回線が使用中
Kana: かいせんがしようちゅう
line is busy
What 回線が使用中 means
回線が使用中 (かいせんがしようちゅう) is a Japanese word meaning “line is busy”. It belongs to the Grammar & Phrases topic and appears at Level 4, so it is one of the words worth learning early when you study Japanese.