Hi Gabriel… yes it is very possible but depending on a few things 
 
	are the 3 cameras located in same area and the distance from cameras to recorder
 
	 
 
	but yes 3 cameras down one cat cable is done by running all 3 cameras to a 4way Poe switch 
 
	you then have the option to run one cat cable from switch to router or using tp-link Ethernet power adapters