Concierge Switchboard/Security Guard Station. Provides CallUp and Annunciated Call Down from all the apartment stations. Also has integral video screen for viewing video calls fron entry panels in the system.Incoming calls are announced with a ring and the callers name on the display. The 945F includes an searchable alphanumeric directory. An event buffer stores all system events. Up to 4 40501 switchboards can be used in a single system. The apartment staions can selectively call to all 4 locations. Power by 6923 Supply.