Provides Voice Communication Between Your Telephone System And The Doorphone Speaker
Controls Remote Door Unlocking (with Optional Customersupplied And Customerinstalled Electromechanical Strikeplate)
Has Door Ajar/detect Notification Capability When Used With A Customersupplied And Customerinstalled Door Switch
Interfaces The Doorphone Speaker And Has Extra Alert Contact Closure
Volume Control For Speaker And Talkback May Be Used With C.o. Ports C.o. Lines Or C.o. Station Ports Includes Port Saver Features And Has Ability To Dial Up To 16 Digit Telephone Number