Dandemon wrote Try turning on SRA (seamless rate adjustment) in the advanced DSL settings. By default it's not enabled, but it should be. This helped for me... Quicker connection too...all round...

I just purchased this modem/router yesterday. I was having issues with NetGear D6400 doing the same thing. Not only does this one do it, but the wifi strength is no where near as good as the NetGear