That is very good stuff
BreakingDad, I will look at it again tommorrow maybe (I am running on empty and getiing hits from all sides... I have not even showered for 3 days now)...
I did manage to get the RT-AX86U upstream from the BT SM21 with VoIP passing right through, but then teh Internet got shut off (I cannot quite remember whym but it could have been as the Setup I used for the RT-AX86U was for AP...
But it showed that the VoIP DECT Handset could pass through through the BT SH2 with RT-AX86U acting as a kind of Gateway upstream, with Voice Calls going fine both ways (Up and Downstream). I even had my Mobile Phone using "Signal" App and using the VoIP DECT Handset to make and receive Calls, but then my Desktop just clammed up (Which was weird, considering Data passed through my Mobile Phone via the Router/s)/
I was all over the settings today and Factory Reset so often that it has become the thing I spent doing most the last 2 days...
Hopefully I can shower some time, get something solid to eat (Fat Chance of that happening - it will be Crips and Yoghurt for Brunchinner ~ lol)
I am paste - thanks a million chaps. I thought I had the win today, but lost it all again as I needed to Factory Reset as I cannot recall what I did moments before (Terrible Short Term Memory here).
I hope you all have a really good rest and day ahead.
Thank you so much for all you do and your time!