Description
The DoorKing 1830-404 is a 3,000-entry memory module (Anti-Pass Back / APB) designed for DoorKing 1830 series telephone entry and access control systems. It serves as the direct, upgraded replacement for older, obsolete legacy chips like the 1830-401, 1830-402, 1830-403, and 1837-147.
Features
- Works seamlessly with DoorKing models 1833, 1834, 1835, 1837, and 1838
- Supports up to 3,000 user codes or entries
- Has an onboard LED labeled "ACT" that flashes when the system processor accesses the memory module
