freeswitch/conf/autoload_configs/conference.conf.xml

<!-- http://wiki.freeswitch.org/wiki/Mod_conference --> 
<!-- None of these paths are real if you want any of these options you need to really set them up -->
<configuration name="conference.conf" description="Audio Conference">
  <!-- Advertise certain presence on startup . -->
  <advertise>
    <room name="888@$${server_name}" status="FreeSWITCH"/>
  </advertise>

  <!-- These are the default keys that map when you do not specify a caller control group -->	
  <!-- Note: none and default are reserved names for group names -->	
  <caller-controls>
    <group name="default">
      <control action="mute" digits="0"/>
      <control action="deaf mute" digits="*"/>
      <control action="energy up" digits="9"/>
      <control action="energy equ" digits="8"/>
      <control action="energy dn" digits="7"/>
      <control action="vol talk up" digits="3"/>
      <control action="vol talk zero" digits="2"/>
      <control action="vol talk dn" digits="1"/>
      <control action="vol listen up" digits="6"/>
      <control action="vol listen zero" digits="5"/>
      <control action="vol listen dn" digits="4"/>
      <control action="hangup" digits="#"/>
    </group>
  </caller-controls>

  <!-- Profiles are collections of settings you can reference by name. -->
  <profiles>
    <!--If no profile is specified it will default to "default"-->
    <profile name="default">
      <!-- Domain (for presence) -->
      <param name="domain" value="$${server_name}"/>
      <!-- Sample Rate-->
      <param name="rate" value="8000"/>
      <!-- Number of milliseconds per frame -->
      <param name="interval" value="20"/>
      <!-- Energy level required for audio to be sent to the other users -->
      <param name="energy-level" value="300"/>

      <!--Can be | delim of waste|mute|deaf waste will always transmit data to each channel
          even during silence -->
      <!--<param name="member-flags" value="waste"/>-->

      <!-- Name of the caller control group to use for this profile -->
      <!-- <param name="caller-controls" value="some name"/> -->
      <!-- TTS Engine to use -->
      <!--<param name="tts-engine" value="cepstral"/>-->
      <!-- TTS Voice to use -->
      <!--<param name="tts-voice" value="david"/>-->

      <!-- If TTS is enabled all audio-file params beginning with -->
      <!-- 'say:' will be considered text to say with TTS -->
      <!-- Set a default path here so you can use relative paths in the other sound params-->
      <!--<param name="sound-prefix" value="/soundfiles"/>-->
      <!-- File to play to acknowledge succees -->
      <!--<param name="ack-sound" value="beep.wav"/>-->
      <!-- File to play to acknowledge failure -->
      <!--<param name="nack-sound" value="beeperr.wav"/>-->
      <!-- File to play to acknowledge muted -->
      <!--<param name="muted-sound" value="muted.wav"/>-->
      <!-- File to play to acknowledge unmuted -->
      <!--<param name="unmuted-sound" value="unmuted.wav"/>-->
      <!-- File to play if you are alone in the conference -->
      <!--<param name="alone-sound" value="yactopitc.wav"/>-->
      <!-- File to play endlessly (nobody will ever be able to talk) -->
      <!--<param name="perpetual-sound" value="music.wav"/>-->
      <!-- File to play when you join the conference -->
      <!--<param name="enter-sound" value="welcome.wav"/>-->
      <!-- File to play when you leave the conference -->
      <!--<param name="exit-sound" value="exit.wav"/>-->
      <!-- File to play when you ae ejected from the conference -->
      <!--<param name="kicked-sound" value="kicked.wav"/>-->
      <!-- File to play when the conference is locked -->
      <!--<param name="locked-sound" value="locked.wav"/>-->
      <!-- File to play when the conference is locked during the call-->
      <!--<param name="is-locked-sound" value="is-locked.wav"/>-->
      <!-- File to play when the conference is unlocked during the call-->
      <!--<param name="is-unlocked-sound" value="is-unlocked.wav"/>-->
      <!-- File to play to prompt for a pin -->
      <!--<param name="pin-sound" value="pin.wav"/>-->
      <!-- File to play to when the pin is invalid -->
      <!--<param name="bad-pin-sound" value="invalid-pin.wav"/>-->
      <!-- Conference pin -->
      <!--<param name="pin" value="12345"/>-->
      <!-- Default Caller ID Name for outbound calls -->
      <param name="caller-id-name" value="$${outbound_caller_name}"/>
      <!-- Default Caller ID Number for outbound calls -->
      <param name="caller-id-number" value="$${outbound_caller_id}"/>
    </profile>
  </profiles>
</configuration>