Yealink Device Support
Support for mixed Polycom and Yealink environment is an additional subscription otherwise your subscription will suport just Polycom or Yealink.
Unless stated, the product works the same way if you are using Yealink even though most examples in the documentation are for Polycom.
The key areas of difference are Software for a Yealink only subscription. For a mixed Polycom and Yealink environment the Device Profiles and Software sections needs special review.