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The Flex Remote Site Monitor has NTP

The Flex synchronizes its internal clock to Network Time Protocol servers for accurate time-keeping.

The Network Time Protocol (NTP) uses Internet time servers, which are computers that access atomic clocks such as those operated by the U.S. government to acquire precise time, and to distribute this accurate time reference to Internet users.   NTP servers provide the atomic clock’s time of day information to client computers over UDP port 123, accurately adjusting the time reference to compensate for network transmission delays. Such accurate timekeeping will ensure that the Flex history logs and schedules are synchronized with other systems and equipment.