The SALTO CU50ENSVN is an online door controller that can have 1 or 2 wall readers connected, has 2 control relay outputs and has SALTO Virtual Network (SVN) capabilities. Cards are automatically updated with the latest changes in the access plan, it records the user audit into the PC and provides advanced information on battery status. It also continually updates the cancelled ID carrier black list simply by using the cards on the network, distributing the latest access information throughout the building via the offline stand-alone locks. Access control changes can be carried out on the SALTO software and these are then actioned at the control units in real-time. It provides full online features via the networked live link such as door monitoring status, remotely controlling door opening and Roll Call.