Для того, щоб ІР телефон Grandstream коректно показував час потрібно вказати Часовий пояс.
Для цього потрібно у файлі конфігурації cfgxxxxxxxxxxxxx.xml вказати
адресу NTP сервера
<P30>xxx.xxx.xxx.xxx</p30>
TimeZone для України
<P64>EET-2EEST,M3.5.0/3,M10.5.0/4</P64>
Формат дати звиклий (dd-mm-yyyy)
<P102>2</P102>
Опис параметру "Time Zone"
The syntax is:
std offset dst [offset], start [/time], end [/time]
Default is set to: MTZ+6MDT+5,M4.1.0,M11.1.0
MTZ+6MDT+5
This indicates a time zone with 6 hours offset with 1 hour ahead which is U.S central time. If it is positive (+) if the local time zone is west of the
Prime Meridian (A.K.A: International or Greenwich Meridian) and negative (-) if it is east.
M4.1.0,M11.1.0
The 1st number indicates Month: 1,2,3.., 12 (for Jan, Feb, .., Dec)
The 2nd number indicates the nth iteration of the weekday: (1st Sunday, 3rd Tuesday...)
The 3rd number indicates weekday: 0,1,2,..,6( for Sun, Mon, Tues,... ,Sat)
Therefore, this example is the DST which starts from the First Sunday of April to the 1st Sunday of November.
Поради знайшов у
http://www.grandstream.com/sites/default/files/Resources/gxp21xx_14xx_usermanual_english.pdf
http://www.goldfish.ie/91873/all/1/Wrong-Time-On-Phone.aspx
Таблиця часових зон тут
https://sites.google.com/a/usapiens.com/opnode/time-zones
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