IEEE 1588 ptp and SyncE

https://www.ipinfusion.com/documentation/application-notes/

Why it's important
	Slip in phase and frequency is detrimental to normal operation in mobile TDD (Time Division Duplex) band causing inter-cell interference and eventually effecting call degradation and hand-off coordination
PtP
	PTP leverages hardware time stamping of PTP PDUs to achieve sub-100 nanosecond level accuracy while filtering dynamic time error accumulation along the way
The version 2 of IEEE 1588
	introduces the concept of “profile”
G.8265.1	ITU-T G.8265.1 telecom profile is specified for frequency synchronization >>> G.8275.1 Full Timing Support (FTS)
G.8265.2	ITU-T G.8275.1/G.8275.2 are for phase/time synchronization >>> G.8275.2 Partial timing support (PTS) >>> G.8275.2 Assisted Partial timing support (APTS) >>> E2E Transparent Clock , PTP Master
Diagram

PtP config	Attached to GM clock on ce44
	SyncE Config Expand source show runn ptp ! ptp clock 0 profile g8275.1 number-ports 5 system-clock-sync 30 clock-port 1 network-interface ce44 exit clock-port 2 master-only network-interface ce1 exit clock-port 4 master-only network-interface ce3 exit
	uk-wnlb-lg-pol-cin-01(config-clk-port)#2024 Jul 19 11:03:11.566 : uk-wnlb-lg-pol-cin-01 : HSL : CRITI : [PTP_SERVO_STATE_2]: Phase Locked. -> Holdover in Spec.
	show ptp servo uk-wnlb-lg-pol-cin-01#show ptp servo PTP servo status for clock 0 Servo Config : Freq + Phase Correction Servo State : Holdover-in-spec Servo State Duration : 00:03:51 Servo APTS Mode : N/A Frequency Correction : 0.000 ppb Phase Correction : 977250000.000 nsec Offset From Master : 0 nsec Mean Path Delay : 13 nsec APTS GPS to PTP Offset : N/A Sync Packet Rate : 16 Delay Packet Rate : 16
	show ptp clock 0