Grandstream Networks, Inc. GXW410x User Manual Page 14 of 35
Firmware Version 1.3.4.13 Last Updated: 3/2012
Daylight Savings Time This parameter controls whether the displayed time will be daylight savings time or not. If
set to “Yes” and the Optional Rule is empty, then the displayed time will be 1 hour ahead of
normal time. The “Automatic Daylight Saving Time Rule” shall have the following syntax:
start-time;end-time;saving
Both start-time and end-time have the same syntax:
Month ,day ,weekday ,hour ,minute
month: 1,2,3,..,12 (for Jan, Feb, .., Dec)
day: [+|-]1,2,3,..,31
weekday: 1, 2, 3, .., 7 (for Mon, Tue, .., Sun), or 0 which means the daylight saving rule is
not based on week days but based on the day of the month.
hour: hour (0-23),
minute: minute (0-59)
If “weekday” is 0, it means the date to start or end daylight saving is at exactly the given
date. In that case, the “day” value must not be negative.
If “weekday” is not zero and “day” is positive, then the daylight saving starts on the first
“day”th iteration of the weekday (1st Sunday, 3rd Tuesday etc). If “weekday” us not zero
and “day” is negative, then the daylight saving starts on the last “day”th iteration of the
weekday (last Sunday, 3rd last Tuesday etc). The saving is in the unit of minutes. The
saving time may also be preceded by a negative (-) sign if subtraction is desired instead of
addition. The default value for “Automatic Daylight Saving Time Rule” shall be set to
“03,11,0,02,00;11,04,0,02,00;60” which is the rule for US.
Examples:
US where daylight saving time is applicable: 03,11,0,02,00;11,4,0,02,00;60
This means the daylight saving time starts from 11th March at 2AM and ends November 4th
at 2AM. The saving is 60 minutes (1hour).
You may also access the Device Status page which provides details of the GXW product. The Device
Status page terms are defined in Table 6: Status Page Definitions.