Cisco 8821

Cisco Wireless IP Phone 8821 and 8821-EX Wireless LAN Deployment Guide
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Contents
Cisco Wireless IP Phone 8821 and 8821-EX Overview ......................................................................................................................... 6!
Phone Models ......................................................................................................................................................................................... 6!
Requirements .......................................................................................................................................................................................... 6!
Site Survey .......................................................................................................................................................................................... 7!
Call Control ........................................................................................................................................................................................ 8!
Wireless LAN ..................................................................................................................................................................................... 8!
Protocols ............................................................................................................................................................................................... 12!
Wi-Fi ..................................................................................................................................................................................................... 12!
Regulatory ........................................................................................................................................................................................ 15!
Bluetooth ............................................................................................................................................................................................... 16!
Languages ............................................................................................................................................................................................. 17!
8821-EX Certifications ......................................................................................................................................................................... 17!
Battery Life ........................................................................................................................................................................................... 18!
Phone Care ........................................................................................................................................................................................... 20!
Accessories ........................................................................................................................................................................................... 20!
Wireless LAN Design .............................................................................................................................................................................. 22!
802.11 Network ..................................................................................................................................................................................... 22!
5 GHz (802.11a/n/ac) ....................................................................................................................................................................... 22!
2.4 GHz (802.11b/g/n) ...................................................................................................................................................................... 23!
Signal Strength and Coverage .......................................................................................................................................................... 24!
Data Rates ......................................................................................................................................................................................... 27!
Rugged Environments ...................................................................................................................................................................... 28!
Security ................................................................................................................................................................................................. 30!
Extensible Authentication Protocol - Flexible Authentication via Secure Tunneling (EAP-FAST) ............................................... 31!
Extensible Authentication Protocol - Transport Layer Security (EAP-TLS) ................................................................................... 32!
Protected Extensible Authentication Protocol (PEAP) .................................................................................................................... 34!
EAP and User Database Compatibility ............................................................................................................................................ 34!
Quality of Service (QoS) ....................................................................................................................................................................... 35!
Call Admission Control (CAC) ........................................................................................................................................................ 35!
Traffic Classification (TCLAS) ........................................................................................................................................................ 36!
QoS Basic Service Set (QBSS) ........................................................................................................................................................ 36!
Wired QoS ........................................................................................................................................................................................ 37!
Roaming ................................................................................................................................................................................................ 38!
Fast Secure Roaming (FSR) ............................................................................................................................................................. 38!
Interband Roaming ........................................................................................................................................................................... 40!
Scanning ........................................................................................................................................................................................... 40!
Power Management .............................................................................................................................................................................. 40!
Call Capacity ........................................................................................................................................................................................ 41!
Multicast ............................................................................................................................................................................................... 42!
Configuring the Cisco Wireless LAN .................................................................................................................................................... 42!
Cisco Wireless LAN Controller and Lightweight Access Points .......................................................................................................... 42!
802.11 Network Settings .................................................................................................................................................................. 43!
WLAN Settings ................................................................................................................................................................................ 55!
Controller Settings ............................................................................................................................................................................ 60!
Call Admission Control (CAC) ........................................................................................................................................................ 62!