This is the ADT Pulse 5-port Switch. This is needed if more than one analog camera is to be connected to the ADT Pulse iHub. It is made by Netgear. It can have 4 of the encoders hooked up to it.  Then you can hook it into the devices port on the iHub. You may need up to three of these depending on how many ADT Pulse Analog Cameras you have. As shown below if you have more than 4 cameras you will need two of these. Furthermore, if you have more than 7 analog cameras you would need 3 of these.