В меню DCS-2121 "Setup -> Time and Date" отметил "Synchronize with NTP Server" и выбрал сервер ntp.dlink.com.tw, ntp1.dlink.com (61.67.210.241). Синхронизация времени выполняется каждые 5 мин! Если задать вручную другой сервер, например, ntp.time.in.ua (62.149.0.30), то интревал синхронизации остается таким же (5 мин).
Firmware Version 1.05, 4630 (последняя версия), настройки по умолчанию сбрасывал. И в предыдущих прошивках наблюдал такой баг - ежеминутная синхронизация времени.
Без синхронизации погрешность хода часов камеры составляет не более 1 секунды в сутки.
Привожу лог синхронизации часов камеры, зафиксированный с помощью маршрутизатора D-Link DFL-210:
Код:
[2011-07-07 11:00:41] event=conn_open_natsat rule=allow_standard conn=open connipproto=UDP conndestip=61.67.210.241 conndestport=123
[2011-07-07 11:06:00] event=conn_open_natsat rule=allow_standard conn=open connipproto=UDP conndestip=61.67.210.241 conndestport=123
[2011-07-07 11:11:01] event=conn_open_natsat rule=allow_standard conn=open connipproto=UDP conndestip=61.67.210.241 conndestport=123
[2011-07-07 11:16:17] event=conn_open_natsat rule=allow_standard conn=open connipproto=UDP conndestip=61.67.210.241 conndestport=123
[2011-07-07 11:21:23] event=conn_open_natsat rule=allow_standard conn=open connipproto=UDP conndestip=61.67.210.241 conndestport=123
[2011-07-07 11:26:33] event=conn_open_natsat rule=allow_standard conn=open connipproto=UDP conndestip=61.67.210.241 conndestport=123
[2011-07-07 11:31:42] event=conn_open_natsat rule=allow_standard conn=open connipproto=UDP conndestip=61.67.210.241 conndestport=123
[2011-07-07 11:37:01] event=conn_open_natsat rule=allow_standard conn=open connipproto=UDP conndestip=61.67.210.241 conndestport=123
[2011-07-07 11:42:04] event=conn_open_natsat rule=allow_standard conn=open connipproto=UDP conndestip=61.67.210.241 conndestport=123
[2011-07-07 11:47:15] event=conn_open_natsat rule=allow_standard conn=open connipproto=UDP conndestip=61.67.210.241 conndestport=123
[2011-07-07 11:52:38] event=conn_open_natsat rule=allow_standard conn=open connipproto=UDP conndestip=61.67.210.241 conndestport=123
[2011-07-07 11:57:59] event=conn_open_natsat rule=allow_standard conn=open connipproto=UDP conndestip=61.67.210.241 conndestport=123
[2011-07-07 13:35:35] event=conn_open_natsat rule=allow_standard conn=open connipproto=UDP conndestip=62.149.0.30 conndestport=123
[2011-07-07 13:42:40] event=conn_open_natsat rule=allow_standard conn=open connipproto=UDP conndestip=62.149.0.30 conndestport=123
[2011-07-07 13:48:02] event=conn_open_natsat rule=allow_standard conn=open connipproto=UDP conndestip=62.149.0.30 conndestport=123
[2011-07-07 13:53:06] event=conn_open_natsat rule=allow_standard conn=open connipproto=UDP conndestip=62.149.0.30 conndestport=123
[2011-07-07 13:58:13] event=conn_open_natsat rule=allow_standard conn=open connipproto=UDP conndestip=62.149.0.30 conndestport=123
[2011-07-07 14:03:29] event=conn_open_natsat rule=allow_standard conn=open connipproto=UDP conndestip=62.149.0.30 conndestport=123
[2011-07-07 14:08:52] event=conn_open_natsat rule=allow_standard conn=open connipproto=UDP conndestip=62.149.0.30 conndestport=123
[2011-07-07 14:13:55] event=conn_open_natsat rule=allow_standard conn=open connipproto=UDP conndestip=62.149.0.30 conndestport=123
[2011-07-07 14:19:11] event=conn_open_natsat rule=allow_standard conn=open connipproto=UDP conndestip=62.149.0.30 conndestport=123
[2011-07-07 14:24:28] event=conn_open_natsat rule=allow_standard conn=open connipproto=UDP conndestip=62.149.0.30 conndestport=123
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