Session Initiation Protocol Exceptional Procedure Examples

Document Type Replaced Internet-Draft (individual)
Last updated 2006-03-21 (latest revision 2006-03-05)
Replaced by draft-hasebe-sipping-race-examples
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This document gives examples of Session Initiation Protocol (SIP) call flows in race condition. Call flows in race conditions are confusing and this document shows the best practices to handle them. The elements in these call flows include SIP User Agents and SIP Proxies. Call flow diagrams and message details are shown.


Miki Hasebe (

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