Hi
I could be wrong sorry, as I’ve read this thread but getting slightly confused
If I read it correct, the rj11 for both cables work on netgear but not on tp, where both rj11 used does not allow the tp to sync
If this is correct, it will be the rj11 cable (probably a single pair), which are on the wrong pins
Try a full twin pair rj11, or change the pins wired to those that are not. Some use inner and some use outer (ie 14, 23)
As I say, could be wrong but have seen this over the years
Many thanks
John