Comprehensive Tutorial about Access Control System
Posted: Sat Mar 19, 2011 6:49 am
Model: UD7001,UD7002,UD7004,UD7001N,UD7002N,UD7004N
A very good tutorial about access control worth reading.
http://en.wikipedia.org/wiki/Access_control
A very good tutorial about access control worth reading.
http://en.wikipedia.org/wiki/Access_control