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What is POE ?


POE stands for Power Over Ethernet which is the ability to power devices over a network cable(Cat5/cat6).

There are a two Standards for POE devices 802.3af and 802.3at and there are also 5 Classes:
Class Power Watts Standards
0 48vdc 15.4 802.3af
1 48vdc up to 4 802.3af
2 48vdc up to 7 802.3af
3 48vdc up to 15.4 802.3af
4 56vdc up to 30-35 802.3at
 
The power is ran over 2 pairs of an ethernet cable and can power the device up to 100meters away from the POE source or even further using POE extenders/switches.

High POE which can provide up to 56vdc up to 35watts and provides POE over the 2 pairs of an ethernet cable, or 70 watts over 4 pairs.

In an office environment POE solutions can reduce the need for electricians when you want to move equipment around the office as well as only requiring one cable to power and transmit data from the device.

Using POE switches also gives you a central power location and using UPS (Uninterupable Power Supply) will keep your devices operating during a power outage.

There are a number of devices which can be operated via POE including:

· IP Cameras
· IP Telephones VOIP (voice over internet Protocol)
· Wireless Communications
· Powering devices requiring 12vdc up to 2 amp
· Powering devices requiring 5vdc upto 2.5 amp
· IP Relay Moduels (Web Relay's)
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