THE SMART TRICK OF ติดตั้ง ระบบ ACCESS CONTROL THAT NOBODY IS DISCUSSING

Some designs of sub-controllers (normally lessen cost) don't have the memory or processing electric power to help make access decisions independently. If the key controller fails, sub-controllers modify to degraded mode through which doorways are both fully locked or unlocked, and no gatherings are recorded. Such sub-controllers ought to be avoided