Thanks, @Virgo for trying to help. I don't quite understand, what is a "network environment" problem / how to solve? Could it be some kind of conflict with IP adress or system setting? I am now...

I am connecting to Wi-Fi router in house 25 m from the CPE, using client mode. I can connect to the routers, but the connection drops every 5 seconds, so not very useful. I can choose between several...