LevelOne ProCon GSW-2496 - Manual (Page 44)

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NTP:
NTP is Network Time Protocol and is used to sync the network time based
Greenwich Mean Time (GMT). If use the NTP mode and select a built-in
NTP time server or manually specify an user-defined NTP server as well
as Time Zone, the switch will sync the time in a short after pressing
<Apply> button. Though it synchronizes the time automatically, NTP does
not update the time periodically without user’s processing.
Time Zone is an offset time off GMT. You have to select the time zone first
and then perform time sync via NTP because the switch will combine this
time zone offset and updated NTP time to come out the local time,
otherwise, you will not able to get the correct time. The switch supports
configurable time zone from –12 to +13 step 1 hour.
Default Time zone: +8 Hrs.
Daylight Saving:
Daylight saving is adopted in some countries. If set, it will adjust the time
lag or in advance in unit of hours, according to the starting date and the
ending date. For example, if you set the day light saving to be 1 hour.
When the time passes over the starting time, the system time will be
increased one hour after one minute at the time since it passed over. And
when the time passes over the ending time, the system time will be
decreased one hour after one minute at the time since it passed over.
The switch supports valid configurable day light saving time is –5 ~ +5 step
one hour. The zero for this parameter means it need not have to adjust
current time, equivalent to in-act daylight saving. You don’t have to set the
starting/ending date as well. If you set daylight saving to be non-zero, you
have to set the starting/ending date as well; otherwise, the daylight saving
function will not be activated.
Default for Daylight Saving: 0.
The following parameters are configurable for the function Daylight Saving
and described in detail.
Day Light Saving Start :
This is used to set when to start performing the day light saving time.
Mth:
Range is 1 ~ 12.
Default: 1
Day:
Range is 1 ~ 31.
Default: 1
Hour:
Range is 0 ~ 23.
Default: 0