PoE Midspan Method
The PoE Midspan method uses an intermediate device, usually another PD, to inject power into the network. The intermediate device is positioned between the switch and the PD and delivers power over the network using the spare pairs of wires (Alternative B). The intermediate device has multiple channels (typically 6 to 24), and each of the channels has data input and a data-plus-power RJ-45 output connector.
