I am using Ruckus Zone director 1100.
I could not increase inactivity time out more than 10 minutes.
to change the inactivity time out:
configure -> WLANs -> (my ssid) -> Edit - > Advanced Options - > Inactivity time out
"Terminate idle user session after  minutes of inactivity."
When i enter 11 minutes and click ok, it displays
"Inactivity Timeout must be a number between 1 and 10".
Kindly help to solve this issue.