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Relationship with HERFP(Heterogeneous Error Response Forking Problem )draft-mahy-sipping-herfp-fix-01.txt 199 does not assume the UAC to send a new INVITE once it has been informed about the terminated dialog Does not need to associate a ”new” INVITE with the ongoing INVITE transaction. Proxy does not need to provide a URI pointing towards the UAS from where the non-2xx final response was received No need to define a new DECLINE method Applicable to all non-2xx responses Only sent if an early dialog has been created |