The FTDI USB to Null Modem Serial Adapter Cable converts an available USB 1.1 or 2.0 port into an RS232 Null Modem Serial DB9 port, allowing DCE/DTE conflicts to be resolved directly without the need for additional crossover serial cables or adapters. This compact adapter features COM port retention, which automatically preserves the COM port values after the cable is unplugged and reinserted into the host computer. The same applies after a system restart. The integrated FTDI chipset supports additional user customizations, advanced features, and compatibility that may not be offered by other solutions. The USB to Null Modem Adapter is compatible with a range of operating systems, including Windows, Windows CE, Mac OS, and Linux, making integration into mixed environments easier.