(n) :
An intercom system fitted at the entrance to a building, especially a block of flats, by which visitors can identify themselves to specific occupants before being admitted to the building.
(n) :
An intercom telephone for conversing across a gated entrance.
(n) :
An intercom system fitted at the entrance to a building, especially a block of flats, by which visitors can identify themselves to specific occupants before being admitted to the building.
(n) :
An intercom telephone for conversing across a gated entrance.