It's easy expanding to large scale system. We deployed a lot such system all over the world to control more than 50 doors, even 200 doors.
Multiple control panels( we have 1/2/4 door control panel) can be networked to the same network environment and managed by only one central software/database, check below picture:
One software manager all doors. And for all enrolled users, just easily distribute to new control panels, no need enroll/input user infor again.
