Poe Overview; Chapter 1 Poe Configuration; Introduction To Poe; Poe Features Supported By S - Huawei Quidway S3900 Series Operation Manual

Operation Manual – PoE & PoE Profile
Quidway S3900 Series Ethernet Switches-Release 1510

Chapter 1 PoE Configuration

1.1 PoE Overview

1.1.1 Introduction to PoE

Power over Ethernet (PoE) uses 10BaseT, 100Base-TX, and 1000Base-T twisted
pairs to supply power to the remote powered devices (PD) in the network and
implement power supply and data transmission simultaneously.
I. Advantages of PoE
Reliability: The centralized power supply provides backup convenience,
unified management, and safety.
Easy connection: Network terminals only require an Ethernet cable, but no
external power supply.
Standard: PoE conforms to the 802.3af standard and uses a globally uniform
power interfaces;
Bright application prospect: PoE can be applied to IP phones, wireless
access points (APs), chargers for portable devices, card readers, cameras,
and data collection.
II. PoE components
Power sourcing equipment (PSE): PSE is comprised of the power and the
PSE functional module. It can implement PD detection, PD power information
collection, PoE, power supply monitoring, and power-off for devices.
PD: PDs receive power from the PSE. PDs include standard PDs and
nonstandard PDs. Standard PDs conform to the 802.3af standard, including
IP phones, WLAN APs, network cameras and so on.
Power interface (PI): PIs are RJ45 interfaces which connect PSE/PDs to
network cables.

1.1.2 PoE Features supported by S3900

PoE-enabled S3900 series Ethernet switches include:
S3928P-PWR-SI
S3928P-PWR-EI
S3952P-PWR-EI
A PoE-enabled S3900 switch has the following features:
As the PSE, it supports the IEEE802.3af standard. It can also supply power to
some PDs that do not support the 802.3af standard.
It can deliver data and current simultaneously through data wires (1, 3, 2, and
6) of category-3/5 twisted pairs.
Chapter 1 PoE Configuration
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