The “Domofon Service” Company installs on-door speakerphones (for apartment buildings) produced by the Russian Company “VIZIT”, and replaces entrance doors. System Advantages: New double-walled, heat-insulated, metal entrance door with automatic locks and polymeric coating;  Electromagnet locks (load- up to 400 kg);  Two-way communication with each apartment;  Break-in proof.     Entrance doors can be opened by: a) the electronic-code key; b) using the speakerphones installe...