The device works thanks probemlos FritzOS. Anyway, if you have a little idea of the matter. But the total layman would it actually manage to integrate the part into existing WLAN.
With my D-Link router has the repeater however not as well understood and is every 2 days apparently supported. Then you had to pull it from the wall outlet and restart.
Meanwhile I run it with a Asus RT-AC68U router. Here now everything works perfectly.