Thanks for your reply.
The SureSignal unit was the old one 1st generation, but was replaced with a 3rd generation more recently. Both don't work well.
ADSL stats from DG834G
ADSL Link Downstream Upstream
Connection Speed 16079 kbps 916 kbps
Line Attenuation 14 db 3 db
Noise Margin 12 db 12 db
I'm close to the exchange (less than 1km), but that noise margin looks high I think doesn't it.
Edited by cuthbei (Tue 22-Oct-13 19:10:06)