Links to Yealink support pages by model.
CP925
https://www.yealink.com/en/product-detail/conference-phone-cp925
CP935W
https://www.yealink.com/en/product-detail/conference-phone-cp935w
CP935W-base
https://www.yealink.com/en/product-detail/conference-phone-cp935w-base
CP965
https://www.yealink.com/en/product-detail/conference-phone-cp965
T54W-dd10k
https://www.yealink.com/en/product-detail/dect-phone-t54w-dd10...