[SIPForum-discussion] Difference between UPDATE and Re-INVITE

[SIP SIP]

But in UPDATE also you must need to put a body if you want to change the
media session parameters.
Here what most of you have said is ------
Re-INVITE cant be sent before session is established.But UPDATE can be sent
always.

I want to know if there is any other major difference?????

Thanks

On Thu, Oct 1, 2009 at 10:02 PM, prasanna c <c_prasanna_c at hotmail.com>wrote:

> If UAs support UPDATE, I would rather use UPDATE instead of Re-Invite for
> two reasons. One I don't have to place any body into the SIP message.
> Second, UPDATE transaction is much faster compared to re-invite.
>
>
> ------------------------------
> Date: Thu, 1 Oct 2009 17:46:05 +0530
> Subject: Re: [SIPForum-discussion] Difference between UPDATE and Re-INVITE
> From: sriram.ngn at gmail.com
> To: c_prasanna_c at hotmail.com
> CC: yansb43 at gmail.com; discussion at sipforum.org
>
>
> For session timers generally a REFRESH INVITE  mostly and not UPDATE as it
> is common that many sip stacks does not support UPDATE mechanism
>
> A Refresh invite is slightly different from a Re-INVITE ,It does not change
> the Media capabilities and also if u see the O-Line in the SDP the Session
> ID and Session Version will not be incremented like in a Re-Invite.
>
> Regards,
> Sriram
>
>
>
> On Wed, Sep 30, 2009 at 8:57 AM, prasanna c <c_prasanna_c at hotmail.com>wrote:
>
> UPDATE need not exchange session descriptions, where as INVITE transaction
> always exchange the session descriptions. This makes UPDATE ideal for
> session timers implementation.
>
> ------------------------------
> Date: Tue, 29 Sep 2009 22:45:08 +0530
> From: yansb43 at gmail.com
> To: discussion at sipforum.org
> Subject: [SIPForum-discussion] Difference between UPDATE and Re-INVITE
>
>
> Hi All,
>
> Hope all of you are doing fine.
>
> Here I am with a age old query.
>
> Difference between UPDATE and Re-INVITE.
>
> One basic difference is-----
>
> Re-INVITE cant be sent before session is established.But UPDATE can be sent
> always.
>
> Is there any other major difference?????
>
> Thanks
>
>
>
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