Memory Chip for 1800 series DoorKing Telephone Entry Systems:
The 1834 Telephone Entry System, 1835 Telephone Entry System, and 1837 Telephone Entry System come equipped with 3000 capacity memory; however, smaller memory chips are available for these models to be compatible with older systems.
The 1833 Telephone Entry System requires all memory chips to be bought separately.
Entry systems sold separately.
Please choose the correct memory chip for your application in the drop down menu.