Specifications
Table Of Contents
- Cisco Unified Wireless IP Phone 7921G Administration Guide for Cisco Unified CallManager Release 4.1, 4.2, 5.0 and Later
- Contents
- Preface
- An Overview of the Cisco Unified Wireless IP Phone 7921G
- An Overview of the Voice Over IP Wireless Network
- Understanding the Wireless LAN
- Components of the VoIP Wireless Network
- Voice Over IP Wireless Network Configuration
- Site Survey Verification
- Setting Up the Cisco Unified Wireless IP Phone 7921G
- Before You Begin
- Installing the Cisco Unified Wireless IP Phone 7921G
- Powering On the Cisco Unified Wireless IP Phone 7921G
- Understanding the Phone Startup Process
- Using the Cisco Unified Wireless IP Phone 7921G Web Pages
- Using the USB Connection for Initial Phone Configuration
- Updating Phones Remotely
- Configuring Network Profiles
- Configuring USB Settings
- Configuring Trace Settings
- Using System Settings
- Configuring Settings on the Cisco Unified Wireless IP Phone 7921G
- Accessing Network and Phone Settings
- Configuring Network Profile Settings
- Changing Phone Settings
- Configuring the Security Certificate on the Phone
- Changing the USB Configuration
- Configuring Features, Templates, Services, and Users
- Configuring Cisco Unified Wireless IP Phones in Cisco Unified CallManager
- Telephony Features Available for the Phone
- Specific Configuration Options for the Cisco Unified Wireless IP Phone 7921G
- Configuring Softkey Templates
- Modifying Phone Button Templates
- Setting Up Services
- Configuring Corporate and Personal Directories
- Adding Users to Cisco Unified CallManager
- Managing the User Options Web Pages
- Creating Custom Phone Rings
- Viewing Security, Device, Model, and Status Information on the Phone
- Monitoring the Cisco Unified Wireless IP Phone Remotely
- Troubleshooting the Cisco Unified Wireless IP Phone 7921G
- Resolving Startup and Connectivity Problems
- Resolving Voice Quality and Roaming Problems
- General Troubleshooting Information
- Erasing the Local Configuration
- Providing Information to Users By Using a Website
- Supporting International Users
- Physical and Operating Environment Specifications
- Checklist for Deploying the Cisco Unified Wireless IP Phone 7921G
- Index
Chapter 2 An Overview of the Voice Over IP Wireless Network
Components of the VoIP Wireless Network
2-12
Cisco Unified Wireless IP Phone 7921G Administration Guide for Cisco Unified CallManager Release 4.1, 4.2, 5.0
OL-10802-02
Related Topics
• Understanding the Phone Startup Process, page 3-26
• Components of the VoIP Wireless Network, page 2-8
• Configuring DHCP Settings, page 5-8
Interacting with Cisco Unified Wireless Access Points
Wireless voice devices use the same access points as wireless data devices.
However, voice traffic over a WLAN requires different equipment configurations
and layouts than a WLAN that is used exclusively for data traffic. Data
transmission can tolerate a higher level of RF noise, packet loss, and channel
contention than voice transmission. Packet loss during voice transmission can
cause choppy or broken audio and make the phone call inaudible.
Wired Equivalent
Privacy (WEP)
Wireless security protocol for
encrypting data that uses an
encryption key stored on the phone
and access point.
Cisco Unified Wireless
IP
Phone 7921G can use either static
WEP or dynamic WEP keys for
encryption, depending on the
network security configuration.
Wireless Protected
Access (WPA)
Provides stronger authentication,
encryption key management and
alternative encryption and message
integrity methods.
Cisco Unified Wireless
IP
Phone 7921G supports WPA,
WPA2, and WPA Pre-shared key
authentication, including encryption
using TKIP and MIC (message
integrity check).
Table 2-3 Supported Networking Protocols on the Cisco Unified Wireless IP Phone 7921G
Networking Protocol Purpose Usage Notes