In this video, power over ethernet technology has been explained, which is also commonly known as PoE.

What is PoE?

Power over Ethernet is the technology, in which along with the data, power is also carried on the ethernet cables, which can be used to power up the networked devices, like IP Phone, IP cameras, Access points etc.

Now to carry the power over this Ethernet data cables, certain IEEE standards are defined.

1) IEEE 802.3.af
2) IEEE 802.3.at
3) IEEE 802.3. bt

These standards define certain properties of the established link, like what is the maximum DC power which can be safely transferred over the network cables, what is the range of DC voltage, what should be the cable resistance, what is the allowable maximum current over the link etc.

Advantages of PoE:

The advantage of PoE is that installation of Ethernet connected devices to the inaccessible locations where it is difficult to provide power supply or where too many cables are in the way. Also, there is no need for the separate cable for the powering up the devices. So, using PoE it is possible to maximise the savings on the installation cost.

PoE terminologies:

Power Source Equipment(PSE):

The device or equipment which supplies power to the networked devices is known as PSE. e,g Network Switch

Powered Devices (PD):

The devices, which receives power over the ethernet cables are known as Powered Devices. (e.g IP cameras, Acces points, IP telephone etc.)

The timestamps for the different topics in the video is given below:

0:33 What is PoE?

1:24 Advantages of PoE

2:16 PoE Terminology

2:30 Signalling in PoE (To check whether the connected device is PoE enabled or not?)

5:42 Cable Connectivity in PoE (Type A and Type B)







This video will be helpful to everyone in understanding the Power over Ethernet (PoE) Technology.

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