Sorry, I should have added that I'm not from the UK, but from Hungary. I know that this forum is aimed at UK related networking topics, but hopefully, I'm not breaking any rules with my post.
My ISP is the old PTT (it was a 100% state owned company, with full monopoly) and such they own the whole network, so they should be able to change it if they are willing.
I just don't know what exact changes should I ask for, given that I will probably only be able to get them change it once, and then they will tell me to get lost. The ideal solution would be to fine tune it, but getting to an engineer who actually understands the problem and willing to help is not easy, especially after you admit to the Level 1 support that the internet actually works and there are no red lights on the modem. Based on previous experiences, I can ask them to change specific things, but just asking them to investigate and improve on something will lead nowhere.
I'm pretty confident in my networking knowledge, but this is a rather specific topic with no real possibility of trying different things out and maybe even making compromises for lower latency. If possible, I would still like to try and improve my connection as I think they are overly cautious with their settings, most likely because they try to push consumers towards IPTV (which I'm not using).
Also, given that VDSL is different from the older ADSL standards in that they are not changing the above mentioned values, but rather DLM profiles which just further complicates things. I'm pretty sure, that I can ask for a reset, but not for a specific profile. However, if they would to ask for one, I would be glad if anyone could offer some help (based on the pretty scarce info I provided above).
Edit: the noise is most likely due to my distance from the DSLAM. However since they are only offering 30/5 mbit (fixed offer, not tied to my location) and I'm still on 17a so that makes me think that there is still some room for improvement. And yes, the SNRM could be better.
Ps.: Have a good night and get better! :-)