[SIPForum-discussion] How to make Re-Invite without SDP

[M. Ranganathan]

On Mon, Nov 17, 2008 at 10:33 AM, Raghul Prasanna <raghul82 at yahoo.co.uk> wrote:
> HI Shiba,
>
>  I dont think we can reinvite without SDP, because the purpose of reinvite
> is to change the media characteristics of a call after the call got
> established..
>
>  Please can someone correct if I am wrong...

You are corrected.

You solicit an SDP offer using a Re-INVITE without SDP. The OK should
have the SDP offer and you ACK with SDP to complete the 3-way
handshake.

>
>   For generating PRACK, the invite shd have supported:100 rel parameter..
>
> Thanks,
> Raghul
> --- On Sun, 16/11/08, shiba shankar rout <rout.shibashankar at gmail.com>
> wrote:
>
> From: shiba shankar rout <rout.shibashankar at gmail.com>
> Subject: [SIPForum-discussion] How to make Re-Invite without SDP
> To: discussion at sipforum.org
> Date: Sunday, 16 November, 2008, 6:24 AM
>
> Hi everyone,
>
> I am not able to make re-invite without SDP. How to make re-invite without
> SDP & with PRACK.
> Is there any solution to this?
>
> Any hint would be welcome.
>
> Thanks
> S S rout
>
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-- 
M. Ranganathan