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No directory, keypad programmable, standard memory capacity of 50, non-expandable.
The model 1812 is a unique telephone intercom system that allows homeowners to use their telephone as an intercom to speak to a guest at a front door or gate. With its intercom mode programming feature, the 1812 connects directly to the resident phone line and does not require a dedicated Central Office (C.O.) phone line to operate. Visitors are easily identified by voice communication and can be granted or denied access directly from a touch-tone telephone. Features include full-duplex communication, distinctive double-ring call waiting, call forwarding, 3 preprogrammed call out phone numbers, do-not-disturb time zone, 4 hold-open time zones, built-in clock provides automatic relay activation, time clock has its own backup power source, 50 4-digit entry codes, flash entry code, 2 relays for door/gate control, EEPROM memory, auto-programming PC software included, and a power transformer are included. Warranty: 2 years.