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  ITU-T A.5 justification information for referenced document IETF RFC 3312 (2002) in draft Q.3640
1. Clear description of the referenced document:
Name: IETF RFC 3312 (2002)
Title: Integration of Resource Management and Session Initiation Protocol (SIP), October 2002
2. Status of approval:
Approved
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 on IPR issues regarding RFCs is available at: https://datatracker.ietf.org/ipr/search/. Specifically: https://datatracker.ietf.org/ipr/search/?option=rfc_search&rfc_search=3312
5. Other useful information describing the "Quality" of the document:
This RFC has been in existence since October 2002. This text is a Proposed Standard.
6. The degree of stability or maturity of the document:
RFC 3312 was published in October, 2002. It is a standards-track document and is currently in the "Proposed Standard" state. Current standards status of this document can be found at ftp://ftp.isi.edu/in-notes/std/std1.txt
7. Relationship with other existing or emerging documents:
RFC 3312 defines a generic framework for preconditions, which are extensible through IANA registration. This RFC also discusses how network quality of service can be made a precondition for establishment of sessions initiated by the Session Initiation Protocol (SIP), and, is expected to be widely used.
8. Any explicit references within that referenced document should also be listed:
[1] Rosenberg, J., Schulzrinne, H., Camarillo, G., Johnston, A., Peterson, J., Sparks, R., Handley, M. and E. Schooler, "SIP: Session Initiation Protocol", RFC 3261, June 2002./
[2] Handley, M. and V. Jacobson, "SDP: Session Description Protocol", RFC 2327, April 1998./
[3] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, March 1997./
[4] Rosenberg, J. and H. Schulzrinne, "An Offer/Answer Model with Session Description Protocol (SDP)", RFC 3264, June 2002./
[5] Rosenberg, J., "The Session Initiation Protocol (SIP) UPDATE Method," RFC 3311, September 2002./
[6] Schulzrinne, S., Casner, S., Frederick, R. and V. Jacobson, "RTP: A Transport Protocol for Real-Time Applications", RFC 1889, January 1996./
[7] Rosenberg, J. and H. Schulzrinne, "Reliability of Provisional Responses in Session Initiation Protocol (SIP)", RFC 3262, June 2002./
[8] C. Kalmanek, W. Marshall, P. Mishra, D. Nortz, and K. K. Ramakrishnan, "DOSA: an architecture for providing robust IP telephony service," in Proceedings of the Conference on Computer Communications (IEEE Infocom), (Tel Aviv, Israel), Mar. 2000.
9. Qualification of ISOC/IETF:
9.1-9.6     Decisions of ITU Council to admit ISOC to participate in the work of the Sector (June 1995 and June 1996).
9.7     The Internet Engineering Steering Group (IESG) is responsible for ongoing maintenance of the RFCs when the need arises. Comments on RFCs and corresponding changes are accommodated through the existing standardization process.
9.8     Each revision of a given RFC has a different RFC number, so no confusion is possible. All RFCs always remain available on-line. An index of RFCs and their status may be found in the IETF archives at http://www.rfc-editor.org/rfc.html.
10. Other (for any supplementary information):
References should always be made to RFC numbers (and not by other designations such as STD, BCP, etc.). References not to be made to documents referred to as "Internet Drafts" or RFCs categorized as "Historic". Normative references should not be made to RFCs that are not standards, for example, "Informational" and "Experimental" RFCs.
Note: This form is based on Recommendation ITU-T A.5