baber/WOPTO huggingface dataset:
Patent KR-20010101045-A (KR)
IPC: C30B15/14
Filed: 1999-11-19
Abstract: 초크랄스키법(CZ법)으로 실리콘 단결정을 성장시킬 때, 인상 속도를 V(mm/min)로 하고, 실리콘 융점으로부터 1,350℃까지의 온도 범위에서의 인상 축방향의 결정내 온도 경사의 평균치를 G(℃/mm)라고 할 때, V/G의 값을 결정 중심 위치와 결정 외주까지의 위치의 사이에서 0.16 mm 2 /℃ㆍmin ∼ 0.18 mm 2 /℃ㆍmin 으로 하고, 실리콘 융점으로부터 1,350℃까지의 온도 범위에서의 인상 축방향의 결정내 온도 경사의 평균치 G의 결정 외측면과 결정 중심의 값의 비(G 외부 /G 중심 )를 1.10 이하로 하여, 고품질 완전 결정 실리콘 웨이퍼를 얻는다.  또한, 이러한 완전 결정 실리콘 웨이퍼에 있어서, 산소 농도를 13×10 17 atoms/cm 3 이하로 제어하고, 초기 투입 열처리 온도를 적어도 약 500℃ 이하로 하여, 적어도 약 700℃로부터 약 900℃까지 1℃/min 이하의 속도로 온도 상승시킴으로써, 임의의 산소 석출물 밀도 레벨에 웨이퍼면내 분포를 균일화하는 것을 실현한다.
Patent KR-20010089553-A (KR)
IPC: C21C7/00
Filed: 1999-01-20
Abstract: 본 발명은 전기 아크로 내에서 스테인레스 강의 용융 중에 슬래그 내의 크롬 함유량을 환원시키는 방법에 관한 것이며 강 스크랩과 첨가 합금은 전기 아크로 내에서 용융되며, 그후 용융 강과 슬래그는 레이들 내로 출탕되고 레이들 내의 강으로부터 슬래그를 제거하며, 용융 강을 레이들로부터 전로로 전달하며, 전로에서 강은 정련되고 강의 화학적 조성은 합금 원소의 첨가에 의해 조절된다.  본 발명에 따라 미세한 입자의 페로규소가 슬래그와 강이 용융되는 시간 간격 동안, 그러나 용융 강과 슬래그가 레이들로 출탕되기 전에 슬래그에 첨가된다.
Patent KR-20010099878-A (KR)
Title: Method for Reprocessing Reaction Mixtures Containing Diaryl Carbonate
IPC: C07C69/96
Filed: 1999-12-09
Abstract: A process for the work up of a reaction mixture obtained from the preparation of diaryl carbonate by direct carbonylation of aromatic hydroxy compounds is disclosed. The process entails obtaining a reaction mixture that contains diaryl carbonate, aromatic hydroxy compound, water, base and quaternary salt, separating the mixture in a distillation apparatus having only one theoretical separation stage into a liquid phase and a gas phase and recycling the liquid phase without further work up to the reaction step of the direct carbonylation.
Patent KR-20010099903-A (KR)
Title: Device for reducing signal noise in a fetal ECG signal
IPC: A61B5/366
Filed: 1999-12-22
Abstract: Apparatus for reducing signal noise in a fetal ECG signal obtained by using a unipolar ECG lead configuration 1, 3 thereby detecting a predominant T wave vector and avoiding changes in ECG waveform shape due to fetal rotation through the birth canal. The ECG signal is transmitted by means of a first signalling link 5 to the signal noise reducing components which include a conventional analogue filter 7, a digital high pass filter 9 for attenuating low frequencies and with a predetermined cut-off frequency, the cut-off frequency being essentially between 0.2 and 1.7 Hz, and a further digital filter 11. The filtered ECT signal is arranged as output signal from the electrical arrangement by means of a second signalling link 13.
Patent KR-20020013502-A (KR)
Title: Recombined porcine adenovirus based viral vaccines and vectors
IPC: C12N15/861
Filed: 2000-02-08
Abstract: An in vivo replicative and recombined porcine adenovirus characterized in that it comprises a heterologous nucleotide sequence inserted into the porcine adenovirus in conditions enabling the latter to be replicated in vivo and to express the inserted heterologous nucleotide sequence, and in that the adenovirus genome comes from a 3 or 5 serotype (PAV-3 or PAV-5) adenovirus. Insertion occurs in a non-essential zone of the E3 region, preferably with deletion of said zone. The invention also relates to a recombined porcine vaccine comprising one such porcine adenovirus. The invention further relates to a serotype 3 or 5 porcine adenovirus vector that is replicative in vivo and is deleted in a non-essential region of the genome thereof. The invention also relates to a DNA fragment comprising all or part of the referenced SEQ ID NO.5 nucleotide sequence.
Patent KR-20020005597-A (KR)
IPC: A61B6/06
Filed: 2000-12-14
Abstract: X선 검출기 어레이의 수를 감소시키고 구성을 단순화하면서, 다수의 실제적인 슬라이스 두께(practical slice thickness)를 갖는 다수의 X선 단층 촬영 이미지(X-ray tomographic image)를 복원하기 위한 목적으로, X선 튜브(tube)(4)에 의해 생성된 X선이 시준기(collimator)(6)의 슬릿(slit)(15)을 통해, X선 튜브(4)에 대향하여 배치된 검출기(8) 쪽으로 방사되고, D1 방향에서의 시준기(6)의 슬릿(15) 길이(폭) 및 D1 방향에서의 시준기(6) 위치는 조절가능하며, 검출기(8)는 4 개의 X선 검출기 어레이로 구성되고, D1 방향에서의 2 개의 바깥쪽 X선 검출기 어레이의 폭은 2 개의 중앙 X선 검출기 어레이의 폭보다 크다.
Patent KR-20010102417-A (KR)
IPC: G06J1/00
Filed: 2000-10-17
Abstract: 본 발명은 제 1 및 제 2 집적 회로(IC)간에 인터페이스 신호를 생성한다.  상기 회로는 기준 신호, 인터페이스 회로 및 회로 엘리먼트를 제공하는 기준 회로를 포함한다.  상기 인터페이스 회로는 상기 제 1 IC상에 형성되고, 상기 기준 회로에 동작가능하게 접속하고, 상기 기준 신호 및 데이터 입력을 수신하고, 상기 인터페이스 신호를 생성한다.  상기 회로 엘리먼트는 상기 제 2 IC상에 형성되고, 상기 제어 회로에 동작가능하게 접속하고, 상기 인터페이스 신호를 수신하며 출력 신호를 제공한다.  상기 기준 신호는 전압 또는 전류 신호일 수 있으며 상기 제 1 또는 제 2 IC에서 생성될 수 있다.  상기 인터페이스 회로는 스위치 어레이에 접속된 전류 미러로 형성될 수 있으며, 상기 필터링 요구를 용이하게 하도록 오버샘플링될 수 있다.  상기 인터페이스 신호는 다수 비트(예를 들어, 4, 8, 또는 그 이상)의 분해능을 갖는 차동 전류 신호일 수 있다.  상기 회로 엘리먼트는 예를 들어,  VGA, 변조기 또는 다른 회로들일 수 있다.
Patent KR-20020015712-A (KR)
Title: The drum-leather manufacturing method
Inventor: CHOI GWANG SIK
IPC: C14C1/08
Filed: 2002-01-11
Abstract: PURPOSE: Provided is a preparation method of the skin of a drum which determines the sound of our traditional musical instrument. The drum consists of a wood cylinder and animal skin covering the cylinder. The skin is an important part and generates sound waves by vibration and wave length when being struck with drum stick or hand. The skin prepared through various physical and chemical treatment increases its strength, moisture resistance, is not attacked by fungi and keeps the skin from expansion or constriction due to temperature change. CONSTITUTION: The preparation method comprises: a lime process(10) in which the dehaired skin is put into a drum with 0.1-6.0wt.% (based on the weight of skin) of calcium hydroxide and the drum is rotated for 0.5-24 hours to make the skin smooth; a deliming process(20) where the above skin is neutralized by rotating the drum with 0.1-6.0wt.% of ammonium chloride and 0.1-6.0wt.% of ammonium sulfate for 0.1-6 hours; a bating process(30) where the drum is rotated for 0.2-6 hours with 0.1-4.0wt.% of bating agent to make the skin clean and flexible; an acid treatment process(40) wherein 0.1-15.0wt.% of salt is added to the drum after deliming and bating process(20)(30), rotating for 0.02-6 hours, adding 0.1-5wt.% of hydrogen peroxide and rotating 5-12 hours, adding 0.1-5.0wt.% of formic acid and 0.1-5wt.% of sulfuric acid and rotating for 0.1-36 hours to enhance the permeability of chemicals; a tanning process(50) wherein 0.1-5wt.% of fat liquoring agent(animal, plant and mineral oil), 0.1-20.0wt.% of aluminum tanning agent, 0.1-20.0wt.% of zirconium tanning agent, 0.1-20.0wt% of anti-bacterial agent are added and rotated for 1-24 hours, adjusting pH to 0.1-8.0 by adding sodium carbonate to increase the strength of the skin; a retanning process(60) wherein sodium bicarbonate is added to the above tanned skin, adjusting pH to 2.0-8.0, adding 0.1-20.0wt.% of the phenolic firewood and rotating for 0.2-6 hours to raise its smoothness; a fat liquoring process(70) wherein 0.1-30.0wt.% of fat liquoring agent is added to the above retanned skin, rotating for 0.2-12 hours and adding formic acid to make pH to 1.0-6.0 so that its flexibility is increased; and a dying process(80) wherein 0.1-10.0wt.% of natural dye and plant dye containing tannin is added and treated for 0.2-10 hours and dried.
Patent KR-20020067896-A (KR)
Title: Bone screw
Inventor: BERND SCHAFER
IPC: A61B17/70
Filed: 2002-01-28
Abstract: PURPOSE: A bone screw is provided, which has merits that a nut is no more be mounted on a screw thread, and positioned just on a free end of a forked head, thereby has effects to be closed easily even in difficult situation which cannot secure the sufficient eye sight. CONSTITUTION: The bone screw includes a forked head(16) on which grooves for inserting a corrective rod(12) and a screw shaft(14) are formed and a nut(18) closed on a free end of the forked head, the free end of the forked head and nut(18) forming a bayonet joint. The free end includes a projection part to protrude outward radially. The projection part is extended along the peripheral length of the free end. The inner circumference side of the nut(18) has two nose protruded inward radially.
Patent KR-20030065672-A (KR)
Title: tabacco improvement
Inventor: BAE DAE MYUNG
IPC: A24B15/00
Filed: 2002-01-30
Abstract: PURPOSE: Provided is a cigarette improver which lessens the noxious degree of the poisonous component emitted from the smoke, the unpleasant sensation of people around smoker due to smoking and the sputum symptoms caused by smoking. CONSTITUTION: The cigarette improver comprises Sanguisorba officinalis. The cigarette improver has the elongate cylindrical shape so as to be inserted into the cigarette. The elongate cylindrical shape is made by sharpening the Sanguisorba officinalis or powdering the Sanguisorba officinalis and then pressing it. The cigarette comprising the improver is prepared by powdering the Sanguisorba officinalis, adding the water to make into a thin paper, then cutting it into size of cigarette leaf and mixing it with the cigarette leaves. The content of the improver in the cigarette is 3 to 50 wt.% based on the total weight of cigarette leaves.
Patent KR-20030071224-A (KR)
Title: Brightness control apparatus of portion
Inventor: PARK GWANG HO
IPC: H04N5/57
Filed: 2002-02-28
Abstract: PURPOSE: A device for controlling local luminance is provided to locally adjust luminance of an image display system. CONSTITUTION: A device for controlling local luminance includes a video amplifier(216), an amplification controller(208), a horizontal/vertical composite waveform generator(202), an amplifier(204), and a superposition unit(206,D1). The video amplifier receives a video signal and amplifies the video signal according to a voltage applied to an amplification control terminal of the video amplifier. The amplification controller outputs an amplification control voltage for adjusting luminance of the entire screen. The horizontal/vertical composite waveform generator generates a horizontal/vertical composite waveform corresponding to a local region. The amplifier amplifies the composite waveform. The superposition unit superposes the composite waveform on the amplification control voltage to apply the superposed signal to the amplification control terminal of the video amplifier.
Patent KR-20030071307-A (KR)
Title: Manufacturing method for divice junction Josephson superconductor
Inventor: KIM HONG GYU
IPC: H01L39/22
Filed: 2002-02-28
Abstract: PURPOSE: A method for fabricating a superconducting Josephson junction device is provided to form an interface of a Josephson junction by using a silicon layer and a thermal oxidation process so that the silicon layer protects the Josephson junction interface from moisture. CONSTITUTION: A superconducting thin film(11) is formed on a substrate(10). A silicon layer(12) is formed on the superconducting thin film to open a predetermined region. An oxide layer is formed in a part of the silicon layer. Ions are implanted into the superconducting thin film by using the oxide layer as a mask to form an interface in the superconducting thin film.
Patent KR-20030075874-A (KR)
Title: Algae-lysing bacteria acinetobacter sp. kfcc 11296 and the method for removing algae using the same
Inventor: BANG SANG WON
IPC: C12N1/20
Filed: 2002-03-21
Abstract: PURPOSE: An algae-lysing bacteria Acinetobacter sp. KFCC 11296 and a method for removing algae using the same microorganism are provided, thereby effectively solving environmental problems caused by algae. CONSTITUTION: An algae-lysing bacteria Acinetobacter sp. KFCC 11296 containing 16S rDNA having the nucleotide sequence of SEQ ID NO: 1 is provided, wherein Acinetobacter sp. KFCC 11296 is isolated from Seokchon lake. A method for removing algae comprises culturing Acinetobacter sp. KFCC 11296 and applying the cultured medium of Acinetobacter sp. KFCC 11296 to algae living water, wherein the cultured medium of Acinetobacter sp. KFCC 11296 is obtained by culturing Acinetobacter sp. KFCC 11296 in BG-11 medium and centrifuging the cultured medium; the algae is blue-green algae; and the blue-green algae is Anabaena cylindrica. A bio-agent for control algae contains Acinetobacter sp. KFCC 11296 or the cultured medium thereof.
Patent KR-20020029663-A (KR)
Inventor: SON YOUNG SUK
IPC: A23L21/10
Filed: 2002-03-26
Abstract: PURPOSE: A process for making a preserve from mixing Chinese herb medicines, seaweeds, animals, minerals, mushrooms cereals and then fermenting is provided. Whereby, the preserve is a nutritionally well-balanced meal and useful as health auxiliary food. CONSTITUTION: Cereals such as rice, barley, wheat, millet, adlay or the like are mixed with fruits such as apricot, ginseng, grape, pear, apple or the like, Chinese herb medicines such as tuberous root of Ophiopogon japonicus, Lycii Radicis Cortex, Saururus chinensis Baill or the like, mushrooms such as Ganoderma lucidum, Phellinus linteus or the like, minerals such as Fe, Ca, Mn or the like, fishes such as abalone, sea cucumber, cuttlefish or the like, fermentation products such as yogurt, edible oils, malt or the like, extracted and then fermented.
Patent KR-20020079433-A (KR)
Title: Dielectric ceramic composition and ceramic capacitor
Inventor: KAWAMOTO YASUNOBU
IPC: B32B18/00
Filed: 2002-04-03
Abstract: PURPOSE: To solve the problem that, when a green sheet is thinly layered for miniaturizing a ceramic capacitor and enlarging its capacity, voltage applied per unit thickness increases, the life time of a dielectric layer is shortened, and the reliability on the multilayer ceramic capacitor is reduced. CONSTITUTION: A sintered compact containing the oxide of Ba, Ti and Zr by 100 mol% expressed in terms of Ba(Ti1-xZrx)O3 (wherein, x in Ti1-xZrx satisfies 0.05<=x<=0.26), the oxide of Re (Re is one or more kinds selected from Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Y) by 0.25 to 1.5 mol% expressed in terms of Re2O3, the oxide of Mg by 0.1 to 0.4 mol% expressed in terms of MgO, the oxide of one or more kinds selected from Mn, V and Cr by 0.03 to 0.6 mol% expressed in terms of Mn2O3, V2O5 and Cr2O3, respectively, and the oxide of Mo and/or W by 0.025 to 0.3 mol% expressed in terms of MoO3 and WO3, respectively, and further containing SiO2 or a glass component including SiO2 in a prescribed ratio is used as the material for the dielectric layer of the ceramic capacitor.
Patent KR-20020079572-A (KR)
Inventor: MORISHITA NOBUYASU
IPC: H02J7/10
Filed: 2002-04-10
Abstract: PURPOSE: To provide a method for controlling charging of a secondary battery which prevents a valve operation in charging the battery mounted in an unmanned conveying vehicle and which suppresses a memory effect of a charging side. CONSTITUTION: The method for controlling charging of a secondary battery for the unmanned conveying vehicle comprises steps of charging the secondary battery by a charging current value of 0.5C to 4C, detecting a current flowing to the battery, calculating the remaining capacity of the battery by integrating at least the detected current, and finishing the charging of the battery when the calculated remaining capacity becomes a threshold preset range of 60% or more and 95% or lower.
Patent KR-20030080801-A (KR)
Title: Optical pick up actuator having triaxial driving function
Inventor: LEE HO CHEOL
IPC: G11B7/09
Filed: 2002-04-11
Abstract: PURPOSE: An optical pickup actuator having a triaxial driving function is provided to maintain a certain gap by enlarging a thrust constant without changing the size of a gap between magnets and a coil, thereby compensating aberration due to distortion of a disk. CONSTITUTION: A blade(10) includes an objective lens(11) installed on one side, tracking and focusing coils(12,13) inside, and a plurality of magnets(15) for a tilt attached to a rear surface. A yoke plate(20) includes internal and external yokes(22) to attach magnets(21) for realizing tracking and focusing motion. A plurality of suspension wires(30) are electrically connected with the tracking and focusing coils on both sides of the blade. A wire holder(40) includes a fixing part(41) for supporting one ends of the suspension wires and a yoke insertion part(42) for inserting a yoke(23) for a tilt, and a PCB(Printed Circuit Board)(43) electrically connecting the suspension wires. A coil(50) for a tilt is guided to an external circumference of the yoke insertion part for generating electromagnetic force to the magnets for the tilt.
Patent KR-20020032500-A (KR)
Inventor: NAM SANG CHAE
IPC: A47J36/34
Filed: 2002-04-12
Abstract: PURPOSE: A handle having a link type detaching structure is provided to utilize a sufficient stacking space by detachably forming the handle to a vessel. CONSTITUTION: A handle(10) is made by injection-molding a synthetic resin. The handle(10) includes an upper handle(100) and a lower handle(200). The upper handle(100) is coupled to the lower handle(200), thereby forming a circular shape. An inverted L-shaped supporting member(110) is mounted on a front of the upper handle(100). A semicircular mounting part(111) is protruded from a rear portion of the inverted L-shaped supporting member(110) so as to be coupled with a slot(101) of the upper handle(100). A supporting protrusion(112) is formed at a lower portion of the semicircular mounting part(111). An elongated hole(102) is formed at a rear portion of the inverted L-shaped supporting member(110). A button(120) is formed on an upper portion of the elongated hole(102). The button(120) is connected to an operating member(130) provided in the upper handle(100).
Patent KR-20030085207-A (KR)
Title: Dust collecting filter of air cleaner
Inventor: CHO HYEON UK
IPC: B03C3/34
Filed: 2002-04-29
Abstract: PURPOSE: A dust collector having a simple structure assembled in an air-cleaner is provided to collect charged dust with improved capturing efficiency. CONSTITUTION: The air-cleaner comprises a cabinet(52) having an air dispenser port(51), an inhalation grill(54) having an air-inhalation port(53) and placed at front side of the cabinet(52), a blower(56) for forcedly circulating fresh air outside the air cleaner into the cabinet(52), an air-filter(58) for screening the dust in the inhaled air and placed at rear side of the grill(54), a dust-collective filter for charging the dust with high-voltage in the air and placed at rear side of the air filter, a high-voltage generator(91), a photo-catalyst filter(92) for removing bad odor at rear side of the filter; and a barrier(94) having a blowing hole(93) to partition inner space of the cabinet(52) into a blowing chamber and a filtering chamber.
Patent KR-20030088610-A (KR)
Title: A beverage contained the deep sea water in the East Sea
Inventor: KIM KYU JONG
IPC: A23L2/38
Filed: 2002-05-13
Abstract: PURPOSE: A beverage such as a soft drink, fruit drink, sports drink, juices or the like prepared by using deep sea water drawn from a layer with a depth of 200 m or more below a sea level is provided. The beverage is rich in mineral salts and has low temperature stability and thus is effective in prevention of various diseases and maintaining good health. CONSTITUTION: Deep sea water of the East Sea located between the Korean peninsula and the Japanese islands, drawn from a layer with a depth of 200 m or more below a sea level is desalted and then used in the manufacture of a beverage in the range of 1 to 99% by weight, preferably 5 to 50% by weight.
Patent KR-20030092174-A (KR)
Title: Toothbrush with a bendable neck
Inventor: KIM DAE WOON
IPC: A46B7/06
Filed: 2002-05-27
Abstract: PURPOSE: A toothbrush with bendable neck is provided to allow users to brush the user's own teeth up and down with ease. CONSTITUTION: The toothbrush with bendable neck includes a neck(3) and a grip(5) of the toothbrush(1) separately; plural fixing holes(4a,4b,4c) on the end of the neck(3) which has a rotating part(4) in a single unit; an installation groove on front part of the grip(5); and a stopper(6) on the middle part(5c) of the grip(5), built with a spring(6s) and a plug(6p) which can be operated with a knob(6n) to stop the rotating part(4).
Patent KR-20030093392-A (KR)
Title: Oxygen generator of air conditioner and control method thereof
Inventor: LEE GAP YEOL
IPC: F24F1/00
Filed: 2002-05-29
Abstract: PURPOSE: An oxygen generator of an air conditioner and a control method of the same are provided to prevent damage of an air compression of the oxygen generator placed in the air conditioner in winter by efficiently controlling the air compressor depending on temperature in the oxygen generator. CONSTITUTION: An inside temperature sensor(224) is installed in an oxygen generator, and detects temperature in the oxygen generator to transmit to a control part(202). The control part efficiently controls operation of an air compressor(214) depending on temperature in the oxygen generator detected by the inside temperature sensor so as to controls the air compressor correspondingly with the environment in which the air compressor is placed better than controlling the air compressor depending on temperature of an outside of the oxygen generator. The oxygen generator senses temperature therein to control operation of the air compressor when operation thereof is stopped. The air compressor is stopped and a cooling fan(212) is kept working to forcibly cool down the air compressor if the temperature in the oxygen generator is higher than 0 deg.C. The air compressor and the cooling fan are stopped to allow the air compressor to be cooled down naturally if the temperature in the oxygen generator is lower than 0 deg.C.
Patent KR-20020053044-A (KR)
Inventor: MUN YANG HO
IPC: H01L41/107
Filed: 2002-05-29
Abstract: PURPOSE: A piezoelectric transformer for high output is provided to increase input capacitance by stacking the piezoelectric transformers. CONSTITUTION: A piezoelectric transformer comprises a piezoelectric device(61) having a doughnut-type shape, an input electrode(INE) formed on a defined region of an upper surface of the piezoelectric device(61), an output electrode(OUTE) formed on the other region of the upper surface of the piezoelectric device(61) to electrically separate with the input electrode, and a ground electrode(GE) formed on the lower surface of the piezoelectric device(61). At this point, the piezoelectric devices(61) are stacked, thereby increasing an input power, increasing an output capacitance, easily performing an impedance matching with a load, and decreasing a vibration speed.
Patent KR-20030092579-A (KR)
Title: Method of fabrication capacitor using ruthenium
Inventor: KIM GYEONG MIN
IPC: H01L27/04
Filed: 2002-05-30
Abstract: PURPOSE: A method for fabricating a capacitor using a ruthenium layer is provided to reduce influence on a dielectric layer and improve an electrical characteristic of the capacitor by preventing agglomeration of a layer while eliminating the impurities and oxygen remaining in the ruthenium layer. CONSTITUTION: The ruthenium layer is deposited on a substrate. The impurities remaining in the ruthenium layer are eliminated in a mixture atmosphere of nitrogen and oxygen. The oxygen remaining in the impurity-free ruthenium layer is removed in an ammonia atmosphere. The ruthenium layer from which the impurities and the oxygen are removed is crystallized.
Patent KR-20030094723-A (KR)
Title: Apparatus of Providing Narrow-Band Service for ATM-PON System
Inventor: KIM JEONG HAK
IPC: H04L12/50
Filed: 2002-06-07
Abstract: PURPOSE: A device for supplying a narrowband service in an ATM-PON(Passive Optical Network) system is provided to install a V5 processor in an OLT(Optical Line Termination), and to assign a narrowband service subscriber channel to an ONU(Optical Network Unit), thereby implementing a small and low-cost optical subscriber device when designing the ONU. CONSTITUTION: A PSTN interface block(101) transceives a signal with a PSTN exchange(102), forms an STM(Synchronous Transfer Module)-1 or an STM-4 interface structure with a B-ISDN interface block in an OLT(103), consists of PSTN interface devices(1011,1012,1013), and consists of an STM interface device(1014) for forming the STM-1 or the STM-4 interface structure with the B-ISDN interface block. An ATM cell is transmitted to the B-ISDN interface block and the STM interface device(1014) through a cell bus backplane.