Poe injector for network switch

This device used for powering yours IP cameras(12 v) over cat5 ethernet lan cable.It may used only for places where lan cable have maximum 20-30 meters long There are 4 - 5 cameras maximum for this device, but it can be upgrade for needed. For powering you must have power supply 12 volt 3-4 amp., 5 port 100mbit/Gbit switch, 12v to 9v(7v) step down module 1 amp. Gerber file, Fusion360, and step in attach. 12 volt from power supply attach to poe injector. From 1-4 connectors supply transfer to camera over two pairs from lan cable(Blue + and Brown -) other wires used for data transfer. From 5 connector 12 volt step downed(7-9 volts) to use for power network switch. If network switch powered from other power supply you can use 5 port for powering 5-th camera.