An Extension to the Session Initiation Protocol for Request History Information
RFC 7044, “An Extension to the Session Initiation Protocol for Request History Information”, is a Proposed Standard document published in February 2014 by M. Barnes, F. Audet, S. Schubert, J. van Elburg, C. Holmberg. It obsoletes RFC 4244. The canonical text is published by the RFC Editor.
Abstract
This document defines a standard mechanism for capturing the history information associated with a Session Initiation Protocol (SIP) request. This capability enables many enhanced services by providing the information as to how and why a SIP request arrives at a specific application or user. This document defines an optional SIP header field, History-Info, for capturing the history information in requests. The document also defines SIP header field parameters for the History-Info and Contact header fields to tag the method by which the target of a request is determined. In addition, this specification defines a value for the Privacy header field that directs the anonymization of values in the History-Info header field. This document obsoletes RFC 4244.
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 7044 is hosted at rfc-editor.org. Available in TXT,HTML.
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