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
9-6
Cisco Unified Wireless IP Phone 7921G Administration Guide for Cisco Unified CallManager Release 4.1, 4.2, 5.0
OL-10802-02
To verify that the phone is in the Cisco Unified CallManager database, choose
Device > Phone > Find from Cisco
Unified CallManager Administration to
search for the phone based on its MAC Address. (To determine the MAC address
of a phone, see the
“Viewing Device Information” section on page 7-6.)
If the phone is already in the Cisco Unified CallManager database, its
configuration file may be damaged. See the
“Creating a New Configuration File”
section on page 9-10 for assistance.
Checking Network Connectivity
If the network is down between the access point and the TFTP server or
Cisco
Unified CallManager, the phone cannot start up properly. Ensure that IP
connectivity exists between the WLAN and the Cisco
Unified CallManager and
TFTP servers.
Verifying TFTP Server Settings
The Cisco Unified Wireless IP Phone 7921G uses the TFTP server setting to
identify the primary TFTP server to use. If the TFTP server does not respond to
the request, then the CallManager1 (CM1) shows as TFTP_AS_CM if the phone
has not registered with Cisco
Unified CallManager before.
Note If the phone has previously registered with Cisco Unified CallManager,
the Cisco
Unified CallManager list information is cached in memory. If
TFTP fails, you must power cycle the phone to connect to the TFTP
server.
The phone tries to create a TCP connection to the TFTP IP address and then to the
gateway. If Cisco
Unified CallManager service is not running on the TFTP server,
or if SRST is not running on the gateway, the wireless
IP phone may continually
cycle while attempting to contact the identified TFTP
server.
The Cisco Unified Wireless IP Phone 7921G does not cache the IP information
passed from the DHCP server, so the TFTP request must be sent and responded to
every time the phone power cycles.
If you have assigned a static IP address to the phone, you must manually enter this
setting. See the
“Configuring IP Network Settings” section on page 4-21.