Setting the Maximum Power Level for a PoE Power-Consuming Device

When PoE is enabled on a port to which a power-consuming device (PD) is attached, by default, a RUCKUS PoE device supplies 15.4 watts of power at the RJ-45 jack, minus any power loss through the cables. A PoE+ device supplies either 15.4 or 30 watts of power (depending on the type of PD connected to the port), minus any power loss through the cables. A PoH device supplies 15.4, 30, or 95 watts of power (depending on the type of PD connected to the port), minus any power loss through the cables.

As an example, a PoE port with a default maximum power level of 15.4 watts receives a maximum of 12.95 watts of power after 2.45 watts of power loss through the cables. This is compliant with the IEEE 802.3af, 802.3at, and 802.3bt specifications for delivering inline power. Devices that are configured to receive less PoE power (for example, 4 watts of power), experience a lower rate of power loss through the cables.

If desired, you can manually configure the maximum amount of power that the RUCKUS PoE device supplies at the RJ-45 jack.