Hi

I am confused about the section 13.2 of RFC 3261. The description
given in the RFC looks inconsistent.
My call flow is as follows:

INVITE with sdp & Supp 100rel
----------->
100 Trying
<------------
180 Ringing with Req 100rel & sdp
<------------
PRACK no sdp
------------>
200OK for prack no sdp
<------------
200OK for INV no sdp  <<is this OK>>
<------------
ACK
----------->
Is the above call flow correct?


--------
    o  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.  The UAC MUST treat the first session
         description it receives as the answer, and MUST ignore any
         session descriptions in subsequent responses to the initial
         INVITE.
----------

Thanks
Harsimran Singh
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