Features:
* Supports 4 readers (two for entry, two for exit) and two exit buttons; 20,000 user and 100,000 event buffers.
* Functions: door access control, time attendance, on-line patrol, anti-pass back and anti-tail, fire alarming
* With the video server, it can integrate with surveillance; with the expansion I/O board, it can linkage with alarm system, detector system, burglary system