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

[Dasu B]

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> 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> 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*
>>
>> ravi.sinha at aricent.com
>>
>> 124 Boulevard Verdun - Prologue
>> 92400 Courbevoie
>> www.sfr.fr
>>
>>
>>  ------------------------------
>> *From:* discussion-bounces at sipforum.org [discussion-bounces at sipforum.org]
>> On Behalf Of Murali Vuppandla [mvuppand at cisco.com]
>>
>> *Sent:* Monday, April 26, 2010 12:20 PM
>> *To:* 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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