Spectracom SecureSync User Reference Manual page 410

5.5 Network Interface Option Cards
5.5.2.3 PTP Grandmaster [-32]: Status Window
To view the status of a PTP interface, go to its Status window. For instructions, see "Viewing the
Configuration of an Input or Output" on page 288.
The GB PTP Status window contains two tabs:
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the SSM Code dropdown or the QL_DNU code. The user may set one of the
following broadcasting options:
Output Always Enabled : Always broadcasts the selected SSM
code, even when SecureSync is not synchronized to its references.
Output Enabled in Holdover : The output uses the selected SSM
code unless SecureSync is not synchronized to its references (the out-
put is present while in the Holdover mode). While SecureSync is not
synchronized, QL-DNU SSM code will be broadcast.
Output Disabled in Holdover : The output uses the selected SSM
code unless the SecureSync references are considered not qualified
and invalid (the output is not present while in the Holdover mode).
While references are invalid, QL-DNU SSM code will be broadcast.
Output Always Disabled : The output is not present, even if any
SecureSync references are present and considered qualified. QL-
DNU SSM code is broadcast.
SSM Code : The Sync Status Messaging (SSM) code to be utilized. Choice
of code is made through the drop-down list.
NOTE –
throughput. They use the "log2 seconds", defined as fol-
lows.
Positive Value : n => 2n seconds between two successive PTP pack-
ets
Negative Value : -n => 2(-n) = (1/2n) => 2n PTP packets per second
Main
CHAPTER
Some parameters define a PTP packets
and Advanced .
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5 SecureSync User Reference Guide Rev. 18