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

[chinmaya badapanda]

Hi ,

Both re-Invite and UPDATE are similar but the actual difference lies where
UPDATE is always one way
whereas in re-invite the negotiation happens like initial invite request. In
UPDATE, either offer is accepted or ignored but the entity which receives
UPDATE can't send it's allowed media parameters in the
response, like what happens in 200OK for INVITE or re-INVITE.

Regards
Chinmaya


On Mon, Apr 26, 2010 at 12:20 PM, Murali Vuppandla <mvuppand at cisco.com>wrote:

>  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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-- 
//chinmaya
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