Abstract: An optical connection box includes, a plurality of first optical connectors to which a plurality of first optical paths are respectively connected, a plurality of second optical connectors that respectively include an operation unit protruding from a peripheral edge side position further from a position of the plurality of first optical connectors on a first surface of the optical connection box, and that are respectively connected to a plurality of receptacle optical connectors which are disposed in the plurality of second optical paths, a plurality of relay optical fibers in which any one of the plurality of first optical connectors is disposed in the first terminal and any one of the plurality of second optical connectors is disposed in the second terminal, and a fitting structure with respect to a substrate in which the receptacle optical connectors are disposed.

Abstract: A connection device, capable of visually confirming the connection between a connector pair, including: an optical connector pair that includes a first optical connector and a second optical connector each of which includes a plurality of terminals and corresponding terminals of which are connected to each other by light; a guide light member that guides light to a terminal of one of the first optical connector and the second optical connector; and a visual recognition member that is used to visually recognize the light that passes through from the terminal of the selected optical connector to a terminal of the opposite optical connector.

Abstract: A connection device, capable of visually confirming the connection between a connector pair, including: an optical connector pair that includes a first optical connector and a second optical connector each of which includes a plurality of terminals and corresponding terminals of which are connected to each other by light; a guide light member that guides light to a terminal of one of the first optical connector and the second optical connector; and a visual recognition member that is used to visually recognize the light that passes through from the terminal of the selected optical connector to a terminal of the opposite optical connector.

Abstract: An optical connection box includes, a plurality of first optical connectors to which a plurality of first optical paths are respectively connected, a plurality of second optical connectors that respectively include an operation unit protruding from a peripheral edge side position further from a position of the plurality of first optical connectors on a first surface of the optical connection box, and that are respectively connected to a plurality of receptacle optical connectors which are disposed in the plurality of second optical paths, a plurality of relay optical fibers in which any one of the plurality of first optical connectors is disposed in the first terminal and any one of the plurality of second optical connectors is disposed in the second terminal, and a fitting structure with respect to a substrate in which the receptacle optical connectors are disposed.

Abstract: A board unit includes a board that has a through hole penetrating the board from a first side of the board to a second side of the board and having a conductive inner wall surface a first electronic component that has a first connection pin to be press-fitted in the through hole from the first side of the board, and a conductive member that is disposed in the through hole to connect the inner wall surface of the through hole to the first connection pin.

Abstract: To cool a blade type server disposed in an air-conditioned room, the following arrangements are made. The first is at least one shell having a ventilation passage disposed in the air-conditioned room. The second is, the following are disposed in a ventilation passage: racks, in which blade type servers each composed of a case with slim boards housed therein are stacked; cooling coils each having a coolant passage and a cooling fin and cooling a passing air; and at least one fan unit having axial-flow fans placed therein and producing air currents in one direction. The third is the fan unit forces a cooling air to flow in one direction in the ventilation passage thereby to cool the servers in the racks. The cooling coils and racks are disposed alternately so that warmed cooling air after passing through the rack is cooled by the cooling coil and then cools the next rack.

Abstract: A board unit includes a board that has a through hole penetrating the board from a first side of the board to a second side of the board and having a conductive inner wall surface a first electronic component that has a first connection pin to be press-fitted in the through hole from the first side of the board, and a conductive member that is disposed in the through hole to connect the inner wall surface of the through hole to the first connection pin.

Abstract: To cool a blade type server disposed in an air-conditioned room, the following arrangements are made. The first is at least one shell having a ventilation passage disposed in the air-conditioned room. The second is, the following are disposed in a ventilation passage: racks, in which blade type servers earch composed of a case with slim boards housed therein are stacked; cooling coils each having a coolant passage and a cooling fin and cooling a passing air; and at least one fan unit having axial-flow fans placed therein and producing air curents in one direction. The third is the fan unit forces a cooling air to flow in one direction in the ventilation passage thereby to cool the servers in the racks. The cooling coils and racks are dispossed alternately so that warmed cooling air after passing through the rack is cooled by the cooling coil and then cools the next rack.

Abstract: To cool a blade type server disposed in an air-conditioned room, the following arrangements are made. The first is at least one shell having a ventilation passage disposed in the air-conditioned room. The second is, the following are disposed in a ventilation passage: racks, in which blade type servers each composed of a case with slim boards housed therein are stacked; cooling coils each having a coolant passage and a cooling fin and cooling a passing air; and at least one fan unit having axial-flow fans placed therein and producing air currents in one direction. The third is the fan unit forces a cooling air to flow in one direction in the ventilation passage thereby to cool the servers in the racks. The cooling coils and racks are disposed alternately so that warmed cooling air after passing through the rack is cooled by the cooling coil and then cools the next rack.

Abstract: A thermal capacitor cools servers when an active cooling system fails. The thermal capacitor includes cold insulation passages, fans, temperature sensors, and a control unit. The cold insulation passages each have a plurality of air flow channels obtained by dividing the air flow path into a plurality of air flow paths with different air flow path cross-sectional areas. The fan is mounted in each air flow path and the fan controls the air flow of each air flow channel. A temperature sensor is mounted in each outlet of the cold insulation passages. When a detected temperature exceeds a predetermined temperature, the control unit controls air flow so that the ratio of air flow by air flow passage with larger air flow path diameter to overall air flow of all air flow channel increases.

Abstract: In a blade of a blade server, power is supplied from a power distributing unit to an internal circuit, and also supplied to a capacitor to charge the capacitor. If power consumption of the blade server is high and a process load on a blade is also high, power is supplied to the internal circuit from both the power distributing unit and the capacitor. If the process load on the blade is low, power is supplied to the internal circuit only from the power distributing unit.

Abstract: An interconnection network is provided with switch devices for computers for a plurality of computers, respectively, a predetermined number of physical lines for switch devices for computers are bound to form each of logical lines, the physical lines forming the logical lines interconnect the other switch devices for computer via a plurality of switch devices for relay to form a parallel computer system. When a data transmission speed required between the computers is judged to be lower than a line transmission speed determined by the number of physical lines of any switch device for relay, switch setting-off unit turns off power of the whole switch device for relay that has been judged to shut off the switch device for relay from the interconnection network.

Abstract: A server system includes a control device and plurality of server devices. The control device calculates an actual power consumption of the server system and notifies the actual power consumption to the server devices. Each server device compares the actual power consumption with a threshold value, and restricts power consumption of the server device based on a power-saving policy for the server device that represents a lower limit of power usable by the server device when the actual power consumption is greater than or equal to the threshold value.

Abstract: A network management apparatus interconnects a plurality of computers through physical lines having a predetermined line speed to manage a switch apparatus constructing a parallel computer system. The switch apparatus comprises a plurality of physical port units to enable or disable the same through individual power supply ON/OFF control for the physical port units, thereby changing and controlling the line transmission speed according to the enable number. A logical port constructing unit in the network management apparatus bundles the physical lines by a plurality of physical port units in the switch apparatus to construct logical lines. A port control unit changes the number of operations of a plurality of physical port units assigned to the logical port units through the power supply ON/OFF control according to a necessary data transmission speed for the logical port units, thereby dynamically changing the line transmission speed.

Abstract: A thermal capacitor cools servers when an active cooling system fails. The thermal capacitor includes cold insulation passages, fans, temperature sensors, and a control unit. The cold insulation passages each have a plurality of air flow channels obtained by dividing the air flow path into a plurality of air flow paths with different air flow path cross-sectional areas. The fan is mounted in each air flow path and the fan controls the air flow of each air flow channel. A temperature sensor is mounted in each outlet of the cold insulation passages. When a detected temperature exceeds a predetermined temperature, the control unit controls air flow so that the ratio of air flow by air flow passage with larger air flow path diameter to overall air flow of all air flow channel increases.

Abstract: An electronic device that includes a part prone to aged deterioration includes an environmental load applying unit that applies a higher environmental load on the part than an environmental load in a normal operation, an error detecting unit that detects an error in the part with the higher environmental load applied, and a failure predicting unit that predicts a failure of the part based on the error detected.

Abstract: In multi-connections, a message writing apparatus is provided. This message writing apparatus (21) comprises a path recognizing section (21a), a received message assembling section (21b), a receive control section (21c), an arbitrating section (21d) and an external memory control section (21e). When a received ATM cell is written/readout in/from a receiving buffer, it is written/read out in a memory area corresponding to each path, which enables the processing of AAL5 messages from a plurality of paths and improves the transfer processing capability, thereby leading to realizing a shortening of the data transfer time.

Abstract: To cool a blade type server disposed in an air-conditioned room, the following arrangements are made. The first is at least one shell having a ventilation passage disposed in the air-conditioned room. The second is, the following are disposed in a ventilation passage: racks, in which blade type servers each composed of a case with slim boards housed therein are stacked; cooling coils each having a coolant passage and a cooling fin and cooling a passing air; and at least one fan unit having axial-flow fans placed therein and producing air currents in one direction. The third is the fan unit forces a cooling air to flow in one direction in the ventilation passage thereby to cool the servers in the racks. The cooling coils and racks are disposed alternately so that warmed cooling air after passing through the rack is cooled by the cooling coil and then cools the next rack.

Abstract: An interconnection network is provided with switch devices for computers for a plurality of computers, respectively, a predetermined number of physical lines for switch devices for computers are bound to form each of logical lines, the physical lines forming the logical lines interconnect the other switch devices for computer via a plurality of switch devices for relay to form a parallel computer system. When a data transmission speed required between the computers is judged to be lower than a line transmission speed determined by the number of physical lines of any switch device for relay, switch setting-off unit turns off power of the whole switch device for relay that has been judged to shut off the switch device for relay from the interconnection network.

Abstract: A network management apparatus interconnects a plurality of computers through physical lines having a predetermined line speed to manage a switch apparatus constructing a parallel computer system. The switch apparatus comprises a plurality of physical port units to enable or disable the same through individual power supply ON/OFF control for the physical port units, thereby changing and controlling the line transmission speed according to the enable number. A logical port constructing unit in the network management apparatus bundles the physical lines by a plurality of physical port units in the switch apparatus to construct logical lines. A port control unit changes the number of operations of a plurality of physical port units assigned to the logical port units through the power supply ON/OFF control according to a necessary data transmission speed for the logical port units, thereby dynamically changing the line transmission speed.