回線 かいせん終端 しゅうたん装置 そうちでしょう
kaisenshūtansōchideshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of 回線終端装置

1. Probably a terminal device.; Probably a line termination unit.

Polite
Presumptive
Conjecture
Computing