Does anyone know if phones at a remote location behind a SBC will fallback to Direct SIP / STUN if the SBC is unavailable? I am monitoring the firewall of the remote location and see that the phones appear to be connecting directly to the 3CX PBX via port 5060 even though they are configured to use the SBC which is installed locally. I also see the SBC connection in the firewall too. Just not sure why I would see the phones directly connecting as well. Any thoughts?