E410 connection lost after 1h

Hi,
I’ve a problem when I use an ap for more hours (such for videoconference). I set session timeout and inactivity timeout respectively in 28800sec and 14400sec, but after one hour of use, client is disconnected. Is there another parameter that I’ve to change?
Thanks

Guest access or wpa2 network ?

Wpa2 network. Thanks

Could you please share tech-support when client disconnects.