Speco DVR-4TL/160 User Manual page 11

Power Jack
The DVR-4TL series has a free voltage DC power connection jack. Please
connect the power adapter that ships with the unit.
NOTE: Use of other power adapter may cause overloading.
UTP Input
Short for Unshielded Twisted Pair, which is a popular type of cable. Due to its
low cost, UTP cabling here is used for replacing BNC cabling.
There are plenty of UTP connectors positioned on the rear panel of each unit.
Next to these connectors places a switch used to enable or disable this
function. The switch has four DIP switches on it. These DIP switches are
named by numbers; and each number corresponds to a camera. Note that
BNC are alternative methods of access for video input cabling, which means
if you chose BNC for Camera 1, than you have to disable its UTP function.
NOTE: UTP cable transfers not only Video Signal but also power for
cameras.
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User's Manual