Please may I have an explanation of how the SNR affects broadband delivery?

[#1]

Ah, good stuff. Resynced at the right time. Can you just check your Current Line speed (Login required).
As I mentioned in an earlier post, as your Target SNRM looks to be 9dB at present there is scope for further improvement when this interference problem is resolved.

[#2]

Quote from: Anotherone

Can you just check your Current Line speed (Login required).

I was aware of this info which reads as follows:
Estimated line speed:
    There's no speed estimate currently held on your account.
Current line speed:
    1.4 Mb
This is why I was a little surprised when I did the speed tests... 
Router Stats @ 18:30
Uptime: 0 days, 2:11:09
DSL Type: ITU-T G.992.5
Bandwidth (Up/Down) [kbps/kbps]: 444 / 1,714
Data Transferred (Sent/Received) [GB/GB]: 3.58 / 15.10
Output Power (Up/Down) [dBm]: 12.0 / 16.6
Line Attenuation (Up/Down) [dB]: 37.6 / 67.5
SN Margin (Up/Down) [dB]: 11.0 / 8.7
System Vendor ID (Local/Remote): TMMB / ----
Chipset Vendor ID (Local/Remote): BDCM / TSTC
Loss of Framing (Local/Remote): 44 / 0
Loss of Signal (Local/Remote): 5 / 0
Loss of Power (Local/Remote): 0 / 0
Loss of Link (Remote): -
Error Seconds (Local/Remote): 39,998 / 9
FEC Errors (Up/Down): 567 / 33,856
CRC Errors (Up/Down): 1 / 1,776
HEC Errors (Up/Down): 2 / 1,568
Graph no. 66a: 19 Nov,16:30-18.30

[#3]

There's another place within BTw systems where the profile is and that's the one that was stuck and Tony got that sorted.
Your Current Line Speed needs a  little kick up to 1.5.
When it's been kicked (or even gone up automatically) to see the improvement, you may need to log into the 582n and click Disconnect, wait 30 seconds and then click Connect (that's not a resync mind - you don't want that).

[#4]

The profile on our side has suitably been kicked to 1500.

[#5]

Cheers Chris.

[#6]

I did disconnect and reconnect at about 21:05...
Graph no. 67: 19 Nov,18:30-20:30
Graph no. 68: 19 Nov,20:30-22:30
Router Stats @ 22:37
Uptime: 0 days, 6:18:04
DSL Type: ITU-T G.992.5
Bandwidth (Up/Down) [kbps/kbps]: 444 / 1,714
Data Transferred (Sent/Received) [GB/GB]: 3.75 / 15.88
Output Power (Up/Down) [dBm]: 12.0 / 16.6
Line Attenuation (Up/Down) [dB]: 37.6 / 67.5
SN Margin (Up/Down) [dB]: 11.1 / 8.3
System Vendor ID (Local/Remote): TMMB / ----
Chipset Vendor ID (Local/Remote): BDCM / TSTC
Loss of Framing (Local/Remote): 44 / 0
Loss of Signal (Local/Remote): 5 / 0
Loss of Power (Local/Remote): 0 / 0
Loss of Link (Remote): -
Error Seconds (Local/Remote): 43,098 / 9
FEC Errors (Up/Down): 995 / 277,625
CRC Errors (Up/Down): 10 / 6,537
HEC Errors (Up/Down): 15 / 6,302

[#7]

Graph no. 69: 20 Nov,22:30-00:30
Graph no. 70: 20 Nov,00:30-02:30
Graph no. 71: 20 Nov,02:30-04:30
Graph no. 72: 20 Nov,04:30-06:30
Router Stats @ 07:15
Uptime: 0 days, 14:56:23
DSL Type: ITU-T G.992.5
Bandwidth (Up/Down) [kbps/kbps]: 444 / 1,714
Data Transferred (Sent/Received) [GB/GB]: 3.98 / 16.70
Output Power (Up/Down) [dBm]: 12.0 / 16.6
Line Attenuation (Up/Down) [dB]: 37.6 / 67.5
SN Margin (Up/Down) [dB]: 10.6 / 8.5
System Vendor ID (Local/Remote): TMMB / ----
Chipset Vendor ID (Local/Remote): BDCM / TSTC
Loss of Framing (Local/Remote): 44 / 0
Loss of Signal (Local/Remote): 5 / 0
Loss of Power (Local/Remote): 0 / 0
Loss of Link (Remote): -
Error Seconds (Local/Remote): 47,350 / 9
FEC Errors (Up/Down): 995 / 417,209
CRC Errors (Up/Down): 10 / 11,536
HEC Errors (Up/Down): 15 / 10,622

[#8]

Quote from: Richard

I did disconnect and reconnect at about 21:05...

Did you see any improvement on the BT Speedtest?

[#9]

Hello Richard, RSL setup, Graphs, Noise Margin Vertical Axis, can you set the minimum to 2 please and leave it on that for now. I assume it's not on automatic - no real need if the max & min are set appropriately.

[#10]

Quote from: Anotherone

Did you see any improvement on the BT Speedtest?

As you will see from my Reply #133, my IP Profile is - 1.51 Mbps and at 4:40pm, I achieved a download speed of 1.33 Mbps and at 9:10pm, reply #141, it was 1.32 Mbps...

[#11]

Sorry, I apologise, I did miss that one, can you run another now, that last one was certainly not good enough and I hope it's going to be improved now.

[#12]

The way your SNRM has been varying this last week is one of the oddest I have seen in a long time. Whilst I can see the usual day/night & night/day transitions which are greater than one would hope - probably due to the length of untwisted pair drop-wire - they can be masked by some other unusual behaviour. Some of it is that unusual, it doesn't follow any pattern of anticipated behaviour, although if the reason for it (eg. a source of interference) is discovered, then the cause of behaviour maybe obvious.
First if we take a look at one of the more frequent events - the most recent of which was yesterday morning Weds.19th ~1045, a similar one Sun.16th ~1240, also Sat.15th ~1140.
To me these give the impression of something electrical/electronic being switched on and is giving out interference. The interference gradually increases as the equipment "warms up" - that's an expression which doesn't necessarily mean physically getting hot - although it does often involve components getting warm/hot and their characteristics changing. Capacitors are an example of something whose characteristics can change without it necessarily seeming to get hot.
Anyway, explanations aside, can you think of anything that may have been switched on on these occasions (and obviously left on for some time).
This could be anything from electric motors continuously running (ie.not fridges etc), to Discharge lighting of any sort - Sodium, (compact) fluorescent, Metal Halide & so on, TVsets, Sky boxes and the like, anything with a plug-in Power Supply unit such as Phone chargers, or even electronic battery chargers - and this won't be a complete list.
Whatever may not be in the house, it could be in an adjoining/nearby building, garage, workshop etc. it might require a little bit of observation/detective work/intuitive guesses if not on your property, but somewhere nearby.

[#13]

Another significant event that's occurred 2-3 times, the last was in the early hours of this morning Thurs.20th ~0324, before that very similar Weds.19th ~2012, and a very similar one on Sat.15th ~0306. Now those in the early hours I guess must be automated in some way, which suggests all 3 may be. Can you think of anything that might fit this infrequent pattern?

[#14]

Quote from: Anotherone

Can you think of anything that might fit this infrequent pattern?

I cannot think of anything over which I have any control... there is a train station nearby running diesel electric trains... nothing which fits the random nature of the data, though... and there are some electricity transformers within about 500 yards...
As indicated in message #125, a downward spike in the upstream data is when an incoming phone call is answered...
BTW speedtests consistently return about 1.27 Mbps and...
'For your connection, the acceptable range of speeds is 0.8 Mbps-2 Mbps.
IP Profile for your line is - 1.51 Mbps'
Graph no. 73: 20 Nov,06:30-08:30
Graph no. 74: 20 Nov,08:30-10:30
Graph no. 75: 20 Nov,10:30-12:30
Graph no. 76: 20 Nov,12:30-14:30
Graph no. 77: 20 Nov,14:30-16:30
Graph no. 78: 20 Nov,16:30-18:30
Graph no. 79: 20 Nov,18:30-20:30
Graph no. 80: 19 Nov,16:45 -- 20 Nov,21:28
Router Stats @ 21:35
Uptime: 1 day, 5:17:22
DSL Type: ITU-T G.992.5
Bandwidth (Up/Down) [kbps/kbps]: 444 / 1,714
Data Transferred (Sent/Received) [GB/GB]: 4.49 / 18.96
Output Power (Up/Down) [dBm]: 12.0 / 16.6
Line Attenuation (Up/Down) [dB]: 37.6 / 67.5
SN Margin (Up/Down) [dB]: 11.0 / 8.6
System Vendor ID (Local/Remote): TMMB / ----
Chipset Vendor ID (Local/Remote): BDCM / TSTC
Loss of Framing (Local/Remote): 44 / 0
Loss of Signal (Local/Remote): 5 / 0
Loss of Power (Local/Remote): 0 / 0
Loss of Link (Remote): -
Error Seconds (Local/Remote): 57,963 / 11
FEC Errors (Up/Down): 3,156 / 1,115,847
CRC Errors (Up/Down): 76 / 24,316
HEC Errors (Up/Down): 149 / 21,187

[#15]

Can we clarify - that's not an electrified line is it? Is there any maintenance work being done on that line at night?
I'm talking about the downstream interference and there are events with two separate and different  "characteristics" to which I referred in my previous two posts. I'm not referring to the upstream spikes. It's not a case of whether you have any control over it, just attempting to identify any possible sources. Whether it would be possible to do anything about it may depend on what it is.
I doubt the electricity transformers will be a specific problem, however as I assume you are in a rural location, how good is your electricity supply - do you suffer from cuts or dips in supply very often?
As for the BT speedtest, something clearly is not right which will have to be looked into.
I note today's graphs are showing a lot of disturbance on the upstream not previously seen! Have you tried a Quiet Line Test recently?
The last graph you posted would seem to be a compilation of the last day and a bit.
Some of the disturbance on the Upstream today looks very similar to cross-talk possibly from a line where someone is having a problem with their broadband and is switching on and off periodically and/or rebooting now and again. You mentioned a neighbour in one of your posts yesterday.. Are they having problems with their broadband? - did you ask your neighbours if any had problem?