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
2-27
Cisco Unified Wireless IP Phone 7921G Administration Guide for Cisco Unified CallManager Release 4.1, 4.2, 5.0
OL-10802-02
Chapter 2 An Overview of the Voice Over IP Wireless Network
Voice Over IP Wireless Network Configuration
Voice Over IP Wireless Network Configuration
This section provides configuration guidelines for deploying wireless IP phones
in the WLAN and includes these topics:
• Wireless Network Requirements for VoIP, page 2-27
• Configuring the Wireless Network for Voice, page 2-28
Wireless Network Requirements for VoIP
When configuring voice over the wireless LAN, use access points that run Cisco
IOS Version 12.3(8)JA or later. Controllers should be running version 4.0 and
higher with IOS Version 12.3(8)JX or later.
The Cisco Unified Wireless IP Phone 7921G supports Cisco Aironet Access
Points (APs) that can run Cisco IOS in autonomous mode and APs that run in
lightweight mode with lightweight access point protocol (LWAPP) and use a
wireless LAN controller.
Table 2-7 lists the supported AP models and their
operation mode in the WLAN.
Note Voice over the wireless LAN (VoWLAN) does not currently support MESH
technology such as Cisco Aironet 1500 Series Lightweight Outdoor Mesh Access
Points.
DNS Server 1
DNS Server 2
If the system is configured to use host names for
servers instead of IP addresses, identifies the primary
and secondary DNS server to resolve host names.
TFTP Server 1
TFTP Server 2
Identifies the TFTP servers that the phone uses to
obtain configuration files.
Table 2-6 Static IP Addresses When DHCP is Disabled (continued)
Static Setting Description