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  ITU-T A.5 justification information for referenced document ETSI TS 124 628 V10.4.0 (2013-01) in draft Q.3640
1. Clear description of the referenced document:
Name: ETSI TS 124 628 V10.4.0 (2013-01)
Title: Digital cellular telecommunications system (Phase 2+);Universal Mobile Telecommunications System (UMTS);LTE;Common Basic Communication procedures using IP Multimedia (IM) Core Network (CN) subsystem
2. Status of approval:
ETSI TS 124.628 was published in 2013-01. 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 124.628 was published in 2013-01. It is an ETSI standard document.
6. The degree of stability or maturity of the document:
ETSI TS 124.628 was published in 2013-01. It is an ETSI standard document.
7. Relationship with other existing or emerging documents:
[1] 3GPP TS 24.229: "IP MULTIMEDIA CALL CONTROL PROTOCOL BASED ON SIP AND SDP".. [4] IETF RFC 3261: "SIP: SESSION INITIATION PROTOCOL". [9] 3GPP TS 29.163: "INTERWORKING BETWEEN THE IP MULTIMEDIA (IM) CORE NETWORK (CN) SUBSYSTEM AND CIRCUIT SWITCHED (CS) NETWORKS".
8. Any explicit references within that referenced document should also be listed:
[1] 3GPP TS 24.229: "IP MULTIMEDIA CALL CONTROL PROTOCOL BASED ON SIP AND SDP"../
[2] VOID./
[3] VOID./
[4] IETF RFC 3261: "SIP: SESSION INITIATION PROTOCOL"./
[5] IETF RFC 3262: "RELIABILITY OF PROVISIONAL RESPONSES IN THE SESSION INITIATION PROTOCOL (SIP)"./
[6] IETF RFC 3960: "EARLY MEDIA AND RINGING TONE GENERATION IN THE SESSION INITIATION PROTOCOL (SIP)"./
[7] ETSI TS 181 005: "TELECOMMUNICATIONS AND INTERNET CONVERGED SERVICES AND PROTOCOLS FOR ADVANCED NETWORKING (TISPAN); SERVICE AND CAPABILITY REQUIREMENTS"./
[8] VOID./
[9] 3GPP TS 29.163: "INTERWORKING BETWEEN THE IP MULTIMEDIA (IM) CORE NETWORK (CN) SUBSYSTEM AND CIRCUIT SWITCHED (CS) NETWORKS"./
[10] VOID./
[11] ITU-T RECOMMENDATION I.112: "VOCABULARY OF TERMS FOR ISDNS"./
[12] IETF RFC 5009: "PRIVATE HEADER (P-HEADER) EXTENSION TO THE SESSION INITIATION PROTOCOL (SIP) FOR AUTHORIZATION OF EARLY MEDIA"./
[13] IETF RFC 3515: "THE SESSION INITIATION PROTOCOL (SIP) REFER METHOD"./
[14] IETF RFC 3725: "BEST CURRENT PRACTICES FOR THIRD PARTY CALL CONTROL (3PCC) IN THE SESSION INITIATION PROTOCOL (SIP)"./
[15] 3GPP TS 24.607: "ORIGINATING IDENTIFICATION PRESENTATION (OIP) AND ORIGINATING IDENTIFICATION RESTRICTION (OIR) USING IP MULTIMEDIA (IM)CORE NETWORK (CN) SUBSYSTEM; PROTOCOL SPECIFICATION"./
[16] VOID./
[17] ETSI TS 183 028 V2.4.0: "TELECOMMUNICATIONS AND INTERNET CONVERGED SERVICES AND PROTOCOLS FOR ADVANCED NETWORKING (TISPAN); COMMON BASIC COMMUNICATION PROCEDURES; PROTOCOL SPECIFICATION"./
[18] IETF RFC 6228 (MAY 2011): "RESPONSE CODE FOR INDICATION OF TERMINATED DIALOG"./
[19] IETF RFC 3840: "INDICATING USER AGENT CAPABILITIES IN THE SESSION INITIATION PROTOCOL (SIP)"/
[20] IETF RFC 4596: "GUIDELINES FOR USAGE OF THE SESSION INITIATION PROTOCOL (SIP) CALLER PREFERENCES EXTENSION/
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 124.628 the reference should always be made by ETSI number.
Note: This form is based on Recommendation ITU-T A.5