The following should work just fine for those connecting via freeswitch.

<gateways>
<gateway name="nurango">
<param name="realm" value="your.company.realm"/>
<param name="outbound-proxy" value="whos.cloudcalling.me"/>
<param name="username" value="user_xxxxxxx"/>
<param name="password" value="XXXXXXXXX"/>
<param name="register" value="true"/>
</gateway>
</gateways>

 

Sample TLS Config (your_sip_interface.xml)

##<-- TLS -->
<param name="tls" value="true"/>
<param name="tls-sip-port" value="5061"/>
<param name="tls-cert-dir" value="/etc/local/freeswitch/certs"/>
##<<param name="tls-only" value="false"/>
<param name="tls-bind-params" value="transport=tls"/>
<param name="tls-version" value="tlsv1.2"/>
<param name="tls-bind-params" value="transport=tls"/>
<param name="tls-passphrase" value=""/>
<param name="tls-verify-date" value="true"/>
<param name="tls-verify-policy" value="none"/>
<param name="tls-verify-depth" value="2"/>
<param name="tls-verify-in-subjects" value=""/>
<param name="tls-version" value="$${sip_tls_version}"/>-->