Black Box LEV2525A - Daylight Savings Time on LE2425 A and LEV2525 A Switches; List of Valid Country Codes to Set Daylight Settings; Appendix B; How to Upgrade

MNS-BB Software User Guide
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APPENDIX A
Daylight Savings Time on LE2425A and LEV2525A Switches
LE2425A and LEV2525A Switches provide a way to automatically adjust the system clock for
Daylight Savings Time (DST) changes. The user defines the month and date to begin and end the
change from standard time. In addition to the value "none" (no time changes), there are fifteen pre-
defined settings, a few examples are:
 Alaska
 Canada and Continental US
 Middle Europe and Portugal
 Southern Hemisphere
 Western Europe
The pre-defined settings follow these rules:
Alaska:
• Begin DST at 2am the first Sunday on or after April 24th.
• End DST at 2am the first Sunday on or after October 25th.
Canada and Continental US:
• Begin DST at 2am the first Sunday on or after April 1st.
• End DST at 2am the first Sunday on or after October 25th.
Middle Europe and Portugal:
• Begin DST at 2am the first Sunday on or after March 25th.
• End DST at 2am the first Sunday on or after September 24th.
Southern Hemisphere:
• Begin DST at 2am the first Sunday on or after October 25th.
• End DST at 2am the first Sunday on or after March 1st.
Western Europe:
• Begin DST at 2am the first Sunday on or after March 23rd.
• End DST at 2am the first Sunday on or after October 23rd.
A sixth option named "User defined" allows the user to customize the DST configuration by entering
the beginning month and date plus the ending month and date for the time change.
Before configuring a "User defined" Daylight Time Rule, it is important to understand how the
Switch treats the entries. The Switch knows which dates are Sundays, and uses an algorithm to
determine on which date to change the system clock, given the configured "Beginning day" and
"Ending day":
•
If the configured day is a Sunday, the time changes at 2am on that day.
•
If the configured day is not a Sunday, the time changes at 2am on the first Sunday
after the configured day.
This is true for both the "Beginning day" and the "Ending day".
List of valid country codes to set daylight settings
 Egypt
 Namibia
 USSR
 Iraq
 Lebanon
 Syria
 Australia
 London
 Belgium
 Italy
 Greece
 Cuba
 USA
 Falklands
 Chile
APPENDIX B
How to Upgrade
LE2425A / LEV2525A Managed Network Software (MNS-BB) can be obtained from Blackbox FTP