The model 1838 multi-door access controller is ideal for small businesses, office buildings, factories, industrial sites, apartment complexes, or for any application that requires access control and reporting capabilities. The 1838 is a 2-door controller that easily expands to control up to 16 doors. This flexible system allows you to control access by means of encoded cards, 5-digit PINs (Personal Identification Number), wireless RF control, or with almost any 26-bit weigand devices. Additionally, our elevator control module restricts which floors system users have access to, making it an ideal system for high rise buildings. For additional security, the 1838 allows you to monitor activity as it happens on your computer display and with our anti-pass back memory, you can enable a TRUE anti-pass back system in one of three different configurations; passive, active and trap.