Origin of intercom
Examples from the Web for intercom
We would be outside the outer glass box and talk to him via an intercom system.
I was sitting in a 6th grade classroom when the principal came on the intercom to say the president had been shot.The JFK Assassination: The Long Weekend That Never Ended|Malcolm Jones|November 1, 2013|DAILY BEAST
The school had an intercom system aimed at stopping unauthorized entry--and he did it anyway.There's Little We Can Do to Prevent Another Massacre|Megan McArdle|December 17, 2012|DAILY BEAST
“This one is for you, Salman,” George boomed over the intercom.
When the scientist finally left, Vidac turned to the ship's intercom and paged the cadets.
Flipping an intercom switch, his voice snapped out cold in the still room.Infinite Intruder|Alan Edward Nourse
Nor could Logan switch to "intercom only," since a sudden radio silence would create anxiety below.Tight Squeeze|Dean Charles Ing
Nicholas Shinny sat on the power deck and listened to Loring issue orders over the intercom.Danger in Deep Space|Carey Rockwell
Roger's voice blasted through the intercom from the radar deck.