Managing Power Over Ethernet (Poe) - Alcatel-Lucent OmniSwitch 6450 User Manual

5 Managing Power over
Power over Ethernet (PoE) is supported on OmniSwitch 6450 switches and provides inline power directly
from the switch's Ethernet ports. Powered Devices (PDs) such as IP phones and wireless APs can be
powered directly from the switch's RJ-45 ports.
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 on Terminology. There are several general terms used to describe this feature. The terms Power
over Ethernet (PoE), LAN Power, Power over LAN (PoL), Power on LAN (PoL), and Inline Power are
synonymous terms used to describe the powering of attached devices through Ethernet ports. This
documentation refers to the feature as Power over Ethernet (PoE) and related CLI commands use the
syntax, lanpower.
Additional terms, such as Powered Device (PD) and Power Source Equipment (PSE) are terms that are not
synonymous, but are directly related to PoE.
•
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, and so on.
•
PSE refers to the actual hardware source of the electrical current for PoE.
As the OmniSwitch 6450 switches fully support Ethernet connectivity, you may also attach non-PD
equipment, such as computer workstations, printers, servers, etc. to PoE ports. See
"OmniSwitch 6450 Chassis and Hardware Components,"
chassis.
Important. 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 6450 Hardware Users Guide
Ethernet (PoE)
for more information on the OmniSwitch 6450
July 2012
Chapter 2,
page 5-1