SR and SC Series NTP Servers Help and Support: Local Time Is Not Displayed
Models that this article applies to:
SR Series: SR7110, SR9210, SR9750, SR9850, SR9860D
SC Series: SC7105, SC9205, SC9705
The SR and SC series NTP servers operate using UTC time rather than local time – here’s why.
NTP always operates using UTC time rather than local time. It knows nothing of time zones and daylight saving. UTC time is pretty much the same as GMT time. It is the same all around the world and is unaffected by time zones or daylight saving time.
NTP synchronizes to UTC time from GPS or LF radio time references or from other NTP servers. It also provides UTC time to any network time clients that use it for synchronization purposes.
The adjustment to local time is a function of the client machine. For instance in Windows, the ‘Date and Time Properties’ applet tells Windows what offset should be applied to UTC time in order to provide local time. It adjusts its underlying UTC clock according to the time zone and daylight saving properties selected in order to provide local time. Linux and most other operating systems work in an identical manner.
This means that any client anywhere in the world can synchronize to a NTP server anywhere else in the world without worrying about time zone and daylight saving offsets. Therefore, the SR and SC series NTP servers always display UTC time – with no offset or adjustment for time zone and daylight saving.