Serial port to USB converter PCB for Linksys WRT54G/GS/GL/… wireless access points. There are two serial ports on the WRT54G series. This PCB has jumpers to select between the first and second serial port. This converter uses FTDI's FT232BM serial-to-USB converter.
Schematic and Layout available for download in Eagle 4.1 format (http://www.cadsoft.de) here: :wrt54-usb_eaglefiles.zip