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PoE configuration
NOTE:
Only HP V1910-24G-PoE (365W) Switch JE007A and HP V1910-24G-PoE (170W) Switch JE008A
support the PoE function.
PoE overview
Power over Ethernet (PoE) means that power sourcing equipment (PSE) supplies power to powered devices
(PDs) from Ethernet interfaces through twisted pair cables.
Advantages
Reliable—Power is supplied in a centralized way so that it is very convenient to provide a backup
power supply.
Easy to connect—A network terminal requires no external power supply but only an Ethernet cable.
Standard—In compliance with IEEE 802.3af, and a globally uniform power interface is adopted.
Promising—It can be applied to IP telephones, wireless LAN access points (APs), portable chargers,
card readers, web cameras, and data collectors.
Composition
As shown in a, a PoE system consists of PoE power, PSE, power interface (PI), and PD.
a. PoE system diagram
PoE power
The whole PoE system is powered by the PoE power.
PSE
A PSE is a device supplying power for PDs. A PSE can be built-in (Endpoint) or external (Midspan). A built-in
PSE is integrated in a switch or router, and an external PSE is independent from a switch or router.
The HP PSEs are built in, and can be classified into two types:
Device with a single PSE—Only one PSE is available on the device; so the whole device is considered
as a PSE.
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