Those router stats seem to be displaying haphazardly. What router is it? Can you get another?
@Andrew: Believe you have mixed them.up.
I read them, with difficulty, that you are syncing Down at 4376 kbps on an Attenuation of 33.9 dB with 5.1 dB NM.
In which case your line is seriously underperforming. You should be getting 9 - 10 Meg Sync.
It is quite possible that your ISP has put you on a banded profile, possibly due to some past instability.
Have you removed ring wire and plugged into test socket?
1999: Freeserve 48K Dial-Up => 2005: Wanadoo 1 Meg BB => 2007: Orange 2 Meg BB => 2008: Orange 8 Meg LLU => 2010: Orange 16 Meg LLU => 2011: Orange 19 Meg WBC