Disable keys when event memory becomes full

Generation 1 CyberKeys can hold up to 3900 events in memory. Generation 2 CyberKeys can hold 12000. New CyberKeys from the factory overwrite the oldest events and continue functioning when their memory limit is reached. If this option is selected, keys within this subsystem will not overwrite the oldest events. Instead they will no longer open CyberLocks until the key has been downloaded at a communicator and its audit events have been captured by CyberAudit-Web.