Annex M

[Dougc]

Apologies if this has been answered elsewhere; I couldn't find an answer after searching.

I'm currently on one of IDNet's - albeit slightly older - packages, Home SuperPro LLU.  I work from home a lot and I've been investigating how I could possibly increase my upload speeds as unfortunately BT appear to have completely missed my area as part of the FTTC rollout.

The stats my modem (TP-Link TD-8616) is currently reporting are:

	Downstream	Upstream
SNR Margin	6.6 db	9.4 db
Line Attenuation	45.9 db	25.1 db
Data Rate	5776	933

Based on this information, I was wondering if anyone could have a stab at whether or not potentially upgrading to a package with Annex M would give me any benefit?  The reason I ask, is that I don't appear to be getting the maximum upload possible (1.4Mb?) for standard ADSL2+, so does that mean that changing to Annex M wouldn't give me any sort of increase?  I'm not overly concerned about my downstream, 4Mb would be perfectly adequate assuming I could increase the upstream.

Also; does anyone know if IDNet allow you to switch to Annex M on anything but their £90 a month (top) package?  Although I may end up having to go with this if not, I'd prefer not to if possible as I really don't need all that bandwidth!

Thanks in advance for your help.

[Steve]

I don't think we've been asked the question before. I think to increase your upload with Annex M you'll swap some downstream speed to the upload side how much either way I've no idea. Regarding it's availability with IDNet again not sure but I can see it on the premium package. IDNet's provider of LLU do offer Annex M on one of their packages at no extra cost perhaps time to see if support are amenable without paying that amount.

[MisterW]

The reason I ask, is that I don't appear to be getting the maximum upload possible (1.4Mb?) for standard ADSL2+

The main reason for that is your Upstream margin is too high. It looks like the DLM has decided there were too many upstream errors and has therefore increased your Upstream Target SNR from 6db to 9db. This will effectively reduce the potential maximum upstream speed. One possibiliity would be to try and get a fixed upstream profile with a 6db margin which would likely give a few 100k more upstream speed but higher error counts. It can be done, but ISP's and BT are reluctant to do it for some reason...