ViewSonic Moderro NMP012, Руководство пользователя

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3.7 Manage Network and Time
Since the device doesn’t have a real-time clock that keeps track of the current time, it
needs to get current time from an external source.
The Network Time Protocol (NTP) is used to synchronize the time of a device to NTP
server time.
The Precision Time Protocol (PTP) is a protocol used to synchronize slave clocks
to a master clock to ensure that event timestamps in all devices use the same time
base.
We recommend users setup devices as follows.
- Set NTP Enable on one device and set it as a PTP master.
- Set all other devices in the same network as PTP slave and disable NTP.
Note : If NTP is enabled in the device, but the NTP server is not reachable, the time
will failover to Jan 01, 2000 (UTC).
Note : If the device could not get time during boot up, the device sets the time to Jan
01, 1970 (UTC).
By synchronizing the time accurately between devices, we can synchronize the
video playback.