Hello James, thanks for your reply. I will try this, but its only a "hack" not a customer friendly solution.
I know you could do several interesting stuff at the CLI/linux busybox. With knowledge of the filesystem I've placed a picture in the guest portal voucher, also a hack, but many customer ask for it. The downside is not update save. Solutions like this are cool for "geeky" wireless guys or admins, but customers like easy useable solutions.
Hopefully Extreme listen more to customer requirements and the feedback from the Systems Engineers working in with there production in real world scenarios. Channel utilization history is one important feature every vendor should implement in there NMS/WNMS. Its not nice to have, its a must have in my opinion.
Kind Regards
Hartmut