Door or pool gate access control keeps unauthorized personnel from restricted areas.  Swipe proximity cards, key fobs, and codes are a few ways authorised people may be allowed access which may be restricted by time of day or specific days of the week.  A history of the transactions showing which card or code accessed the property and when is available through reports viewed remotely.  When coupled with a camera system you will be able to see whose code or card was used and the person attempting entry.  Violators can easily be restricted or banned from access remotely by removing their card or code from the system.