This week's book giveaway is in the OCMJEA forum. We're giving away four copies of OCM Java EE 6 Enterprise Architect Exam Guide and have Paul Allen & Joseph Bambara on-line! See this thread for details.
First off, please ease up. Every question on JavaRanch is urgent, at least to the person asking it. Next, I'm not quite sure what you mean. IP (Internet Protocol) is a network protocol. It has nothing to do with parallel ports. The Comm API is designed to be run locally and access local ports. If you are attempting to run it through a computer's network connection, I think you are out of luck.