Hello, I am currently evaluation 3CX before making the transition from Elastix. I have configured the system and done all of the port forwarding on the firewall, and ran the Firewall Check, and everything passes. Audio works fine with incoming calls and calls between extensions, but there is absolutely no sound when making outbound calls. The outbound calls go through, and you can answer the call, but there is no audio in either direction. I am testing with the Iphone App and the desktop App. Any help would be greatly appreciated.