there are lots of variables when it comes to line errors, they can be caused by noise on the line caused by things like broken dvd players, faulty street lights etc.
they can also be caused by weather like thunder.
if you look at my ping monitor below, you will see the massive packet loss spike, where my internet didnt actually go down, but i reckon it was due to the weather.
on fttc youre likely to see between 8-20ms if your line is good. anything over would probably mean youre on interleave.
Edited by arronlowley (Thu 23-Feb-17 17:56:18)