TS 29.165 – Inter-IMS Network-to-Network Interface (II-NNI)
3GPP TS 29.165 is the 3GPP Technical Specification for Inter-IMS Network-to-Network Interface (II-NNI). Its official 3GPP title is “Inter-IMS Network to Network Interface (NNI)”. It is published in 13 releases (Rel-8 to Rel-20); the latest version is 20.0.0 in Rel-20.
Defines the Ici and Izi interfaces enabling interoperable IMS services between independent IMS networks, including SIP/SDP, security, media, numbering, charging, and emergency support.
Releases and versions of TS 29.165
| Release | Latest version | Links |
|---|---|---|
| Rel-20 | 20.0.0 | Read · Download (3GPP) |
| Rel-19 | 19.3.0 | Read · Download (3GPP) |
| Rel-18 | 18.3.0 | Read · Download (3GPP) |
| Rel-17 | 17.6.0 | Read · Download (3GPP) |
| Rel-16 | 16.6.0 | Read · Download (3GPP) |
| Rel-15 | 15.13.0 | Read · Download (3GPP) |
| Rel-14 | 14.15.0 | Read · Download (3GPP) |
| Rel-13 | 13.16.0 | Read · Download (3GPP) |
| Rel-12 | 12.22.0 | Read · Download (3GPP) |
| Rel-11 | 11.26.0 | Read · Download (3GPP) |
| Rel-10 | 10.22.0 | Read · Download (3GPP) |
| Rel-9 | 9.21.0 | Read · Download (3GPP) |
| Rel-8 | 8.12.0 | Read · Download (3GPP) |
Scope of TS 29.165
Category: Core Network (IMS). Technology generation: Multi-Gen. Network layer: CoreNetwork.
Who should read this specification?
- Network operators
- Device manufacturers
- Regulators and standards bodies
- Researchers and academics
Implementation notes
Complexity level: Expert. Implementation difficulty: High.
Key technologies
Specifications referenced by TS 29.165
- TS 24.238 SIP-based user configuration of supplementary services
- TS 24.239 Flexible Alerting Protocol for IMS
- TS 24.654 Closed User Group (CUG) supplementary service
- TS 24.605 3GPP CONF Service Protocol Specification
- TS 24.147 IMS Conferencing Protocol Details
- TS 24.642 CCBS/CCNR/CCNL SIP Protocol Specification
- TS 33.210 Network Domain Security for IP Networks
- TS 24.606 MWI Service Protocol Description
- TS 24.608 Terminating Identification Presentation (TIP) and Terminating Identification Restriction (TIR) using IP Multimedia (IM) Core Network (CN) subsystem; Protocol specification
- TS 24.611 Anonymous Communication Rejection & Barring
- TS 24.629 Explicit Communication Transfer (ECT) Protocol
- TS 24.604 Communications Diversion (CDIV) Protocol Spec
Specifications that reference TS 29.165
Other specifications in the 29 series
- TS 29.161 3GPP-WLAN Interworking Requirements
- TS 29.162 IMS-IP Network Interworking
- TS 29.163 Interworking between 3GPP IM CN and CS networks
- TS 29.164 CS-LTE Interworking with SIP-I, BICC, ISUP
- TS 29.168 SBc-AP Protocol Specification
- TS 29.171 LCS-AP between MME and E-SMLC (SLs)
- TS 29.172 EPC LCS Protocol (ELP) specification
- TS 29.173 Diameter-based SLh Interface for LCS
Frequently asked questions
What is 3GPP TS 29.165?
3GPP TS 29.165 is the 3GPP Technical Specification for Inter-IMS Network-to-Network Interface (II-NNI). Defines the Ici and Izi interfaces enabling interoperable IMS services between independent IMS networks, including SIP/SDP, security, media, numbering, charging, and emergency support.
Which 3GPP releases include TS 29.165?
TS 29.165 is published in 13 releases, from Rel-8 to Rel-20. The latest version on 3GPP Explorer is 20.0.0 (Rel-20).
What category does TS 29.165 belong to?
TS 29.165 belongs to the Core Network (IMS) category of 3GPP specifications. It applies to Multi-Gen networks.
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