noun
dedicated line; exclusive line
Used in telecommunications and networking for a line reserved for a specific user or purpose, not shared with others.
本社と支社の間には専用線が引かれている。
A dedicated line is installed between the head office and the branch office.
専用線を使
Using a dedicated line stabilizes the communication speed.
専用 means 'exclusive use' and is used in many compounds; 専用線 is one such compound referring to a dedicated line.
Compound of 専用 (sen'yō, 'exclusive use') + 線 (sen, 'line').