• 24 10/100/1000 PoE ports • 4 GE (2 combo GE plus 2 1GE/5GE SFP)
Power Dedicated to PoE 180W Number of Ports That Support PoE 24 Cisco
500 Series switches support the Power over Ethernet Plus (PoE+) standard (IEEE
802.at) Cisco 500 Series switches are also fully backwards compatible with IEEE
802.11af PoE and previous generation Cisco legacy PoE protocols
The original IEEE 802.3af-2003 PoE standard provides up to 15.4 W of DC
power (minimum 44 V DC and 350 mA) to each device. Only 12.95 W is assured
to be available at the powered device as some power is dissipated in the cable.
The updated IEEE 802.3at-2009 PoE standard also known as PoE+ or PoE plus,
provides up to 25.5 W of power.The 2009 standard prohibits a powered device
from using all four pairs for power.