Power Over Ethernet On The At-X530-28Gpxm Switch; Poe Standards - Allied Telesis x530 Series Installation Manual

Chapter 1: Overview

Power Over Ethernet on the AT-x530-28GPXm Switch

PoE Standards

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The AT-x530-28GPXm switch features PoE on twisted pair ports 1 - 24.
With PoE, the switch supplies DC power to network devices over the same
twisted pair cables that carry the network traffic.
PoE can make it easier to install networks. The selection of a location for a
network device can be limited by whether there is a power source nearby.
This often limits equipment placement or requires the added time and cost
of having additional electrical sources installed. With PoE, you can install
PoE-compatible devices wherever they are needed without having to
worry about whether there are power sources nearby.
A device that provides PoE to network devices is referred to as power
sourcing equipment (PSE). It functions as a central power source for other
network devices.
Devices that receive their power from a PSE are called powered devices
(PD). Examples include wireless access points, IP telephones, webcams,
and even other Ethernet switches.
The AT-x530-28GPXm switch automatically determines whether devices
connected to its ports are powered devices. Ports that are connected to
network nodes that are not powered devices (that is, devices that receive
their power from another power source) function as regular Ethernet ports,
without PoE. The PoE feature remains activated on the ports but no power
is delivered to the devices.
The AT-x530-28GPXm switch supports these PoE standards:
PoE (IEEE 802.3af): This standard provides up to 15.4 watts at the

switch port for powered devices that require up to 13.0 watts.
PoE+ (IEEE 802.3at): This standard provides up to 30.0 watts at

the switch port for powered devices that require up to 25.5 watts.