We're running NEC SV9100 (WebPro 10.00.00) and have stable NEC DT900 phones on Firmware Version (02.04.00.00) that have been online for over a year without interruption. Recently, we've provisioned more DT900 phones on Firmware Version (03.00.02.00), but occasionally they present a screen with a message of "Log Off" and allow you to press soft key for "Exit" and the phone resets, goes through LLDP Receiving and DHCP Connecting then allows for normal use. Aside from the obvious firmware versions being different, I do not know what is causing the newly provisioned phones to experience this issue and am not sure how to rollback the firmware or if some other variable could be implemented? Any assistance would be very appreciated.