After my attempt to Connect with the 'outside' SIP line, I did notice in the log the following: [DEBUG] sofia.c:8732 IP <my SIP IP here> Rejected by acl "domains". Falling back to Digest auth. With that in mind, and going by what I had read before, I edited the conf/autoload_configs/acl_conf.xml file and made the following entries <list name="lan" default="allow"> <node type="allow" cidr="<my SIP IP here>/32"/> </list <list name="domains" default="deny"> <node type="allow" cidr="<my SIP IP here>/32"/> <list> But I still got a BUSY on the next attempt. And the freeswitch.log is still showing: [DEBUG] sofia.c:8732 IP <my SIP IP here> Rejected by acl "domains". Falling back to Digest auth. What am I still missing? Thanks