Power over Ethernet. See the discussion of PoE on the FAQ page. Power over Ethernet uses the 4 spare wires in Cat5 cable to supply power to devices with Ethernet connectos, or to "splitters" or "injectors". Video surveliance equipment often yses PoE. Those enabled with pan-tilt control can get their power and control commands and send video, all over a single Cat5 Ethernet cable.
New Passive PoE 16 port injector 19" Rack Mount POEP16 $68.95
New Passive PoE 8 port injector with mounting holes. POEP8 $18.95
PoE 24Volt: 1250 mA power supply with power cord and dual RJ45 jacks. POE24P
PoE 24V outlet mount: 24V wall mount/power socket mount type. POE24W
PoE 12V outlet mount: 12V 1000 mA wall mount/power socket mount type. POE12W
PoE Injector/Splitter Pair 5.5x2.5mm: A set of one inject and one splitter for adding PoE to any Cat5 cable. POEIS25
PoE Injector/Splitter Pair 5.5x2.1mm: A set of one inject and one splitter for adding PoE to any Cat5 cable. POEIS21
PoE Mounted Injector: A small plastic PoE injector with mounting ears. POEMI
