Poe Configuration; Poe Overview; Advantages; Composition - HP V1910 Switch Series User Manual

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 Figure
Figure 423 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.
Device with multiple PSEs—For a device with multiple PSEs, an interface card with the PoE power

supply capability is a PSE. The system uses PSE IDs to identify different PSEs.
423, a PoE system consists of PoE power, PSE, power interface (PI), and PD.
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