Any user upgrading from a SIP 3.2.x or previous Version is advised to utilize the cfcUtility from => here <= in order to automatically convert pre UC Software Parameters into their matching Parameters for UC Software 3.3.0.
NOTE: The tool is only converting pre UC Software Parameters to match UC Software 3.3.0 Parameters and will remove any newly manually added Parameters from UC Software > 3.3.1 or 4.0.0!
UC Software 4.0.0 changed the BootROM process into the Upgrader as described => here <=
An Overview of supported Phones in relation to the SIP / UC Software can be found => here <=
Notice: This community forum is not an official Poly support resource, thus responses from Poly employees, partners, and customers alike are best-effort in attempts to share learned knowledge. If you need immediate and/or official assistance please open a service ticket through your proper support channels. Please also ensure you always check the VoIP , Video Endpoint , Skype for Business , PSTN or RPM FAQ's