Time Configuration - Waters Network Systems GSM2108 Operating Manual

5.4

Time Configuration

The switch provides a manual and automatic method to set the system time via NTP. Manual setting is
simple. Input "Year", "Month", "Day", "Hour", "Minute" and "Second" within the valid value range indicated
in each item. If you input an invalid value, for example, 61 in minute, the switch will clamp the figure to 59.
NTP is a well-known protocol used to synchronize the system time of the switch system time over a
network. NTP, an internet draft standard formalized in RFC 1305, has been adopted on the system is
version 3 protocol. The switch provides four built-in NTP server IP addresses residing in the Internet and
an user-defined NTP server IP address. The time zone is Greenwich-centered which uses the expression
form of GMT+/- xx hours.
Function name:
Time
Function description:
Set the system time by manual input or by synchronizing from Time servers. The function also
supports daylight savings.
Parameter description:
Current Time:
Show the current time of the system.
Manual:
Use this function to adjust the time manually. Enter the valid figures in the fields of Year, Month,
Day, Hour, Minute and Second respectively and press the Apply button. The time is adjusted.
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. Input the wrong 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,
Hour = 0,
NTP:
NTP is Network Time Protocol and is used to synchronize the network time based Greenwich
Mean Time (GMT). If used in the NTP mode and have selected a built-in NTP time server or
manually specify an user-defined NTP server as well as Time Zone, the switch will synchronize
the time shortly after pressing the 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. To set, select the time zone first and then perform time
synchronization via NTP. The switch will combine this time zone and updated NTP time to
arrive at the local 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 advance in unit
of hours, according to the starting date and the ending date. For example, if you set the daylight
saving to be one 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
Waters Network Systems
Month = 1, Day = 1
Minute = 0, Second = 0
User's Manual
GSM-2108/GSM-1008SFP
Page 28