I replaced the PSU with the one that came with the router. When I mentioned in my post above that I replaced the PSU I used the older one, which to my eyes looks like a much better PSU and much heavier but got the same results.

Various facilities were designed into the DSL spec for diagnostics and are implemented in kit at both ends (exchange end and customer end) but most service providers ignore most of them.

A decent router will not only allow you to monitor upstream and downstream sync speed and noise margin, it will also allow you to check line level error counts. If you're really lucky it'll keep separate counts of the various different kinds of error. Really any modem/router without this facility shouldn't be on anybody's shopping list, especially on any ISP's "standard router" list, but I guess Netgear have had some sweeteners on the table.

My favourite for this a while back was the BT (yes really) Voyager 2110 (it's actually a 3Com of some kind), currently on eBay for under a tenner 2nd hand, though 2nd hand kit and an existing problem may not be a bright idea. No idea what the modern equivalent would be.

I don't know routerstats or your router well enough to know if the combination offers the capability to monitor those line level numbers but that's where I'd want to look next. Perhaps someone else could comment?

This Netgear box gets some of the worst Amazon reviews I've seen for a while. In your circumstances in the first instance, I'd be tempted to acquire another modem/router, preferably one with decent line diagnostics.

Good luck.

TBH, I half tempted to junk the DGN1000 and get another router, anybody got any recs on something decent that will offer good wireless coverage?

TT, are arranging for another BB guy/gal to come out and take another look, so here's hoping that he/she finds and fixes the problem.

Edited by deleted (Mon 12-Sep-11 10:48:17)

I nearly suggested that the other day...
I can recommend something with a Broadcom chipset - it transformed my line!
See link in sig...

EDIT: And when you're having ADSL issues I wouldn't worry about the wifi coverage - getting a stable ADSL line is more important! You can always add wireless access ports or repeaters etc. to overcome poor wireless

Edited by b4dger (Mon 12-Sep-11 11:05:26)

Quick update, TT have confirmed that they don't suspect the router as there are downstream errors being reported, they've said that if they suspected the router than they'd have thought that there would be upstream errors?

That doesn't make sense to me!

Means nothing to me either

I've just had a look at your blog and that is some impressive connection speed if you line att is 50/51db. My line att is 39db and I only just about manage to connect at around 5100kb/s.

It took me a while to find the right router - and also make sure my internal wiring etc. was as clean as I could get it

I'll try to put a new RouterStats graph up soon showing things with my 6db TSNRM.

Is the newer variant of your router still a good router to go for?

Am going to wait till the engineers been, hopefully he'll find a fault and fix it but if not then I'll look at replacing the router.

I'm not 100% sure on that! Quite often corners are cut to make things cheaper!

I've bought a couple of ST585v6 from eBay - both new and boxed ex-AOL ones.
At £30 it's worth having a backup

The Netgear DG834GT or DG834v4 (must be version 4) also use Broadcom chipsets.
Or the Billion 7800n - also Broadcom is getting good reviews - see the TBB DSL Hardware forum where there are a number of Billion threads

EDIT: Just looked on eBay and there are a number of cheap 585's - might be worth a try...

Edited by b4dger (Tue 13-Sep-11 11:36:03)