The network time server acts as a stand-alone SNTP server.
All computers on its local network can synchronise its system time with the network at any time.
The time server itself is permanently synchronised via the long wave time signal sent by the DCF77 transmitter in Mainflingen, Germany. This signal is generated from one of the most precise atomic clocks in the world. It is controlled by the Physically-Technical Federal Institution in Brunswick, Germany and deviates by less than one second in 300,000 years. If the time signal reception is ever lost or in the event of a power cut, the time server will automatically take over the timing via an integrated battery-buffered Quartz clock, and automatically returns to DCF77 mode once the reception has been restored.
Your complete network will always have a highly accurate system time.