My line with 22dB (19dB ADSL1) attenuation synced at just under 17000 without tweaks, and will hit 19999 if I lower the margin using Mel's password finder app...search for it on Skyuser, you'll need it to get your DSL password to use a router to make this change more permanent.
My DG834v4 and DGN2000 sync at this speed but with a lower margin than the supplied D-Link, presumably due to the fact that the Sky router has a BCM6358 chipset whereas the Netgear's have the older BCM6348.
Expect to see more errored seconds and crc errors as you push the margin below 3dB, which Sky may or may not count and use against you later, and may or may not decrease throughput or cause packet loss. Very much line dependant.
via 2x20CN, moving one to SKY Unlimited
Edited by LadFromWales85 (Fri 04-Feb-11 01:30:35)