Black Box 12-Port 1000BASE-TX L2 Managed PoE Switch User Manual page 39

12-Port 1000BASE-TX L2 Managed PoE Switch with 2 SFP Dual Media Ports
Parameter
Time
Current Time
Manual
NTP
Daylight Saving
36
Table 4-5. Time Configuration screen options.
Description
Type in the system time or set it by syncing from Time servers. The
function also supports daylight savings time for different areas' time
adjustment.
Shows the current system time.
Adjust the time manually. Type in the valid figures in the Year, Month,
Day, Hour, Minute, and Second fields respectively, then click on the
Apply button to adjust the time. The valid figures for the parameter
Year, Month, Day, Hour, Minute, and Second are >=2000, 1–12,
1–31, 0–23, 0–59, and 0–59 respectively. If you type in an invalid
figure and press the Apply button, the device will reject the time
adjustment request. There is no time zone setting in Manual mode.
Default: Year = 2000, Month = 1, Day = 1,
Hour = 0, Minute = 0, Second = 0
NTP is Network Time Protocol and is used to sync the
network-time-based Greenwich Mean Time (GMT). If you use the
NTP mode and select a built-in NTP time server or manually specify
a user-defined NTP server as well as Time Zone, the switch will sync
the time after you press the Apply button. Though it synchronizes
the time automatically, NTP does not update the time periodically
without user processing.
Time Zone is an offset time of GMT. From the drop-down menu,
select the time zone first and then perform time sync via NTP. The
switch will combine this time zone offset and update NTP time to the
local time; otherwise, you will not be able to get the correct time. The
switch supports a configurable time zone from -12 to +13 in 1-hour
steps.
Default time zone: +8 Hrs.
If set for daylight savings time, the switch will adjust the time lag or
advance in units of hours, according to the starting date and the
ending date. From the drop-down menu, set the daylight savings
time to 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.