I am trying to setup an Aastra 6730i phone as an external extension through the 3cx Tunnel but getting no service. I have setup the 3CX softphone with no problems but cannot get it connected with the hardphone. Does anyone know what the follow settings should be (internal/external & ports). Both sides of the tunnel have static IP's and are there any other settings within the Aastra phone that need changed? The 3CX PBX has all default values (5090 etc.) Proxy Server Proxy Port Backup Proxy Server Backup Proxy Port Outbound Proxy Server Outbound Proxy Port Registrar Server Registrar Port Backup Registrar Server Backup Registrar Port Registration Period Conference Server URI Many thanks.