Cisco 7925G - DFS (802.11 H); Cleanair

Cisco Unified Wireless IP Phone 7925G, 7925G-EX, and 7926G Deployment Guide
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DFS (802.11h)
In the DFS (802.11h) configuration, channel announcement and quiet mode should be enabled.
Power Constraint should be left un-configured or set to 0 dBm as DTPC will be used by the Cisco Unified Wireless IP Phone
7925G, 7925G-EX, and 7926G to control the transmission power.
In later versions of the Cisco Unified Wireless LAN Controller it does not allow both TPC (Power Constraint) and DTPC
(Dynamic Transmit Power Control) to be enabled simultaneously.
Channel Announcement and Channel Quiet Mode should be enabled.
CleanAir
CleanAir should be Enabled when utilizing Cisco Access Points with CleanAir technology in order to detect any existing
interferers.