Hi
Good evening.
A. Yep,there are newer AOS available for the A3200 controller
(Please be aware that if u got XM version OR if u installed extra memory kit - And it's seems u do,because your are using version 6.2.1.0) you are able to upgraded even to the lastest os 6.4.2.4 (as far as i aware)
*in order to download lastest AOS - go to aruba support site or contact your aruba reseller/partner *
B. You RAP(Remote AP'S) units will upgraded from the controller automatcillty (As long as the RAP and your controller got connectivity UDP4500/UDP69)