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
9-13
Cisco Unified Wireless IP Phone 7921G Administration Guide for Cisco Unified CallManager Release 4.1, 4.2, 5.0
OL-10802-02
Chapter 9 Troubleshooting the Cisco Unified Wireless IP Phone 7921G
Resolving Voice Quality and Roaming Problems
Verifying that the Phones Have Not Been Intentionally Reset
If you are not the only administrator with access to Cisco Unified CallManager,
you should verify that no one else has intentionally reset the phones.
Eliminating DNS or Other Connectivity Errors
If the phone does not register with Cisco Unified CallManager, check to see if you
are using host names or IP addresses for Cisco
Unified CallManager servers.
To eliminate DNS or other connectivity errors, follow these steps:
Procedure
Step 1 Reset the phone to factory defaults. See the “Erasing the Local Configuration”
section on page 9-25 for details.
Step 2 Modify DHCP and IP settings:
a. Disable DHCP. See the “Configuring DHCP Settings” section on page 5-8 for
details.
b. Assign static IP values to the phone. See the “Configuring DHCP Settings”
section on page 5-8 for details. Use the same default router setting used for
other functioning Cisco Unified IP Phones.
c. Assign a TFTP server. See the “Configuring an Alternate TFTP Server”
section on page 5-10 for details. Use the same TFTP server used for other
functioning Cisco Unified IP Phones.
Step 3 From Cisco Unified CallManager, choose System > Server and verify that the
server is referred to by its IP address and not by its host name.
Note Cisco recommends that you configure IP addresses only and not host
names to eliminate the DNS resolution in the phone registration process.