RFC 4321 · INFORMATIONAL · 2006
SUN · 14 JUN 2026
Problems Identified Associated with the Session Initiation Protocol's Non-INVITE Transaction
Overview
RFC 4321, “Problems Identified Associated with the Session Initiation Protocol's Non-INVITE Transaction”, is an Informational document published in January 2006 by R. Sparks. The canonical text is published by the RFC Editor.
Abstract
This document describes several problems that have been identified with the Session Initiation Protocol's (SIP) non-INVITE transaction. This memo provides information for the Internet community.
What “Informational” means
Published for the general information of the community. It does not define an IETF standard and carries no standards-track status.
Read this RFC
The canonical text of RFC 4321 is hosted at rfc-editor.org. Available in TXT,HTML.
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