The telephone connection was faulted As with many other reviewers also with us to the repeater worse than with: crashing noise, rapid tone - completely useless.
Not even the various tips from this forum (Firmware Update, gradually increasing the distance, etc.) have not helped.
In other scenarios the product might work, yes, in our (old building, no huge distances, Fritz box 7270 to date), it is a total failure and goes back.