all,

Pl find the below snippet in RFC 5628!
      *  It should remove any temporary GRUUs with a "callid" attribute
         value different from that in the value of the "callid"
         attribute of the <contact>, or with a "cseq" attribute with
         value less than the value of the "first-cseq" attribute of the
         <temp-gruu>.

    It means that the Registrar shall invalidate the temporary GRUU, when a
certain limit is reached. And, the limit shall be conveyed to UE using 
reg-ev
package. Is this true?

    It contradicts the fact that RFC5627 mentions that the temporary
GRUU is valid till the user deregister or registers with a different Call-Id 
header.

    What is the real need for "first-cseq" attribute in this RFC?

Best Regards,
Mohammed Hanifa 

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