The 1812 Access Plus is a versatile PC Programmable Telephone Entry System that provides voice communication for up to 27 residents from the main entry point to the resident via the phone network. Up ...

DoorKing's 1837 90 Series telephone entry and access control system stores up to 3,000 phone numbers and 8,000 device codes and can be expanded to control up to 48 wired access points with optional ...