[SIPForum-discussion] Need clarification on Re-Invite ..

Tue May 25 08:01:11 UTC 2010

Sorry, my language was not clear. What I mean to say:

UPDATE: Can be used before & after the session got established.
INVITE: Can be used only after the session got established.

Regards,
Ravi SINHA
Société Aricent - Prestataire du Groupe SFR
DGRE / Direction Intégration Validation et Bout-en-Bout/CoreMobile
T : 01 71 08 05 50
ravi-ranjan.sinha.prestataire at sfr.com<mailto:ravi-ranjan.sinha.prestataire at sfr.com>
ravi.sinha at aricent.com<mailto:ravi.sinha at aricent.com>
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________________________________
From: Dasu B [dasu.eci at gmail.com]
Sent: Tuesday, May 25, 2010 11:52 AM
To: shiba shankar rout
Cc: Ravi Ranjan Sinha; discussion at sipforum.org
Subject: Re: [SIPForum-discussion] Need clarification on Re-Invite ..

Yes Ravi..You are correct.UPDATE is also used for session refresher.If sending re-Invite,It can contains SDP but if sending Update method for session refresher (which is actually half of the Timer),it will not contain any SDP..This is as per RFC-4028.

Thanks
B Dasu

On Mon, May 24, 2010 at 11:28 PM, shiba shankar rout <rout.shibashankar at gmail.com<mailto:rout.shibashankar at gmail.com>> wrote:
No Ravi,

Its not like that. UPDATE can also be used after session establishment.   After Session establishment UAC uses UPDATE as Session Refresher.

Best Regards,
S S Rout

On Wed, Apr 28, 2010 at 2:28 PM, Ravi Ranjan Sinha <ravi.sinha at aricent.com<mailto:ravi.sinha at aricent.com>> wrote:
Difference between Update & Re-INVITE:

Update could be used before the session is established (before final response & ACK), while Re-INVIE can be used only after session is established.

Regards,
Ravi SINHA
Société Aricent - Prestataire du Groupe SFR
DGRE / Direction Intégration Validation et Bout-en-Bout/CoreMobile
T : 01 71 08 05 50
ravi-ranjan.sinha.prestataire at sfr.com<mailto:ravi-ranjan.sinha.prestataire at sfr.com>
ravi.sinha at aricent.com<mailto:ravi.sinha at aricent.com>
124 Boulevard Verdun - Prologue
92400 Courbevoie
www.sfr.fr<http://www.sfr.fr/>

________________________________
From: discussion-bounces at sipforum.org<mailto:discussion-bounces at sipforum.org> [discussion-bounces at sipforum.org<mailto:discussion-bounces at sipforum.org>] On Behalf Of Murali Vuppandla [mvuppand at cisco.com<mailto:mvuppand at cisco.com>]

Sent: Monday, April 26, 2010 12:20 PM
To: discussion at sipforum.org<mailto:discussion at sipforum.org>
Subject: [SIPForum-discussion] Need clarification on Re-Invite ..

There are two SIP  subscribers A and B configured with G729 codec.

A calls B. B is ringing. Now, I want to simulate a scenario wherein  A sends Re-Invite to B and B responds accordingly. What actually makes A send Re-invite to B before the session is established(do we need any extra configurations to simulate this scenario). Any real time scenarios in this regard is much helpful.

And what’s the exact difference between UPDATE and RE-INVITE. I had read somewhere UPDATE is sent before the session is established whereas Re-Invite is sent after the session is established.

Please clarify me on this.

Regards,
Murali.

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