Cisco 8861 Deployment Manual page 53

To utilize CCKM for fast secure roaming, enable WPA2 policy with AES encryption and 802.1x + CCKM for authenticated
key management type.
The WMM policy should be set to Required only if the Cisco IP Phone 8861 and 8865 or other WMM enabled phones will be
using this SSID.
If there are non-WMM clients existing in the WLAN, it is recommended to put those clients on another WLAN.
If non-other WMM clients must utilize the same SSID as the Cisco IP Phone 8861 and 8865, then ensure the WMM policy is
set to Allowed.
Enabling WMM will enable the 802.11e version of QBSS. There are also the 7920 Client CAC and 7920 AP CAC options,
where 7920 Client CAC will enable Cisco version 1 and 7920 AP CAC enables Cisco version 2.
Cisco IP Phone 8861 and 8865 Wireless LAN Deployment Guide
53