[SIPForum-discussion] Offer_answer issue

Tomasz Zieleniewski tzieleniewski at gmail.com
Mon Jun 1 08:45:31 UTC 2009


In Your case UA1 should normally construct initial INVITE with SDP offer
containing this particular codec specification. Despite any other non-media
related reasons UA2 will reject INVITE with 488/606 (Not Acceptable Here)
in case the session description is not acceptable or will accept session
offer by
sending a final 2xx response with SDP answer containing the same codec
Provisional responses can also contain the same SDP contents as final 2xx

Kind regards,
Tomasz Zieleniewski

2009/5/29 SINGH ANURAG <Anurag.Singh at alcatel-lucent.com>

> Hello All,
> UA1 can open cahnnel only with one codec, so it need to negotiate with
> one codec
> I will take you to the example straight.
> UA1                                                     UA2
> -----INVITE(Offer m =0 8 18)----------->
> <-------200OK(Answer m=18 8)-----------
> --------INVITE(offer m=18)------------->
> <-------200OK(Answer m=8 18)------------
> what should be the behaviour?? is there any standred stating the
> behaviour
> Regards
> Anurag
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