Predated:plambrechtsen: As I continually say, every house needs a Master Filter to get decent broadband.
Feel free to message me your phone number and I can run a line test and then tell if a Master Filter / Splitter would improve things even more.
does this apply to non telecom customers?
A master filter for everyone. Most definitely. Able to run a line test for non Telecom customers. Not so much.