COP-USA CD28IR-IP - Manual (Page 15)

Obtain the time from a PC or from the server to get the time, if there is no access to
the Internet only get from the PC.
click
“Submit” Save the settings，click “Get” The new setting is displayed.
5.3 Network
Set the subnet mask, gateway, and DNS server; following figure check DHCP, the
device can automatically obtain an IP address.