Lantech 2204F Series, User Manual

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5.5 Time - SNTP
SNTP (Simple Network Time Protocol) is a simplified version of NTP which is an Internet
protocol used to synchronize the clocks of computers to some time reference. Because
time usually just advances, the time on different node stations will be different. With the
communicating programs running on those devices, it would cause time to jump forward
and back, a non-desirable effect. Therefore, the switch provides comprehensive
mechanisms to access national time and frequency dissemination services, organize the
time-synchronization subnet and the local clock in each participating subnet peer.
Daylight saving time (DST) is the convention of advancing clocks so that afternoons
have more daylight and mornings have less. Typically clocks are adjusted forward one
hour near the start of spring and are adjusted backward in autumn.

SNTP Client: Enable/disable SNTP function to get the time from the SNTP server.

UTC Timezone: Universal Time, Coordinated. Set the switch location time zone.
The following table lists the different location time zone for your reference.
Local Time Zone Conversion from UTC Time at 12:00 UTC
November Time Zone - 1 hour 11am
Oscar Time Zone -2 hours 10 am
ADT - Atlantic Daylight -3 hours 9 am
AST - Atlantic Standard
EDT - Eastern Daylight
-4 hours 8 am
EST - Eastern Standard
CDT - Central Daylight
-5 hours 7 am
CST - Central Standard
MDT - Mountain Daylight
-6 hours 6 am
MST - Mountain
Standard
-7 hours 5 am