Michael - is it on by default then? I don't see a setting in the unleashed GUI and the commands given by support appear to be for the ZoneFlex version of the R710 using a "set" command.
Yes, UAPSD in WMM is supported by default, and the 'Spectralink' setting will additionally perform many other VoIP device related settings. It does take active Support contract to view Knowledge articles, but one Unleashed support for up to 25 APs.