Balums for surveillance cameras.
The baluns are a device that allows us to use network cable instead of coaxial cable to connect a video surveillance camera to the recorder. Baluns really is a simple adapter to use two twisted wires. Typically used UTP cable category 5 or category 6 as the remaining threads is also possible to bring the power of the camera.
Therefore thanks to the baluns, we can replace both the power cord and coaxial cable, carry the video signal and power over a single cable, which greatly facilitates installation.
Baluns allow transmitting the signal from the cameras over long distances with network cable, baluns usually possible to transmit up to 300 meters of cable. (Depends on the model and Balun UTP cable category used).