[SIPForum-discussion] reliable 1xx

[Anthony Orlando]

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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