C H A P T E R 13 Configuring Power Over Ethernet - Cisco Catalyst 4500 Series Configuration Manual

Power Management Modes
the PoE capabilities of individual power supplies. Support for PoE enables the system to power inline
devices, such as IP phones, IP video phones, and wireless access points over standard copper cabling
(Category 5, 5e, or 6 cabling).
In addition, with PoE, you do not need to provide wall power for each PoE enabled device. This
eliminates the cost for additional electrical cabling that is otherwise necessary for connected devices.
Moreover, PoE enables you to isolate critical devices on a single power system, enabling the entire
system to be supported by UPS backup.
You typically deploy a Catalyst 4500 series switch in one of two deployment scenarios. The first scenario
is data-only, which requires power to operate the switch and the associated modules. The second scenario
supports data and PoE (also termed "inline power") for deployments where the attached device derives
power from the Ethernet port.
Catalyst 4500 series switches can sense if a powered device is connected to a PoE module. They can
supply PoE to the powered device if there is no power on the circuit. (If there is power on the circuit, the
switch does not supply it.) The powered device can also be connected to an AC power source and supply
its own power to the voice circuit.
You should select the amount of PoE desired using the Cisco Power Calculator:
Note
http://tools.cisco.com/cpc/
Hardware Requirements
To power a device using PoE, your chassis must use at least one of the power supplies listed in
Table
Table 13-1
Switching Modules
WS-X4148-RJ45V
WS-X4224-RJ45V
WS-X4248-RJ21V
WS-X4248-RJ45V
WS-X4506-GB-T
WS-X4524-GB-RJ45V
WS-X4548-RJ45V+
WS-X4548-GB-RJ45V
WS-X4648-RJ45V-E
WS-X4648-RJ45V+E
Power Management Modes
If your switch has a module capable of providing PoE to end stations, you can set each interface on the
module to automatically detect and apply PoE if the end station requires power.
Software Configuration Guide—Release IOS XE 3.3.0SG and IOS 15.1(1)SG
13-2
13-1, and connect the device to at least one of the switching modules listed in
Hardware Requirements
Chapter 13 Configuring Power over Ethernet
Power Supplies
PWR-C45-1300ACV=
PWR-C45-1400DCV=
PWR-C45-2800ACV=
PWR-C45-4200ACV=
Table 13-1.
OL-25340-01