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4.5Choosing synchronisation sources
To choose the synchronisation source(s), follow these steps:
1) TIME menu > Synchronisation
4.5.1. Status of sources
An overview is provided. This area shows whether or not the available synchronisation sources have been activated.
4.5.2. Priority of sources
The priority of synchronisation sources can be used to define the priorities between each available source, in order
to enable Netsilon to transmit a continuous, precise time signal.
In order to establish a priority for the synchronisation sources and to configure the holdover: Click , and the
following window will appear:
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3 possible choices: AUTO
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- GPS1 - NTP:
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3 possible choices: None - GPS1 - NTP:
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Holdover is a status in which the time server continues to transmit a time signal without the presence of a
synchronisation source. By default, the holdover value is set at 300 minutes (5 hours). This depends on the
environment in which Netsilon is used and on user requirements in terms of time signal precision. This value is
sufficiently large to mask any mini-outages of the synchronisation source, but sufficiently low to ensure a high-
quality time signal.
See Chapter 8.1 Annex1:Synchronisation for an overview of the different synchronisation scenarios
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Inthismode,Netsilonautomaticallyselectsthemostreliablesource(withthehighestquality)andautomaticallyswitches
betweenthesources(ifasourceislost).
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