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
9-23
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
General Troubleshooting Information
Related Topics
• Logging Information for Troubleshooting, page 9-24
• General Troubleshooting Information, page 9-20
One-way audio on phone Check that the speaker is functioning properly. Adjust the
speaker volume setting and call the phone to check the speaker.
Check that ARP caching has been set on the AP. See “Voice
Over IP Wireless Network Configuration” section on
page 2-27.
Delays when roaming from one
location to another
If Cisco Catalyst 45xx series switches are being used as the
main Layer 3 switches in the network, ensure that the
supervisor blades are a minimum SUP2+ or later version. The
Cisco
Unified Wireless IP Phone 7921G (or any wireless
client) experiences roaming delays when an earlier version
(SUP 1 or SUP2) blade is used.
Phone firmware downgrades After applying a Cisco Unified CallManager upgrade or patch,
that is older than the current Cisco
Unified Wireless
IP
Phone 7921G firmware, the phones could automatically
downgrade to the load contained in the patch. Check the
Cisco
Unified CallManager 7921G device default image in the
TFTP folder to fix this problem.
Battery life is shorter than specified An unstable RF environment can cause the phone to remain in
active mode because it is constantly seeking an AP. This
reduces the battery life considerably. When leaving an area of
coverage, shut down the phone.
Higher phone transmit power can affect battery life.
To maximize idle time on the phone and conserve battery life,
you need to optimize the registration time so the phone can go
into power save mode more often.
Table 9-3 unified IP phone Troubleshooting Tips (continued)
Summary Explanation