67
9. ANNEXES
9.1Annex1:synchronisation
9.1.1. Primary source / secondary source
Scenario1:lossofsynchronisationfromtheprimarythensecondarysources
> Freerun
1
on product start-up
> Synchronisation with the primary source (e.g. GPS)
> Loss of synchronisation from the primary source
> Holdover
2
> Synchronisation with the secondary source (e.g. NTP)
> Loss of synchronisation from the secondary source
> Holdover
> No synchronisation detected
> Freerun
Scenario2:synchronisationwiththesecondarysourceafterlossoftheprimarysource
> Freerun on product start-up
> Synchronisation with the primary source (e.g. GPS)
> Loss of synchronisation from the primary source
> Holdover
> Re-synchronisation with the primary source
1
thisisastatusinwhichNetsiloncantransmitatimesignalwithoutanyguaranteeofitsprecision.Theprecisionofthe
time zone is no longer guaranteed.
2
reminder:holdovermodedurationcanbesetviathewebserver.
3
thesestatusesareshownontheNetsilonLCDscreen.
Statuses
3
:
Notifications: Synchronised
Change
of source
Holdover Holdover
Loss of synchronisation
then switch to freerun
Freerun
Synchronised
(primary)
Synchronised
(secondary)
Holdover Holdover Freerun
Statuses:
Notifications: Synchronised
End of holdover / resumption of
synchronisation
Holdover
Freerun
Synchronised
(primary)
Synchronised
(primary)
Holdover