Abstract: An OLT includes a storage unit that stores management information indicating that a first address has been assigned to a client device that connects to an ONU as an operational system and an ONU as a standby system, a detection unit that detects occurrence of a failure to the ONU, a communication control unit that, connects to the ONU when the occurrence of the failure to the first slave station device is detected and controls communication performed by the client device so that the client device connects to the Internet via the ONU and the OLT, and a monitoring unit that monitors unauthorized use of the first address based on the management information both when the client device connects to the Internet via the ONU and the OLT and when the client device connects to the Internet via the ONU and the OLT.

Abstract: An excitation light source device includes: an excitation light source to generate the Raman excitation light; a light source controller to control an intensity of the Raman excitation light; an amplified spontaneous emission noise measurer to measure an intensity of amplified spontaneous emission noise caused by the Raman excitation light; and a transmission line abnormality analyzer to detect abnormality in the transmission line on a basis of a control state of the light source controller and a measurement result of the amplified spontaneous emission noise measurer. In a state where the abnormality is not detected, the light source controller controls the intensity of the Raman excitation light to gradually increase to a set value. In a state where the abnormality is detected, the light source controller controls the excitation light source to stop or reduce generation of the Raman excitation light.

Abstract: An excitation light source device includes: an excitation light source to generate the Raman excitation light; a light source controller to control an intensity of the Raman excitation light; an amplified spontaneous emission noise measurer to measure an intensity of amplified spontaneous emission noise caused by the Raman excitation light; and a transmission line abnormality analyzer to detect abnormality in the transmission line on a basis of a control state of the light source controller and a measurement result of the amplified spontaneous emission noise measurer. In a state where the abnormality is not detected, the light source controller controls the intensity of the Raman excitation light to gradually increase to a set value. In a state where the abnormality is detected, the light source controller controls the excitation light source to stop or reduce generation of the Raman excitation light.

Abstract: Node equipment 1, having optical attenuator unit 21 for optically attenuating wavelength division multiplexing signals received and optical multiplexer/demultiplexer unit 5 for performing optical multiplexing/demultiplexing of the wavelength division multiplexing signals received from the optical attenuator unit 21 via an optical cord 11, includes: output level detecting unit 24 for detecting the optical power level of the wavelength division multiplexing signals at a pre-stage of the optical cord 11; input level detecting unit 52 for detecting the optical power level of the wavelength division multiplexing signals at a post-stage of the optical cord 11; deciding unit 25 for deciding abnormality of the optical power level loss through the optical cord 11 from the optical power levels detected by the output level detecting unit 24 and input level detecting unit 52; and control unit 26 for controlling the optical attenuation of the optical attenuator unit 21 according to the abnormality decision result by the d

Abstract: Node equipment 1, having optical attenuator unit 21 for optically attenuating wavelength division multiplexing signals received and optical multiplexer/demultiplexer unit 5 for performing optical multiplexing/demultiplexing of the wavelength division multiplexing signals received from the optical attenuator unit 21 via an optical cord 11, includes: output level detecting unit 24 for detecting the optical power level of the wavelength division multiplexing signals at a pre-stage of the optical cord 11; input level detecting unit 52 for detecting the optical power level of the wavelength division multiplexing signals at a post-stage of the optical cord 11; deciding unit 25 for deciding abnormality of the optical power level loss through the optical cord 11 from the optical power levels detected by the output level detecting unit 24 and input level detecting unit 52; and control unit 26 for controlling the optical attenuation of the optical attenuator unit 21 according to the abnormality decision result by the d

Abstract: A disclosed image forming apparatus includes an apparatus main body; a page-width inkjet head unit capable of ejecting fluid droplets without substantially moving the page-width inkjet head unit while forming an image on a medium to be recorded on; a maintaining and recovering unit maintaining and recovering a function of a nozzle of the page-width inkjet head unit; and an engaging unit for engaging the page-width inkjet head unit and the maintaining and recovering unit together as a single unit when the page-width inkjet head unit and the maintaining and recovering unit are removed from the apparatus main body as a single unit.

Abstract: An inkjet recording apparatus provides an improved printing speed and improved convenience of use. A recording head discharges droplets of a recording liquid onto a paper so as to form an image on the paper. A belt conveyance mechanism has a belt onto which the paper is electrostatically attached. The paper attached onto the belt is conveyed in a direction perpendicular to a carding direction of the paper.

Abstract: An inkjet recording apparatus provides an improved printing speed and improved convenience of use. A recording head discharges droplets of a recording liquid onto a paper so as to form an image on the paper. A belt conveyance mechanism has a belt onto which the paper is electrostatically attached. The paper attached onto the belt is conveyed in a direction perpendicular to a carding direction of the paper.

Abstract: A liquid distribution unit for use between a container of a liquid and an apparatus supplied with said liquid, said liquid distribution unit includes a hollow body, a single inlet port provided in the hollow body for connection to the container, the hollow body being supplied with the liquid from the container via the single inlet port, and two or more outlet ports provided in the hollow body for feeding the liquid out from the hollow body.

Abstract: A disclosed image forming apparatus includes an apparatus main body; a page-width inkjet head unit capable of ejecting fluid droplets without substantially moving the page-width inkjet head unit while forming an image on a medium to be recorded on; a maintaining and recovering unit maintaining and recovering a function of a nozzle of the page-width inkjet head unit; and an engaging unit for engaging the page-width inkjet head unit and the maintaining and recovering unit together as a single unit when the page-width inkjet head unit and the maintaining and recovering unit are removed from the apparatus main body as a single unit.

Abstract: A liquid distribution unit for use between a container of a liquid and an apparatus supplied with said liquid, said liquid distribution unit includes a hollow body, a single inlet port provided in the hollow body for connection to the container, the hollow body being supplied with the liquid from the container via the single inlet port, and two or more outlet ports provided in the hollow body for feeding the liquid out from the hollow body.

Abstract: A paper feeding device comprises a document tray for loading the document, a document-detecting sensor for detecting the document loaded in the document tray and a MYLAR® made of a sheet-shaped resilience material. A part of the MYLAR® is in contact with the document carrying surface at the upstream side of the detecting position of the document-detecting sensor The document is pushed towards the detecting position during the MYLAR® pushing the upper surface of the document. The MYLAR® is bent to form a loop. The lower guide plate is arranged to be in contact with a part of the loop When the document is not detected, the filler of the document-detecting sensor and the MYLAR® overlap each other. A long hole is set in the loop of the MYLAR®.

Abstract: An inkjet recording apparatus provides an improved printing speed and improved convenience of use. A recording head discharges droplets of a recording liquid onto a paper so as to form an image on the paper. A belt conveyance mechanism has a belt onto which the paper is electrostatically attached. The paper attached onto the belt is conveyed in a direction perpendicular to a carding direction of the paper.

Abstract: A paper feeding device comprises a document tray for loading the document, a document-detecting sensor for detecting the document loaded in the document tray and a MYLAR® made of a sheet-shaped resilience material. A part of the MYLAR® is in contact with the document carrying surface at the upstream side of the detecting position of the document-detecting sensor The document is pushed towards the detecting position during the MYLAR® pushing the upper surface of the document. The MYLAR® is bent to form a loop. The lower guide plate is arranged to be in contact with a part of the loop When the document is not detected, the filler of the document-detecting sensor and the MYLAR® overlap each other. A long hole is set in the loop of the MYLAR®.

Abstract: A sheet guide in an image reading apparatus guides a sheet fed from a pair of rollers to a scanning point on a contact glass includes a pair of notched portions for bearing forces applied by at least one of the rollers, a sheet bearing portion for guiding the sheet fed by the rollers, wherein the image bearing portion guides the sheet fed out from the rollers to lower an angle incidence which the sheet forms with the contact glass. The sheet bearing edge is positioned toward a lower position of a nip between the rollers and changes the angle of incidence to become closer to horizontal with respect to the contact glass, than if the sheet were unguided.