Your PPPoE login credentials should already be visible in the TTB router. On mine its
and entering the above into any third party router works for me. Yours might be in the format of <linenumber>@talktalkbusiness.net but whatever it is, the same credentials should work on any other router.
Not surprising the TT wifi hub appears to give you a better wifi signal than your Asus RT-AC68U, the TT kit is a 4x4 router whilst the Asus is only 3x3. If you can live without the firmware features of the Asus then I suggest you use the TT wifi hub, primarily for better wifi.
TalkTalk Business Fibre 900 -- Netgear RAX200
Edited by Highland76 (Wed 18-Nov-20 21:24:22)