Longer Session Timeout

unknown

Does anyone know if it's possible to get a longer than 10 day session timeout for the Smartzone 100 product using Hotspot (WISPr) as the authentication mechanism?  I work at  a college without dorms, and, ideally, I'd rather have the authentication need to happen once a semester. Once every so often wouldn't be so bad, but doing it every ten days seems a bit 'short' comparatively. 

If not, does anyone have another suggestion for how to get wireless BYOD clients connected and authenticated via LDAP or RADIUS that would allow them to hold such registrations for a longer period of time?

Thank you!