IEE20DN model camera can not maintain focus on a scene.
Firmware Version 1.8.2 is causing a conflict with the ability of a camera to remain focused.
It is recommended to update the camera to Firmware Version 188.8.131.52 or greater, Unless they are using an Endura VMS system.
Firmware can be found Here.
Please contact technical support at 1-800-289-9100 if requiring update firmware of Sarix with an Endura system.