Wiktionary
n. An intercom system which enables someone, without opening the door, to converse with the person who has rung the doorbell.
Usage examples of "entryphone".
When he got there he pressed the button on the entryphone, waiting for the crackle of her distorted voice, but there was nothing.
She came to the window when he pressed the button on the entryphone, poking her head out of the lower half of the opened sash window, through dark brown curtains.
This time Sara was visible, moving about in the room she usually greeted Graham from when he pressed the entryphone buzzer.
He could just imagine someone from the houses on the corner of Maygood Street watching him now, looking at his back as he stood at the entryphone grille, waiting and waiting.
He stared at the door for a moment, then at the entryphone, then at the still buzzing door.