ZyXEL Communications NSA-2401 用户手册

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Chapter 5 System Setting Screen
NSA-2401 User’s Guide
122
5.1.1  Time Lag
Time lag occurs when the time on the NSA falls behind the time on the time server. This may 
happen if:
New Time (hh:mm:ss)
This field displays the last updated time from the time server or the last 
time configured manually.
When you set Date Time Setup to Manual, enter the new time in this field 
and then click Apply
Get from Time Server
Select this to have the NSA get the time and date from the time server you 
select in the Time Server Address field. 
Time Server Address
Select a time server from the drop-down list box. Check with your ISP/
network administrator if you are unsure of this information.
Synchronize Now
Click this button for the NSA to retrieve the correct time from the 
configured time server right away.
Time Zone
Choose the NSA’s time zone. 
Enable Daylight Saving 
Daylight saving is a period from late spring to early fall when many 
countries set their clocks ahead of normal local time by one hour to gain 
more daytime light in the evening.
Select this option if you use Daylight Saving Time.
Start Date
Configure the day and time when Daylight Saving Time starts if you 
selected Enable Daylight Saving. The hour field uses the 24 hour 
format. Here are a couple of examples:
Daylight Saving Time starts in most parts of the United States on the 
second Sunday of March. Each time zone in the United States starts 
using Daylight Saving Time at 2 A.M. local time. So in the United States 
you would use March, [Second Sunday], at 2:00.
Daylight Saving Time starts in the European Union on the last Sunday of 
March. All of the time zones in the European Union start using Daylight 
Saving Time at the same moment (1 A.M. GMT or UTC). So in the 
European Union you would select March, [Last Sunday]. The time you 
specify depends on your time zone. In Germany for instance, you would 
enter 2 AM because Germany's time zone is one hour ahead of GMT or 
UTC (GMT+1). 
End Date
Configure the day and time when Daylight Saving Time ends if you 
selected Enable Daylight Saving. The o'clock field uses the 24 hour 
format. Here are a couple of examples:
Daylight Saving Time ends in the United States on the first Sunday of 
November. Each time zone in the United States stops using Daylight 
Saving Time at 2 A.M. local time. So in the United States you would select 
NovemberFirstSunday, at 2:00.
Daylight Saving Time ends in the European Union on the last Sunday of 
October. All of the time zones in the European Union stop using Daylight 
Saving Time at the same moment (1 A.M. GMT or UTC). So in the 
European Union you would select OctoberLastSunday. The time you 
specify depends on your time zone. In Germany for instance, you would 
type 2 because Germany's time zone is one hour ahead of GMT or UTC 
(GMT+1). 
Offset
Specify by how many hours to change the time for Daylight Saving Time.
Apply
Click this to save your changes.
Cancel
Click this to discard changes.
Table 18   System Setting > Date/Time  (continued)
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