Rugged Cams Premier DVR - Manual (Page 147)

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(4) Cable
Set it when you use the automatic connection ADSL or dynamic IP.
Move the focus to the {Cable} using the direction (W X) buttons in the {Network} setup menu, and
press the [SELECT] button.
Use the [TAB] button for movement in items and , and direction buttons in others to
specify/save the settings on the Cable Modem DHCP.