�1���� Scope����������
�2���� References
�3���� Definitions
������� 3.1���� Terms defined elsewhere�������
������� 3.2���� Terms defined in this Recommendation�����������
�4���� Abbreviations and acronyms�������������
�5���� Conventions������������
�6���� Use of PTP for phase/time distribution���������
������� 6.1���� High-level design requirements�����������
������� 6.2���� PTP modes and options�����������
������� 6.3���� PTP modes����
������� 6.4���� PTP mapping
������� 6.5���� Message rates�������������
������� 6.6���� Unicast message negotiation
������� 6.7���� Alternate BMCA, telecom slave model and master selection
process���
������� 6.8���� Phase/time traceability information���
������� 6.9���� Use of alternate master flag���
�7���� ITU-T PTP profile for phase/time distribution with partial timing support
from the network����
�8���� Security aspects�����
Annex A � ITU-T PTP profile for time distribution with partial timing support
from the network (unicast mode)����
������� A.1���� Profile identification�
������� A.2���� PTP attribute values��
������� A.3���� PTP options��
������� A.4���� Best master clock algorithm options��
������� A.5���� Path delay measurement option (delay request/delay response)����������
������� A.6���� Configuration management options��
������� A.7���� Clock identity format
������� A.8���� Security aspects����������
������� A.9���� Other optional features of IEEE 1588��
������ A.10���� PTP common header flags�����
Annex B � Options to establish the PTP topology with the Alternate BMCA����
Annex C � Inclusion of an external phase/time input interface on a PTP
clock����
Annex D � TLV for PTP interface rate (optional)����
Annex E � Synchronization uncertain indication (optional)����
Annex F � Mapping from PTP clockClass values to quality levels����
Appendix I � Considerations on the use of priority2����
Appendix II � Considerations on a T-TSC-A or T-TSC-P connected to an end
application����
Appendix III � PTP monitoring backup scenario example����
Appendix IV � Description of PTP clock states and associated contents of
Announce messages����
������ IV.1 ����Purpose of the appendix���������
������ IV.2���� Description of the states���������
������ IV.3���� Example of mapping between PTP port states and PTP clock states
for a 3-port T-BC����
������ IV.4���� T-GM Announce message contents based on the internal PTP clock
states��������
������ IV.5���� T-BC Announce message contents based on the internal PTP clock
states����������
Appendix V � BMCA cycling between masters����
������� V.1���� Scenario where a PTP clock's BMCA cycles between two masters���������
������� V.2���� Approaches to avoid a PTP clock's BMCA from cycling between two
masters���
Appendix VI � Considerations of PTP over IP transport in ring topologies����
Appendix VII � Considerations on the configuration of PTSF-lossSync����