Ruckus Wireless and SpectraLink Compatability
Upgrade ZoneDirector to firmware 18.104.22.168.220 or greater.
Under configure AP in ZD, set the following:
Turn on/select SpectraLink Compatability. (Disabled by default). Enable this option if this AP radio will be used as a voice WLAN for Polycom/Spectralink phones. This option changes several AP radio settings such as DTIM, BSS minrate and RTS-CTS to improve voice quality with Spectralink phones.
For optimal VoWLAN voice quality, also disable Self-Healing and Background Scanning from the Configure > Services page).