i recently moved into a new build with FTTP.
The house has been wired with Cat6e throughout, including to two Telephone points which both feed back to a cupboard with the OTN box.
My layout is;
Openreach OTN to Cat6 wall module wih a BT to Cat6 RJ45 cable.
The Cat6 between the wall module and telephone point is connected with one of the 4 pairs. (Blue/Blue+white).
The phone then connects over a normal phone cable.
However.. it doesn't work..