Abstract: A communication system housing a plurality of terminals capable of processing one or more media is provided with an available terminal information storage section for storing a terminal or terminals to be used for each user, an available media information storage section for storing a medium or media or a media realization scheme or schemes to be used for each terminal, a determination section for determining a combination of one or more media or one or more media realization schemes and a terminal combination of one or more terminals to be used by each user in accordance with the contents of the available terminal information storage section and the available media information storage section for each of users engaged in communications according to communication requests and a control section for controlling setting of call/connections based on the media combination and the terminal combination determined by the determination section.

Abstract: A switching apparatus includes an input port to which information data associated with an ATM cell is input, a memory for storing information data input via the input port, a processor for sequentially performing frame synchronization process for finding a frame and ATM cell synchronization process for checking a cell structure with respect to information data read out from the memory, and an output port for outputting information data processed by the processor.

Abstract: A gas blowing nozzle is produced by molding a non-porous substance into a molding frame under pressure and at the same time positioning a plurality of gas passageways forming members at predetermined spaces and distances from each other. The passageway holes have cross sectional shapes as desired, so that the gas blowing may be accurately controlled to perform refining of molten metal.