PoE (Power over Ethernet) has a power range from 15.4 watts to 100 watts, depending on the IEEE standard used.
IEEE 802.3af (Standard PoE): This is the earliest PoE standard, released in 2003. The voltage range is 44-57V.
The maximum current is 350mA, with a peak of 400mA. The maximum output power is 15.4 watts. The actual power available to the device is 12.95 watts.
IEEE 802.3at (PoE+): Released in 2009, this standard has a voltage range of 50-57V. The maximum current is 600mA, with a peak of 686mA. The maximum output power is 30 watts. The actual power available to the device is 25.5 watts.
IEEE 802.3bt (POE++ or High Power POE) is the newest standard. It has two types: Type 3 and Type 4. Type 3 can provide a maximum of 60 watts.
The actual power available for devices is 51 watts. Type 4 can provide a maximum of 100 watts. The actual power available for devices is 71 watts.
Uses of PoE technology: PoE is employed in numerous devices requiring network-supplied power. This includes IP phones, wireless access points, network cameras, and video conferencing systems. Using power over Ethernet means there is no need for extra power wiring. This makes installation easier and cuts down on costs.
