I've been trying to find out what all those numbers mean. I've emailed Draytek and they just said try them all and see what works. Well I'm not convinced I can be that scientific and surely they were developed with a certain line condition/type in mind.

I have a long line and my router can't quite maintain a 3.5mb line speed with 6 as the SNR. So it ends up alternating between a slow and not so slow line speed each time it re-syncs.

The exchange is ADSL 2+ enabled, but I don't think Plusnet Business have migrated there business customers across to the 21CN as yet. The modulation reported is G.DTM

If anyone can report what code they have used with a note of the problem they had before switching etc then maybe we can get a handle on what works best in what situation.

Thanks

Dave