Maybe if you know so much, you could explain why one of my lines has an attenuation of 42dB and syncs at 3Mbps, and the other one has a 46dB attenuation and syncs at 4.5Mbps ? They're both feeding the same premises, and go to the same exchange ?
Do they have the same target noise margin?
Are both routers plugged into the 'test' socket (inside the BT master), or using an ADSL filtered face-plate?
Does either (or both) circuits have extension wiring?
Does one of the circuits have a longer length of overhead wire?
Are both using identical routers?
Is one of the circuits nearer to a TV, low-energy lamp, etc.?
ADSL2+ with BE
DL Sync Blimey....4707kbps now!
UL Sync 1088kbps
DG834GT with DGTeam firmware