Voip Networks; Network Requirements - Cisco 8821 Administration Manual

VoIP Networks

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Network Requirements

For the phone to successfully operate as an endpoint in your network, your network must meet the following
requirements:
• VoIP Network
• IP network that supports DHCP or manual assignment of IP address, gateway, and subnet mask
• Wireless LAN
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
◦ 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.
◦ 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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C H A P T E R
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