https://www.fanvil.com/Support/download/cid/14.html
9.21 Intercom Setting >> Time/Date
Users can configure the device's time Settings on this page.
Picture 33 - Time/Date
Table 21- Time/Date
Network Time Server Settings
Time Synchronized via SNTP
Enable time-sync through SNTP protocol
Time Synchronized via DHCP
Enable time-sync through DHCP protocol
Set primary time server address
Set secondary time server address, when primary server is not
reachable, the device will try to connect to secondary time server to
get time synchronization.
Time of re-synchronization with time server
Daylight Saving Time Settings
Select the user's time zone specific area
Select automatic DST according to the preset rules of DST, or the
manually input rules