PoE (Power Over Ethernet Technology) and Its Benefits.

Power Over Ethernet Technology and Its Benefits

Overview of PoE Power-over-Ethernet is a term for a technology that enables the transmission of data and power on the same Ethernet cable, over a 100m transmission distance. This technology reduces the need for a separate power line and an electrical connection (AC) for powering the device.

The technology also helps reduce the need for cables and other accessories that are required for making a connection.

Working of PoE Each network cable comprises four twisted pairs of wires, which makes eight wires. The pairs that are used for sending information are known as data pairs and the unused pairs are referred to as spare pairs.

In PoE applications, each pair acts as a single conductor. This means you can use the two spare pairs or two data pairs for transmitting electrical current. PoE is usually injected into the cable at 48 V. Any voltage between 44 and 57 volts DC is considered ideal.

Power over Ethernet (PoE) Implementation PoE devices can be implemented as midspans or endspans. Powered devices (PDs) can receive power from both these types of devices.

Endspans: Endspan devices need PoE-enabled switches, and are usually preferred for new installations. An L2 switch supporting PoE is one of the brilliant examples of endspans.

Midspans: These devices utilize an injector or a powered patch panel, which is usually positioned between the PD and an Ethernet switch.

PoE Standardization IEEE 802.3af

provide up to 15.4 watts of DC power (at 48V DC) at each port.

IEEE 802.3at

provide up to 25.5 watts at 48V DC.

IEEE 802.3bt

provide up to 60 watts at 48V DC.

IEEE 802.3u

Developed for 100BASE-T4, 100BASE-TX, and100BASE-FX fast Ethernet applications

IEEE 802.3ab

Developed for 1000BASE-T Gbit/s Ethernet over twisted pair with a delivery speed of 1 Gbit/s (125 MB/s)

IEEE 802.3z

Developed for 1000BASE-X Gbit/s Ethernet over Fiber-Optic with a delivery speed of 1 Gbit/s (125 MB/s).

Benefits of PoE PoE technology has gained immense popularity over the years owing to the distinct benefits that it offers.

• Cost and Time Savings • Flexibility of Network Design • Easy & Smart Power Management • Reliability & Scalability

PoE Products offered by VERSITRON

PoE and PoE+ Switches

PoE Media Converters

PoE Injector

Applications of PoE The devices that use PoE for data and power supply are referred to as smart devices.

• PoS Kiosks

•

Security Access Controls

• LED Lighting Systems

•

Smart Clocks

• Routing Boxes and Networked Audio Breakout

•

Routers

• IPTV Decoders

•

VoIP Phones

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