This type of product is not a hub or a switch, it takes two to make it work. It allows to pass two signals in a single cable, and for this it needs to be fed by two streams. The first Dexlan must be connected to two outputs on the switch / router that feeds your installation: 2 patch cables run of 2 outputs of the switch / router and plug into the 2 sockets. You plug the male connector on the cable supplying the RJ45 socket when it is desired to connect 2 devices (if necessary, install a socket on the same cable). It connects the second Dexlan to this jack and voila.
