[SIPForum-discussion] Multiple 183 w/SDP along with PRACK

[NK]

Dear All,

I have call flow like where Vendor sends 183 w/SDP included Rseq and
customer sents the PRACK and 200 OK from vendor.

After that vendor is again sending 1~2 183 w/SDP where it is not changing
anything in SDP but only asking for PRACK by sending RSEQ. I checked the
RFC , but cannot see anything like which says UAS cannot send multiple 183
w/SDP.

Can you please help on this, whether any  UAS can send multiple 183 w/SDP
where it is asking for PRACK? Is it valid call flow, because i cannot see
anything RFC.

Regards,
Nitin Kapoor
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