One cable, two jobs
Power over Ethernet, or PoE, carries both data and power over one network cable. Devices like access points and cameras need only that one cable.
Why installers love it
There is no need for an outlet at every device, so mounting on ceilings and outdoor walls is easier and cleaner.
The PoE switch
A PoE switch supplies the power. Each switch has a power budget, so the number and type of devices matter.
Sizing tips
Add up the devices, allow headroom and choose a switch with enough ports and power. Our PoE calculator does the math.
Backup power
A battery backup on the switch keeps cameras and Wi-Fi running during short outages.
PoE standards
PoE comes in power levels. Standard PoE powers most cameras and phones; PoE+ handles most Wi-Fi access points and PTZ cameras; higher-power PoE++ runs larger devices like some displays and heaters in outdoor cameras. The switch and device must support the same level.
Planning a PoE switch
Add up the power of every device, then choose a switch with a comfortable margin. Put the switch on battery backup so cameras and Wi-Fi stay up during short outages.
Distance limits
Network cable runs are limited to about 100 meters (328 feet). Longer runs to outbuildings or gates need a switch partway, fiber or a wireless bridge.
Common questions
Do PoE cameras need outlets?
No. The network cable powers them.
Can any network cable carry PoE?
Use good-quality Cat6 with proper terminations for reliable power and data.
Do you install PoE networks?
Yes. See network racks.