Bernd,

At this point the lights on the router mean nothing. My internet is off and on at random times and it's been like this for months now. I use Wi-Fi because of the way the house is designed and apparently only one telephone outlet works. I have a second router connect to the speedport just to get Wi-Fi to reach the entire house. The problem is not the Wi-Fi, it is the internet connection. That is what the errors always say. I also cannot make or receive calls on my phone. In the picture attached you see the Wi-Fi signal has full bars with "!". It's been that way for over 1 hour tonight. All of a sudden every device start to load slowly, if at all, we get error messages that sites cannot load and thing start buffering. I'm back on LTE to send this message. I have used all of my LTE for the month partially because of this problem. We do not only use the internet for entertainment. We cannot even complete our work in these conditions. It's annoying and inconvenient.