Check out Open H.323. See if you can get OpenPhone to work to connect two Windows machines together. Or one Windows machine and one OSX machine.
Last night I tried this, and failed. I even tried Netmeeting <-> ohphonex (the OS X client), and it connected — but no audio/video packets were transmitted. (Don’t tell me to try Netmeeting <-> Netmeeting on two windows machines.)
This is insane. Open H.323 has been around for years now, I would have figured they would have implemented the damn thing correctly by now. That it would at LEAST work for the same program communicating between two different computers. On the same platform no less!
But it doesn’t. And I can’t figure out why. Not even with both sides not using any NAT or firewalls.
The only telling sign: incoming connects say they’re coming frommy IP instead of the remote side’s IP. Attempted connects say that the other side “refused” my call.
I give up…