I was curious to see recent ones rather than old ones (btw - i think you can get these from dslstats rather than having to run scripts if its easier).
Whilst Ive been 'reading SNR' graphs for years, the art of reading hlog and qln graphs is fairly recent event as until a couple of years ago hardly any routers provided this information. I think its fair to say that even most telecom engineers with a JDSU dont even know how to interpret the results.
None of us here know it all and we share and contribute as best we can in the areas that we feel most competant. B*cats knowledge on electrics and impedance far outweighs mine, so I will bow to his knowledge when it comes to those topics.
We do know that hlog shows he physical characteristics of the copper path, but to me, that jaggedness in the latter tones would seem to indicate that even if your ISP hadnt disabled tones @ 1.8 - 2 Mhz then you would still be picking up interference from some RFI in the area somewhere.
I wont profess to fully understand what is going on at around tone 50 on your line. But as mentioned this is an area that is heavily affected by PSD masking & power cut backs.. and in that particular frequency then various different masks are applied that are based on line length and location. Here in the UK you could have 5 different lines on the same DSLAM with the same ISP and their PSD masks & powercut back could all be different.
Having seen your attenuation per tone in the other thread
here also made me think that there's possibly some power cut back going on in that area. Not only are tones up to 60 a cross over region from upstream and downstream the later end is a crossover area with Annex_M and why they always on good lines show as a nice inverted 'U' shape.
So the thing is that although hlog shows the physical characteristics, it is also affected by any power cutback thats been applied too.
Again as mentioned the tones at around 200 when you see a shallow dish that rises again at 250 imply crosstalk from adsl1 lines, but Im not sure how (or even if it would) show on a hlog file. QLN is the one that helps identify crosstalk. Note how lovely and quiet your line is in the region where your ISP has disabled the tones... thats because hardly any data will be transmitted across those tones on the dslam.
The QLN will almost always show some jaggedness, crosstalk cant be avoided, but it will also ebb and flow as more come onboard the dslam causing 'shallow dish or bowl' shapes.
As an example look at my own line QLN.. see how in the first graph how I had a fairly smooth decline? In the 2nd graph, now that Im beginning to see the effects of cross-talk, look how you start to see those shallow dish shapes appearing.
What I dont really see in any of your graphs is anything that your telco provider would be likely to fix, but if it comes down to the fact that there is a tiny bit of impedance on the line, or that different lengths of copper may be different gauges.. then no teleco is going to be ripping out wires that otherwise are functional. There are millions/billions of lines around the world and I should imagine its rare to find one that is 100% perfect. If the telco had to replace all the lines that showed some sort of small anomalies which werent really affecting the overall performance, when there are lines that had serious errors that remain unfixed... it would be cheaper to replace with fibre than copper.
On the whole your line looks good. Your SNR is damn good, you have some crosstalk, your ISP has blocked a range of frequencies which are troublesome. No its not perfect, but generally speaking its pretty good. If that line were mine, I'd be more worried about the errors being generated and Id up my target SNRm up to 3dB. I'd also be changing that doorbell bell wiring of yours before you can expect a telco to go ripping up cables in the ground
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ETA
oops forgot the attachments.
