If SNR and line attenuation are good, this is something Swisscom changed, this cannot have happened by magic? As a precision this was has occured before the events of Apples outage when important storms striked.

Okay fair enough, value given by the checker matches and even is a bit less than what I have, Still this is frustrating to have a solid consistent +20% during many months and anxiogenous but I get the point. Also I had the FTTH before so it’s quite hard, but you can’t always get what you want.