noun
line concentrator; line multiplexer
A networking device that aggregates multiple communication lines into a single line. Used in computing and telecommunications contexts.
集線装置を使って、複数の電話回線を一本にまとめる。
Use a line concentrator to combine multiple telephone lines into one.
Compound of 集 (collect) + 線 (line) + 装置 (device). The term is a direct technical translation of 'line concentrator'.