I’ve recently purchased a RB2011L-IN router and noticed this version doesn’t have the RS232/RJ45 port populated, does anyone know the PIN layout so I can solder a RS232 port to it.
Thanks
In addition to this, I realise that there is no chip populated in U903, which looks like it should be a MAX3243C RS232 line driver? Is there no TTL I can take from anywhere on the board?