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ITU-T G.8271

Time and phase synchronization aspects of packet networks

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Organization: ITU-T
Publication Date: 1 July 2016
Status: inactive
Page Count: 42
scope:

This Recommendation defines time and phase synchronization aspects in packet networks. It specifies the suitable methods to distribute the reference timing signals that can be used to recover the phase synchronization and/or time synchronization according to the required quality. It also specifies the relevant time and phase synchronization interfaces and related performance.

The packet networks that are in the scope of this Recommendation are currently limited to the following scenarios:

• Ethernet ([IEEE 802.3] and [IEEE 802.1Q]).

• MPLS ([IETF RFC 3031] and [ITU-T G.8110]).

• IP ([IETF RFC 791] and [RFC 2460]).

The physical layers that are relevant to this specification are the Ethernet media types, as defined in [IEEE 802.3]

Document History

ITU-T G.8271
March 1, 2020
Time and phase synchronization aspects of telecommunication networks
This Recommendation defines time and phase synchronization aspects in telecommunication networks. It specifies the suitable methods to distribute the reference timing signals that can be used to...
ITU-T G.8271
November 1, 2018
Time and phase synchronization aspects of telecommunication networks Amendment 2
A description is not available for this item.
ITU-T G.8271
March 1, 2018
Time and phase synchronization aspects of telecommunication networks Amendment 1
A description is not available for this item.
ITU-T G.8271
August 1, 2017
Time and phase synchronization aspects of telecommunication networks
This Recommendation defines time and phase synchronization aspects in telecommunication networks. It specifies the suitable methods to distribute the reference timing signals that can be used to...
ITU-T G.8271
July 1, 2016
Time and phase synchronization aspects of packet networks
This Recommendation defines time and phase synchronization aspects in packet networks. It specifies the suitable methods to distribute the reference timing signals that can be used to recover the...
ITU-T G.8271
January 1, 2015
Time and phase synchronization aspects of packet networks Amendment 2
A description is not available for this item.
ITU-T G.8271
August 1, 2013
Time and phase synchronization aspects of packet networks Amendment 1
A description is not available for this item.
ITU-T G.8271
February 1, 2012
Time and phase synchronization aspects of packet networks
A description is not available for this item.
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References

This document references:
IEEE 802.3 - Standard for Ethernet Amendment 4: Physical Layers and Management Parameters for 50 Gb/s, 200 Gb/s, and 400 Gb/s Operation over Single‐Mode Fiber
Published by IEEE on November 7, 2019
Abstract: This amendment to IEEE Std 802.3-2018 adds Physical Layer (PHY) specifications and management parameters for 50 Gb/s, 200 Gb/s, and 400 Gb/s operation over single-mode fiber with reaches of...
This document references:
ITU-T Y.1361 - Timing and synchronization aspects in packet networks Amendment 1
Published by ITU-T on March 1, 2020
A description is not available for this item.
This document references:
X.27 - Electrical Characteristics for Balanced Double-Current Interchange Circuits for General Use with Integrated Circuits Equipment in the Field of Data Communications - Data Communications Networks: Services and Facilities, Interchange (Study Group VII) 1 pp
Published by ITU-T on January 1, 1989
A description is not available for this item.
This document references:
ITU-T V.11 - Electrical Characteristics for Balanced Double-Current Interchange Circuits Operating at Data Signalling Rates up to 10 Mbit/s - Series V: Data Communication over the Telephone Network Interfaces and Voiceband Modems
Published by ITU-T on October 1, 1996
A description is not available for this item.
This document references:
ITU-T G.8271.1 - Network limits for time synchronization in packet networks with full timing support from the network Amendment 1
Published by ITU-T on October 1, 2020
This Recommendation specifies the maximum network limits of phase and time error that shall not be exceeded. It specifies the minimum equipment tolerance to phase and time error that shall be...
This document is referenced by:
ITU-T Y.1367 - Timing characteristics of primary reference time clocks Amendment 1
Published by ITU-T on March 1, 2020
A description is not available for this item.
This document is referenced by:
ITU-T G.8273.2 - Timing characteristics of telecom boundary clocks and telecom time slave clocks for use with full timing support from the network
Published by ITU-T on October 1, 2020
This Recommendation specifies minimum requirements for time and phase synchronization devices used in synchronization network equipment that operates in the network architecture as defined in [ITU-T...
This document is referenced by:
ITU-T G.8272.1 - Timing characteristics of enhanced primary reference time clocks Amendment 1
Published by ITU-T on August 1, 2017
A description is not available for this item.
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