This is an example of a moderated, recorded conference call

moderator.xml

<Response>
   <Dial action="recording_hook.php">
      <Conference startConferenceOnEnter="true" endConferenceOnExit="true" record="true">DrPepper</Conference>
   </Dial>
</Response>

participant.xml

<Response>
   <Say>This conference will not begin until that guy with the
         glasses on presses the magic button.</Say>
   <Dial>
      <Conference startConferenceOnEnter="false" waitUrl="http://twimlets.com/holdmusic?Bucket=com.twilio.music.classical&amp;Message=please%20wait">DrPepper</Conference>
   </Dial>
</Response>