Hi Brett,
Thanks for the pointers.Indeed you are correct. My case is of 3pcc call.
My doubt in RFC 3312 is about 183 response for a re-INVITE. Do user-agents
respond with 18x for a re-INVITE and accept 183 in re-INVITE? What is the call
state?How should 3pcc AS support 183 in re-INVITE? Should it pass it on to the
other leg?
Have only seen 200 OK response for a re-INVITE.
Regards,Amrita
On Friday, 22 July 2016 9:57 PM, Brett Tate <[email protected]> wrote:
Preconditions within re-INVITE is discussed within RFC 3312, RFC 6141, and
RFC 4032. RFC 3725 may also be of interest since your use case sounds like
3PCC.
RFC 4032 section 4 discusses a 3PCC situation that you might hit.
> -----Original Message-----
> From: [email protected] [mailto:sip-
> [email protected]] On Behalf Of amrita chaudhary
> Sent: Friday, July 22, 2016 11:10 AM
> To: [email protected]
> Subject: [Sip-implementors] Precondition negotiation in re-INVITE
>
> Hi,
> Is it possible to do precondition negotiation in re-INVITE when first leg
> of
> the call is established?Scenario: AS connects A-party to C-party after B-
> party (which was in conversation with A) is released.A, B and C are VoLTE
> terminals.
> Does anybody has done this in their implementation.
>
> Regards,Amrita
>
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