The usb to db25 ieee 1284 printer cable by cables to go enables a parallel printer to be connected to a usb port on a pc or hub this is ideal for computers without a parallel port or in order to free up the parallel port for a zip drive or scanner if you have multiple printers you can eliminate the need for a switchbox by connecting each printer to a usb port the device is fully transparent to the user and is ideal for true bi directional communication