The above was only the beginning. I have most of the issues stamped out now, but there are a couple of remaining ones and they are tricky. One way audio and/or outbound calls that drop after 30 seconds (due to incomplete NAT router traversal issues). I'm learning to love the Session Initiation Protocol and its friends, along with the Microsoft Message Analyzer (my beloved Microsoft NetMon 3.4 is end-of-life and has display problems on my dev system with the beefy nVidia video adapter).