Updates to Private Header Extension Usage in Session Initiation Protocol Requests and Responses
RFC 7976, “Updates to Private Header Extension Usage in Session Initiation Protocol Requests and Responses”, is an Informational document published in September 2016 by C. Holmberg, N. Biondic, G. Salgueiro. It updates RFC 7315. It has been obsoleted by RFC 9878 — refer to the newer document for the authoritative version. The canonical text is published by the RFC Editor.
Abstract
The Third Generation Partnership Project (3GPP) has identified cases where different SIP private header extensions referred to as "P-" header fields, and defined in RFC 7315, need to be included in SIP requests and responses currently not allowed according to RFC 7315. This document updates RFC 7315, in order to allow inclusion of the affected "P-" header fields in such requests and responses.
This document also makes updates for RFC 7315 in order to fix misalignments that occurred when RFC 3455 was updated and obsoleted by RFC 7315.
What “Informational” means
Published for the general information of the community. It does not define an IETF standard and carries no standards-track status.
The canonical text of RFC 7976 is hosted at rfc-editor.org. Available in TXT,HTML.
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