ZyXEL Communications Corporation EMG2881-T20A Manuel D’Utilisation

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 Chapter 11 Maintenance
EMG2881-T20A User’s Guide
101
11.6  Firmware Upgrade Screen
Find firmware at 
www.zyxel.com
 in a file that (usually) uses the system model name with a “*.bin” 
extension, e.g., “EMG2881-T20A.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 
EMG2881-T20A. 
Figure 62   Maintenance > Firmware Upgrade 
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.
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 first Sunday of April. 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 FirstSundayApril 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 LastSundayMarch. 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 last Sunday of October. 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 Last, Sunday, October 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 EMG2881-T20A.
Cancel
Click Cancel to exit this screen without saving.
Table 44   Maintenance > Time (continued)
LABEL
DESCRIPTION