OK, so I need to replace the RJ45 link socket on a Denon SC6000.
After searching Mouser, I came up with this which is an identical size and footprint.
https://www.mouser.co.uk/ProductDetail/960-TMJ0162GDNLOnly it doesn't work (and the right yellow LED is the opposite polarity of the original)
A bit of Googling the data sheet shows the pinouts are clearly not compatible with the Denon configuration you can see in the photo of the PCB.
https://www.taoglas.com/datasheets/TMJ0162GDNL.pdf. Section 4.1 shows the pinout.
The Denon has I presume 4 pairs of data lines.
Now this is when I realise that I don't have a clue about any of this, the RJ45 is not the Universal connector I presumed it was, and I'm not even that sure what T10/100 base blah blah is either.
So the question is, what should I actually be looking for in my Mouser (etc) search parameters?
What are Denon doing here?