| 摘要 |
A network system is provided with plural branch lines for respectively linking with nodes, each of the branch lines including a transmission line and a reception line; a branching point linked with the reception lines, the branching point including and being linked with a switching device for selectively establishing contact with one selected from the transmission lines and separating the others of the transmission lines, wherein the transmission lines are so regulated as to have characteristic impedances respectively matching with a total of characteristic impedances of the reception lines and a trunk line for linking the branching point with an external branching point.
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