2N Helios IP Configuration Manual v2.8.1 - Manual (Page 98)

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2N TELEKOMUNIKACE a.s., www.2n.cz
®
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 Helios IP
®
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
button. Synchronise
Synchronise the intercom internal time with any available SNTP server if your intercom
is not equipped with a real-time clock.
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.
List of Parameters
Note
The intercom does not need the basic current date and time values for its
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.). 2N Helios IP
®