... that can be used to convert any standard USB port (USB 2.0 – backward compatible) into two RS ... grade design, adds two RS-232 ports to USB port, compatible with MDT,PND.• FTDI 232BL single ... RX, RTS, CTS, DTR, DSR, DCD, RI, and GND.• Data transfer rates from 300 Bps to 921,600 bps ... Win CE, Mac, and Linux. Industrial Grade, FTDI solution,USB to Dual RS232 converter / adapter /serial cable, applicable ...