ZyXEL Communications Corporation PLA4231 Manuel D’Utilisation

Chapter 13 Maintenance

PLA4231 User’s Guide

Find firmware at 

www.zyxel.com

 in a file that (usually) uses the system model name with a “*.bin” 

extension, e.g., “PLA4231.bin”. The upload process uses HTTP (Hypertext Transfer Protocol) and 
may take up to two minutes. After a successful upload, the system will reboot.

Click Maintenance > Firmware Upgrade. Follow the instructions in this screen to upload 
firmware to your PLA4231. 

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). 

Daylight Savings

Daylight saving is a period from late spring to 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.

Start Date

Configure the day and time when Daylight Saving Time starts if you selected Daylight 
Savings. The o'clock 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 select Second, Sunday, March and type 
2 in the o'clock field.

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 Last, 
Sunday, March. The time you type in the o'clock field 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). 

End Date

Configure the day and time when Daylight Saving Time ends if you selected Daylight 
Savings. 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 First, Sunday, November and type 2 in the 
o'clock field.

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 Last, 
Sunday, October. The time you type in the o'clock field 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). 

Apply

Click Apply to save your changes back to the PLA4231.

Cancel

Click Cancel to reload the previous configuration for this screen.

Maintenance > Time