We are upgrading our PBX system to the latest FreePBX v14 edition. We made some test phone calls this morning before office hours. We noticed in the trace when we make a call EXT->INT our PBX server's IP is sending out a '500 Internal Server Error' to our providers IP. The call doesn't go through whatsoever. However, when we make a call INT->EXT we don't receive that 500 message and the call goes through successfully. Also, I turned on the SIP debug setting on in the Asterisk CLI, and we had noticed once again, when we make a call EXT->INT, in the CLI we receive an ERROR, however, we didn't receive that error when making a call INT->EXT. It's like our server is not allowing an incoming call from the outside world.
Contents from sip_general_additional.conf:
I'm not sure why we are sending out the 500 message?
Any ideas, please.