Hi, draft-ietf-sipping-sip-offeranswer-18 in page 6 states: In addition, there is a possibility for UAC to receive a 488 response for an PRACK request. In that case, UAC may send again a PRACK request without an offer or send a CANCEL request to terminate the INVITE transaction. It should also mention the posibility of sending a BYE which, as per RFC 3261, is also valid to terminate an early-dialog. Regards. -- Iñaki Baz Castillo <ibc@xxxxxxxxx> _______________________________________________ Sipping mailing list https://www.ietf.org/mailman/listinfo/sipping This list is for NEW development of the application of SIP Use sip-implementors@xxxxxxxxxxxxxxx for questions on current sip Use sip@xxxxxxxx for new developments of core SIP