It seems like a bug CSCsl17857 C1231 running 12.3(8)JEC unable to set transmit/receive antenna options. C1231 running the IOS image 12.3(8)JEC will not display the options to change antenna to diversity, right or left. The command under dot11radio0 becomes unavailable. On the GUI of the AP only display the options for antenna transmit/receive but on change and apply, you will get the error "page cannot be display".
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