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 models are equipped with a back-up real-time clock to withstand 2N IP intercom
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.
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 , etc.).HTTP API
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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