Q: How does Power over Ethernet (PoE) work?

Power over Ethernet (PoE) is a way to send power and data over the same Ethernet cable. You can power devices like IP cameras, VoIP phones, and wireless access points without running separate power cables.

There are two types of PoE devices:

Power Sourcing Equipment (PSE): These devices supply power over Ethernet cables. Examples are PoE switches, network cards, injectors, and fiber media converters.

Powered Devices (PD): These devices receive power over Ethernet cables. Examples are IP cameras, IP phones, small Ethernet switches, and wireless access points. There are different standards for PoE. The most common standard is IEEE 802.3af, which allows up to 15 watts of power to be sent over an Ethernet cable. More recent standards allow for even more power, up to 100 watts.

PoE has many advantages. It can reduce the cost and clutter of additional power supplies and eliminate the hassle and expense of running separate power to remote locations.

Here are some examples of how PoE can be used:

• You can use PoE to power IP cameras in hard-to-reach places.
• You can use PoE to power VoIP phones in offices without a power outlet nearby.
• You can use PoE to power wireless access points in outdoor areas.

PoE is a great option if you want to power devices without running separate power cables. It is a cost-effective and convenient way to keep your devices running.