In case it hasn't been posted before, here's instructions to get the
correct time to show up on your Grandstream GXP-2000's:
1. Login to phone
2. Go to Basic Settings tab
3. Change Daylight Savings Time to yes
4. Change Optional Rule to 3,2,7,2,0;11,1,7,2,0;60 (this means change
clocks the second sunday of March and back again the first sunday of
November - i.e., the new savings times).
For additional reference, here's how to configure the 'optional
rule'
field from the manual at
http://support.vocalocity.com/grandstream_guide.pdf:
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 thefollowing
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" is 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 "04,01,7,02,00;10,-1,7,02,00;60" which is the rule for US.
Examples
US/Canada where daylight saving time is applicable:
04,01,7,02,00;10,-1,7,02,00;60
This means the daylight saving time starts from the first Sunday of
April at 2AM and ends the last Sunday of October at 2AM. The saving is
60 minutes (1hour).
Hope this saves someone a bit of time,
Ken
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