6. Now click the “Telephony” link on the left side of the page and "SIP". This will show the SIP
configuration page. Enter the IP or FQDN of the 3CX server in field "SIP Registration Server
Address" AND "SIP Domain" - even a SIP Domain can never be an IP you must enter the IP or
FQDN or your server. Otherwise 3CX does not handle the call going outside although the