@anarcat please note that the domain quoted is the manufacture of the chipset and SFPs.
So it isn’t phishing and may be a geniue offer for help.
Seeing that my first attempt to get in touch with Metanoia resulted in a zero response so far I’m happy to take this as a positive sign and give it a go.
Note that there is a 2nd thread VDSL SFP Bridge Modem as mentioned by benedikt before.