Hello, I bought two 700n cameras online. But I don't have Logitech HomePlug. I don't have poe either, so I injected voltage into the power output for poe5 volts. It works. When I plug in the modem, the network light blinks. But when I scan the network, the camera doesn't appear. The camera can't get the ip address. Do you know how I can install this camera? Is HomePlug mandatory?