The Polycom SoundPoint 301, 321, 331, 335, 430, 450, 550, 560, 650 and 670 are Certified on openUC and sipXcom.
The Polycom SoundStation 4000, 5000, 6000 and 7000 are Certified on openUC and sipXcom.
The Polycom VVX300, VVX310, VVX400, VVX410, VVX500, VVX600 and VVX1500 are Certified on openUC and sipXcom.
Note: Beware that with firmware 3.3.0 and above - Polycom often times introduces new features on their phones, prior to notifying resellers. These new features in most cases will not work on Polycom Phones until the feature is introduced within sipXcom or openUC templates. A simple method of working around this is to add the new feature into a custom file which can be uploaded to the sipXcom or openUC server, and configured as a custom file within the phone itself.