I just moved into a brand new house. Chorus came along a few days back and hooked up the fibre and fritz box. It all seemed fine. I got my computer up and running again and started a download on steam. It gets up to about 3mbps and then drops out - and since I am on a fibre only section, my phone drops out, everything drops. Takes a minute or two to come back, and then does it again. It seems to work fine if I am just doing stuff without a lot of downloading (I was playing Guild Wars 2 for an hour before with no drops).
The snap tech support could see the dropouts, ran some tests I got a text saying that would send a new fritz! box.
Has anyone else experienced this?