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Cisco 4100 Series and 4400 Series WLCs
The Cisco 4100 Series WLCs and 4400 Series WLCs are designed for medium− to large−sized Enterprise
facilities. Both series support the PoE option. You can use the PoE option to power the lightweight APs that
connect to the controller. In addition, each 4400 WLC supports an optional redundant power supply in order
to ensure maximum availability.
Cisco 5500 Series WLCs
The Cisco 5500 Series Wireless Controller is a highly scalable and flexible platform that enables systemwide
services for mission−critical wireless in medium to large−sized enterprises and campus environments. The
controller can be powered using one or two power supply units. When the controller is equipped with two
power supply units, the power supplies are redundant. Either power supply continues to power the controller
should the other power supply unit fail. Also, the power supplies are hot swappable; you do not need to
remove power from the controller to replace a power supply. For more information on power supply to the
WLC, refer to Installing a Power Supply Unit section of the Cisco 5500 Series Wireless Installation Guide.
Related Information
Cisco Aironet 350 Series Troubleshooting TechNotes•
Cisco Aironet Power Over Ethernet Application Note•
Wireless Support Page•
Technical Support & Documentation − Cisco Systems•
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Updated: May 29, 2008 Document ID: 21480