baber/WOPTO huggingface dataset:
Patent KR-19990086755-A (KR)
Title: 전기보온압력밥솥
IPC: A47J27/08
Filed: 1998-05-29
Abstract: 본 발명은 전기 보온압력밥솥에 관한 것으로서, 밥솥뚜껑 상측으로 노출된 핸들을 돌려서 개폐링이 핸들에 연동되어 원주방향으로 좁혀지거나 벌어지면서 내통뚜껑을 내통에 밀착/분리시킬 수 있도록 구성함으로써 내통뚜껑의 개폐를 보다 편리하게 수행할 수 있는 전기 보온압력밥솥을 제공함에 그 목적이 있다. 
     이를 위해 본 발명은 밥솥의 내부에 마련되는 내통과, 상기 내통을 덮을 수 있도록 밥솥뚜껑의 내측에 마련되는 내통뚜껑을 구비하는 전기 보온압력밥솥에 있어서, 상기 내통뚜껑 상면에 회전되게 축설되며, 그 상측단부는 상기 밥솥뚜껑 외부로 노출되게 형성되고, 그 하측단부 하면에는 타원형의 안내홈이 형성된 회전핸들; 상기 밥솥뚜껑과 상기 내통뚜껑 사이에 설치되어 상기 내통뚜껑 상면에 형성된 안내핀에 의해 원주방향으로 안내 이동되며, 상기 회전핸들의 회전에 따라 상기 내통뚜껑을 상기 내통에 개폐시킬 수 있도록 그 일측단부에는 상기 회전핸들의 안내홈에 삽입되는 안내돌기를 갖는 이동부가 형성되고, 그 타측단부에는 "ㄷ"자 측단면 형상을 갖는 록킹부가 형성된 개폐링으로 구성된다.
Patent KR-20000001563-A (KR)
Title: Method to optimize topology of i.e.e.e. 1394 serial bus
Inventor: JIN WI
IPC: H04L12/40
Filed: 1998-06-12
Abstract: PURPOSE: An optimization method is provided to optimize a topology of IEEE 1394 serial bus. CONSTITUTION: The optimization method comprises steps of priority assignment and port connection. In the priority assignment step, a priority is assigned to each node according to the number of ports and transmission speed. In the port connection step by the priority, a connection procedure is repeatedly performed so that each port of the nodes is connected together. In the connection procedure, an idle port of a node which is assigned as a first priority is connected to a port of a node which is assigned as a second priority.
Patent KR-20000003860-A (KR)
Title: Swinging angle control structure of swing heater for microwave oven
Inventor: PARK GEUN YONG
IPC: F24C7/02
Filed: 1998-06-29
Abstract: PURPOSE: A swinging angle control structure of a swing heater for a microwave oven is provided to enhance the assembling efficiency of a swing heater and to simplify the components. CONSTITUTION: A swinging angle control structure of a swing heater is installed by:many hanging grooves(1) formed on the circumference of a swing bracket(57) fixing a heater(54); a fixation protrusion(2) formed one end of the swing bracket to occasionally hung to the hanging groove; a bracket(62) to fix the other end of the swing bracket; and an elastic member(4) fixed to the central shaft of the swing bracket by a bolt(3) to limit its position.
Patent KR-20000004709-A (KR)
Title: Motor control device of drilling ship
Inventor: KANG JUNG DUK
IPC: E21B15/02
Filed: 1998-06-30
Abstract: PURPOSE: A motor control device of a drilling ship is provided to easily control a top drive motor and to improve productivity. CONSTITUTION: The motor control device of a drilling ship is installed with:a first transformer(100) for decompressing the alternating power of high voltage; a first variable control panel unit(200) for switching-transforming the decompressed alternating power to a direct and an alternating current power; a first mud pump motor(610) operated by the switching control of the first variable control panel unit; a second transformer(300) for decompressing a second mud pump motor(620), a top drive motor(630), and the alternating power of the high voltage; a second variable control panel(400) for switching-transforming the decompressed alternating power to the direct and the alternating current powers; a third and a fourth mud pump motors(640,650) operated by the switching control of the second variable control panel unit.
Patent KR-20000007177-A (KR)
Title: Corner reflection antenna
Inventor: JEON JU SEONG
IPC: H01Q3/12
Filed: 1998-07-01
Abstract: PURPOSE: A corner reflection antenna applied to a communication repeater is provided to enhance front-to-back ratio characteristics and efficiency of an antenna by improving reflection characteristics to a radio wave being incident over a reflection plate. CONSTITUTION: The corner reflection antenna comprises a reflection plate composed of a first reflection plate and a second reflection plate, a feeder device, and a feeder connector, wherein the first and the second reflection plates are symmetric to maintain a constant angle each other. In a reflection surface of the antenna, permeation holes are arranged with a constant spacing using a grid wire method and an edge of the reflection surface is improved to easily be adhered to a structure.
Patent KR-20000009595-A (KR)
Title: Contact spring apparatus for shielding electromagnetic wave
Inventor: LEE JAE YONG
IPC: H05K9/00
Filed: 1998-07-27
Abstract: PURPOSE: A contact spring apparatus shields a harmful electromagnetic wave generated in a communication device or electronic device. CONSTITUTION: A conductive contact spring apparatus(10) includes a mounting part(11) contacted with a main body panel, a tension part(12) bending one end of the mounting part, and a ground part(13) grounded with a door. The mounting part, the tension part and the ground part are integrated as one body in the contact spring apparatus. Many tension ribs(14) are projected toward the ground part at a proper position of the mounting part. The mounting part is inserted into one end of the main body panel, the one end of the main body is formed as a mounting groove for catching the tension ribs. Thereby, the number of assembling holes is reduced, and a production cost is reduced.
Patent KR-20000015088-A (KR)
Title: Apparatus and method for processing billing data between duplexed bmds in mobile communication switching system
Inventor: KIM CHANG-BEOM
IPC: H04M15/00
Filed: 1998-08-27
Abstract: PURPOSE: An apparatus capable of performing a normal billing data file transmission operation by a standby BWD when an active BWD gets out of order by duplexing a BWD into an active and standby BWDs and a method thereof are provided. CONSTITUTION: An apparatus for processing a billing data between duplexed BWDs in a mobile communication switching system, the apparatus comprising: a PCX(100) including an OMP disc(110) for storing a billing data file, a CDR(120) for controlling a storage operation of the OMP disc(110), and a CDSB(130) for transmitting the billing data file stored in the OMP disc(110); a BMD for receiving the billing data file transmitted to the CDSB(130), inserting, temporarily storing, and transmitting information necessary to transmit the billing data file; and a billing center(400) for receiving and storing the billing data file transmitted to the BWD in a disc.
Patent KR-20000015168-A (KR)
Title: Method for compensating delay of pilot signal in mobile telecommunication system
Inventor: CHO HYEONG UK
IPC: H04B7/26
Filed: 1998-08-27
Abstract: PURPOSE: A method for compensating delay of pilot signal in a mobile telecommunication system is provided to smoothly perform hand-off without blocking of a call by compensating for time delay of pilot signal due to the delay of transmission medium. CONSTITUTION: The method comprises the steps of: designating a first compensated pilot pseudo noise offset for compensating for time delay of pilot signal due to the delay of transmission medium by altering database; when transmitting telecommunication signal from multi-sector base station to a micro-base station, by allowing the multi-sector base station to process the telecommunication signal using the altered database, the first compensated pilot pseudo noise offset parameter, compensating the time delay due to the transmission medium and the time delay of the pilot signal. Thus, the method compensates for time delay due to the optical fiber transmission, periodically or by operator's request, thereby enhancing the reliability of the system.
Patent KR-19990023975-A (KR)
Title: 버스트 모드형 반도체 메모리장치
IPC: G11C11/413
Filed: 1998-08-28
Abstract: 버스트 기능을 갖는 본 발명의 반도체 메모리장치에서, 메모리회로(2)는 내부클럭신호(S4)와 동기하여 외부입력신호(A1-A10)에 대응하는 정보를 입출력한다.  버스트동작 제어회로는 버스트 동작모드와 대기모드를 전환시키는 외부기준클럭신호 CX 및 인에이블 신호 E1을 받아, 버스트 동작모드시에 외부입력신호의 공급을 중지시키고 대기모드시에 제 1 내부클럭신호의 발생을 중지시킨다.
Patent KR-19990029545-A (KR)
Title: 항복전압이 다른 전계효과 트랜지스터를 통한 대량 정전기 전류방전용 보호회로
IPC: H01L27/02
Filed: 1998-09-04
Abstract: 보호회로는 고전압선 (23) 과 저전압선 (24) 사이에 직렬로 접속된 p-채널 인핸스먼트형 전계효과 트랜지스터 (Qp11), 제 1 노드, 및 제 1 저항 (R11) 과, 고전압선 (23) 과 저전압선 (24) 사이에 역시 직렬로 접속된 제 2 저항 (R12), 제 2 노드, 및 n-채널 인핸스먼트형 전계효과 트랜지스터 (Qn11) 를 가지며, 제 1 노드와 제 2 노드는 각각 n-채널 인핸스먼트형 전계효과 트랜지스터의 게이트 전극과 p-채널 인핸스먼트형 전계효과 트랜지스터의 게이트 전극에 접속되어 있고, 전계효과 트랜지스터 중 하나가 고전압선과 저전압선 사이에 인가되는 비정상적 전압에 의하여 소스 노드와 드레인 노드 사이에서 항복되면, 연관된 저항은 통과하는 항복전류에 기인하여 다른 전계효과 트랜지스터 게이트 전극에서의 전위레벨을 변화시키고 보호회로의 전류 방전 능력을 증가시키기 위하여 다른 전계효과 트랜지스터를 턴-온시킨다.
Patent KR-19990062506-A (KR)
Title: 자동차 사고 감시 시스템 및 방법
Filed: 1998-09-23
Abstract: 본 발명은 차량에 탑재되어 운행 중인 차량 주위의 상황을 영상으로 기록하여 자동차 사고가 발생하였을 때 사고의 원인을 명확하게 분석할 수 있도록 한 자동차 사고 감시 시스템 및 방법을 제공함에 그 목적이 있다. 
     전술한 목적을 달성하기 위한 본 발명의 자동차 사고 감시 시스템은 차량의 적소에 설치되어 감시 대상을 촬영하는 다수개의 촬영부로부터 입력되는 아날로그 영상 신호를 다중화하여 하나의 신호로 출력하는 영상 신호 입력부; 상기 영상 신호 입력부로부터 전송받은 상기 다중화된 영상 신호를 디지털 영상 신호로 변환하여 저장하는 영상 신호 기록부; 상기 영상 신호 기록부에 저장되어 있는 상기 디지털 영상 신호를 독출하여 아날로그 영상 신호로 변환하는 영상 신호 독취부; 상기 영상 신호 독취부에서 변환된 상기 다중화된 아날로그 영상 신호를 원래의 독립된 아날로그 영상 신호로 분리하여 외부로 출력시키는 영상 신호 출력부; 상기 차량이 외부 물체와 부딪혔을 때 발생하는 충격을 감지하는 충격 감지부; 및 상기 충격 감지부로부터 입력받은 감지값이 기설정값 이상인 경우에는 상기 영상 신호 기록부를 제어하여 영상 기록 동작을 정지시키거나 영상 신호 독취 명령이 입력되었을 경우에는 상기 영상 신호 독취부를 제어하여 상기 아날로그 영상 신호를 외부로 출력시킬 수 있도록 하는 제어부를 구비하여 이루어진다.
Patent KR-19990007662-A (KR)
Title: 씨엠피용 웨이퍼 홀더 장치
IPC: H01L21/304
Filed: 1998-10-17
Abstract: 본 발명은 반도체 연마 장치의 웨이퍼 홀더에 관한 것으로, 웨이퍼 홀더는 웨이퍼를 부착 그리고 탈착 할 수 있으며, 연마 공정시 웨이퍼 뒷면에 압력(Back pressure)을 인가하여 연마 균일도(Uniformity)를 향상시키기 위한 장치이다.    본 발명의 웨이퍼 홀딩 장치(Substrate holding apparatus)는 회전 전달 축과 원판형 홀딩 헤드(Holding Head)와 백킹 필름(Backing film / Carrier film) 지지 장치와 백킹 필름(Backing film) 그리고 웨이퍼 이탈 방지장치인 리태인 링(Retain ring)으로 구성된다.    백킹 필름(Baking film)은 일 방향 열림(Open)장치 즉, One-way Valve를 부착하여, 공기(Air) 흡입시 흡입 장치가 열려 웨이퍼(Wafer)를 부착할 수 있도록 구성되며, 공기(Air) 주입시 일 방향흡입장치(One-way valve)가 막혀(Close) 탄성체인 백킹 필름(Backing film)이 팽창하여, 웨이퍼 뒷면에서 압력(Back pressure)을 인가하도록 구성된다.    또한 백킹 필름( Backing film)은 백킹 필름(Backing film) 지지 장치와 홀딩 헤드(Holding head) 간 공기 샘(Leak)을 막도록 구성된다.    백킹 필름(Backing film) 지지 장치는 백킹 필름(Backing film)을 지지하고, 홀딩 헤드(Holding head)에 고정되도록 구성되며, 유지 보수가 용이하도록 나선형(Screw type)으로 구성된다.
Patent KR-20000026635-A (KR)
Title: Method for forming isolation insulating layer of semiconductor device
Inventor: PHI SEUNG HO
IPC: H01L21/76
Filed: 1998-10-22
Abstract: PURPOSE: A method for forming an isolation insulating layer of a semiconductor device is provided to form an isolation insulating layer having a stable characteristic by using a selective epitaxial growth and an annealing process. CONSTITUTION: A method for forming an isolation insulating layer of a semiconductor device comprises the steps of: forming a first insulating layer pattern on an isolation area of an upper portion of a silicon substrate(100); forming a first amorphous silicon(13) on a upper portion of a whole surface; forming a second insulating layer on the upper portion of the first amorphous silicon; etching the second insulating layer and the first amorphous silicon; forming a second amorphous silicon(19); etching the second amorphous silicon and the second insulating layer; forming a spacer on a side wall of the first insulating layer pattern by using an anisotropic etching process for the first and the second amorphous silicones; and growing the silicon substrate by a selective epitaxial method, performing a heating process for the silicon substrate, and forming a silicon single crystal on an active area of the silicon substrate.
Patent KR-20000027342-A (KR)
Title: Lamp for refrigerator
Inventor: KIM JONG SEON
IPC: F25D27/00
Filed: 1998-10-28
Abstract: PURPOSE: A lamp for a refrigerator is provided to easily assemble a lamp for a refrigerator as well as to partially isolate the radiant heat of the lamp. CONSTITUTION: A lamp for a refrigerator is assembled by the steps of; painting an aluminum liquid on a glass part(410) of a lamp(400) before combining the lamp to a socket(300); locking a protrusion(402) with a hanging part(310) after inserting the lamp to the mouth of the socket; lighting the lamp by feeding power to an earth unit of the socket if a door is opened; and transferring the radiant heat from the lamp to the lower face of a coating material(500). Therefore, the radiant heat is not transferred to a cover even if the lamp is lighted.
Patent KR-20000031733-A (KR)
Title: Scroll of scroll compressor
Inventor: KIM JIN KYEONG
IPC: F04C18/02
Filed: 1998-11-07
Abstract: PURPOSE: A scroll of a scroll compressor is provided to reduce the rippling generated when venting and to improve the efficiency of the compressor by performing more than two of ventilation every one rotation. CONSTITUTION: A mobile scroll(17) rotates by the rotation of a shaft(12) rotating by the rotation of a pulley delivered with the power of an engine. Coolant is flowed in through an intake hole(23) formed on a housing(11) by the rotation of the mobile scroll, and then flowed into an operation chamber(25) formed between the upper parts of the mobile scroll and a fixed scroll(19). The volume of the operation chamber becomes small by the continuous rotation of the mobile scroll. Accordingly, the coolant is compressed and vented through a discharge hole(22) and the mobile scroll is in the position of an initial state after one rotation is completed. Herein, the volume of the operation chamber is restored to the initial state. Thereby the action of performing the suction stroke is repeated.
Patent KR-19990045537-A (KR)
IPC: A63F13/79
Filed: 1998-11-20
Abstract: A game system utilizes a first game machine and a second game machine. The backup data obtained through playing a first game on the first game machine is memorized in a first game cartridge. The first game cartridge is attached to an extension adapter, and the extension adapter is in turn mounted on a controller for the second game machine. Accordingly, the backup data of the first game machine is taken into the second game machine. The second game machine is attached with a second game cartridge. The second machine executes a second game by processing the backup data according to a second game program set up in the second game cartridge. <IMAGE>
Patent KR-20000038989-A (KR)
Title: Method for controlling electric current in terminal of code division multiple access
Inventor: KIM DAE HYON
IPC: H04B1/40
Filed: 1998-12-10
Abstract: PURPOSE: A method for controlling an electric current in a terminal of a code division multiple access(CDMA) is provided to reduce current consumption in the terminal for a preset period of time, by making a slot cycle index variable according to the time period which is set by a user. CONSTITUTION: A slot cycle index that is currently used is obtained(100), and then it is determined whether a user sets a sleep mode and sleep time for reducing the current consumption(101). If the sleep mode and sleep time are not selected, a sleep mode is performed(104). If the sleep mode and sleep time are selected, a changed slot cycle index is transmitted to a base station(102). It is checked whether a current time corresponds to the sleep time set by a user(103). If the current time corresponds to the sleep time, the sleep mode is also operated(104). When the time for the sleep mode has been expired, the terminal receive the data from the base station(105). The terminal checks whether it can receive the data(106), and compares the current time and the preset time again if it is under a service available state(103).
Patent KR-20000039275-A (KR)
Title: Caller identity display phone and decoding method thereof
Inventor: YU SIN
IPC: H04M1/57
Filed: 1998-12-11
Abstract: PURPOSE: A caller identity display phone and its decoding method are provided to simplify a circuit construction of a phone and reduce a production cost. CONSTITUTION: A phone set(100) includes a band-pass filter(110), an amplifier(120), a comparator(130), a micro controller unit(140) and a liquid crystal display panel. A caller identity signal is converted to a pulse signal. The transition number of the pulse signal and the width of the pulse signal are computed for a certain time. The caller identity signal is converted to a digital data according to the transition number and the pulse width.
Patent KR-20000039783-A (KR)
Title: Apparatus for remotely controlling and monitoring power amplifier in base station of digital-trunked radio system
Inventor: SEON SANG HYOK
IPC: H04Q9/00
Filed: 1998-12-16
Abstract: PURPOSE: An apparatus for remotely controlling and monitoring a power amplifier in a base station of a digital-trunked radio system(D-TRS) is provided to improve the reliability of maintenance of the D-TRS base system, and rapidly response to the error of the power amplifier, by attaching an interfacing part to an environment monitoring device, and interlocking the power amplifier with the device. CONSTITUTION: A power amplifier for outputting state data transmits an environmental state of a base station to a switching center. The digital and analog outputs of the power amplifier are connected respectively to digital and analog input terminals of the device for monitoring an environment of the base station. The digital input terminal comprises a power amplifier(10), an interfacing part(20) and a digital input unit(30). The power amplifier(10) includes transistors(Q1,Q2) and coil(L1). The part(20) includes an inverter(I) for inverting the outputs of the transistors(Q1,Q2). The unit(30) includes a diode(D) turned on when the output of the inverter(I) has a low level, and a photo coupler(PC). The power amplifier(10), part(20) and unit(30) are commonly grounded. A power supply is supplied from the environment monitoring device of the base station to the inverter(I).
Patent KR-20000040220-A (KR)
Title: Coolant channel of rotary compressor
Inventor: LEE BYUNG CHAN
IPC: F04C29/06
Filed: 1998-12-17
Abstract: PURPOSE: A coolant channel of a rotary compressor is provided to minimize noise and prevent the compressor from losing pressure by directly flowing high temperature and pressure coolant to an upper shell from a muffler. CONSTITUTION: A coolant from a cylinder(5) is inlet to a muffler(8) for reducing noise and outlet to the muffler in a low level sound pressure, shrinking and expanding. Then the muffler is in a funnel shape of which a small neck unit(8b) is placed in a boss(6a) of a main bearing(6) so that the space between the neck unit and the boss fills the role of a muffler port(8a). The vented coolant is guided to coolant channels(2a)(3a) formed on a crank shaft(3) or a rotor(2). The channel is in a spiral opposite to the rotor and the crank shaft. The centrifugal force by the rotation of the rotor and the crank shaft and rise force by the coolant, applies to the coolant as climbing power. Thereby the coolant is easy to rise to the upside of a shell(9).
Patent KR-20000040449-A (KR)
Title: Beat line formation of semiconductor device
Inventor: JEONG GU CHEOL
IPC: H01L21/77
Filed: 1998-12-18
Abstract: PURPOSE: A formation of the beat lines in a semiconductor device is obtained by forming the top of a beat line plug to an island form, and forming a beat line surface levelly through mitigating the situations winding at the contacting spot with the beat line. CONSTITUTION: A formation method of the beat lines in a semiconductor device consists of the following processes: a process to form plural word lines on a semiconductor substrate by which the active regions, the field regions, and the beat line contact spots were defined, herein plural word lines were consisted by impurity diffusion regions, capping dielectric layers, gate lines, gate dielectric layers, and gate side wall spacers; a process to form the plural plugs with the dielectric layers so as to be projected in the spaces of the beat line contact spots through filling up the spaces between the word lines; a process to form an inter layer dielectric on the capping dielectric layers and the conducting layers of the spots except the plugs which are projected as high as the height of the projected plugs; and a process to form the distribution wire to be connected with the projected plugs on the inter layers dielectric.
Patent KR-20000041387-A (KR)
Title: Forming method of polymer dielectric layer with very low permittivity
Inventor: KIM SI BYEOM
IPC: H01L21/31
Filed: 1998-12-22
Abstract: PURPOSE: A method for forming a polymer dielectric layer having a very low permittivity as well as a stable property is provided. CONSTITUTION: To form a thin layer with a very low permittivity, the layer is based on a polymer material having a relative dielectric constant of less than 2.0. In addition, the permittivity of the layer is lowered by forming the property of the polymer material into porousness. In a process, a polymer chemical is first spin-coated and forms a thin polymer layer. The polymer chemical is composed of polymer compound and solvent, and the thin polymer layer formed by spin coating has a thickness of 0.4 to 1.0 micrometer. The coated thin polymer layer is then baked in a hot plate to form a porous polymer layer, and annealed in a furnace to improve a stability of the layer. Supercritical drying or freeze drying process is used for baking the polymer layer. The supercritical drying process is performed with a temperature of more than about 230°C and a pressure of more than about 700 psig. Under this condition, the solvent in the polymer layer becomes a supercritical fluid without inducing surface tension. Therefore, the polymer layer has a porous structure while drying without shrinking.
Patent KR-20000041777-A (KR)
Title: Fixing structure of fuel filler neck for vehicle
Inventor: CHOI MIN SEUNG
IPC: B60K15/04
Filed: 1998-12-23
Abstract: PURPOSE: A fixing structure of a fuel filler neck for a vehicle is provided to reduce an assembly time, and to improve productivity by setting up a fuel filler tube assembly through not a bolt but a hook. CONSTITUTION: A fixing structure of a fuel filler neck for a vehicle contains the following processes: to form a couple of elastic hooks (26), suspended in a panel of a body (100), as one body in flange part (24) of a fuel filler neck (12) comprising a fuel filler tube assembly (12); to form a couple of a hook fixing hole (28) penetrated in flange part of the fuel filler neck; to form a couple of elastic hooks (32) as one body in a fuel filler holder (30) corresponding to the hook fixing hole, to fix the fuel filler holder on the fuel filler neck, as a result, to fix the fuel filler tube assembly on the panel.
Patent KR-20000042771-A (KR)
Title: Cellular phone combined with general telephone
Inventor: LEE SANG HA
IPC: H04B7/26
Filed: 1998-12-26
Abstract: PURPOSE: A cellular phone combined with a general telephone is provided to execute a call via a main wire, being compatible with a central office phone in a place to be used the main wire fixedly, and to call by use of cellular phone functions, with moving. CONSTITUTION: A cellular phone combined with a general telephone to use a main wire if connecting to a central office phone, comprises a speaker phone(SPK), a micro phone(MIC), a wireless circuit(112), a key inputter(117), a voice processor(116), a delta tone multi frequency(DTMF) generator(119), an interface unit(118), and a controller(111). The wireless circuit(112) transceives with a base station wirelessly. The key inputter(117) inputs dial signals via a key input. The voice processor(116) supplies the central office phone with a voice speech path in connecting with the central office phone. The DTMF generator(119) converts and generates the dial signals into each corresponded tone frequency. The interface unit(118) has a terminal connected with the DTMF generator(119) and a terminal with the vice processor(116), and connects to the central office phone, to transceive the central office phone and voice signals. The interface unit(118) plays a role of transmitting a dial tone frequency to the central office phone. The controller(111) executes a call by use of the speaker phone and the micro phone in doing an incoming/transmitting call, and converts the dial signals into each dial tone frequency via the key inputter(117), to transmit through the central office phone.