Noise margin dropping

[boothy_08]

These are my current stats after my router resynced while I was out


ADSL LinkDownstreamUpstream
Connection Speed6688 kbps896 kbps
Line Attenuation39.0 db23.5 db
Noise Margin8.8 db13.0 db

Are you connected to the master socket? Or an extension socket?
Try the test socket behind the master socket faceplate and check the stats.

[jorkila]

Just been on the phone again and turns out i was on gdmt and now set back to adsl2+ but still the same as before, the guy says there is something not right he just can't put his finger on it, he's asked me to try a different router and is calling me back in a few minutes.
Stats are from the test socket.

[jorkila]

Quick update after lots of testing and tweaking they have found that my broadband cable is touching my phone cable causing static build up and should hopefully be fixed over the weekend!!

[jorkila]

Another quick update, still not fixed they've had another two engineers at the exchange and still not found the fault themselves. Sky are sticking with it and escalating it higher and hopefully will be sorted soon, really have to say that sky have really been on the ball with keeping me updated after actually admitting that there is a fault somewhere on the line (just outside the exchange apparently) just a shame bt aren't quite so on the ball!!

[jorkila]

They say a particular line test being performed is only travelling 200m rather than my actual line length of 2000m, anyone else come across this before?

[User05]

Yes, it's just part of the diagnostics via a 'Single End Line Test' ('SELT'). Have they referred to a 'bridged tap' at 200m on the line?

[jorkila]

They originally thought that but now say that two wires are making contact causing static build up?

[jorkila]

Also it would seem that i'm back on G.dmt, what is the max attainable connection rate on G.dmt?

[User05]

For Sky, the max attainable rate should be 8192 on g.dmt.

Sounds like they're describing possibly a bridged tap. What are they doing about it now?

[jorkila]

I'm currently using my own netgear router with custom firmware and it only connects on the g.dmt setting but i'm syncing at almost 9mb which is strange lol.
Basicallybt have left something open so that sky are now unable to reopen the case until its closed if that makes sense and then they're escalating it further within their own team or something