IEEE "Telecom Profile 2008"

Latest document version:	IEEE1588-2008, Annex A.9
Location:	https://standards.ieee.org/standard/1588-2008.html
Objective:	Frequency distribution to better than 16ppb

Feature/ Parameter	Note	Range		Default Value	IEEE1588-2008 Clause
Feature/ Parameter	Note	from	to	Default Value	IEEE1588-2008 Clause
Profile Identification
profileName:	Recommendation for implementations in unicast networks or networks with non-PTP bridges and routers. This is an informal but often implemented profile, based on the "default" profile in Annex J.3.				Annex A.9
profileVersion:	1.0				Annex J.3.1
profileIdentifier:	00-1B-19-00-01-00				Annex J.3.1
Specified by:	Precise Networked Clock Synchronization Working Group of the IM/ST Committee of the IEEE				Annex J.3.1
Location:	https://standards.ieee.org/standard/1588-2008.html				Annex J.3.1
PTP Options
Permitted Nodes	Ordinary clocks (i.e. Grandmasters, slave-only clocks), boundary clocks, transparent clocks				Annex A.9.1
Prohibited Nodes	None				Annex A.9.1
Transport Mechanisms	Not specified. Any valid unicast transport mechanism may be used, e.g. as specified in Annexes D to I of IEEE1588				Annexes D to I
Multicast or Unicast	All messages are sent in unicast. Unicast negotiation is used by default, but a management procedure could be used.				Annex A.9.3, A.9.4.2
BMCA	Default BMCA, as specified in clause 9.3.2.				Annex A.9.4.1, J.3.3
Path Delay Measurement	Uses delay_request/response mechanism by default. Peer delay mechanism is optional.				Annex A.9.4.2, J.3.3
PTP Management	Optional.				Annex A.9.4.1
Clock Identity	Standard PTP behaviour				7.5.2.2
Message Types	Used: Announce, Sync, Follow-up, Delay_Req, Delay_Resp, Signaling Not used: Pdelay_Req, Pdelay_Resp, Pdelay_Resp_Follow_Up The use of Management messages is permitted.				Annex A.9.4.2
One-step and Two-step clock	Standard PTP behaviour.
One-way and Two-way Operation	Standard PTP behaviour.
Security	Not mentioned.
Unicast negotiation (IEEE1588-2008 clause 16.1)	Used by default.				Annex A.9.4.2
Path trace (IEEE1588-2008 clause 16.2)	Optional.				Annex A.9.3
Alternate timescales (IEEE1588-2008 clause 16.3)	Not mentioned.
Grandmaster clusters (IEEE1588-2008 clause 17.3)	Permitted, inactive by default				Annex J.3.3
Alternate masters (IEEE1588-2008 clause 17.4)	Permitted, inactive by default				Annex J.3.3
Unicast discovery (IEEE1588-2008 clause 17.5)	Used by default.				Annex A.9.4.2
Acceptable master table (IEEE1588-2008 clause 17.6)	Permitted, inactive by default				Annex J.3.3
Cumulative frequency scale factor offset (IEEE1588-2008 Annex L)	Not mentioned.
Message Rates
Sync & Follow-up	1 every 2 seconds to 128 per second, default 16 per second	1/2	128	16	A.9.4.2
Delay_request/response	1 every 64 seconds to 128 per second, default 16 per second	1/64	128	16
Announce	1 every 8 seconds to 8 per second; default 1 every 2 seconds	1/8	8	1/2
Peer Delay_request/response	None (uses Delay_request/response mechanism)
Signaling	As required for unicast negotiation
Management	Permitted
PTP Configurable Attribute Values (all others as per PTP, defined in IEEE1588-2008)
Default data set
twoStepFlag	Standard PTP behaviour.
clockIdentity	Standard PTP behaviour.
numberPorts	Standard PTP behaviour.
clockQuality.clockClass	Standard PTP behaviour.
clockQuality.clockAccuracy	Standard PTP behaviour.
clockQuality. offsetScaledLogVariance	Standard PTP behaviour.
priority1	Default value 128.	0	255	128	Annex J.3.2
priority2	Default value 128.	0	255	128	Annex J.3.2
domainNumber	Default value 0.	0	127	0	Annex J.3.2
slaveOnly	Default value FALSE (if configurable).	FALSE	TRUE	FALSE	Annex J.3.2
Port data set
portIdentity.clockIdentity	Standard PTP behaviour.
portIdentity.portNumber	Standard PTP behaviour.
logMinDelayReqInterval	Not used (covered by unicast negotiation - see details below)
logAnnounceInterval	Not used (covered by unicast negotiation - see details below)
announceReceiptTimeout	Timeout period before declaring loss of announce service (in number of missing messages)	2	10	3	Annex J.3.2
logSyncInterval	Not used (covered by unicast negotiation - see details below)
delayMechanism	Default mechanism is E2E (0x01)			0x01	Annex J.3.3
logMinPdelayReqInterval	Not used in this profile.
versionNumber	Always set to 2			2
PTP common message header flags
alternateMasterFlag	Standard PTP behaviour.
twoStepFlag	Standard PTP behaviour.
unicastFlag	Standard PTP behaviour.
PTP profile Specific1	Standard PTP behaviour.
PTP profile Specific2	Standard PTP behaviour.
Reserved	Standard PTP behaviour.
leap61	Standard PTP behaviour.
leap59	Standard PTP behaviour.
currentUTCOffsetValid	Standard PTP behaviour.
ptpTimescale	Standard PTP behaviour.
timeTraceable	Standard PTP behaviour.
frequencyTraceable	Standard PTP behaviour.
controlField	Standard PTP behaviour.
Multicast and Unicast Operation
Full multicast operation	Permitted, but must be inactive by default.				Annex A.9.1, A.9.4.2
Full unicast operation	All messages are sent in unicast.
Hybrid unicast/multicast	Not required by this profile.
Unicast negotiation process	Both masters and slaves should support unicast negotiation (IEEE1588-2008 Clause 16.1).				Annex A.9.3, A.9.4.2
duration field	Duration of unicast service lease	10	1000	300	Annex A.9.4.2
logInterMessagePeriod	Suggested ranges:				Annex A.9.4.2
		-7	1	-4
		-7	6	-4
		-3	3	1
R (Renewal Invited)	Standard PTP behaviour.	FALSE	TRUE	FALSE	16.1.4.2.6
Master Selection Process
BMCA type:	Default BMCA				9.3.2
State decision algorithm	Default state decision algorithm				9.3.3
Data set comparison algorithm (master selection process)	Default data set comparison algorithm				9.3.4

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IEEE "Telecom Profile 2008"

Profile Identification

PTP Options

Message Rates

PTP Configurable Attribute Values

Default data set

Port data set

PTP common message header flags

Multicast and Unicast Operation

Master Selection Process

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