Cisco 8821 Manual page 121

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If None is selected, then no authentication is required and no encryption will be utilized.
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Select Save once the Wireless LAN Profile configuration is complete.
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The Cisco Wireless IP Phone 8821 and 8821-EX do not support the Network Access Profile option.
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To create a Wireless LAN Profile Group, navigate to Device > Device Settings > Wireless LAN Profile Group within
the Cisco Unified Communications Manager's Administration interface.
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From the Wireless LAN Profile Group page, select Add New.
Cisco Wireless IP Phone 8821 and 8821-EX Wireless LAN Deployment Guide
121