Alcatel OS6400-48 Hardware User Guide - Page 85

Managing Power over Ethernet (PoE

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5 Managing Power over Ethernet (PoE) Power over Ethernet (PoE) is supported on OmniSwitch 6400 Series switches and provides inline power directly from the switch's Ethernet. Powered Devices (PDs) such as IP phones, wireless LAN stations, Ethernet hubs, and other access points can be plugged directly into the Ethernet. From these RJ-45 the devices receive both electrical power and data flow. As the feature reduces devices' dependence on conventional power sources, PoE eliminates many restrictions that traditional electrical considerations have imposed on networks. In a PoE configuration, Power Source Equipment (PSE) detects the presence of a PD and provides an electrical current that is conducted along the data cable. The PD operates using the power received via the Ethernet data cable; no connection to an additional power source (e.g., an AC wall socket) is required. Note. There are several general terms used to describe the feature, PoE. The terms Power over Ethernet (PoE), Power over LAN (PoL), Power on LAN (PoL), and Inline Power are synonymous terms used to describe the powering of attached devices via Ethernet. For consistency, this chapter and the CLI Command Reference Guide refer to the feature as Power over Ethernet (PoE). Additional terms, such as Powered Device (PD) and Power Source Equipment (PSE) are not synonymous with PoE, but are directly related to the feature: • PD refers to any attached device that uses a PoE data cable as its only source of power. Examples include access points, such as IP telephones, Ethernet hubs, wireless LAN stations, etc. • PSE refers to power sourcing equipment, which provides power to a single link section. PSE main functions include searching the PD, optionally classifying the PD, supplying power to the link section only if the PD is detected, monitoring the power on the link section, and scaling power back to detect level when power is no longer requested or required. As the OmniSwitch fully supports 10/100/1000 Ethernet connectivity, you may also attach non-PD equipment, such as computer workstations, printers, servers, etc. to the PoE. See Chapter 2, "OmniSwitch 6400 Series Chassis and Hardware Components." for more information on the OmniSwitch 6400 Series chassis. Note. Alcatel-Lucent recommends that PoE-enabled switches with attached IP telephones should have operational power supply redundancy at all times for 911 emergency requirements. In addition, both the switch and the power supply should be plugged into an Uninterruptible Power Source (UPS). OmniSwitch 6400 Series Hardware Users Guide July 2010 page 5-1

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OmniSwitch 6400 Series Hardware Users Guide
July 2010
page 5-1
5
Managing Power over
Ethernet (PoE)
Power over Ethernet (PoE) is supported on OmniSwitch 6400 Series switches and provides inline power
directly from the switch’s Ethernet. Powered Devices (PDs) such as IP phones, wireless LAN stations,
Ethernet hubs, and other access points can be plugged directly into the Ethernet. From these RJ-45 the
devices receive both electrical power and data flow.
As the feature reduces devices’ dependence on conventional power sources, PoE eliminates many restric-
tions that traditional electrical considerations have imposed on networks.
In a PoE configuration, Power Source Equipment (PSE) detects the presence of a PD and provides an elec-
trical current that is conducted along the data cable. The PD operates using the power received via the
Ethernet data cable; no connection to an additional power source (e.g., an AC wall socket) is required.
Note.
There are several general terms used to describe the feature, PoE. The terms
Power over Ethernet
(PoE)
,
Power over LAN (PoL), Power on LAN (PoL)
, and
Inline Power
are synonymous terms used to
describe the powering of attached devices via Ethernet. For consistency, this chapter and the
CLI
Command Reference Guide
refer to the feature as
Power over Ethernet (PoE)
.
Additional terms, such as
Powered Device (PD)
and
Power Source Equipment (PSE)
are not synonymous
with PoE, but are directly related to the feature:
•
PD
refers to any attached device that uses a PoE data cable as its only source of power. Examples
include access points, such as IP telephones, Ethernet hubs, wireless LAN stations, etc.
•
PSE
refers to power sourcing equipment, which provides power to a single link section. PSE main
functions include searching the PD, optionally classifying the PD, supplying power to the link section
only if the PD is detected, monitoring the power on the link section, and scaling power back to detect
level when power is no longer requested or required.
As the OmniSwitch fully supports 10/100/1000 Ethernet connectivity, you may also attach non-PD equip-
ment, such as computer workstations, printers, servers, etc. to the PoE. See
Chapter 2, “OmniSwitch 6400
Series Chassis and Hardware Components.”
for more information on the OmniSwitch 6400 Series chassis.
Note.
Alcatel-Lucent recommends that PoE-enabled switches with attached IP telephones should have
operational power supply redundancy at all times for 911 emergency requirements. In addition, both the
switch and the power supply should be plugged into an Uninterruptible Power Source (UPS).