earlymedia and SIP SDP

[Andrey Seredin]

how to send SIP SDP 183 signal in the process of establishing a connection ?

Adhearsion docs adhearsion.com/docs/call-controllers reccomend make answer in method run CallController class

How send SIP SDP 183 before Adhearsion answer ?

In asterisk this Progress() application.

In FreeSWITCH need insert <action application="pre_answer"/> 

<extension name="adhearsion">

    <condition>

        <action application="pre_answer"/>

        <action application="rayo"/>

    </condition>

</extension>