摘要:
An optical repeating system includes an optical transmitter and an optical amplifying repeater. The optical transmitter transmits a supervisory command and a control command to the optical amplifying repeater as a first sub-signal. The supervisory command is a command to supervise internal circuits of the optical amplifying repeater, and the control command is a command to control the optical amplifying repeater. The optical amplifying repeater includes multiple sub-modules each for amplifying and repeating main signals on multiple sets of optical transmission lines. When receiving the supervisory command via the optical transmission line, each sub-module transmits a supervisory signal indicating the supervisory result associated with the supervisory command to an optical receiver as a second sub-signal. In addition, when receiving a predetermined control command via the optical transmission line, each sub-module initializes another sub-module of the multiple sub-modules in response to the predetermined control command. The optical amplifying repeater can restart its control program even when it has fallen into a state where it is difficult to continue to execute the normal operation in accordance with the control program because of some exception or the like.
摘要:
In an optical repeating system including an optical transmitter and optical amplifying repeaters, the optical transmitter specifies one optical amplifying repeater, and transmits to the optical amplifying repeater a supervisory command to supervise internal circuits of the optical amplifying repeater and a control command to control amplification factors of optical amplifiers of the optical amplifying repeater as a first sub-signal. Receiving the supervisory command via an optical transmission line, the optical amplifying repeater transmits a supervisory signal indicating a supervisory result corresponding to the supervisory command to optical receivers via optical transmission lines as a second sub-signal. Receiving the control command via the optical transmission line, the optical amplifying repeater is controlled to change amplification factors of the optical amplifiers in response to the control command.
摘要:
A supervisory system and supervisory method of an optical amplifier repeater are proposed that can implement operation supervision taking account of the characteristics of individual supervisory targets of the optical amplifier repeater, thereby achieving higher reliability. The supervisory system includes an optical transmitter for transmitting an optical signal including an operation command to notify of a state of a supervisory target; an optical amplifier repeater that transmits a response optical signal including a response code obtained by measuring the supervisory target in response to the operation command; an optical receiver for receiving the response optical signal via an optical fiber and an information processing unit for converting the response code into a numerical form by using a predetermined expression that links the response code with measured information obtained by measuring in advance the supervisory target with an external measuring device during operation of the optical amplifier repeater in response to the operation command.
摘要:
An optical repeating system includes an optical transmitter and a plurality of optical amplifying repeaters. The optical transmitter specifies a part or all of the optical amplifying repeaters, and transmits a supervisory command to the specified optical amplifying repeaters as a first sub-signal via an uplink or downlink optical transmission line. The supervisory command is a command to supervise internal circuits of the optical amplifying repeaters. Receiving the supervisory command addressed thereto via the uplink or downlink optical transmission line, the optical amplifying repeaters each transmit a supervisory signal indicating a supervisory result corresponding to the supervisory command to optical receivers via the uplink and downlink optical transmission lines as a second sub-signal. The optical system can reduce the time take to acquire the supervisory information about the plurality of the optical amplifying repeaters.
摘要:
A network device that transfers frames by repeating, in a constant cycle, a reserved transfer interval that is a time band, in which a frame is transferred with a reservation, and a free transfer interval that is a time band, in which a frame is freely transferred, includes: a BPDU generation unit that generates a first BPDU; and a BPDU transmission instruction unit that instructs to arrange the first BPDU in the reserved transfer interval and transmit the first BPDU to a first other network device.
摘要:
A network device that arranges and transfers in an initial period of a cycle a synchronization frame that synchronizes network devices within a network includes: a cycle timer that measures a time within the cycle and a synchronization management unit that suspends frame transmission for a predetermined period till a start of the next cycle in each cycle, on the basis of information from a cycle timer.
摘要:
In each of a plurality of submarine observation apparatus (1 to n), a branching unit (63) branches fixed-wavelength light (λ1) from an incoming wavelength-multiplexed light signal. An observation signal modulating unit (64) modulates the intensity of the branched fixed-wavelength light (λ1) with observation information multiplexed by an observation signal multiplex unit (61). A combiningunit (65) combines lightsignals (λ2) to (λn) passing through the branching unit (63) and the fixed-wavelength light (λ1a) modulated by the observation signal modulating unit (64) into a composite light signal, and outputs it to an optical fiber (12a). Therefore, in each of the plurality of submarine observation apparatus (1 to n), there is no necessity for providing a wavelength-division-multiplexing-transmission optical transmitter which requires high wavelength stability.
摘要:
A toner supply container for supplying toner into a main assembly of an electrophotographic image forming apparatus includes a toner accommodating portion for accommodating toner to be supplied into a main assembly of the electrophotographic image forming apparatus; a toner discharging opening for discharging the toner accommodated in the toner accommodating portion, the toner discharging opening being provided in the toner accommodating portion; a sealing member for openably sealing the toner discharging opening; an openable member for openably sealing the toner discharging opening; a rotatable member which is rotatable relative to the toner accommodating portion; a rotating force receiving portion for receiving rotating force produced by rotation of the rotatable member through a rotating force transmission member provided in the main assembly of the electrophotographic image forming apparatus to unseal the toner discharging opening by the rotation of the rotatable member when the toner supply container is mounted to the main assembly of the electrophotographic image forming apparatus.
摘要:
A laser beam is projected from a laser oscillator 1 and converged by a condenser lens 2. The laser beam converged by the condenser lens 2 is reflected in any arbitrary direction by a scanning mirror 4 which is rotated by scanning means 3. The laser beam is linearly moved. The laser beam is reflected by a curved surface reflecting mirror 5 which is formed in a spherical surface in the primary scanning direction of the laser beam and an ellipsoid in the secondary scanning direction so that the scanned surface is scanned at a substantially predetermined speed.
摘要:
The vapor phase growth method of the group III-V compound semiconductor thin-film, using hydrides and organic metals containing no halogen elements as a raw material for the growth, is disclosed. The method is carried out by alternately introducing group III organic metals raw material gas as well as halides gas and/or halogens gas into a growth chamber, and also by repeating the introducing to grow a thin-film. In accordance with the present invention, it is possible to obtain such high-quality crystal growth as the planarization of hetero junction interface, the improvement of surface morphology or facet, and no deposit of polycrystals on the mask in a wide range.