Extremely low upstream sync during certain hours of the day.

[#1]

During roughly the hours of 1pm-9pm the upstream sync rate plummets from around 8mbps to sub 1mbps often times <500kbps rendering the connection moreorless unusable and unstable with many disconnects occuring. While the down rate is also affected (under normal conditions syncing at around 35mbps) it doesn't seem proportional whatsoever.

After 3 engineer visits that occured outside of this time period where the connection is otherwise perfect (albeit with a lower than usual sync rate due to disconnects during these aforementioned hours), all 3 seeing that everything is fine, they change a faceplate advise to change some wires and reset the DLM and are happy to call it a day. However this issue has now persisted for around 6 weeks with no real resolution in sight.

Is it at all possible that the origin of this problem could be from within the house? Any help with this matter would be greatly appreciated. 

[#2]

@Welpz Those figures are strange, and if they have persisted over that length of time and after the engineer visits and work, I can only suggest it could be something in the home environment - but I don't know what.

Do you have anything electrical at home that is operational between 1300-2100, or are you near any external equipment which may be - electric fencing on a farm or stables, for instance?

It may be helpful if you could export your Hubs error log and attach the resulting .csv file to a post,

[#3]

No to the fencing. What kinds of electrical equipment are operational between that band? Although i cannot think of any recent changes in particular to cause this issue. Error log (i think) attached. 

[#4]

OK - the fencing idea was just a thought. Any electrical kit could be causing the issue - how long has it been going on for, and do you have anything in house that ties in with it, or know of any changes externally?

I'll have a look at the error log later tonight/tomorrow morning - need a clear head.

[#5]

Thanks for your replies, i can't think of anything in particular as of now but i will keep it in mind, this issue began around 5-6 weeks ago and if anything the severity as increased over time. In the beginning there would be a disconnect followed by a resync at around 500kbps upload followed by another disconnect where the router then syncs as normal for the rest of the day. 

As of now however i would say that this period of extremely low upload speed exists for around 6-9 hours at around the 500kbps mark but sometimes slightly higher with what i believe to be noise present on the line throughout this time, infact if i even listen into the line using a landline phone while the internet is connected during this period it will cause the internet to disconnect if that means anything.

Again thank you for your time and your replies. 

[#6]

'with what i believe to be noise present on the line throughout this time, in fact if i even listen into the line using a landline phone while the internet is connected during this period it will cause the internet to disconnect if that means anything.'

That suggests a voice-side problem, but for it to be restricted to that time-frame doesn't make sense - can you try the phone test outside this period?

I've had a very quick look at one specific set of data on that csv download, and you have had a very excessive number of DSL drops, which I am surprised don't appear to have altered your SNR margins, which again is strange, I'll have a more detailed look tomorrow morning.

[#7]

What do you mean by a voice side problem? Yes i'll keep seeing if that problem is present throughout other time periods. 

[#8]

I mean the phone signal - both it and the internet come down the same wires and are 'split' at your master socket - either via a 'dangly' filter on an older master, or internally if you have a dual socket one. However, as the telephone line was originally only to carry the phone signal, a fault on that side can swamp the internet side - which I am suspecting is the case here - note, suspecting, because we need to confirm the 'noise'.

[#9]

Yeah right now the router is syncing at it's usual high speed and i'm able to disconnect the internet through either listening into the phone line using a handset or even by calling the house and having a phone call open that lasts over 40 seconds, over the duration of the phone call i'm able to watch the noise margin over time drop down from it's usual 8 or so eventually to 0 causing the internet to disconnect. 

[#10]

In that case report a phone issue via this link: https://www.plus.net/help/report-a-problem/ , and impress on the engineers when they come that this is a problem with the external  OpenReach) connection. After three visits (same engineer?) they really should be looking further than your house.

[#11]

Thanks for your help, 3 seperate engineers and yes i have an open ticket that i will relay this information to, i still don't really understand why this issue would only manifest itself during certain hours of the day but hopefully this will be sorted soon regardless. 

[#12]

The fact it is only apparent during certain hours confuses me too - this type fault just doesn't 'disappear' . In that case, you have been very unlucky with the engineers - having done what they have internally and not resolved the issue, they should know to check externally.

[#13]

Yeah right now the router is syncing at it's usual high speed and i'm able to disconnect the internet through either listening into the phone line using a handset

That's clearly indicative of a physical line fault. Could the 'heat of the day' be affecting a poor joint or a bad part of the line somewhere ?

[#14]

Good point, @MisterW - must admit I never thought of that, I am so used to damp being the issue. Still doesn't explain why three engineers haven't done a  physical examination of the line, though.

[#15]

Still doesn't explain why three engineers haven't done a  physical examination of the line, though.

It really depends on whether you get an engineer who's interested in solving the problem OR seeing the fault isnt present at the time just wants to get onto the next job...