Как отключить транскодинг

<configuration name="sofia.conf" description="sofia Endpoint">
   <profiles>
     <profile name="sip">
       <settings>
         <param name="disable-transcoding" value="true"/>
         <param name="inbound-late-negotiation" value="false"/>

https://freeswitch.org/confluence/display/FREESWITCH/Sofia+SIP+Stack