#1 Enter your SIP account informations, the account login is used for "Displayname", "Account" and "Authentification Username".
#2 Enter the password in "Password".
You can find all of your SIP account informations from the "Telephony" menu in "My line / Clicktocall" or from the "Lines management" tab in each user's profile.
#3 Enter the server's IP adress in "Registrar", do not forget the "6070" port.
You might have to add this same adress in "Outbound proxy", it depends on your network configuration, we recommend not to use this setting in the first place.
#4 Click on "Apply" and save if asked by the interface.
Go to the "NAT" tab.