As I was getting good error stats on my long wire from the exchange, I asked to get interleaving switched off on my line - i.e. fastpath. So with nothing else apart from standard ADSL2+ and fastpath I get:
And I get the following summary from my Netgear DG834PN
| ADSL Link |
Downstream |
Upstream |
| Connection Speed |
6100 kbps |
1157 kbps |
| Line Attenuation |
48.0 db |
24.7 db |
| Noise Margin |
6.1 db |
6.4 db |
Assuming things stay stable (based on the advanced stats) I will go for a lower noise margin profile.