PoE on the Switch

A PoE switch is PSE (Power Sourcing Equipment) that delivers electrical power to connected PD (Powered Devices) over existing copper cables without interfering with the network traffic, updating the physical network or modifying the network infrastructure.

PoE Features

PoE provides the following features:

Power over Ethernet can be used in any enterprise network that deploys relatively low-powered devices connected to the Ethernet LAN, such as:

PoE Operation

PoE implements in the following stages:

PoE supports two modes:

PoE Configuration Considerations

There are two factors to consider in the PoE feature:

You can decide the following:

The PoE-specific hardware automatically detects the PD class and its power limit according to the class of the device connected to each specific port (Class Limit mode).

If at any time during the connectivity an attached PD requires more power from the switch than the configured allocation allows (no matter if the switch is in Class Limit or Port Limit mode), the switch does the following: