to the selected bank while the selected bank is enabled.
Patent KR-20040093941-A (KR)
Inventor: SIM MI HWA
IPC: F24C7/08
Filed: 2003-04-30
Abstract: PURPOSE: An automatic cooking control method of a microwave oven is provided to reduce the burning-up degree of foods by continuing and completing a cooking operation with a power-off zone by applying a turn-over non-operation algorism if a user doesn't hear a turn-over beep signal and turn over the foods. CONSTITUTION: An automatic cooking control method of a microwave oven is composed of steps for starting to perform an automatic cooking of the microwave oven(S301); generating a turn-over beep signal as the upside of the foods is completed after starting the automatic cooking(S302); deciding if a user turns over the foods after making the turn-over beep signal(S303); and performing the automatic continuous cooking again if a door is opened or applying a turn-over non-operation algorism for the opposite condition(S305). The turn-over non-operation algorism performs continuously the automatic cooking if the microwave oven stops after sounding the turn-over beep signal for 10 seconds or continues and finishes to cook the foods by a power-off zone.
Patent KR-20040093993-A (KR)
Inventor: LEE WON HO
IPC: H01L31/062
Filed: 2003-04-30
Abstract: PURPOSE: A unit pixel of a CMOS image sensor is provided to enhance reset efficiency under a low input voltage by removing lag of an output voltage and to stabilize process by using a butting contact with high aspect ratio instead of a metal contact. CONSTITUTION: A unit pixel comprises a photodiode(21), a transfer transistor(22), a reset transistor(24), a drive transistor(25), and a select transistor(26). A source-drain path of the transfer transistor is formed between the photodiode and a floating node(23), and a control signal(Tx) is applied to a gate. In the reset transistor, a source-drain path is formed between the floating node and a power voltage node(VDD) and a control signal(Rx) is applied to a drain. In the drive transistor, a gate is connected to the floating node and a drain is connected to the power voltage node. In the select transistor, a control signal(Sx) is applied to a gate, a drain is connected to the source of the drive transistor, and a source is connected to an output node. The reset transistor has the same threshold voltage to the drive and select transistor, and has high threshold voltage compared to the transfer transistor.
Patent KR-20030089505-A (KR)
Title: 신호 처리 시스템 및 방법, 신호 처리 장치 및 방법, 기록매체, 및 프로그램
IPC: G06F13/00
Filed: 2003-05-16
Abstract: 신호 처리 장치의 신호 처리의 복수의 기능을 선택하여, 이용할 수 있도록 함과 함께, 신호 처리의 내용을 변경하는 정보가 갱신된 경우, 그 갱신된 정보를 은닉성을 확보하면서 제공할 수 있도록 한다.  알고리즘베이(12)가 제1 접속 형태로 신호 처리 장치(11)에 접속되어 있는 경우, 알고리즘베이(12)의 셀렉터부(34)는, 신호 처리 장치(11)의 신호 처리의 기능으로서, 제1 기능 제공부(32)로부터 제공되는 제1 기능을 선택하여, 그것으로 변경한다. 이것에 대하여, 알고리즘베이(12)가 제2 접속 형태로 신호 처리 장치(11)에 접속되어 있는 경우, 알고리즘베이(12)의 셀렉터부(34)는, 신호 처리 장치(11)의 신호 처리의 기능으로서, 제2 기능 제공부(33)로부터 제공되는 제2 기능을 선택하여, 그것으로 변경한다.  또한, 알고리즘베이(312)의 제1 정보 제공부(333)는, 신호 처리 장치(311)의 신호 처리부(321)의 신호 처리에서 이용하는 제1 정보를 나타내는 신호를, 신호 처리부(321)에 대하여, 유선 인터페이스(331), 유선(343), 및, 유선 인터페이스(322)를 통하여 공급함과 함께, 제2 정보 제공부(333)는, 신호 처리부(321) 의 신호 처리의 내용을 변경하기 위한 제2 정보를 나타내는 신호를, 신호 처리부(321)에 대하여, 무선 인터페이스(332), 무선(344), 및, 무선 인터페이스(323)를 통하여 공급한다.  본 발명은, 화상 신호를 출력하는 화상 신호 처리 장치에 적용 가능하다.
Patent KR-20030091684-A (KR)
Title: 전기 광학 장치 및 전자기기
IPC: G02F1/1335
Filed: 2003-05-20
Abstract: 본 발명에 따른 전기 광학 장치는 한쪽의 기판 상에, 화소 전극과, 이것에 접속된 박막 트랜지스터를 구비한다.  또한, 다른 쪽의 기판 상에 차광막을 구비한다.  이 차광막은 데이터선 및 주사선이 서로 교차하는 교차 영역에서, 각 화소의 개구 영역에 코너 절단부를 규정하는 확장부를 갖는다.  박막 트랜지스터의 채널 영역은 상기 교차 영역 내에 배치되어 있다. 
     이것에 의해, 전기 광학 장치에 있어서, 내광성을 높여 고품위의 화상을 표시한다.
Patent KR-20040100512-A (KR)
Inventor: CHO WON CHEOL
IPC: H01L21/66
Filed: 2003-05-23
Abstract: PURPOSE: A method of inspecting a semiconductor device is provided to easily find out a short path between upper and lower fine metal lines by removing the lower metal line of a short portion using chemicals and securing a piece of objective evidence using an image of SEM for the short portion. CONSTITUTION: A semiconductor device has the short between upper and lower metal lines. The upper metal line is exposed to the outside and an insulating layer between the upper and lower metal lines is maintained. The resultant structure is treated by using etching chemicals. The chemicals are capable of etching all the upper and lower metal lines. The lower metal line is exposed to the outside by removing the insulating layer of a short portion. A short path is checked by using an image of SEM.
Patent KR-20040102693-A (KR)
Inventor: LEE DONG PIL
IPC: H04L12/66
Filed: 2003-05-29
Abstract: PURPOSE: An Internet phone providing system and method are provided to easily provide various services through voice data processing such as recording, executing or modulating voice data by using a voice board, and provide services at a relatively low cost. CONSTITUTION: A network connecting unit(520) is connected with and transmits/receives information to/from the Internet and other communication networks. A protocol controller(540) receives an IP address and a port number of a caller terminal from the caller terminal and allocates a channel for transmitting/receiving voice data to/from the caller terminal. A voice processing unit(560) includes one or more channels and transmits/receives voice data to/from the caller terminal through the channel allocated to the caller terminal designated by the protocol controller(540).