[SIPForum-discussion] Sip Update Mesagge

[sreekant nair]

Hello,
Isn't an UPDATE is mainly used to modify Session Parameters for an Early Dialog (most clients use Re-INVITE for Confirmed Dialogs).

The scenario below isnt invalid, but probably not correct for the Context. It also depends on WHAT the UPDATE is trying to modify. Thats probably why the other client is responding with error.

Cheers
Sreekant Nair



----- Original Message ----
From: Osman Bilgehan KARLI <obkarli at aselsan.com.tr>
To: SIP Forum <discussion at sipforum.org>
Sent: Monday, September 8, 2008 4:17:27 AM
Subject: [SIPForum-discussion] Sip Update Mesagge


Hi all,

I have one basic question,

Can we able to send UPDATE message without including SDP/Media information.

Is it (Conversation like that) possible ?,

1-Inivite(sdp)------- User agent 1
2-18x(sdp)----------User agent 2
3- Update(without sdp)--- User agent 1
4- 200 OK(response to Update without sdp)---- User agent 2
5- 200 OK(response to Invite with sdp)---- User agent 2


At now we are trying that and user agent 2 response with an error. Is it general situation or an extreme case.

Thanks for all

Regards



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