Hi, If INVITE sent again with the same Call-ID and From tag, the CSeq should at least be incremented and Via branch updated since it is a new transaction.
RFC 3261 section 8.1.3.5 indicates that a retry may or may not be possible (the section does not specifically mention 408). However since 408 is not soliciting an amendment to a request, I doubt that the section 8.1.1.4 text allowing Call-ID reuse would be considered applicable to 408. Also be aware that re-use of Call-ID (after processing 408 during call setup) might increase the likelihood of experiencing interoperability issues. > -----Original Message----- > From: sip-implementors-boun...@lists.cs.columbia.edu [mailto:sip- > implementors-boun...@lists.cs.columbia.edu] On Behalf Of Rakesh > Sent: Friday, January 27, 2017 6:05 AM > To: sip-implementors > Subject: [Sip-implementors] Request for RFC section for UE behavior > > Dear Expert, > > Can UE reuse the same Call-ID, From tag and CSeq number, as it had used for > another INVITE which got terminated by 408, or it should really update the > Call-ID and/or From tag, to send the new INVITE request? > > > Is there any RFC 3261 section mentioned for this? > > *Best Regards* > > *Rakesh Kumar Mohanty* > _______________________________________________ > Sip-implementors mailing list > Sip-implementors@lists.cs.columbia.edu > https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
