Rugged Cams Workhorse DVR 4 Channel - Manual (Page 139)

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(5) ADSL
Used only in the user authentication-type ADSL environment
On the {Network Setup} menu, go to {ADSL} using the arrow (W X) buttons and press the
[Select] button.
To select 1, 2, or 3, use the [Tab]
button. For others, use the arrow (W X) buttons. Enter
the user ID and password and save them.