Surprisingly the TalkTalk router arrived this morning, it's a D-Link DSL-2680.
Even more surprising is I'm getting a downstream rate of 2919 kbps. Never seen such speeds!
Not so surprising is my upstream rate of 88 kbps.
Today I'll be testing voice calls with different combinations of equipment and reporting an issue with BT. I'll take whatever they say and then call TalkTalk with an update that it's still the same with their router and filters.
Thanks for the posts everyone so far, your help is appreciated.
Updated stats with TalkTalk Router:
Mode: ADSL2
Type: ANNEX_A
Status: Showtime
Downstream Upstream
Rate (Kbps): 2919 kbps 88 kbps
SNR Margin (dB): 6.2 11.5
Attenuation (dB): 66.0 36.5
Output Power (dBm): 17.3 10.3
Super Frames: 83425 83438
RS Correctable Errors: 63297 0
RS Uncorrectable Errors: 3764 0
HEC Errors: 22151 0
Total Cells: 85307 90103
Data Cells: 413140 90137
Bit Errors: 0 0
Edited by deleted (Mon 05-Dec-11 15:41:07)