Spectracom SecureSync User Reference Manual page 412

5.5 Network Interface Option Cards
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, Section
7.6.2.4, Table 5).
PTP Arbitrary
Time
Scale
6 13
7 14
52 58
187 193
255 255
248 248
Table 5-22:
Ethernet Status
Current IP Address : The IP address currently being used by the PTP interface.
396
Time
Scale
Time and 1pps references are synchronized with the host references and PTP
clock shall not be a slave to another clock in the domain.
Time and 1pps references are in holdover state, within specifications and PTP
clock shall not be a slave to another clock in the domain.
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.
Time and 1pps references are in holdover state, not within specifications, and PTP
clock may be a slave to another clock in the domain.
Class assigned to "Slave-Only" clocks.
"Unknown" class.
Clock class definitions
NOTE – If the PTP Module is set up for DHCP but fails to obtain an IP address, it will
use the Static IP instead. To reacquire a DHCP address, reset the module via the
Main tab in the PTP settings window.
Clock Class Definition
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5 SecureSync User Reference Guide Rev. 18