This memo provides information for the Internet community. It does not specify an Internet standard of any kind. Distribution of this memo is unlimited. Copyright Notice Copyright (C) The Internet Society (2006). This document describes several problems that have been identified with the Session Initiation Protocol’s (SIP) non-INVITE transaction. Table of Contents 1. Problems under the Current Specifications.......................2 1.1. NITs must complete immediately or risk losing a race.......2 1.2. Provisional responses can delay recovery from lost final responses............................................
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