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  ITU-T A.5 justification information for referenced document ETSI TS 124 615 V10.6.0 (2015-07) in draft Q.3622 v.1
1. Clear description of the referenced document:
Name: ETSI TS 124 615 V10.6.0 (2015-07)
Title: Digital cellular telecommunications system (Phase 2+);Universal Mobile Telecommunications System (UMTS);LTE;Communication Waiting (CW) using IP Multimedia (IM) Core Network (CN) subsystem
2. Status of approval:
Normative; ETSI TS 124.615 was published in 2015-07. It is an ETSI standard document
3. Justification for the specific reference:
ETSI TS 124 615 V10.6.0 (2015-07) is used as a reference in Q.3622 V.1
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 124.615 was published in 2015-07. It is an ETSI standard document
6. The degree of stability or maturity of the document:
ETSI TS 124.615 was published in 2015-07. It is an ETSI standard document
7. Relationship with other existing or emerging documents:
[2] 3GPP TS 24.229: "INTERNET PROTOCOL (IP) MULTIMEDIA CALL CONTROL PROTOCOL BASED ON SESSION INITIATION PROTOCOL (SIP) AND SESSION DESCRIPTION PROTOCOL (SDP); STAGE 3". [4] 3GPP TS 24.628: "COMMON BASIC COMMUNICATION PROCEDURES USING IP MULTIMEDIA (IM) CORE NETWORK (CN) SUBSYSTEM; PROTOCOL SPECIFICATION". [5] 3GPP TS 24.610: "COMMUNICATION HOLD (HOLD) 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 22.173: "IP Multimedia Core Network Subsystem (IMS) Multimedia Telephony Service/
and supplementary services; Stage 1"./
[2] 3GPP TS 24.229: "Internet Protocol (IP) multimedia call control protocol based on Session/
Initiation Protocol (SIP) and Session Description Protocol (SDP); Stage 3"./
[3] Void./
[4] 3GPP TS 24.628: "Common Basic Communication procedures using IP Multimedia (IM) Core/
Network (CN) subsystem; Protocol specification"./
[5] 3GPP TS 24.610: "Communication HOLD (HOLD) using IP Multimedia (IM) Core Network (CN)/
subsystem; Protocol specification"./
[6] 3GPP TS 22.228: "Service requirements for the Internet Protocol (IP) multimedia core network/
subsystem (IMS); Stage 1"./
[7] 3GPP TS 24.623: "Extensible Markup Language (XML) Configuration Access Protocol (XCAP)/
over the Ut interface for Manipulating Supplementary Services"./
[8] RFC 7462 (March 2015): "URNs for the Alert-Info Header Field of the Session Initiation Protocol/
(SIP)"./
[9] RFC 5621 (September 2009): "Message Body Handling in the Session Initiation Protocol (SIP)"./
[10] 3GPP TS 24.238: "Session Initiation Protocol (SIP) based user configuration"./
[11] RFC 6432: "Carrying Q.850 Codes in Reason Header Fields in SIP (Session Initiation Protocol)/
Responses"./
[12] RFC 3326 (December 2002): "The Reason Header Field for the Session Initiation Protocol (SIP)"./
[13] RFC 3023 (January 2001): "XML Media Types"./
[14] RFC 4244 (November 2005): "An Extension to the Session Initiation Protocol (SIP) for Request/
History Info".
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 124.615 the reference should always be made by ETSI number
Note: This form is based on Recommendation ITU-T A.5