Thank you for the good suggestions. At the prompting of StewartM I removed the camera from the house, retested the cable (tested good), and set the camera up inside the house using the short cable provided by HIkvision to hook directly to the adjacent switch. This would eliminate any potential issues associated with the ethernet cable, dampness, poor connection, etc. I still getting local abnormal shutdowns followed by a power on at least once per day. There are three other cameras connected to the POE switch, none of which experience this behavior. One of the three is the exact same model PTZ. Based upon the March 12th comments from Iewic, I am thinking that I could try to remove those three cameras and only run one camera out of the POE switch. At this point I think we can say the issue must be either the camera or the switch. We have removed everything else from equation.