door intercom; intercom
A door intercom system, typically with a camera and speaker, used in apartments and houses. Wasei-eigo from 'door phone'.
wasei-eigo (Japanese-coined English), from door phone
The apartment's door intercom was broken, so I didn't know when visitors came.
I confirmed through the door intercom that the delivery person had arrived.
Wasei-eigo from English 'door phone'. The term is not used in English; the standard English equivalent is 'door intercom' or 'video doorbell'.