Power Over Ethernet Description, POE

POE

Power Over Ethernet

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Power Over Ethernet Description

The Ethernet interface is a cable bus which runs over copper or fiber. However only the copper interfaces which use differential twisted pairs, use Power Over Ethernet [POE]. This page describes the POE interface. The 'normal' Ethernet network is defined by IEEE 802.3. A description of the 802.3 interface is found on the main Ethernet page. POE uses the spare wires not used by the Ethernet interface to deliver a DC voltage over the cable. Pins 4-5 and pairs 7-8 are used for POE, the pinout table is shown below

{Ethernet Interface Bus Index}

Power over Ethernet Bus Pin-Out

The pinout table lists one of three possible POE Alternative connections. The two other types will be listed soon.

**Twisted Pair POE Ethernet [AII]**
Pin #	Signal Name	Function
1	TD+	Transmit Data
2	TD-	Transmit Data
3	RD+	Receive Data
4	Positive Vport	Power-Over-Ethernet
5	Positive Vport	Power-Over-Ethernet
6	RD-	Receive Data
7	Negitive Vport	Power-Over-Ethernet
8	Negitive Vport	Power-Over-Ethernet

Refer to the AUI Pinout page for the pin out of the AUI connector.

{Ethernet Interface Bus Index}

Ethernet Bus Interface IC Manufacturers

This is a listing for hybrid type modules and IC's which develop or control Power over Ethernet interfaces.
Regular Ethernet interface Integrated Circuits are listed on the main Ethernet page.

freescale {IEEE 802.3af Powered Devices (PD) and a high performance current mode switching regulator}

intersil {PoE PWM Controllers}

Linear Technology {PoE Power Supply}

Maxim {PoE DC-DC Controllers}

PowerDsine Ltd. {Power over Ethernet Manager, POE Driver IC, 16-bit Microcontroller Unit (MCU), POE DIMMS, POE SIPs}

Silver Telecom Ltd. {PoE SIP modules}

Texas Instruments {IEEE 802.3af PoE Powered Device Controllers, IEEE 802.3af PD Controller with Integrated DC/DC}

All other types are listed off the main IC Manufacturer page. {This Site}

{Ethernet Interface Index}

Ethernet Online Standards Information

Telecommunications and information exchange between systems-Local and metropolitan area networks
ANSI/IEEE 802.3 and ISO/IEC 8802-3
ANSI/IEEE 802.3af Power Over Ethernet [2003]
There are many variations which are not listed here.

Institute of Electrical and Electronics Engineers, Inc. IEEE

{Ethernet Bus Index}

Ethernet Bus Connector Vendors

Regular Ethernet interface connectors are listed on the main Ethernet page.
All other types and manufacturers are listed on the Connector Manufacturer page {This web site}

POE Surge Products

AC Data Systems
{Power over Ethernet Surge device, Outdoor rated}

{Back to Ethernet Bus Index}

Electrical Engineering Design Key words: Ethernet Bus, POE, Power Over Ethernet, Ethernet Physical and Electrical layers, Physical, Mechanical, Type, Description, Brief, ICs, Integrated Circuits, Vendors, Products, Manufacturers, specification, Personal Computer, NICK card, CSMA, LAN, Manufacturers, Manchester Encoding, IEEE802.3


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