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Chapter 9 PoE
Note: Only TL-SG1016PE supports configuring PoE function.
PoE (Power over Ethernet) technology describes a system to transmit electrical power along
with data to remote devices over standard twisted-pair cable in an Ethernet network. It is
especially useful for supplying power to IP telephones, wireless LAN access points, cameras
and so on.
Composition
A PoE system usually consists of PSE and PD.
PSE: Power sourcing equipment (PSE) is a device such as a switch that provides power on the
Ethernet cable to the linked device.
PD: A powered device (PD) is a device accepting power from the PSE and thus consumes
energy. PDs fall into two types, standard PDs and nonstandard PDs. Standard PDs refer to the
powered devices that comply with IEEE 802.3af and IEEE 802.3at. Examples include wireless
LAN access points, IP Phones, IP cameras, network hubs, embedded computers etc.
Advantage
Cheap cabling: The remote device such as cameras can be powered by PSE in no
need of prolonging its power cord additionally and Ethernet cable is much cheaper
than AC wire or power cord.
Easy to connect: PoE uses only one Ethernet cable with no need of external power
supply.
Reliable: A powered device can be either powered by PSE using Ethernet cable or
powered through the provided power adapter. It is very convenient to provide a
backup power supply for the PDs.
Flexibility: In compliance with IEEE 802.3af and IEEE 802.3at, global organizations can
deploy PoE everywhere without concern for any local variance in AC power standards,
outlets, plugs, or reliability.
Wide use: It can be applied to wireless LAN access points, IP Phones, IP cameras,
network hubs, embedded computers etc.
TL-SG1016PE is a Power Sourcing Equipment (PSE). Ports 1-8 on the switch support Power
over Ethernet (PoE) function, which can automatically detect and supply power for those
powered devices (PDs) complying with IEEE 802.3af and IEEE 802.3at. The maximum power
TL-SG1016PE can supply is 110W and the maximum power each PoE port can supply is 30W.
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