I have a freepbx box with a direct static ip address. All of my other extensions work perfectly, but I am having problems on my Nokia E66. It will register just fine, it will receive incoming calls, and can dials like echo test, do not disturb, etc. I can also make outbound SIP URI calls. When I program X-Lite with the same password and user name as the phone, I can make outbound calls without a problem.
I'm using Freepbx 1.4. I modeled my configurations off of these instructions:
I've been using FN with my E63 without issues, and I don't know what the source of your problems is. However, you can get more control over your Nokia SIP settings with their application, SIP VoIP settings: »www.forum.nokia.com/Tools_Docs_a···on.xhtml