They will probably need to install vectoring technology which is a noise cancellation system. This is what Proximus uses here in Belgium. FO to a street cabinet 1.2km far from the final user.
It works well with my backup (still in ADSL, I'm too far from the "FO system") connexion which has an upstream of 0.4Mbps and I barely see it with my normal connexion 100/5Mbps (coax cable).
This is very tiny packets but a huge amount depending of the number of signals.
Maybe you can ask the French operators if they have problem with their connexion: http://www.blitzortung.fr
It works well with my backup (still in ADSL, I'm too far from the "FO system") connexion which has an upstream of 0.4Mbps and I barely see it with my normal connexion 100/5Mbps (coax cable).
This is very tiny packets but a huge amount depending of the number of signals.
Maybe you can ask the French operators if they have problem with their connexion: http://www.blitzortung.fr