There's some mention of routers here. Some allow you to change the target SNR margin "legitimately", in the sense the official software allows you to change it. In the case of the Netgears there was some hacked firmware.

http://www.increasebroadbandspeed.co.uk/SNR-tweak

Note that any hacking of the target SNR margin is not legitimate in the sense that the modem has to tell little lies to the DSLAM during negotiation. The DSLAM will specify the target SNR margin whilst you modem will secretly set it to something else.

Note that all this only works on the downstream side of course.

With a hacked NetGear I used to be able to reliably run at 3dB SNR margin, but my line was running at about 5mbps and was stable.

Another word of warning is that in setting the target SNR lower it may be prones to more dropouts and line errors which, whilst corrected, can still cause you performance problems.

In all, it's potentially expensive. However, perhaps you might have a look on eBay. I suspect with the advent of VDSL2 there are a lot of second hand models around.

They may be old however the 2wire 2700-HGV has an excellent modem on long lines.

With a long and potentially noisy line, tweaking te margin down to 3dB may give you a higher "apparent speed" however you can end up with increased errors and overall no improvement.

Invest £5 to £10 in a 2700 (not a 2701) and try it out. If the line is stable, the DSLAM and modem will negotiate a 3dB margin as a matter of course. When I was on ADSL, my line went to 3dB and stayed there for years and even as the SNR changes during the day the modem would hold up even when the SNR dropped to zero.

I fitted a 2700 to a line running at around 800kbps, it is now giving around 1.4 to 1.5 Mbps.

I still think you have got something else causing issue on the line here... as above I have got more speed from a longer and noisy line so yours should get more as it appears shorter!

Thanks for the tip, just ordered one off eBay

I'll see if I can get hold of a corded phone and try a quiet line test. There is some noise when using the wireless handset, but I put that down to it being wireless.

If there is some noise on the line, can i raise this as a fault (without risk of being charged for the call out)?

Should it be completely quiet, or is there an acceptable level of noise?

Unplug all ADSL hardware including microfilters and if still a noisy voice line then report it to the people you pay telephone line rental, don't mention broadband issues, just deal with it as a noisy phone line.

When engineer arrives unplug the ADSL hardware again so they can see its nothing to do with the broadband

Do not know who your ISP is... if it is not BT you may need to unlock teh 2700. Details are on this site: http://bt2700hgv.tripod.com/ir1002700HGV.htm

TO use on any ISP use the page=hurl 13 unlock method....it has never failed for me

http://bt2700hgv.tripod.com/063.htm

Scroll down to "Simple instructions for BT 270x models to be used on OpenReach 20CN/21CN broadband connections."

Ian

Thanks Ian / MHC, I'm with BT so should hopefully be fine for now, but good to know for when I change ISP.

Finally got time to upload the stats from the 2700HGV, sorry for the delay. Unfortunately it doesn't seem to have helped much, but it does seem to provide a lot more information than the homehub.

http://imgur.com/a/K2Ao4/layout/horizontal

Does any of the extra info help identify what may be causing my sync rate to be lower than it should be?

Thanks,