Does what it says on the box: I can communicate between two PCs with this cable and a DB9 connector on another PC. I'm writing a telecom program and needed to be able to debug the program on my PC and another physical device. I was able to connect reliably at speeds up to 230 Kbps. It's twice as fast as 115 Kbps on a PC with a hardware UART, so I'm happy with that. As others have said, this is connected as a NULL MODEM or DCE device. In most cases this is not the cable you need and you will need a DTE connector. This is for connecting two computers, not for connecting a computer and a modem.
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