D-link Power over ethernet (DWL-P200) POE

The DWL-P200 Power Over Ethernet (PoE) adapter kit is designed to supply operational power to surveillance cameras and wireless LAN devices such as access points, bridges and routers. It enables power current to travel on the Ethernet network cable. The DWL-P200 supports both 5VDC and 12VDC power requirements. Power requirement can be selected through a DIP switch.
On a standard UTP Category 5 cable, only two pairs (pins 1, 2, 3 and 6) are used for Ethernet data transfer. Power Over Ethernet is designed to take advantage of the unused pins of the remaining pair of cable wires. Consequently, a single Category 5 cable will now carry both Ethernet data and DC power. The idea is to supply the remote end with power and the requirements of Ethernet connectivity via a single Cat 5 cable.
The DWL-P200 includes a base unit and a terminal unit. At one end, the base unit inserts DC voltage into the unused wires (pins 4, 5, 7 and 8) of the network cable. At the other end, the terminal unit splits the data and DC power apart. Data signals continue to travel on remaining network cables, while DC power is fed into the power adapter, which connects to an AC power outlet.