In reply to a post by WWWombat:

However, they may want you to take steps to ensure that the problem is not caused by an issue with the internal wiring. Usually they do this by making you take the faceplate off to disconnect the extensions.

That does't help with (common) star wiring faults as then the problem internal wiring won't be disconnected by taking the faceplate off. However, star wiring is somewhat unlikely for mlmclaren as sounds as if he is in a new build.

For mlmclaren: star wiring is where there are extensions taken from the incoming feed before the line reaches the master socket. This is common on old systems (often wired up in pre-broadband) and did not cause significant problems on ADSL, but wreak havoc with VDSL/FTTC. As well as telephone extensions, old Sky box wiring and alarm systems were often star wired.

In reply to a post by mlmclaren:

Hi thanks I had thought of that but I'm thinking of the approach to Plusnet as they sold me something and failed to mention ...

By dropping below Plusnet's estimated speed, you may indeed be able to invoke contract clauses that lets *something* happen..

But it doesn't mean that Openreach will be forced into doing something on your line; they (unfortunately) seem to be able to get away with responding based on the current estimate. You might only end up with one remedy - to leave Plusnet.

If you did that, then you'd have a new provider, who would give you the new, lower, estimate. And still with no promise that speeds won't drop. As they'd use the same BT cabinet to supply you, and the same physical copper line, you'd get exactly the same speeds.

that within a month I would lose nearly 15% of bandwidth and go from having the best latency and great online gaming experience to not being able to play online gaming anymore.

61Mbps to 56Mbps sounds like just under 10% to me.

Otherwise, it sounds like DLM has intervened - as the normal reaction is a loss of around 10-15% of speed, and an increase in latency of around 8-10ms.

Those changes would impact gaming, but not make it instantly impossible. If things have become totally impossible, then you are suffering some other problem - likely entirely unrelated to your line, and likely nothing that an Openreach engineer could do. Severe congestion would be such a problem - but you'd probably be seeing download speed tests drop a lot further in the peak hours (9-11pm).

On the positive side, BT are gradually introducing a new form of DLM, known as G.INP. That works to restore stability to your line in a different way, where you generally incur less of a speed drop, and less increase in latency.

If you want to restrict your own speed, so as to persuade DLM to de-intervene, then you want to check out the Kitz forum, looking for places where they are talking about the command "xdslcmd --configure --maxDatarate", or something similar. One example would be:
http://forum.kitz.co.uk/index.php?topic=14611.60

Also I've noticed that my speedtest.net server seems to think I'm up by Sheffield usually it put me locally by Maidenhead and ideas why this has happened.

It usually gets the idea of location from your IP address. For plusnet, it doesn't matter where Speedtest.net thinks you are - a tester in or near London is best. I find the Vodafone server in Newbury is the one that gives me the most stable results.

Hi Everyone

Just got off phone with Pluisnet and now they have listened to my issues besides the sync speed loss they have agreed to send an engineer on Monday morning.

I'm going to try and answer all you questions now,

My line is syncing at around 55000kbps now, compared to 62000kbps on Sunday!

I have removed all phone extensions from the NTE to assure no issues but I've seen no changes, all wiring is brand new is mentioned repeatedly.

My house and the area was developed in the early 70s and no telecoms where installed on my street until after people has moved in, and even then it was only to parts of the street who paid to have them installed.

Euro bell brought cable to the area and everybody including the previous tenants of my home has that installed rather than BT due to the cheap or free installation costs, (BT wanted £200)

Virgin also didn't bury cables as deep as BT was required to so therefore looked my attractive (until someone dug over the flower beds of course)

When I said the line was silent I meant there isn't even the hum you would normally be expected to hear from the exchange.

As my installation was by an engineer I should be expecting speeds within the clean line range then Yes?

In reply to a post by mlmclaren:

When I said the line was silent I meant there isn't even the hum you would normally be expected to hear from the exchange.

What hum do you normally expect from the exchange?

If you can provide line stats showing Attenuation, SNR margin, Sync speed and Max Attainable speed, it should be possible to tell if you have a line fault and what your connection should be able to deliver.

http://tinypic.com/r/14v4nrt/8

Your definition of star wiring isn't quite right.

Star wiring is indeed where the connections to multiple extensions fan out from one spot - but it doesn't have to happen from a point before the NTE (master); it can equally happen at the master, or after it, too.

Star wiring from/after the NTE isn't so much of an issue to VDSL2 (though is still not best practice), while star wiring that originates before the NTE is, as you rightly point out, a big issue.

However, the distinction of taking the faceplate off remains important. If the problematic wiring remains connected to the line, even with the faceplate disconnected - then it remains BT's responsibility - it is, by definition, their wire.

In reply to a post by mlmclaren:

As my installation was by an engineer I should be expecting speeds within the clean line range then Yes?

That would be the right assumption.

What were the other issues that made Plusnet change their mind?

In reply to a post by mlmclaren:

http://tinypic.com/r/14v4nrt/8

Is that current?

If so, you are syncing at 57.7Mbps, a little higher than your previous post; the comparatively high value of the attainable speed is typical of the ever-estimate seen when DLM has intervened - the usual "normal" speed would instead be around 63Mbps.

Unfortunately, the GUI for the unlocked HG612 has some bugs - one of which is that the attenuation is not displayed.

Better figures come from the command-line, and using the "xdslcmd info --stats" command and the "xdslcmd info --pbParams".

As you have the modem unlocked, perhaps the best thing to do would be to run one of the logging programs - either the "HG612 Modem Stats" or "DSLstats" found
http://forum.kitz.co.uk/index.php/board,46.0.html

Combining either of those with the "MyDSLWebStats" site can help too.

The fact that i'm seeing inconsistent and unstable speeds and that streams keep stopping randomly and that I have to intermittently refresh webpages 2/3 times for they load successfully.

They also now understand that the line is actually brand new and that it took 2-3 hours for just the phone to be connected and that the tests run o the line indicated it to be an "excellent" line and that I would know if any new properties had been added to the network as the work required to connect the lines isn't exactly quiet due to the roadworks required.

Also maybe my comments about not receiving the speeds originally indicated upon ordering and quoting parts of the terms and conditions that I agreed to on ordering the service.

I also noted that in my experience Interleaving isn't normally applied at such a high rate straight away and that it normally staggers until errors stop but in this case that didn't seem to happen.

Unfortunately the attenuation isn't shown, but there is a large gap between sync speed and attainable speed.