Power over Ethernet (PoE) pass through switches can operate as both a Powered Device (PD) and Power Sourcing Equipment (PSE). This means that the switch can be powered by PoE while simultaneously providing power by PoE to other devices such as IP phones or wireless access points. This provides great flexibility because it means that the switch can be deployed without the constraints of an AC power outlet.
In a PoE pass through switch, one or more ports will be designated as PD ports and one or more ports will be designated as PSE ports. The switch can be powered through PoE connections to the PD ports while devices attached to the switch can be powered by connecting them to the PSE ports.
The image below shows a GS516TP PoE pass through switch. On this switch, the PD ports are marked in red on the diagram while the PSE ports are marked in green. Note that this model of switch may also be powered through a main AC connection on the rear.
Note: Power budget calculations are very important when determining what can power and be powered by a PoE pass through switch. Please refer to the documentation for the individual switch model for further information.
For more information about PoE, see the NETGEAR Business PoE landing page.