Power over Ethernet
What is Power over Ethernet?
Power over Ethernet (PoE) is a way to power cameras with an Ethernet cord, which also gives the camera direct network access. Along with providing stable network connections, PoE also makes installation easier by only requiring one cable.
How Power over Ethernet Works
PoE works by using a single network cable (including Cat-5, Cat-5e, or Cat-6) for both power and network connections. IP cameras wired for PoE have a special power switch in them which can use the power sent over the Ethernet cord, while cameras without this switch will simply get the network connection and no power.
Network connectivity is important to surveillance systems if you’re saving video files on an NVR or using the newer cloud storage. Unlike wireless connections, PoE ensures your IP cameras are always connected. This means your camera will reliably be able to send video files to your NVR, and direct connections can be faster than wireless connections.
There are two types of PoE, standard PoE and PoE+. The standard type of PoE found on most IP cameras, IEEE 802.3af, can send up to 15 watts of electricity. This amount of power is not enough for PTZ cameras or cameras with fans and heaters for outdoor use, but is enough to power basic IP surveillance cameras. PoE+, IEEE 802.3at, provides double the amount of power at 30 watts for more powerful cameras, and requires a different kind of switch than standard PoE.
If you have older cameras you don’t want to replace but you do want the advantages of PoE, you can use a PoE Splitter to convert a camera’s power and data supply. Most routers have a small number of ports, so if you need to connect large numbers of cameras to your system, or connect other devices, you may need a PoE Switch. If you have a switch that cannot handle PoE, a PoE Midspan can inject power into the existing network cables.
If your cameras use PoE+, you will need special PoE+ Midspans or Switches to provide your camera with enough power.
How Power over Ethernet Can Help You
PoE cameras make the installation process easier by requiring only one cable. This gives you more flexibility in camera placement, and prevents expensive electrical work to move or install a power outlet near the camera.
PoE cameras are available in every camera type including dome, fixed, HD, and more. Use your PoE cameras to:
- Monitor industrial sites, including warehouses and construction sites
- Stay connected to your home, apartment complex, or rental house
- Observe shopping habits, manage wait times, and prevent theft in retail stores
- Keep an eye on your business or office