A Mechanism for Transporting User-to-User Call Control Information in SIP
RFC 7433, “A Mechanism for Transporting User-to-User Call Control Information in SIP”, is a Proposed Standard document published in January 2015 by A. Johnston, J. Rafferty. The canonical text is published by the RFC Editor.
Abstract
There is a class of applications that benefit from using SIP to exchange User-to-User Information (UUI) data during session establishment. This information, known as call control UUI data, is a small piece of data inserted by an application initiating the session and utilized by an application accepting the session. The syntax and semantics for the UUI data used by a specific application are defined by a UUI package. This UUI data is opaque to SIP and its function is unrelated to any basic SIP function. This document defines a new SIP header field, User-to-User, to transport UUI data, along with an extension mechanism.
What “Proposed Standard” means
An entry-level standards-track specification: stable, peer-reviewed and a solid basis for implementation, though it may still evolve before becoming an Internet Standard.
The canonical text of RFC 7433 is hosted at rfc-editor.org. Available in TXT,HTML.
- RFC 7432 BGP MPLS-Based Ethernet VPN
- RFC 7434 Interworking ISDN Call Control User Information with SIP
- RFC 7431 Multicast-Only Fast Reroute
- RFC 7430 Analysis of Residual Threats and Possible Fixes for Multipath TCP
- RFC 7436 IP-Only LAN Service
- RFC 7429 Distributed Mobility Management: Current Practices and Gap Analysis
- RFC 7437 IAB, IESG, and IAOC Selection, Confirmation, and Recall Process: Operation of the Nominating and Recall Committees
- RFC 7428 Transmission of IPv6 Packets over ITU-T G.9959 Networks