ZyXEL Communications HW-D Series ユーザーズマニュアル

P-662H/HW-D Series User’s Guide

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Chapter 23 System

The following table describes the fields in this screen. 

Table 135   System Time Setting

Current Time and 

Date

Current Time 

This field displays the time of your ZyXEL Device.
Each time you reload this page, the ZyXEL Device synchronizes the time with the 

time server.

Current Date 

This field displays the date of your ZyXEL Device. 
Each time you reload this page, the ZyXEL Device synchronizes the date with the 

time server.

Time and Date 

Setup

Manual

Select this radio button to enter the time and date manually. If you configure a new 

time and date, Time Zone and Daylight Saving at the same time, the new time and 

date you entered has priority and the Time Zone and Daylight Saving settings do 

not affect it.

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 Time and Date Setup to Manual, enter the new time in this field 

and then click Apply. 

New Date 
(yyyy/mm/dd)

This field displays the last updated date from the time server or the last date 

configured manually.
When you set Time and Date Setup to Manual, enter the new date in this field 

and then click Apply.

Get from Time 

Server

Select this radio button to have the ZyXEL Device get the time and date from the 

time server you specified below.

Time Protocol 

Select the time service protocol that your time server uses. Not all time servers 

support all protocols, so you may have to check with your ISP/network 

administrator or use trial and error to find a protocol that works.
The main difference between them is the format.
Daytime (RFC 867) format is day/month/year/time zone of the server. 
Time (RFC 868) format displays a 4-byte integer giving the total number of 

seconds since 1970/1/1 at 0:0:0. 
The default, NTP (RFC 1305), is similar to Time (RFC 868). 

Time Server 

Address

Enter the IP address or URL (up to 20 extended ASCII characters in length) of 

your time server. Check with your ISP/network administrator if you are unsure of 

this information.

Time Zone Setup

Time Zone

Choose the time zone of your location. This will set the time difference between 

your time zone and Greenwich Mean Time (GMT). 

Enable Daylight 

Savings 

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 give more daytime light in 

the evening.
Select this option if you use Daylight Saving Time.