Agh! I'm posting this to help comfort others who might suffer from the same problem, and to help me vent my frustration.
My line usually syncs at 80/20 with no interleaving and I typically get top-notch download and upload speeds from real-world and speedtest results.
But after installing some buggy firmware on my router (with integrated VDSL modem), resulting in lots of reboots, I've been what I describe as "DLMed back to the Stone Age".
Well, it isn't quite that bad, but it is still horrible.
I'm now syncing at between 60 and 70Mbit/sec down, with a current IP Profile of 68.xMbit/sec but with Interleaving on
And Upstream is completely borked - 4Mbit/sec max, interleaved of course.
Ping times have jumped from 20-ish to 49ms.
It is an absolute nightmare. I've switched to the OR modem as I'm still struggling with firmware issues on the router, but it hasn't made any difference. DLM in action I guess.
I can't give actual stats with the locked OR modem . but you get the general picture of my woes I'm sure.
Anyway, here's hoping things will return to normal.
It is the not knowing that's the killer.
Could some nasty noise source have introduced itself at exactly the same time as I happened to be updating the firmware and rebooting? Am I stuck at these "Stone Age" speeds for the rest of eternity (or 2025 when we might get FTTP hehe)? If I knew there was light at the end of the tunnel it wouldn't be so bad. But as it is I'm in limbo until ... well, whenever DLM decides to be nice to me again.
Copper-based xDSL is great -even miraculous- when it works, but when things go wrong it can be a nightmare.