Yes, the default port 5190, I am told, is blocked by the local ISP. I have been using Port 13 for several years, now and it works fine.
However, I am not able a/v chat and get the infamous "insufficient bandwidth, blah blah blah…" error message. I have checked various support forums and help sites and tried all the suggestions without any luck.
Anybody else here facing similar issues? I think the problem is with the ISP not enabling the QOS technology or something to that effect.
Also see:
http://docs.info.apple.com/article.html?artnum=301641 http://docs.info.apple.com/article.html?artnum=301050 http://www.macworld.com/news/2005/08...ysis/index.php http://www.ralphjohnsuk.dsl.pipex.co...3mockblog.html http://www.mvldesign.com/video_conference_tutorial.html