会议设置
30xx 窄带会议
31xx 宽带会议
32xx 超宽带会议
33xx CD音质会议将会议设置密码：
vim freeswitch/etc/freeswitch/dialplan/default.xml
将
<extension name="nb_conferences"><condition field="destination_number" expression="^(30\d{2})$">
<action application="answer"/>
<action application="conference" data="$1-${domain_name}@default"/></condition>
</extension>
改
<extension name="nb_conferences"><condition field="destination_number" expression="^(30\d{2})$">
<action application="answer"/>
<action application="conference" data="$1-${domain_name}@default+1122"/></condition>
</extension>测：保存后，Freeswitch按[F6],
如多个SIP电话机拨打3001，按照提示音输入密码进入会议================================================
会议配置文件参数：会议采样率：
<param name="rate" value="8000"/>每秒间隔
<param name="interval" value="20"/>被静音/
<param name="muted-sound" value="conference/conf-muted.wav"/>
<param name="unmuted-sound" value="conference/conf-unmuted.wav"/>会议里只有1个人时的提示语，注释就可以屏蔽
<param name="alone-sound" value="conference/conf-alone.wav"/>避免大家都不说话以为线路断了，产生舒适的很小的噪音，
<param name="comfort-noise" value="true"/>会议录音文件
<param name="auto-record" value="$${recordings_dir}/${conference_name}_${strftime(%Y-%m-%d-%H-%M-%S)}.wav"/>==========================================列出当前存在的会议：
freeswitch@CentOS> conference listConference 3300-172.16.20.139 (2 members rate: 48000 flags: running|answered|enforce_min|dynamic|exit_sound|enter_sound|json_status)
28;sofia/internal/1002@172.16.20.139;b0c44abe-354a-11e7-917b-45f04867d087;1002;1002;hear|speak|talking|floor|vid-floor;0;0;0;100
27;sofia/internal/1001@172.16.20.139;acccd9bc-354a-11e7-9172-45f04867d087;1001;1001;hear|speak|video;0;0;0;100向当前会议播放音乐：
freeswitch@CentOS> conference 3300-172.16.20.139 play /root/freeswitch/share/freeswitch/sounds/music/48000/suite-espanola-op-47-leyenda.wav停止播放音乐：
freeswitch@CentOS> conference 3300-172.16.20.139 stop all调整所有成员的拾音音量：0-4级可调
freeswitch@CentOS> conference 3300-172.16.20.139 volume_out all  1
freeswitch@CentOS> conference 3300-172.16.20.139 volume_out all  4
Volume OUT 28 = 4
Volume OUT 27 = 4调整所有成员的输出音量：0-4级可调
freeswitch@CentOS> conference 3300-172.16.20.139 volume_out all  1
freeswitch@CentOS> conference 3300-172.16.20.139 volume_out all  4
Volume OUT 28 = 4
Volume OUT 27 = 4会议加锁，不允许再加入新用户
freeswitch@CentOS> conference 3300-172.16.20.139 lock
OK 3300-172.16.20.139 locked会议解锁
freeswitch@CentOS> conference 3300-172.16.20.139 unlock
OK 3300-172.16.20.139 unlocked启用AGC自动增益
freeswitch@CentOS> conference 3300-172.16.20.139 agc会议邀请：
freeswitch@CentOS> conference 3300-172.16.20.139 dial user/1000会议邀请，命令行不再阻塞
freeswitch@CentOS> conference 3300-172.16.20.139 bgdial user/1000