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  ITU-T A.5 justification information for referenced document ETSI TS 129 658 V10.1.0 (2012-07) in draft Q.3640
1. Clear description of the referenced document:
Name: ETSI TS 129 658 V10.1.0 (2012-07)
Title: Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); LTE; SIP Transfer of IP Multimedia Service Tariff Information; Protocol specification (3GPP TS 29.658 version 10.1.0 Release 10)
2. Status of approval:
ETSI TS 129.658 was published in 2012-07. 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 129.658 was published in 2012-07. It is an ETSI standard document.
6. The degree of stability or maturity of the document:
7. Relationship with other existing or emerging documents:
8. Any explicit references within that referenced document should also be listed:
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