Sennheiser DECT Wireless headset compatibility for 5x Series

This link does not list the popular Sennheiser DW series (DECT headset). Have these been tested on the 5x series phones? If so, do we have a Sennheiser DECT alternative to use with the 5x series phone sets (without having to use lifter accessory).

Yealink Headset Compatible List