Cisco 8821

CHAPTER 2
VoIP Networks
•
Network Requirements, page 15
•
Wireless LAN, page 19
•
Wi-Fi Network Components, page 20
•
802.11 Standards for WLAN Communications, page 23
•
Security for Communications in WLANs, page 25
•
WLANs and Roaming, page 28
•
Cisco Unified Communications Manager Interaction, page 29
•
Voice Messaging System Interaction, page 29
Network Requirements
For the phone to successfully operate as an endpoint in your network, your network must meet the following
requirements:
•
VoIP Network
◦
VoIP is configured on your Cisco routers and gateways.
◦
Cisco Unified Communications Manager is installed in your network and is configured to handle
call processing.
•
IP network that supports DHCP or manual assignment of IP address, gateway, and subnet mask
•
Wireless LAN
◦
Access Points (APs) are configured to support voice over WLAN.
◦
Controllers and switches are configured to support voice.
◦
Security is implemented for authenticating wireless voice devices and users.
Cisco Wireless IP Phone 8821 and 8821-EX Administration Guide for Cisco Unified Communications Manager
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