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You wouldn't expect it to make the SNRM go up and down like a yo-yo though, nor would it cause 12Mb of sync to be lost in one go, at midnight ;)
 
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The loss of 12 Meg of sync is consistent with what I've read about the effects of cross-talk.

I presume that if that's what is responsible then the sync rate may wander up and down over time as others connect and disconnect.

It's all a bit random since you could have dozens of connected modems with none of them creating interference for others, or, some or many of them, depending on how the physical wires are routed and how close they run together e.g. if they're in the same bundles.

Though I don't know enough to know whether that would have the effect you're seeing with the noise margins. Cross-talk is 'noise', yes, but exactly midnight seems a bit odd. I thought that the cabinets 'responded' in real time, not some scheduled task which happens to run at midnight every night.

On the other hand maybe the installation of a new service for someone else has interfered with the physical connection (e.g. the actual wiring) at the phone cabinet in some way. Did you get any joy with having it looked into?
 
Openreach visited, said he located a large source of REIN very close-by. Couldn't open a REIN case as not enough history to make a pattern, even though the issue is there all the time.

It isn't crosstalk as the engineer's test said the crosstalk was at almost zero.

I forgot to ask him how many lines there were in the cabinet but talking to others, uptake seems to be quite low.
 
Is it from the electrical (?) cabinet near the noticeboard on the corner by any chance? :)

I think modem and other power supplies in the home can turn out to be the culprits too. Might be worth walking around turning things on and off to see if any particular thing causes changes.

If there is a large source of electrical interference in the area generally it might explain why Three 3G is problematic/has drop outs, and why the noise margins on so many ADSL lines are at 15 round here and perform poorly.

So what's required to 'build up a history', do you need to report this every week and have an engineer out every week finding the same time and time again before someone then investigates it?
 
Modern switch mode power supplies used in modern electrical equipment and lighting can run at high frequencies, but not usually much above 20KHz. However, one of the lighting power supplies I have was emitting out of band interference all the way up to about 1MHz, which could well interfere with DSL.

Just a thought, Alton is not too far from Odiham, so could it be something to do with the aircraft. I have heard of aircraft harming freeview reception, and that's in the 400-700MHz region.
 
Is it from the electrical (?) cabinet near the noticeboard on the corner by any chance? :)

I think modem and other power supplies in the home can turn out to be the culprits too. Might be worth walking around turning things on and off to see if any particular thing causes changes.

If there is a large source of electrical interference in the area generally it might explain why Three 3G is problematic/has drop outs, and why the noise margins on so many ADSL lines are at 15 round here and perform poorly.

So what's required to 'build up a history', do you need to report this every week and have an engineer out every week finding the same time and time again before someone then investigates it?


We're migrating to Plusnet or AAISP as TalkTalk are useless for fault finding.

The REIN came from one of the bungalows just round the corner.
 
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If the speed drops a bit more - IIRC your estimated speed was below what you got initially so at the moment the true speed may not be far below the estimate and so is acceptable - then you might be able to get more help from Talk Talk by citing OFCOM's Code of Practice for broadband speeds and that you'll be cancelling your service without penalty and going elsewhere if it's not sorted by dd/mm/yyyy. The Code isn't worth much but there might be some mileage in it.

If the BT engineer has reported the fault as being a REIN issue (as opposed to "no fault found") then presumably that gets fed back to Talk Talk. Who you would then imagine would throw it straight back at BT, point out the BT is saying there's a fault with BT's network, and therefore BT need to get on the case and fix it and stop prevaricating.
 
Nope TalkTalk want to close the fault as the OR engineer couldn't build a REIN case as I stated before.

We're migrating away to Plusnet.
 
My mother has this habit of telling stories which have a logical sequence and a bizarre ending that makes no sense.

We have investigated.
We have found a fault.
We think we know what's causing it.
Conclusion: We have closed the case without action.
 
I can only tell you what we were told.

Looks like another OR engineer will be coming out soon and I think I may purchase a JDSU so I can do constant line condition monitoring as I suspect we have a developing HR fault.

Sync has dropped a further 5Mb this morning to 31852 Kbps. It was at 36 Mb yesterday (sync at the same time as today). We got 52 Mb when we first joined.

Our minimum speed is 25.7 so soon we'll be able to get a different fault raised.
 
I wasn't having a pop at you, just making fun of Talk Talk and Openreach's fault diagnosis and follow up procedures ;)

If you can get this resolved with Talk Talk I guess that's going to be quicker than migrating. While anecdotal only, I am seeing quite a lot of threads about congestion with PlusNet lately, but then it is cheap, and only appears to affect specific areas.

If it's clear-cut that when you pick up and put down the phone the noise values are wandering or the connection is dropping then AFAIK, HR faults are fairly readily locatable and repairable and since it doesn't seem to only be when it rains - since it hasn't rained much - then it should be reproducible.
 
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