It seems the current SIP firmware (4.0.8) does not support IPv6.
In the knowledge base I found this article from May 2014 that IPv6 support is "planned for the Q4 release and will be basic IPv6 support". However I am not sure if this applies to the SoundPoint products or not.
What is the status of IPv6 support for the SoundPoint IP products?
Traditionally we do not discuss new features within the Polycom community as this requires a NDA to be signed.
I can only recommend you to contact a Polycom Sales Engineer via your Polycom reseller.
Please ensure to provide some feedback if this reply has helped you so other users can profit from your experience.
Polycom Global Services
---------------- The title Polycom Employee & Community Manager is a community setting and does not reflect my role. I am just a simple volunteer in the community like everybody else. My official "day" Job is 3rd Level support at Poly but I am unable to provide official support via the community.
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