H3C S7500 Series Ethernet Switches Operation Manual

Operation Manual – PoE
H3C S7500 Series Ethernet Switches Chapter 1
PoE Configuration
1-1
Chapter 1 PoE Configuration
When configuring PoE, go to these sections for information you are interested in:
z PoE Overview
z PoE Configuration
z Displaying PoE Configuration
z PoE Configuration Example
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
z Reliability: The centralized power supply provides backup convenience, unified
management, and safety.
z Easy connection: Network terminals only require an Ethernet cable, but no
external power supply.
z Standard: PoE conforms to the 802.3af standard and uses a globally uniform
power interface;
z 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
z 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.
z 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, and network cameras.
z Power interface (PI): PIs are RJ45 interfaces, which connect PSE/PDs with
network cables.