This usb to serial converter allows you to connect a rs 232 serial device such as a modem to a usb port on your desktop or laptop pc compliant with usb 11 specifications supports rs 232 serial interface supports up to 500kbps data transfer rate detects usb suspend condition compliant with windows 7vistaxp2000me98se and mac os 101106 install as a standard windows com port full rs 232 modem control signals rs 232 data signals txd rxd rts cts dsr dtr dcd ri gnd supports bus pow