Thank you! Found the _NO-DSL-FIRMWARE file. Haven't managed to test it so far because I don't have access to the router at the moment but will give it a try at some point and let you know if there are any problems. Cheers!
The only other weird thing I've noticed is that my DSL light is off on the front of the router, but the internet is working fine, speed is fine, and the DSL link in the router firmware is ok (as expected running the 1.0.4.9 build). This might be another red herring and it's not something I'd...
Ah, maybe it's not the Turk Telekom setting then; I just remember that being an oddly specific setting and saw you were on that provider. I have it disabled, so if you had it enabled and me not, I think we can rule that out as a potential cause. Back to square 1.
My settings are similar to...
Do you think this is the issue? Have you tried this setting in Administration > DSL Setting > Country/ISP setting? I've not tried it as it didn't seem relevant to me as I'm nowhere near Turkey, but who knows!
To fully test this, one of us would have to go back to DSL firmware 1.0.5.3 and...
I'm in the Channel Islands (outside the UK), and my ISP is JT. I think I'm connected to a Huawei cabinet if that's helpful (based on the ones I've seen around), though I don't know for sure. They didn't specify any particular settings to configure so I've left most as default -- I can ask them...
I had a strange issue with my DSL-AC68U and thought I'd make a thread in case anyone was experiencing the same. Can't say it's solved, but there's a workaround for now.
The issue is very similar to that described by @my_bey in this thread. I use my DSL-68U as a modem/router on a VDSL2...