Understanding the FreeSWITCH user directory

The FreeSWITCH user directory is based on a centralized XML document, comprised of one or more <domain> elements. Each <domain> can contain either <user> elements or <groups> elements. A <groups> element contains one or more <group> elements, each of which contains one or more <user> elements. A small, simple example would look like the following:

<section name="directory">
  <domain name="example.com">
    <groups>
      <group name="default">
        <user id="1001">
          <params>
            <param name="password" value="1234"/>
          </params>
        </user>
      </group>
    </groups>
  </domain>
</section>

Some more basic configurations may not have a need to organize the users in groups so it is possible to omit the <groups> element completely, and just insert several <user> elements into the top...