noun
line switching
Technical term in computing and telecommunications for switching between communication lines or circuits.
障害発生時に自動で回線切り換えが行われる。
Line switching is performed automatically when a failure occurs.
このルーターは回線切り換え機能を備えている。
This router has a line switching function.
回線交換 refers to circuit switching as a communication method, while 回線切り換え is the action of switching between lines.
Compound of 回線 (line, circuit) and 切り換え (switching, changeover).