interphone

名词 interphone:

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

in.ter.phone

n.（名词）
A telephone used in a small closed system of telephones:
闭路电话：使用小型闭路系统的电话：
例句：
.The sergeant lifted the interphone and told the pilot that the door was properly sealed.(Tom Clancy)
.士官拿起闭路电话告诉驾驶员门已经关紧了.(汤姆·克兰西)