Opportunity knocks, but usually the door is locked

Rather Interesting, it is a very nicely designed central locking system for server cabinets.  The TZ Praetorian uses an end of row control pad and standard access control device (badge reader, biometric station etc) and ties into your existing access control system.  All of the lock controls are low current (unlike magnetic locks) and are designed to run over standard UTP cabling.  Door open/close indication is built in and displayed on the end of the row, so unsecured cabinets can be caught quickly.

Watch the video... 

http://anixter.com/praetorian