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 Startup and Connectivity Problems
9-8
Cisco Unified Wireless IP Phone 7921G Administration Guide for Cisco Unified CallManager Release 4.1, 4.2, 5.0
OL-10802-02
If you are using DHCP, check the IP addresses distributed by your DHCP server.
Be aware of DHCP conflicts and duplicate IP addresses. Refer to Understanding
and Troubleshooting DHCP in Catalyst Switch or Enterprise Networks, available
at this URL:
http://www.cisco.com/warp/customer/473/100.html#41
For information about determining and changing IP addressing, see “Configuring
IP Network Settings” section on page 4-21
Verifying DNS Settings
If you are using DNS to refer to Cisco Unified CallManager, you must ensure that
you have specified a DNS server. You should also verify that there is a CNAME
entry in the DNS server for the Cisco
Unified CallManager system.
You must also ensure that DNS is configured to do reverse look-ups. The default
setting on Windows 2000 is to perform forward-only look-ups.
For information about determining and changing DNS settings, see “Configuring
IP Network Settings” section on page 4-21.
Verifying Cisco Unified CallManager Settings
The Cisco Unified Wireless IP Phone 7921G attempts to open a TCP connection
to all the Cisco
Unified CallManager servers that are part of the assigned
Cisco
Unified CallManager group. Take one of these actions to verify
Cisco
Unified CallManager settings:
• On the Cisco Unified Wireless IP Phone 7921G, choose Menu > Network
Config > Current Configuration and look at the CallManager 1–4 options.
(See
“Viewing the Current Configuration” section on page 7-15.)
• If none of the Cisco Unified CallManager options contain IP addresses or
show Active or Standby, the phone is not properly registered with
Cisco
Unified CallManager. See the “Registering the Phone with Cisco
Unified CallManager” section on page 9-5 for tips on resolving this problem.