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ID #1048

How do I use a PoE midspan switch?

A Midspan provides power on the Ethernet cable. The maximum allowed continuous output power per cable in IEEE 802.3af is 15.4 W. The IEEE 802.3at offers 25.5 W. When the device is a switch, it's called an endspan. Otherwise, if it's an intermediary device between a non PoE capable switch and a PoE device, it's called a midspan. So, really, there is no such thing as a midspan switch.

A single port PoE injector also classifies as a midspan, in the sense that it is an intermediary device between a non-PoE switch and a PoE egde device, such as a PoE-enabled network camera.



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Tags: PoE, Power over Ethernet

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