[SIPForum-discussion] reliable 1xx

[Rohin Koul]

On 06/12/2007, sreekant nair <sreekant_nair at yahoo.com> wrote:
>
>  Hi Anthony,
>
> I believe if you support the 100Rel Tag, then you need to PRACK the 18x
> irrespective of whether it contained an SDP or not.
>


I guess that should be if you support 100Rel and other guy requires 100Rel

  However, if there was no SDP, I think the UAS(or proxy) could still send
> the 2XX and not wait for the PRACK. (Need to confirm this from the RFC)
>
> Cheers
> Sreekant
>
> ----- Original Message ----
> From: Anthony Orlando <avorlando at yahoo.com>
> To: discussion at sipforum.org
> Sent: Thursday, December 6, 2007 4:39:55 AM
> Subject: [SIPForum-discussion] reliable 1xx
>
> Gurus,
>   I have a question regarding PRACKing of a
> provisional response.  My understanding has always
> been that you would only PRACK a 18x if it contains
> SDP.  The reason is  you want to ensure reliable
> delivery of the SDP.  Otherwise the 18x is not
> critical.
>
> Please feel free to comment and correct me if I am
> wrong.  Also is there a difference between 3gpp and
> IETF on this subject?  I am in an IMS environment.
>
>
>
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