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  ITU-T A.5 justification information for referenced document IEEE 1588-2002 in draft Y.1731
1. Clear description of the referenced document:
Name: IEEE 1588-2002
Title: Standard for Synchronizing Clocks - This standard defines a protocol to synchronize independent clocks running on separate nodes of a distributed measurement and control system to a high degree of accuracy and precision. The protocol is independent of the networking technology, and the system topology is self-configuring.
2. Status of approval:
Approved as standard.
3. Justification for the specific reference:
Y.1731 specifies time stamps for some Ethernet OAM functions. The time stamp format is defined in IEEE1588.
4. Current information, if any, about IPR issues:
No known issues.
5. Other useful information describing the "Quality" of the document:
IEEE standard since 2002.
6. The degree of stability or maturity of the document:
IEEE standard since 2002.
7. Relationship with other existing or emerging documents:
None
8. Any explicit references within that referenced document should also be listed:
IEEE Std 802.3-2002, Information technology-Telecommunications and information exchange between systems-Local and metropolitan area networks-Specific requirements-Part 3: Carrier sense multiple access with collision detection (CSMA/CD) access method and physical layer specifications./
ISO 8601:2000, Data elements and interchange formats-Information interchange-Representation of dates and times./
ISO/IEC 8859-1:1998, Information technology-8-bit single-byte coded graphic character sets-Part 1: Latin alphabet No. 1
9. Qualification of IEEE:
The IEEE was recognized under the provisions of ITU-T Recommendation A.5 on 1 November 1999. Qualifying information is on file with TSB.
10. Other (for any supplementary information):
None
Note: This form is based on Recommendation ITU-T A.5