AC-225 is suitable for applications with up to 30000 users across a modular 4092 doors, allowing maximum flexibility for securing a growing enterprise. Each AC-225 Access Control Unit (ACU) supports two readers (In/Out) of various formats including standard Wiegand 26-bit. Installations can also have one reader per door. The AC-225 is ready for installation with a mountable & lockable metal enclosure integrated with transformer, power supply/charger, sounder and control board. Using RS-232, Ethernet TCP/IP, or PSTN communication the AC-225 supports multiple local or remote site door sub-networks that can connect to the AS-525 AxTrax™ Client/Server PC software running on Microsoft® Windows® 98/ME & NT/2000/XP/Vista/7 operating systems.