Re: Cannot answer Calls by pickup the handset with VVX
welcome to the Polycom Community.
The phones would have not been shipped with UC Software 5.5.0 and as mentioned in the Skype for Business FAQ and the Release Notes UC Software 5.5.0 is not a supported software for Skype / LYNC.
Please downgrade the phones, factory reset them and sign into Skype / LYNC again. Not knowing if these are brand new or used we cannot confirm if they have pre-configured configuration preventing the phone from answering a call via lifting the handset.
There is a post in the VoIP FAQ documenting this feature.
Please ensure to provide some feedback if this reply has helped you so other users can profit from your experience.
Polycom Global Services
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