[SIPForum-discussion] Early media...Use.

[resalath ahamed]

Hi nithya,

Early media is delivring media parameters in 18X reponses. Usually PRACK
method is used to acknowledge the SDP in 18X response.

Imagine a situation where a SIP UA has originated a call and there is some
announcement to be played then, SDP parameters are sent in 18X response so
that the announcements can be played. This is a simple example why early
media is used. I do not understand why u are trying to relate this with
Re-Invite. Please let me know about this.

Please let me know if i am worng in my understanding.

Regards,
Resalath


On 2/2/07, nithya kumar <nithyakr at huawei.com> wrote:
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> Hi Sip Experts,
>
>               Can some one explain the exact use of Early media ?????
> …Early media is nothing but exchange of SDP parameter Before call
> Begins(means Dialog begins)…if so Re-invite to both Caller and callee before
> call starts (dialog starts) also doing SDP exchange functionality….!!!! …
>
> --- if so exact use of early media????
>
> -- early media is compulsory ??
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> Nithya Kumar.R
>
> Huawei Technologies India Pvt Ltd,
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> Bangalore
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> Mob-9986035813
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