Re: [rtcweb] Same answer in a provisional and a final response

[Randell Jesup <[e-mail]>]

On 11/14/2011 9:38 PM, Gonzalo Camarillo wrote:
> Hi,
>
> with respect to today's discussion during the face-to-face session about
> whether a SIP UAS needs to place the same answer in a final response as
> it placed in a previous provisional response, this is the relevant text
> in RFC 3261:
>
> http://tools.ietf.org/html/rfc3261#page-80
>
>          "If the initial offer is in an INVITE, the answer MUST be in a
>           reliable non-failure message from UAS back to UAC which is
>           correlated to that INVITE.  For this specification, that is
>           only the final 2xx response to that INVITE.  That same exact
>           answer MAY also be placed in any provisional responses sent
>           prior to the answer."

Yes, though I'll note that differing 200 OK's from 18x provisionals is 
in my experience far more common than identical 200 OK's.  (As Cullen 
alluded to.)


-- 
Randell Jesup
[e-mail]