From Longman Dictionary of Contemporary EnglishEntryphoneEn‧try‧phone /ˈentrifəʊn $ -foʊn/ noun [countable] TCT trademark a type of telephone outside a building that allows visitors to ask someone inside to open the door
Examples from the Corpus
Entryphone• Who was the burglar breaking in through an entryphone?• Luckily for him, Amelia's bodybuilding freak had been handling the entryphone and was there to pull her off him.• Her reverie was rudely interrupted by the buzz of the entryphone.• On Saturday afternoon he didn't bother with the entryphone. 