I have a few managers that like to take there phone home. How do i set this up. Do I need to make the phone provision through Remote Extension (STUN)??? I have made internal DNS which exactly the same to the external DNS. If i make the phone provision using Local LAN the sip doesnt register as it uses @ipaddress instead of the @dnsname if i go into the yealink phone and change the ip address to fqdn it works fine but i want all phones to do this in the provisioning.