When attempting to download the Java communications api from sun the only version available appears to be 3.0. It is not implemented for Windows as the older version is. Does anyone know how to get to an older version on Sun's site? The version that I need is for windows (XP). [ December 22, 2005: Message edited by: Larry Flood ]
Somewhere in there is what appears to be a real Sun person explaining why it isn't supported any more and I believe there are links to places where it has been "mirrored". You could consider using other people's implementations of the communications API (rxtx.org is the one you see mentioned most often). Those other people may have addressed the issues that Sun didn't want to.