SIP

[sourajit01]

Hi,

During Early Media with EO and EM with DO, are there two different sets of SDP shared between the parties (one for early media and the other for the RTP). 

Thanks

[Anthony Holloway]

Nope, the Early Media is "the media" for the rest of the call. It's just setup earlier than normal in the flow (usually with a 183 and a PRACK.)

[sourajit01]

Thanks Anthony.
So incase we have an EM call with EO. So in this case the SDP details are shared in the Invite and 183 messages. But sometimes I see the SDP shared with 200 OK as well but I believe they'll contain the same RTP IP/ ports, codec info as 183 Progress,right?