4 ms·
I briefly worked on access control a long time ago - aren’t they supposed to cache credentials locally so that individual doors still function autonomously duri
by implements 5y ago
I briefly worked on access control a long time ago - aren’t they supposed to cache credentials locally so that individual doors still function autonomously during a fire / loss of power and comms?
- colechristensen 5y agoEh I would assume that would only be necessary if the lock mechanism kept people in, the only place I’ve been that did that was a defense contractor, and even then there were alarmed emergency doors. Everywhere else had either no exit control or trivially bypassed exit control.
- implements 5y agoWasn’t defence, but somewhere with highly competitive commercially sensitive engineered components. You needed a card to open a door in either direction, but exit routes all had “Break to Exit” bypass switches - which lazy engineers often did, particularly if the door wasn’t covered by CCTV. My curiously downvoted point was, I’m surprised an internet problem would stop an high security access control system from functioning - they’re supposed to be designed to cope with that and continue to work autonomously in emergencies.