This is just an update and reply to everybody (I hope)
Firstly BT did visit Thursday afternoon however as my ISP (Plusnet) have not yet made clear if they will charge or not for this visit nor posted anything on the outstanding fault ticket concerning it I feel I cannot yet venture an opinion and I am sorry for that.
Secondly I am sorry if at times I seem intemperate, this thread has become so rambling it's difficult for anybody to read, you are quite correct I cannot prove REIN as I don't have the correct instruments, I do have an analogue phone, DSLSTATS, a modem free of ISP hobbling software and an AM radio! I can also tell you when I started this I was able to sustain a BT wholesale speedtest of just over 4Mbps but now its down to 2.6Mbps. In the last 2 days alone there have been 6 incidents when snr dropped by 6dB or more 4 of those caused sync loss yet my ISP seems to think I am lucky (as I am within the expected speed range of 0)!!
Many thanks for all your comments and I wil post again when I finally get some information from PLUSNET!!

If you haven't done so yet, you need to post on the Plusnet Community forums. Reps visit there frequently - normally posting several times a day. They also less often visit here, but not this particular forum. More the dedicated Plusnet one, General, Fibre and ISP Unhappiness. The best place though is the Community ones. You get the same people, but sooner.

These are senior staff, streets ahead of the front line support. They are good, though not magicians.

In reply to a post by RobertoS:

If you haven't done so yet, you need to post on the Plusnet Community forums. Reps visit there frequently

The problem there is the moderators they insist on coalescing all posts from an individual into one long confusing thread with a historic title nothing to do with the present problem!

Anyway Plusnet have replied to tha fault ticket saying cryptically the engineer fixed something and could I monitor, well I believe what was fixed was some QLT noise by re-crimping some connections and replacing an old master socket, we also redistributed the filters at the tail of the extensions rather than being in-between the test socket and everything else.

Meanwhile the REIN?? remains, in the 48hours Thursday.Friday there were 6 hits of >=6dB of which 4 caused a resynch. Despite the sync rate being 4235Kbps the BTwholesale test has fallen to 2460Kbps so I have reported this on the fault ticket. The IPprofile for this line is IP Profile for your line is - 3.74 Mbps so I guess network congestion maybe, I am sorry I guilty of drifting off my own subject but just to illustrate the effect! The only way I keep this lines sync rate up is to disconnect again after each event is over (10-20 minutes).

As I cannot post pictures here I want to describe the snr loss curve and hopefully you will understand why a simple modem/dslam re-sync doesn't restore it. Initially the snr drops by >=6db over about 1 minute, this often causes a resync, after about 5 minutes the snr recovers about half its initial loss, then after a further 10-20 minutes it fully recovers. Radio5live interference follows this pattern being blotted out completely for the first 5 minutes followed by background noise for the remaining 10-20 minutes. The only way to restore the pre-existing sync rate and hence snr is to wait till the event is completely over and then disconnect the line to force another re-sync.
In those cases where the event does not cause a sync loss the sync speed remains but at a much lower snr as the tone bins affected are locked out till the next re-sync hence I am often running at 3dB instead of 6!

Edited by fourtytwo (Sun 28-Aug-16 15:46:17)

Just a thought -- why not get an old 2Wire 2700HGV and use it as a modem? They are supposed to be really good on long and noisy lines.

BTW: I bought myself a TP-LINK WD8968 as a replacement for my old (and cranky) Netgear DG834N. It turned out to be less stable than the Netgear -- a real disappointment. If only I could get my old 2700HGV working! [sigh]

That isn't anything I've ever seen happen there. Unless perhaps you have confused them by insisting it is REIN.

You are looking at these forums I hope? IIRC there are some "User Group" or something ones as well which aren't what I meant. Describing what is happening rather than posting about what you have decided it probably is might prevent it.

As I have no idea what or where you have posted there that's all I can comment about it.

Then of course, there is what I said about the Plusnet forum here. I can assure you the mods on this site don't do that. Like I said, the forum you chose here isn't very likely to have ISP reps visiting. And really, only ISP reps are going to get a solution for you.

In reply to a post by micksharpe:

Just a thought -- why not get an old 2Wire 2700HGV and use it as a modem? They are supposed to be really good on long and noisy lines.

BTW: I bought myself a TP-LINK WD8968 as a replacement for my old (and cranky) Netgear DG834N. It turned out to be less stable than the Netgear -- a real disappointment. If only I could get my old 2700HGV working! [sigh]

Hello Mick, well I don't like the look of these newer exorbitant claim modems, its all in the wifi and probably increased noise levels around the dsl so I am not surprised with your findings. As for the netgear I used to have one and the 8960 is streets ahead, but I have never tried a 2700 if I get the opportunity I will and thanks for the tip!

Your points answered below

In reply to a post by RobertoS:

That isn't anything I've ever seen happen there. Unless perhaps you have confused them by insisting it is REIN. Nope I started a thread about QLN plot's.
You are looking at these forums I hope? IIRC there are some "User Group" or something ones as well which aren't what I meant. I am posting to this thread on this site
here
Describing what is happening rather than posting about what you have decided it probably is might prevent it. I have posted both what is happening and my opinions

As I have no idea what or where you have posted there that's all I can comment about it.
Then of course, there is what I said about the Plusnet forum here. I can assure you the mods on this site don't do that. Like I said, the forum you chose here isn't very likely to have ISP reps visiting. And really, only ISP reps are going to get a solution for you.

Well initially I was probing for other peoples opinions and experiences as I had had no satisfactory response/interest from Plusnet

Edited by fourtytwo (Sun 28-Aug-16 16:56:30)

In reply to a post by fourtytwo:

Despite the sync rate being 4235Kbps the BTwholesale test has fallen to 2460Kbps so I have reported this on the fault ticket. The IPprofile for this line is IP Profile for your line is - 3.74 Mbps

Just a quick update the speedtest rate has risen to nearly the profile today 3780 vs 3810Kbps either a bit of midnight processing or someone reading the fault ticket

Another lil update, firstly as I had no faith anybody would do anymore I took matters into my own hands, I removed the close coupling between the drop cable and power cables and since then no events on my DSL, OK it's only been just under 48 hours as I did it Monday morning.
The reason I am posting this now is startlingly Pnet want to send another BT engineer to investigate REIN so I had to come clean I very much hope he might replace the cr*p drop cable altogether or at least decide it needs re-routing. In any case my opinion of Pnet is rising, they escalated my ticket internally did a decent investigation and decided it needs more work, so here is hoping
Ohh and nobody at Pnet this time told me I was getting more than 1Mbps so should be happy, perhaps the penny is dropping that this really p*sses of customers.

Edited by fourtytwo (Tue 30-Aug-16 20:40:21)

Glad you got a fix in the end

Happy days!