Hi, I have a new Yealink T46 in our LAN that I want to register to our hosted 3CX (V15). It does not work. I have set up the extension and set to use it with STUN. (Direct SIP). I have set the Signalling Port 5060 and forwarded it to the lan IP of the phone 10.1.2.186. Also the port range of 14000-14004 was forwarded. Outbound I have forwarded the internal IP to the LTE Gateway. You finden some screenshots here: The settings of the extension: https://s16.postimg.io/t1soau0a9/extension.png[/img] NAT, forwarding Signalling and RTP Ports The settings of the provisioning: The settings of the yealink Has somebody an ideas what was configured wrong? Thank you I.