LS220D Serial interface

After some research I actually found the serial interface connections on the Buffalo LS220D.  Discussion and Datasheets over here: https://github.com/1000001101000/Debian_on_Buffalo/issues/52

The image is copyright free to use!

For logfiles or the full res image: https://drive.google.com/drive/folders/1rYEgoIc2LDBapYcMtrX-bgB10CaHhF_L?usp=sharing