An Extension to the Session Initiation Protocol for Request History Information
RFC 4244, “An Extension to the Session Initiation Protocol for Request History Information”, is a Proposed Standard document published in November 2005 by M. Barnes. It has been obsoleted by RFC 7044 — refer to the newer document for the authoritative version. 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 call arrives at a specific application or user. This document defines a new optional SIP header, History-Info, for capturing the history information in requests. [STANDARDS-TRACK]
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 4244 is hosted at rfc-editor.org. Available in TXT,HTML.
- RFC 4243 Vendor-Specific Information Suboption for the Dynamic Host Configuration Protocol Relay Agent Option
- RFC 4245 High-Level Requirements for Tightly Coupled SIP Conferencing
- RFC 4242 Information Refresh Time Option for Dynamic Host Configuration Protocol for IPv6
- RFC 4241 A Model of IPv6/IPv4 Dual Stack Internet Access Service
- RFC 4247 Requirements for Header Compression over MPLS
- RFC 4240 Basic Network Media Services with SIP
- RFC 4248 The telnet URI Scheme
- RFC 4239 Internet Voice Messaging