1230 is supported on the 5508, so long as you are running 7.0 code. As of 7.2 it is no longer a supported AP. Per the NCS Release notes the 1230 is supported.
http://www.cisco.com/en/US/docs/wireless/ncs/1.1/release/notes/NCS_RN1.1.pdf
Steve
HTH,
Steve
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