I'm still have the trouble, but in all fairness, I have to claim some responsibility. I am running on an Asterisk system, and it's only failing with certain numbers, one of which being my personal cell phone...

Support asked me to put my Asterisk system in my DMZ and to disable iptables. Those suggestions are very understandable from a troubleshooting perspective, but I'm not too keen on having an Asterisk system wide open on the net. (at least, not without more research on my part in terms of security).. My troubleshooting solution? I put my BYOD creds into my PAP2, and calls to my cell phone went just fine. Put everything back to Asterisk, and the call to my mobile failed again.

Support had closed my ticket (new automated script?) since I didn't respond within 48 hrs of their last communication, which is OK by me at this point. The trouble I'm having is outside their reasonable level of support (BYOD problems). I'm hoping I can figure out where the problem is in these calls, because I like the setup I have.