I have setup phone proxy with my Call Manager. The Phone registers fine with Call Manager and I am able to call offnet numbers and internal extension when using my proxy phone offsite but I have no 2 way voice. What could cause this? Maybe it is a MTA setup issue. Heck I am stuck.
I fixed the problem lastnight. It had somethting to do with the service provider and the way they provisioned my IP address. 2 of my 5 IP's do not work. That was the issue the whole time. I performed a couple of packet traces on my firewall and saw where the traffic could not transition the unit. Once I changed the IP's addresses I was using everything works as it should now. Thanks for the troubleshooting commands and I am sure they will com in handy in the future.