1. Introduction

本页保留该章节的 RFC 文本, 并补充文档站点所需的导航元数据.

RFC 文本 (RFC Text)

1. Introduction

The Third Generation Partnership Project (3GPP) has identified cases where different Session Initiation Protocol (SIP) [RFC3261] private header extensions referred to as "P-" header fields, and defined in [RFC7315], need to be included in SIP requests and responses where they were not allowed according to [RFC7315]. This document updates [RFC7315], in order to allow inclusion of the affected "P-" header fields in such requests and responses.

This document also makes updates to [RFC7315] in order to fix misalignments that occurred when [RFC3455] was updated and subsequently obsoleted by the publication of [RFC7315].