| 摘要 |
PROBLEM TO BE SOLVED: To connect multiple terminals without a cable and to enable wide-area communication. SOLUTION: Hollow bodies (18) and (20) made of metal, etc., are provided with multiple interface fitting parts (24) for fitting a terminal (32) such as a server and a radio wave transmission line (26) which is closed to external electromagnetic waves. At each interface fitting part (24), a radio wave-electric signal mutual converting element (48) and a means for discriminating frame data received by this converting means (48) are arranged to send and receive frame data to and from the terminal (32) fitted to the interface fitting part (24) by using radio waves.
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