freeswitch webrtc MCU three configuration files, and conference full command explanation

sudo ./freeswitch -nc -nonat
sudo ./fs_cli
load mod_av
load mod_verto

1.default
sudo vim /usr/local/freeswitch/conf/dialplan/default.xml

<extension name="cdquality_conferences">
  <condition field="destination_number" expression="^(35\d{2})$">
<action application="answer"/>
  <action