Hi, we've recently had a line fault repeared by an engineer along with a DLM reset because the fault completely ruined the speed. I have a screenshot of what our speeds where a couple weeks ago before this fault occured and what they are currently. We had the 3db noise margin active, will this reactive itself again because it gave us a 10mb increase which is really good for this household.
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Yes, but its academic as it is the actual data rate that matters. The maximum data rate is just a theoretical figure taking in to account your line parameters at the time. Its low now because G.Inp and 3dB margin haven't kicked in yet.
A 0.2dB negligable attenuation decrease can be put down to the temperature of the copper wire at the time of measurement.