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 9 Troubleshooting the Cisco Unified Wireless IP Phone 7921G
Resolving Voice Quality and Roaming Problems
9-14
Cisco Unified Wireless IP Phone 7921G Administration Guide for Cisco Unified CallManager Release 4.1, 4.2, 5.0
OL-10802-02
Step 4 From Cisco Unified CallManager, select Device > Phone and verify that you have
assigned the correct MAC address to this Cisco
Unified IP Phone.
To determine the MAC address of a phone, see the “Viewing Device Information”
section on page 7-6.
Step 5 Power cycle the phone.
Symptom: The unified IP phone Has Audio Problems
When users report that active phone calls have poor voice quality that includes
choppy audio, static or gaps in audio, or no audio, you can use the following
suggestions to identify the cause of the problem.
These sections can assist you with the following symptoms:
• No Audio During a Connected Call, page 9-14
• One-Way Audio During a Connected Call, page 9-14
No Audio During a Connected Call
If you are using a release earlier than 2.0, then you must disable TKIP and MIC
features on the access point. These features are only supported with release 2.0
and later on the Cisco
Unified Wireless IP Phone 7921G.
One-Way Audio During a Connected Call
Use the following list to identify possible causes for the problem:
• Check the access point to see that the transmit power setting matches the
transmit power setting on the phone. One-way audio is common when the
access point power setting is greater (100mW) than that of the phone
(20mW).
Cisco Unified Wireless IP Phone 7921G Firmware supports dynamic
transmit power control (DTPC). The phone uses the transmit power that the
access point advertises upon association.