<include>
  <gateway name="{{ bbb_sip_provider }}">
    <param name="proxy" value="{{ bbb_sip_provider }}"/>
    <param name="username" value="{{ bbb_sip_username }}"/>
    <param name="password" value="{{ bbb_sip_password }}"/>
    <param name="extension" value="sip01"/>
    <param name="register" value="true"/>
    <param name="context" value="public"/>
  </gateway>
</include>