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Chapter 10 PoE
Note:
1. Only T1500G-10MPS/T1500G10PS supports PoE function.
2. T1500G-10PS only support 802.3af standard, while T1500G-10MPS supports both IEEE
802.3af and IEEE802.3at standard.
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 falls 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.
T1500G-10MPS/T1500G-10PS is a Power Sourcing Equipment (PSE). All the Auto-Negotiation
RJ45 ports 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.
PoE function can be configured in the two sections, PoE Config and PoE Time-Range.
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