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  ITU-T A.5 justification information for referenced document ETSI TS 103 653-2 V2.1.1 (2022-01) in draft Q.4073
1. Clear description of the referenced document:
Name: ETSI TS 103 653-2 V2.1.1 (2022-01)
Title: Core Network and Interoperability Testing (INT); VoLTE/ViLTE interoperability test description over 4G/early 5G in physical/virtual environments; (3GPP™ Release 15); Part 2: Test Descriptions for VoLTE/ViLTE interoperability
2. Status of approval:
It is approved and published by ETSI.
3. Justification for the specific reference:
It used as a reference for VoLTE/ViLTE interoperability test description over 4G/early 5G in physical/virtual environments; (3GPP™ Release 15); Part 2: Test Descriptions for VoLTE/ViLTE interoperability
4. Current information, if any, about IPR issues:
See: https://ipr.etsi.org/.
5. Other useful information describing the "Quality" of the document:
The status of the referred ETSI document is approved standard.
6. The degree of stability or maturity of the document:
The status of the referred ETSI document is published standard.
7. Relationship with other existing or emerging documents:
None
8. Any explicit references within that referenced document should also be listed:
[1] ETSI TS 103 653-1: "Core Network and Interoperability Testing (INT); VoLTE/ViLTE/
interoperability test description over 4G/early 5G in physical/virtual environments; (3GPP™/
Release 15); Part 1: Test Purposes (TP) and Protocol Implementation Conformance Statement/
(PICS) for VoLTE/ViLTE interoperability"./
[2] ETSI TS 124 229: "Digital cellular telecommunications system (Phase 2+) (GSM); Universal/
Mobile Telecommunications System (UMTS); LTE; 5G; IP multimedia call control protocol based/
on Session Initiation Protocol (SIP) and Session Description Protocol (SDP); Stage 3 (3GPP/
TS 24.229 Release 15)"./
[3] ETSI TS 129 165: "Digital cellular telecommunications system (Phase 2+) (GSM); Universal/
Mobile Telecommunications System (UMTS); LTE; 5G; Inter-IMS Network to Network Interface/
(NNI) (3GPP TS 29.165 Release 15)"./
[4] ETSI TS 129 228: "Digital cellular telecommunications system (Phase 2+) (GSM); Universal/
Mobile Telecommunications System (UMTS); LTE; IP Multimedia (IM) Subsystem Cx and Dx/
Interfaces; Signalling flows and message contents (3GPP TS 29.228 Release 15)"./
[5] ETSI TS 129 229: "Digital cellular telecommunications system (Phase 2+) (GSM); Universal/
Mobile Telecommunications System (UMTS); LTE; Cx and Dx interfaces based on the Diameter/
protocol; Protocol details (3GPP TS 29.229 Release 15)"./
[6] ETSI TS 129 214: "Universal Mobile Telecommunications System (UMTS); LTE; Policy and/
charging control over Rx reference point (3GPP TS 29.214 Release 15)"./
[7] ETSI TS 129 212: "Universal Mobile Telecommunications System (UMTS); LTE; Policy and/
Charging Control (PCC); Reference points (3GPP TS 29.212 Release 15)"./
[8] ETSI TS 129 272: "Universal Mobile Telecommunications System (UMTS); LTE; 5G; Evolved/
Packet System (EPS); Mobility Management Entity (MME) and Serving GPRS Support Node/
(SGSN) related interfaces based on Diameter protocol (3GPP TS 29.272 Release 15)"./
[9] ETSI TS 129 215: "Digital cellular telecommunications system (Phase 2+) (GSM); Universal/
Mobile Telecommunications System (UMTS); LTE; Policy and Charging Control (PCC) over S9/
reference point; Stage 3 (3GPP TS 29.215 Release 15)"/
[10] ETSI TS 129 328: "Digital cellular telecommunications system (Phase 2+) (GSM); Universal/
Mobile Telecommunications System (UMTS); LTE; 5G; IP Multimedia (IM) Subsystem Sh/
interface; Signalling flows and message contents (3GPP TS 29.328 Release 15)"./
[11] ETSI TS 129 329: "Digital cellular telecommunications system (Phase 2+) (GSM); Universal/
Mobile Telecommunications System (UMTS); LTE; Sh interface based on the Diameter protocol;/
Protocol details (3GPP TS 29.329 Release 15)"./
[12] IETF RFC 3261: "SIP: Session Initiation Protocol"./
[13] ETSI TS 134 229-1: "Universal Mobile Telecommunications System (UMTS); LTE; Internet/
Protocol (IP) multimedia call control protocol based on Session Initiation Protocol (SIP) and/
Session Description Protocol (SDP); User Equipment (UE) conformance specification;/
Part 1: Protocol conformance specification (3GPP TS 34.229-1 Release 15)".
9. Qualification of ETSI:
ETSI is recognized under the provisions of ITU-T Recommendations A.5 and A.6. Qualifying information is on file at TSB.
10. Other (for any supplementary information):
None
Note: This form is based on Recommendation ITU-T A.5