What is the maximum available watts per port using PoE based on IEEE 802.3bt (Type 4)?

The correct answer is based on the specifications outlined in the IEEE 802.3bt standard, which is also known as Power over Ethernet (PoE) Type 4. This standard provides a significant improvement in power delivery capabilities compared to its predecessors, allowing for higher power levels to be delivered through Ethernet cables to powered devices such as IP cameras, wireless access points, and other networked devices.

IEEE 802.3bt (Type 4) allows for a maximum power output of up to 90 watts per port at the powered device. This power capability is crucial for devices that require more energy, enabling more robust functionalities, including enhanced processing power, additional features, and compatibility with a wider range of devices that may have higher power demands.

Power levels for PoE standards include various classifications, where earlier standards like 802.3af (Type 1) and 802.3at (Type 2) delivered 15.4 watts and 30 watts, respectively. The introduction of 802.3bt not only increased power delivery per port but also widened the scope of devices that could reliably operate using a single Ethernet cable.

Therefore, understanding the wattage capabilities defined by each PoE standard is critical for network design and implementation,