I am very new to VOIP, and I come from Anolog PBX’s, but I can not figure out what I am doing incorrectly.
My setup is FREEPBX, Asterisk running in a Virtual machine, and then there are two firewalls on our network that I have for testing purposes fully open and forwarding all TCP & UDP ports to the asterisk IP.
I am able to call in and out from a Internal soft/hard phone to Any extension I setup and it works perfectly internal or external, but I can not call from a EXTERNAL to an EXTERNAL.
The phone rings and I can pick it up, but there is no audio at all, then after about 6 seconds of no audio the call is automatically disconnected. I tried Enabling nat and disabling, both give identical behavior.
Any idea’s on what to try, and PLEASE talk to me like a know nothing, because … well, I know nothing:)
Also just a note there are no trunks setup or anything, just two sip extensions for testing and that is it with the absolute minimal configurations.