名詞 interphone:

1. a telephonic intercommunication system linking different rooms in a building or ship etc

in.ter.phone

n.（名詞）
A telephone used in a small closed system of telephones:
閉路電話：使用小型閉路系統(tǒng)的電話：
例句：
.The sergeant lifted the interphone and told the pilot that the door was properly sealed.(Tom Clancy)
.士官拿起閉路電話告訴駕駛員門已經關緊了.(湯姆·克蘭西)