I am working through a conference module problem I am having.  I have a simple dialplan implementation that answers an incoming call, plays a prompt, and then connects the call to a conference.  Initially, I would dial in on two clients (one PSTN/SIP gateway and the other a SIP client on my laptop).  The freeswitch console messages indicate the calls would connect to the conference but I heard no voice path.  I have been working on it this morning and simplified my dialplan to the following.  I have not modified the 
conference.conf.xml and I am using the default values.&nbsp; What I am experiencing now is a tremendous amount of echo.&nbsp; Any pointers on what the issue might be?<br><br>Jonathan<br><br>Here is my dialplan:<br><br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;action application=&quot;answer&quot;/&gt;
<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;action application=&quot;sleep&quot; data=&quot;1000&quot;/&gt;<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;action application=&quot;playback&quot; data=&quot;/usr/local/freeswitch/sounds/PlumbleIntro.wav&quot;/&gt;<br><br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;action application=&quot;conference&quot; data=&quot;airespring&quot;/&gt;
<br><br><br>Here is the freeswitch output:<br>call number 1:<br>2007-12-10 11:40:38 [NOTICE] switch_core_state_machine.c:135 switch_core_standard_on_execute() Execute conference(airespring)<br>2007-12-10 11:40:38 [DEBUG] mod_conference.c:4439 conf_default_controls() Installing default caller control action &#39;mute&#39; bound to &#39;0&#39;.
<br>2007-12-10 11:40:38 [DEBUG] switch_ivr.c:1095 switch_ivr_digit_stream_parser_set_event() max len 1<br>2007-12-10 11:40:38 [DEBUG] switch_ivr.c:1099 switch_ivr_digit_stream_parser_set_event() min len 1<br>2007-12-10 11:40:38 [DEBUG] mod_conference.c:4439 conf_default_controls() Installing default caller control action &#39;deaf mute&#39; bound to &#39;*&#39;.
<br>2007-12-10 11:40:38 [DEBUG] mod_conference.c:4439 conf_default_controls() Installing default caller control action &#39;energy up&#39; bound to &#39;9&#39;.<br>2007-12-10 11:40:38 [DEBUG] mod_conference.c:4439 conf_default_controls() Installing default caller control action &#39;energy equ&#39; bound to &#39;8&#39;.
<br>2007-12-10 11:40:38 [DEBUG] mod_conference.c:4439 conf_default_controls() Installing default caller control action &#39;energy dn&#39; bound to &#39;7&#39;.<br>2007-12-10 11:40:38 [DEBUG] mod_conference.c:4439 conf_default_controls() Installing default caller control action &#39;vol talk up&#39; bound to &#39;3&#39;.
<br>2007-12-10 11:40:38 [DEBUG] mod_conference.c:4439 conf_default_controls() Installing default caller control action &#39;vol talk zero&#39; bound to &#39;2&#39;.<br>2007-12-10 11:40:38 [DEBUG] mod_conference.c:4439 conf_default_controls() Installing default caller control action &#39;vol talk dn&#39; bound to &#39;1&#39;.
<br>2007-12-10 11:40:38 [DEBUG] mod_conference.c:4439 conf_default_controls() Installing default caller control action &#39;vol listen up&#39; bound to &#39;6&#39;.<br>2007-12-10 11:40:38 [DEBUG] mod_conference.c:4439 conf_default_controls() Installing default caller control action &#39;vol listen zero&#39; bound to &#39;5&#39;.
<br>2007-12-10 11:40:38 [DEBUG] mod_conference.c:4439 conf_default_controls() Installing default caller control action &#39;vol listen dn&#39; bound to &#39;4&#39;.<br>2007-12-10 11:40:38 [DEBUG] mod_conference.c:4439 conf_default_controls() Installing default caller control action &#39;hangup&#39; bound to &#39;#&#39;.
<br>2007-12-10 11:40:38 [DEBUG] mod_conference.c:4175 conference_function() Raw Codec Activation Success L16@8000hz 1 channel 20ms<br>2007-12-10 11:40:38 [DEBUG] mod_conference.c:4214 conference_function() Raw Codec Activation Success 
L16@8000hz 1 channel 20ms<br>2007-12-10 11:40:38 [DEBUG] mod_sofia.c:810 sofia_receive_message() De-activate timed RTP!<br>2007-12-10 11:40:38 [DEBUG] switch_core_session.c:339 switch_core_session_receive_message() Kill <a href="http://sofia/default/17476338055@proxy01.sipphone.com:5060">
sofia/default/17476338055@proxy01.sipphone.com:5060</a> [BREAK]<br>2007-12-10 11:40:38 [DEBUG] mod_conference.c:1531 conference_loop_output() setup timer soft success interval: 20&nbsp; samples: 160<br>2007-12-10 11:40:38 [DEBUG] mod_conference.c:724 conference_thread_run() setup timer success interval: 20&nbsp; samples: 160
<br>2007-12-10 11:40:38 [DEBUG] switch_core_io.c:292 switch_core_session_read_frame() Engaging Read Buffer at 320 bytes<br><br>call number 2:<br>2007-12-10 11:44:00 [NOTICE] switch_core_state_machine.c:135 switch_core_standard_on_execute() Execute conference(airespring)
<br>2007-12-10 11:44:00 [DEBUG] mod_conference.c:4175 conference_function() Raw Codec Activation Success L16@8000hz 1 channel 20ms<br>2007-12-10 11:44:00 [DEBUG] mod_conference.c:4214 conference_function() Raw Codec Activation Success 
L16@8000hz 1 channel 20ms<br>2007-12-10 11:44:00 [DEBUG] mod_sofia.c:810 sofia_receive_message() De-activate timed RTP!<br>2007-12-10 11:44:00 [DEBUG] switch_core_session.c:339 switch_core_session_receive_message() Kill sofia/default/+16266880158@72.37.161.251
:5060 [BREAK]<br>2007-12-10 11:44:00 [DEBUG] mod_conference.c:1531 conference_loop_output() setup timer soft success interval: 20&nbsp; samples: 160<br>2007-12-10 11:44:00 [DEBUG] switch_core_io.c:292 switch_core_session_read_frame() Engaging Read Buffer at 320 bytes
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