does anyone know what the pinout is for the 8P8C serial port on IBM Power System servers (specifically it is compatible with IBM part number 46K5108, which is absurdly expensive for a passive adapter so I don't want to buy it)? it does not seem to be the standard EIA/TIA-561

it is really frustrating to spend an entire day trying and failing to do something (get serial port output from this thing)

I think I will just buy the overpriced IBM serial adapter cable. I've run out of other ideas to try, nobody else seems to know the pinout. If I'm right about it just being a nonstandard pinout and it works then I can figure it out with a multimeter and publish it on the internet so no-one else has to buy the overpriced adapter. If I'm wrong and it still doesn't work then I can return the cable (... and I'm still stuck with a massive £500 30kg server that doesn't boot)