With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cd11IfNativeNumberPowerLevels
Cisco DOT11 Interfaces Native Number Power Levels
1.3.6.1.4.1.9.9.272.1.1.2.17.1.1
The number of transmit power levels of a radio frequency band for the radio. The value of this object should be the same as the maximum cd11IfNativeTxPowerLevel of the same ifIndex, cd11IfRadioFrequencyBand, and cd11IfRadioModulationClass. If the value of this object is 0, the radio can only receive, not transmit, on this frequency band and modulation technique.
Back to CISCO-DOT11-IF-MIB MIB page.
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