https://lede-project.org/toh/hwdata/netgear/netgear_dgn3500b
if you scroll to the bottom and click "Conventions per characteristic" there is more details
@fipebo "Conventions per characteristic" are not describing any device, but give general info what values are expected in the dataentry. All devices have the same "Conventions per characteristic".
Tp-link TD-W8970 definitely works well with LEDE, I keep it working with >30d uptimes more than 5 month on ADSL2 AnnexA line. But be careful not to buy unsupported v3 version.
It just is important to note that the BT HH5a only supports annex A while doing ADSL operations, it can't do annex B (which mostly matters in germany, most of the world uses annex A).
The older BT Homehub 2B supports both annexes (personally tested in annex A and B countries). In fact I'm writing this message connected to this router.
(Passive) high-pass frequency filters on the PCB. Multi-annex routers provide them for all supported frequencies, but the BT HH5a is only targetting the british market (annex a), so saving 2 cents makes the cut.
Thanks @slh for reply but your explanetation does not makes sense.
Hightpass will only work for separating Annex B from A because the Annex A range starts under them from Annex B
Or did I miss something ?
And why will the producer saving 2 cents because they need minimum 2 elektrical components more ?
Really curios, I think is that some VR9 modells can do Annex B/J and some Annex A.
Is it possible to test it, if i not have an ADSL line ?
Side note: When you want to use VDSL or VDSL-Vectoring, then it does not matter any more if on the ADSL side the device was made for Annex A or Annex B.
In the XRX200 based devices you can solder them from Annex A to Annex B and also the other way around.
I would recommend to always go for xrx200 based devices. Also when not needing VDSL or even VDSL-Vectoring functionality. They are very stable on ADSL and VDSL lines.