pbxnsip – The Default Domain
Before you can begin using the system, you must set up at least one domain. By default, the system installation creates one domain (pbx.company.com) and associates localhost as alias to it. The localhost domain will match all requests that cannot be matched to a domain name within the domain list. This makes it possible to run the PBX on changing IP addresses without changing the name of the domain. This simplifies the setup of the PBX in environments where only one domain is needed. Thus, if you are going to have only one domain, the localhost would be a convenience and would be better left on the system than deleted.
