Frequency Traceable: Indicates whether the Master’s Frequency is traceable (Enabled) to
a primary reference or not (Disabled).
PTP Time Scale: Indicates the timescale that the Master is using to broadcast its time. TAI is
the default PTP timescale.
Time source: The Time Source that the Master is using. Refer to IEEE Standard 1588-
2008, Section 7.6.2.6.
Clock Quality:
Clock Accuracy: A number describing the accuracy of the oscillator in the Master relative
to its UTC reference (see IEEE Standard 1588-2008, Section 7.6.2.5).
Offset Scaled Variance: A constant value based on the variance of the oscillator installed
in the SecureSync unit.
Clock Class: A number describing the state of the time and 1pps references of the PTP
Clock.
See table below for Clock Class definitions (see also: IEEE Standard 1588-2008, Sec-
tion 7.6.2.4, Table 5).
Table 5-24:
Clock class definitions
PTP
Time
Scale
Arbitrary
Time
Scale
Clock Class Definition
6 13 Time and 1pps references are synchronized with the host references and PTP clock shall
not be a slave to another clock in the domain.
7 14 Time and 1pps references are in holdover state, within specifications and PTP clock shall
not be a slave to another clock in the domain.
52 58 Time and 1pps references are in holdover state, not within specifications, and PTP clock
shall not be a slave to another clock in the domain. Then, applied to Master Clocks who
have just powered on and have not yet achieved a suitable TFOM value.
187 193 Time and 1pps references are in holdover state, not within specifications, and PTP clock
may be a slave to another clock in the domain.
255 255 Class assigned to “Slave-Only” clocks.
248 248 “Unknown” class.
Ethernet Status
Current IP Address: The IP address currently being used by the PTP interface.
478 SecureSync User Reference Guide
APPENDIX
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