In a system that contains only 1 radio, Radio 1 can be configured for 802.11b/g or 802.11a. In a system that contains 2 radios, Radio 1 will be configured for 802.11b/g and Radio 2 will be configured for 802.11a regardless of the user setting. One will get a set-fail if attempts to make a change. Note that 'aRadio' means an 802.11a standard radio that uses the 5.0 GHz band, and, 'bgRadio' means an 802.11b and 802.11g standards radio that use the 2.4 GHz band. An 802.11n radio can use both 2.4 GHz and/or 5.0 GHz bands, so, both these values are applicable for an 802.11n radio.