DoorKing 1810 Telephone Entry Access Control System with Directory Provides service for up to 1000 residents. Led lighting illuminates keypad and directory Built-in display indicates door/gate has been opened Dtmf tone output allows these systems to be used with PBX, KSU and telephone systems with auto-attendants With its built-in lighted directory, the DKS Model 1810 is a complete self-contained telephone entry system that is ideal for small to medium sized apartment buildings, gated communities, condominiums, office buildings, factories and industrial sites. Managers can easily create and change the directory as needed with a word processing program (templates are available from DoorKing). The DKS 1810 is available in both surface and flush mount styles. Visitors are identified by voice communication via the telephone. Access is granted by pressing "9" on your touch tone telephone, or access can be denied by simply hanging up.