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  ITU-T A.5 justification information for referenced document ETSI TS 124 629 V10.2.0 (2013-04) in draft Q.3640
1. Clear description of the referenced document:
Name: ETSI TS 124 629 V10.2.0 (2013-04)
Title: Digital cellular telecommunications system (Phase 2+);Universal Mobile Telecommunications System (UMTS);LTE;Explicit Communication Transfer (ECT) using IP Multimedia (IM) Core Network (CN) subsystem
2. Status of approval:
Normative; ETSI TS 124.629 was published in 2013-04. It is an ETSI standard document.
3. Justification for the specific reference:
It is used as a reference in the Recommendation ITU-T Q.30xx_VoLTE_Interconnection_FW
4. Current information, if any, about IPR issues:
Information about IPR could be available for ETSI members and non-members and found in SR 000 314: „Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respect of ETSI standards“, which is available free of charge from the ETSI Secretariat and on the ETSI web site http://www.etsi.org/ipr.
5. Other useful information describing the "Quality" of the document:
ETSI TS 124.629 was published in 2013-04. It is an ETSI standard document.
6. The degree of stability or maturity of the document:
ETSI TS 124.629 was published in 2013-04. It is an ETSI standard document.
7. Relationship with other existing or emerging documents:
[1] 3GPP TS 24.229: "INTERNET PROTOCOL (IP) MULTIMEDIA CALL CONTROL PROTOCOL BASED ON SESSION INITIATION PROTOCOL (SIP) AND SESSION DESCRIPTION PROTOCOL (SDP); STAGE 3". [7A] 3GPP TS 29.229: "CX AND DX INTERFACES BASED ON THE DIAMETER PROTOCOL; PROTOCOL DETAILS". [8] 3GPP TS 24.610: "COMMUNICATION HOLD (HOLD) USING IP MULTIMEDIA (IM) CORE NETWORK (CN) SUBSYSTEM; PROTOCOL SPECIFICATION". [9] 3GPP TS 24.605: "CONFERENCE (CONF) USING IP MULTIMEDIA (IM) CORE NETWORK (CN) SUBSYSTEM; PROTOCOL SPECIFICATION".
8. Any explicit references within that referenced document should also be listed:
[1] 3GPP TS 24.229: "INTERNET PROTOCOL (IP) MULTIMEDIA CALL CONTROL PROTOCOL BASED ON SESSION INITIATION PROTOCOL (SIP) AND SESSION DESCRIPTION PROTOCOL (SDP); STAGE 3"./
[2] IETF RFC 3515: "THE SESSION INITIATION PROTOCOL (SIP) REFER METHOD"./
[3] IETF RFC 3892: "THE SESSION INITIATION PROTOCOL (SIP) REFERRED-BY MECHANISM"./
[4] IETF RFC 3891: "THE SESSION INITIATION PROTOCOL (SIP) "REPLACES" HEADER"./
[5] VOID./
[6] IETF RFC 3261: "SIP: SESSION INITIATION PROTOCOL"./
[7] 3GPP TS 29.228: "IP MULTIMEDIA (IM) SUBSYSTEM CX AND DX INTERFACES; SIGNALLING FLOWS AND MESSAGE CONTENTS"./
[7A] 3GPP TS 29.229: "CX AND DX INTERFACES BASED ON THE DIAMETER PROTOCOL; PROTOCOL DETAILS"./
[8] 3GPP TS 24.610: "COMMUNICATION HOLD (HOLD) USING IP MULTIMEDIA (IM) CORE NETWORK (CN) SUBSYSTEM; PROTOCOL SPECIFICATION"./
[9] 3GPP TS 24.605: "CONFERENCE (CONF) USING IP MULTIMEDIA (IM) CORE NETWORK (CN) SUBSYSTEM; PROTOCOL SPECIFICATION"./
[10] 3GPP TS 24.628: "COMMON BASIC COMMUNICATION PROCEDURES USING IP MULTIMEDIA (IM) CORE NETWORK (CN) SUBSYSTEM; PROTOCOL SPECIFICATION"./
[11] ETSI TS 183 029 V2.5.0: "TELECOMMUNICATIONS AND INTERNET CONVERGED SERVICES AND PROTOCOLS FOR ADVANCED NETWORKING (TISPAN); PSTN/ISDN SIMULATION SERVICES: EXPLICIT COMMUNICATION TRANSFER (ECT); PROTOCOL SPECIFICATION"./
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):
If the Study Group decides to make the reference to the ETSI TS 124.629 the reference should always be made by ETSI number.
Note: This form is based on Recommendation ITU-T A.5