interphone

[ in-ter-fohn ]

/ ˈɪn tərˌfoʊn /

an intercommunication system using telephones to connect offices, stations, etc., as in a building or ship; intercom.

a telephone used in such a system.

Origin of interphone

First recorded in 1940–45; formerly trademark

That was the Interphone study, which happened to have been organized by the IARC.

Are Cellphones Really a Cancer Risk? |Sharon Begley |June 1, 2011 |DAILY BEAST
The Red Dog interphone system might or might not be on the same band they used.

First on the Moon |Jeff Sutton
He checked his interphone to make sure it was working and called again.

First on the Moon |Jeff Sutton
Marlowe slapped his interphone switch as soon as the alien was gone.

Citadel |Algirdas Jonas Budrys

A bulb flickered on his interphone set, and Marlowe shot a glance at the switch beneath it.

Citadel |Algirdas Jonas Budrys
She spoke on the interphone, still in the sweetly sympathetic tone she had adopted for her greetings that morning.

The Great Gray Plague |Raymond F. Jones

interphone

/ (ˈɪntəˌfəʊn) /

a telephone system for linking different rooms within a building, ship, etc