What is the maximum power output of a Powered Device (PD) port?

The maximum power output of a Powered Device (PD) port, specifically in the context of Power over Ethernet (PoE), depends on the standards being referenced. In PoE, there are different standards that specify varying power outputs. The original standard, IEEE 802.3af, which is often what is being referred to when discussing a maximum of 15 watts, allows for up to 15.4 watts delivered to the powered device, but only 12.95 watts are available for the device because of losses in the cabling.

However, if we take into account the newer standards, such as IEEE 802.3at (PoE+), it supports a maximum output of 30 watts, and the latest, IEEE 802.3bt (PoE++), can deliver up to 60 watts or even 100 watts in some configurations.

Given the phrasing of the question implies a limitation aligned with older standards or a misunderstanding of available wattage capabilities, the choice of 7.5 watts does not align with any standard for PD ports.

The best understanding regarding powered device port capabilities revolves around recognizing that while 15 watts refers to the older standards, the real distinctions in power capacity lie in the developments and improvements of