2N LTE Verso Configuration Manual page 194

5.5.2 Date and Time
If you control validity of phone numbers, lock activation codes and similar by time profiles,
make sure that the intercom internal date and time are set correctly.
Most 2N LTE intercom models are equipped with a back-up real-time clock to withstand up to
several days' long power outages. If not equipped with this function, the intercom loses the real
time data upon power outage (or restart). Therefore, if the intercom is powered up after a rather
long period of time (after new intercom installation, e.g.), time is set to the default value and has
to be reset. You can synchronise the intercom time with your PC anytime by pressing
the Synchronise button.
Synchronise the intercom internal time with any available SNTP server if your intercom is not
equipped with a real-time clock.
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Note
• The intercom does not need the current date and time values for its basic function.
However, be sure to set these values when you apply time profiles and display time of
listed events (Syslog, used cards, logs downloaded by HTTP API, etc.).
Practically, the intercom real-time circuit accuracy is approximately ±0,005 %, which may mean
a deviation of ±2 minutes per month. Therefore, we recommend you to synchronise time with
the NTP server to achieve the highest accuracy and reliability. The intercom sends a query to the
NTP server periodically to update its time value.
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