Which exchange?
What line stats does your router report?
As I've already mentioned the exchange is in Smallfield, Surrey but my router stats are:
Uptime: 0 days, 0:09:00
DSL Type: G.992.1 annex A
Channel mode: Interleave
Maximum Bandwidth (Up/Down) [kbps/kbps]: 768 / 5,184
Bandwidth (Up/Down) [kbps/kbps]: 448 / 4,640
Data Transferred (Sent/Received) [kB/kB]: 0.00 / 0.00
Output Power (Up/Down) [dBm]: 12.5 / 19.5
Line Attenuation (Up/Down) [dB]: 13.5 / 19.0
SN Margin (Up/Down) [dB]: 11.0 / 6.0
Vendor ID (Local/Remote): TMMB / TSTC
Loss of Framing (Local/Remote): 0 / 0
Loss of Signal (Local/Remote): 0 / 0
Loss of Power (Local/Remote): 0 / 0
Loss of Link (Remote): 0
Error Seconds (Local/Remote): 0 / 0
FEC Errors (Up/Down): 0 / 1,110,959
CRC Errors (Up/Down): 0 / 258
HEC Errors (Up/Down): 0 / 160