Hi, We are trying to test with a new VoIP client and in an internal network. We need to configure the realm on the server to be same as the ip address of the local box. How can we do that? Currently the realm sent in the SIP packet is "3CXPhoneSystems" . Referred http://www.3cx.com/blog/docs/3cx-phone-system-parameters-table/ But the configuration parameter"SIPREALM" mentioned in the above blog post is not available in our GUI under 3CXC Management Console > Settings > Advanced > Customer Parameters tab. We are evaluating the trial version if it meets our requirements. Also, how do you configure the SIP authentication parameters on 3CXPhoneSystem server. Thanks..