AP-NC608-MD controller is mainly used for networking between PC and controller, but it can also be used separately. The master controller uses 32 ARM multiplex high speed data transfer that can store up to 1 million in/out transactions and staff records. With the utilization of new technologies, the communications between controllers and PCs have improved efficiency and the speed of data transfer. It can be applied to industrial estate, smart residential housing and security control application in small scale estate.