PoE meaning in Information Technology ?

Answer:

What is Power over Ethernet mean?

Power over Ethernet, or PoE, describes any of several standards or ad hoc systems that pass electric power along with data on twisted-pair Ethernet cabling. This allows a single cable to provide both data connection and electric power to devices such as wireless access points (WAPs), Internet Protocol (IP) cameras, and voice over Internet Protocol (VoIP) phones.

There are several common techniques for transmitting power over Ethernet cabling. Three of them have been standardized by Institute of Electrical and Electronics Engineers (IEEE) standard IEEE 802.3 since 2003. These standards are known as alternative A, alternative B, and 4PPoE. For 10BASE-T and 100BASE-TX, only two of the four signal pairs in typical Cat 5 cable are used. Alternative B separates the data and the power conductors, making troubleshooting easier. It also makes full use of all four twisted pairs in a typical Cat 5 cable. The positive voltage runs along pins 4 and 5, and the negative along pins 7 and 8.

Alternative A transports power on the same wires as data for 10 and 100 Mbit/s Ethernet variants. This is similar to the phantom power technique commonly used for powering condenser microphones. Power is transmitted on the data conductors by applying a common voltage to each pair. Because twisted-pair Ethernet uses differential signaling, this does not interfere with data transmission. The common-mode voltage is easily extracted using the center tap of the standard Ethernet pulse transformer. For Gigabit Ethernet and faster, both alternatives A and B transport power on wire pairs also used for data since all four pairs are used for data transmission at these speeds.

4PPoE provides power using all four pairs of a twisted-pair cable. This enables higher power for applications like Pan–Tilt–Zoom (PTZ) cameras, high-performance WAPs, or even charging laptop batteries.

In addition to standardizing existing practice for spare-pair (Alternative B), common-mode data pair power (Alternative A) and 4-pair transmission (4PPoE), the IEEE PoE standards provide for signaling between the power sourcing equipment (PSE) and powered device (PD). This signaling allows the presence of a conformant device to be detected by the power source, and allows the device and source to negotiate the amount of power required or available.

reference

Full Form	Category
Program Of Emphasis	Academic & Science
Principles of Engineering	Academic & Science
Preponderance Of Evidence	Academic & Science
Polyolester	Academic & Science
Fort Polk (la)	Airport Code
Preparation Of Estimate	Business
Predict Observe Explain	Business
Pay Our Expenses	Business
Predict, Observe, Educate	Community
Paid, Owned, Earned	Community
Provider Outreach and Education	Community
Procedurals Occurring Elsewhere	Computer Assembly Language
Persistent Object Environment	Computing
Perl Over Ethernet	Computing
Proof Of Entitlement	Computing
Personally Owned Equipment	Computing
Path of Exile	Computing
Prison Of Elders	Computing
Prison Of Electronic	Computing
Po.et	Cryptocurrency
People Opportunity Emotive	General
Path Of Excretement	General
Phylogeny Ontogeny Epigenesis	General
Program Outcome Evaluation	General
Problem Of Evil	General
The Perl Object Environment	General
Post Occupancy Evaluation	General
People Of Earth	General
Purity Of Essence	General
Paradise-on-Earth (Resort)	General
Perl Object Environment	General
Professional Office Environments	General
Point of Existence	General
Peace On Earth	General
Ports of Entry	General
Predict Observe and Explain	General
Path of	General
Points Over Expected	General
Plan of Expenditures	General
Power over Et	General
Proof of Eligibility	General
Powerhouse Of Entertainment	General
Program Office Estimate	General
Place Of Employment	Governmental
Port Of Entry	Governmental
Process Of Elimination	Governmental
Protector of Emigrants	Governmental
PAWAPURI ROAD	Indian Railway Station
Power over Ethernet	Information Technology
Portal Of Evil	Internet
Prince of Egypt	Jobs
Prevention Outreach and Education	Medical
Phylogeny Ontogeny And Epigenesis	Medical
Pediatric Oncology Education	Medical
Physician Order Entry	Medical
Port of Embarkation	Military and Defence
Point of Origin Energetics	Military and Defence
Power Over Internet	Networking
Ppp (point-to-point Protocol) Over Ethernet	Networking
Parallel Operating Environment	Networking
Peugeot Open Europe	Regional
Pieces Of Eight	Regional
Peters Operating Environment	Softwares
Pilot Operational Equipment	Space Science
Point of Elimination	Sports
Polk AAF Airport	Transport & Travel