Usb Serial Websites:
rs485.com
R.E.Smith Serial Communications RS485 RS232 RS422
R.E.Smith serial communication products is your rs485 rs232 and rs422 authority for converters, repeaters, microprocessors, fiber optics, ethernet serial port server,...
byterunner.com
USB Serial Adapter, Audio, Extension Cable, VGA Video Splitter, PS2
Your source for computer connectivity devices: Serial Cards, Parallel Cards, USB and FireWire Cards, USB to Serial Port Adapters, USB to Audio Adapters, Video Splitters, USB to...