3CX hosted in Google taking advantage of the year free licence. Twilio setup for their SIP Trunk offering. Able to receive calls but not make them. Trunk is not registering correctly. Logs show: Registration at Twilio has failed. Destination (sip:firstname.lastname@example.org:5060) is not reachable, DNS error resolving FQDN, or service is not available. I am able to ping the fqdn successfully from the terminal. I see another user with the same error and some redit detail around an issue between Google and AWS (where Twilio host their sip trunks). Does anyone know how to get this working?