[SIPForum-discussion] P-Early-Media and Offer-Answer Relation

[Pranav Damele]

Hello Ankur,

I believe you should use UPDATE method when an early-media has been
established and you need to modify the characteristics of that session
rather than 200 OK.

Regards,

Pranav Damele
ARICENT
Senior Engineer - Testing
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On 14 June 2013 16:04, ankur bansal <abh.ankur at gmail.com> wrote:

> Hi All ,
>
> I have come across one sceanrio :
>
> Invite sdp(O1)---------------------->
> 183 sdp V1(A1) <----------------------
> 200 sdp V2 <-----------------------------
> ACK ------------------------------------->
>
> Here Sdp coming in 183 and 200 is same but server sending diff versions
> for both.
> As offer answer is complete after 183 sdp ,how should we handle  200 sdp ?
>   1. Assuming 200 sdp as new offer and send answer in ACK ?
>   2. Ignore 200 sdp as offer answer already completed ?
>
> Also note 183 is coming with P-Early-Media header .
> Does P-Early-Media in 183 response gives us any flexibility regarding
> Offer answer model or not ?
>
>
> Thanks & regards
> Ankur Bansal
>
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