[OpenSIPStack] Ringing with SDP and early media

[<jf...@id...>]

Hi guys,

Call flow: PSTN going to SIP Gateway

When interfacing with PSTN, they are waiting for ringing with sdp for
early media, my question is it the server responsibility to send the sdp
in ringing or is it the sip client? or should I delay the sending of
ringing after the 200 OK with sdp of sip client?


Regards,
Julian