PTP Software Technology

The Precise Time Protocol is specified by the IEEE. The organization has rather strict rules on interpreting the Standards. No individual or organization can issue official interpretations or provide definitive answers to questions of interpretation. This must be done by an IEEE authorized committee. Even this committee cannot extend, correct, or change the standard-this must be done by ballot.

Conformance with IEEE 1588 - 2008 Specification

Protocol Implementation Conformance

The Qulsar PTP software from the beginning based on the ZHAW’s portable PTPv2 Protocol Software. This software has been further developed and the following constitutes the Implementation (at date specified):

Implementation according to the IEEE 1588 - 2008

Status: 2011-05-12

x = implemented
1 = in development, to be released
0 = no current plan to implement

Clock mode	x/1/0
One-step	x
Two-step	x
Network transport protocol
UDP/IPv4	x
IEEE 802.3	x
Variance algorithm	0
Computation of offsetScaledLogVariance	0
State machine
full	x
slave-only	x
best master clock algorithm (BMC)	x
Delay mechanism
E2E	x
P2P	x
Management
NULL_MANAGEMENT	x
CLOCK_DESCRIPTION	x
USER_DESCRIPTION	x
SAVE_IN_NON_VOLATILE_STORAGE	x
RESET_NON_VOLATILE_STORAGE	x
INITIALIZE	x
FAULT_LOG	0
FAULT_LOG_RESET	0
DEFAULT_DATA_SET	x
CURRENT_DATA_SET	x
PARENT_DATA_SET	x
TIME_PROPERTIES_DATA_SET	x
PORT_DATA_SET	x
PRIORITY1	x
PRIORITY2	x
DOMAIN	x
SLAVE_ONLY	x
LOG_MEAN_ANNOUNCE_INTERVAL	x
ANNOUNCE_RECEIPT_TIMEOUT	x
LOG_MEAN_SYNC_INTERVAL	x
VERSION_NUMBER	x
ENABLE_PORT	x
DISABLE_PORT	x
TIME	x
CLOCK_ACCURACY	x
UTC_PROPERTIES	x
TRACEABILITY_PROPERTIES	x
TIMESCALE_PROPERTIES	x
UNICAST_NEGOTIATION_ENABLE	1
PATH_TRACE_LIST	0
PATH_TRACE_ENABLE	0
MASTER_CLUSTER_TABLE	0
UNICAST_MASTER_TABLE	1
UNICAST_MASTER_MAX_TABLE_SIZE	1
ACCEPTABLE_MASTER_TABLE	1
ACCEPTABLE_MASTER_TABLE_ENABLED	1
ACCEPTABLE_MASTER_MAX_TABLE_SIZE	1
ALTERNATE_MASTERalternateMaster	0
ALTERNATE_TIME_OFFSET_ENABLE	1
ALTERNATE_TIME_OFFSET_NAME	1
ALTERNATE_TIME_OFFSET_MAX_KEY	1
ALTERNATE_TIME_OFFSET_PROPERTIES	1
TRANSPARENT_CLOCK_DEFAULT_DATA_SET	0
TRANSPARENT_CLOCK_CURRENT_DATA_SET	0
TRANSPARENT_CLOCK_PORT_DATA_SET	0
PRIMARY_DOMAIN	x
DELAY_MECHANISM	x
LOG_MIN_MEAN_PDELAY_REQ_INTERVAL	x

 

Optional features	x/1/0
Unicast message negotiation (optional)	1
Path Trace	0
Alternate timescales	1
Master cluster	0
Alternate master	0
Unicast discovery	1
Acceptable master table	1

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