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This document introduces the transport of call control User-to-User Information
(UUI) using the Session Initiation Protocol (SIP) and develops several requirements for a new SIP
mechanism. Some SIP sessions are established by or related to a non-SIP application.
This application may have information that needs to be transported between the SIP User
Agents during session establishment. In addition to interworking with the Integrated Services Digital Network
(ISDN) UUI Service, this extension will also be used for native SIP endpoints requiring
application UUI. This document is not an Internet Standards Track specification; it
is published for informational purposes.
Alan Johnston <email@example.com>
Laura Liess <firstname.lastname@example.org>
(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid)