Thanks very, very much for those links.
This is quite a scary long list
https://support.aa.net.uk/VMG1312-B10A:_Bugs#Problem_ListBut I suspect that the list can be reduced down a lot if you are not using it as a router?
I saw one bug relating to badness in IPv6CP I think, which can be avoided simply by not getting the config info from ppp but hard-coding it, which is what I do anyway with my Firebrick.
I am not sure if there is something in there that might be a showstopper for me with modem-only mode. I'm getting pretty well scared off. It's impressive how cynical ZyXel is and how they refuse to fix any bugs, to force people to buy new kit perhaps? (I seem to have been incredibly lucky with my ZyXel WAPs given their ethics and attitude to software dev quality standards.)
@Lil-koby :
1) Yes IP-bonded three lines. The ISP does load splitting at their end at the individual IP packet level, not assigning TCP connections to lines, knows nothing about L4 protocols and a single TCP stream goes at triple speed. My own router does the same load-splitting for upstream traffic.
2.) No chance of getting any VDSL for the foreseeable if ever. If the USO ever happens and it actually turns out to be meaningful and useful, not just a con and an advert for satellite garbage, then we might possibly get a cab but then who knows it might even be FTTP if they have any sense at all, as everything would have to be done from scratch sending as there aren't any green boxes of any sort out here four miles from kind of civilisation.
3) I don't know what the hardware in the DSLAM/MSANs is now in the NSBFD exchange since they upgraded it to 21CN. I haven't dug around to have a look. (Was TI back in the old 20CN days of course which means absolutely nothing.) I don't suppose it's in some database somewhere?