IR.95-v2.0 - SIP-SDP Inter-IMS NNI Profile

Aug 30, 2026

Upload by Fahsai

IR.95 v2.0 defines the SIP-SDP Inter-IMS NNI Profile for non-binding permanent reference use within the GSMA framework. It sets out applicable services and the technical approach for IP interconnection, covering SIP methods, status codes, header handling, and SIP message transport and signalling modes. The specification details numbering and addressing, SIP message bodies, media control through SDP offer/answer, RTP profiles, codec negotiation, and early media and SDP contents. Annex material provides informational SIP header and message examples.

LanguageEnglish

CategoryPresentations

FormatDOCX

Pages169

Reading Time59 min

AccessFree to download

Introduction

Overview

Relationship to Existing Standards

Scope

Definition of Terms

Document Cross-References

Applicable Services

IP Interconnection

SIP Methods & Headers

SIP Method Handling

SIP Status Code Handling

SIP Header Handling

SIP Requests

SIP Responses

SIP Message Transport

SIP Signalling Mode

Numbering & Addressing

SIP Message Bodies

SIP Options Tags

Media Control

SIP SDP Offer / Answer

RTP Profile

Codecs

IP Version

Annex A SIP Header Examples (Informational)

Annex B SIP Message Examples (Informational)

EMBED PBrush SIP-SDP Inter-IMS NNI Profile Version 1.0 17 February 2015 This is a Non-binding Permanent Reference Document of the GSMA Security Classification: Non-confidential Access to and distribution of this document is restricted to the persons permitted by the security classification. This document is confidential to the Association and is subject to copyright protection. This document is to be used only for the purposes for which it has been supplied and information contained in it must not be disclosed or in any other way made available, in whole or in part, to persons other than those permitted under the security classification without the prior written approval of the Association. Copyright Notice Copyright © DATE \@ "YYYY" \* MERGEFORMAT 2026 GSM Association Disclaimer The GSM Association (“Association”) makes no representation, warranty or undertaking (express or implied) with respect to and does not accept any responsibility for, and hereby disclaims liability for the accuracy or completeness or timeliness of the information contained in this document. The information contained in this document may be subject to change without prior notice. Antitrust Notice The information contain herein is in full compliance with the GSM Association’s antitrust compliance policy. Table of Contents TOC \o "1-3" \h \z \u HYPERLINK \l "_Toc477102202" 1 Introduction PAGEREF _Toc477102202 \h 4 HYPERLINK \l "_Toc477102203" 1.1 Overview PAGEREF _Toc477102203 \h 4 HYPERLINK \l "_Toc477102204" 1.2 Relationship to Existing Standards PAGEREF _Toc477102204 \h 4 HYPERLINK \l "_Toc477102205" 1.3 Scope PAGEREF _Toc477102205 \h 4 HYPERLINK \l "_Toc477102206" 1.4 Definition of Terms PAGEREF _Toc477102206 \h 5 HYPERLINK \l "_Toc477102207" 1.5 Document Cross-References PAGEREF _Toc477102207 \h 6 HYPERLINK \l "_Toc477102208" 2 Applicable Services PAGEREF _Toc477102208 \h 10 HYPERLINK \l "_Toc477102209" 3 IP Interconnection PAGEREF _Toc477102209 \h 11 HYPERLINK \l "_Toc477102210" 4 SIP Methods & Headers PAGEREF _Toc477102210 \h 11 HYPERLINK \l "_Toc477102211" 4.1 SIP Method Handling PAGEREF _Toc477102211 \h 13 HYPERLINK \l "_Toc477102212" 4.2 SIP Status Code Handling PAGEREF _Toc477102212 \h 13 HYPERLINK \l "_Toc477102213" 4.3 SIP Header Handling PAGEREF _Toc477102213 \h 13 HYPERLINK \l "_Toc477102214" 4.3.1 SIP Requests PAGEREF _Toc477102214 \h 13 HYPERLINK \l "_Toc477102215" 4.3.2 SIP Responses PAGEREF _Toc477102215 \h 14 HYPERLINK \l "_Toc477102216" 4.4 SIP Header Support (Summary) PAGEREF _Toc477102216 \h 14 HYPERLINK \l "_Toc477102217" 4.4.1 Trust Relationships PAGEREF _Toc477102217 \h 14 HYPERLINK \l "_Toc477102218" 4.5 SIP Header Support (Per Method / Response) PAGEREF _Toc477102218 \h 15 HYPERLINK \l "_Toc477102219" 4.5.1 Additional Headers PAGEREF _Toc477102219 \h 16 HYPERLINK \l "_Toc477102220" 4.5.2 Header Manipulation PAGEREF _Toc477102220 \h 16 HYPERLINK \l "_Toc477102221" 5 SIP Message Transport PAGEREF _Toc477102221 \h 16 HYPERLINK \l "_Toc477102222" 6 SIP Signalling Mode PAGEREF _Toc477102222 \h 17 HYPERLINK \l "_Toc477102223" 7 Numbering & Addressing PAGEREF _Toc477102223 \h 17 HYPERLINK \l "_Toc477102224" 8 SIP Message Bodies PAGEREF _Toc477102224 \h 18 HYPERLINK \l "_Toc477102225" 9 SIP Options Tags PAGEREF _Toc477102225 \h 21 HYPERLINK \l "_Toc477102226" 10 Media Control PAGEREF _Toc477102226 \h 22 HYPERLINK \l "_Toc477102227" 10.1 SIP SDP Offer / Answer PAGEREF _Toc477102227 \h 22 HYPERLINK \l "_Toc477102228" 10.2 RTP Profile PAGEREF _Toc477102228 \h 23 HYPERLINK \l "_Toc477102229" 10.3 Codecs PAGEREF _Toc477102229 \h 24 HYPERLINK \l "_Toc477102230" 10.3.1 Audio Codecs PAGEREF _Toc477102230 \h 24 HYPERLINK \l "_Toc477102231" 10.3.2 Video Codecs PAGEREF _Toc477102231 \h 2

FAQs

What does IR.95 v2.0 cover in the SIP-SDP Inter-IMS NNI profile?

It specifies SIP methods and headers, message transport and signalling modes, and media control using SIP SDP offer/answer. It also covers RTP profiles, codecs, and how SDP contents and early media are handled.

How are SIP headers and methods handled according to the document structure?

The document includes sections dedicated to SIP method handling, SIP status code handling, and SIP header handling. It further breaks down SIP requests, SIP responses, and provides summary and per-method/response header support.

What additional examples are provided for readers?

Annex A includes SIP header examples (informational). Annex B includes SIP message examples (informational), covering use cases such as voice and multi-media session establishment and teardown and other session behaviors.

Aug 30, 2026

Upload by Fahsai