Think your line is bad?
Check out mine... LOL.
Attenuation: 63
SNR: at best, 6 or 7. at worst,. 0

Very unstable connection but sometimes quite ok.
The line is to blame actually. I'm at the very limits of the ADSL distance. last 1-2 months last year, totally cannot connect except on some good days, for a while. Early this year, the telekom tech came and rewired our house to the pole, improved enough to be able to connect with results as above.

TM is both not at fault and at fault for this. Not as fault because it is stretching the distance limits of ADSL. At fault because they are simply money minded and just want to make that monthly pay out of you even if you're going to get bad service. The telekom tech himself said that by right, my house should be out of the ADSL coverage area, but the people still want to make money. We applied streamyx some years back but they said no coverage, and last year we tried again, we got the service. But actually they made no changes to the coverage area, they just stretched the limits to my house.