Specifications
9-12
Cisco Unified IP Phone 7906G and 7911G for Cisco Unified Communications Manager 8.0
OL-21033-01
Chapter 9 Troubleshooting and Maintenance
Resetting or Restoring the Cisco Unified IP Phone
Resetting or Restoring the Cisco Unified IP Phone
There are two methods for resetting or restoring the Cisco Unified IP Phone:
• Performing a Basic Reset, page 9-12
• Performing a Factory Reset, page 9-13
Performing a Basic Reset
Performing a basic reset of a Cisco Unified IP Phone provides a way to recover if the phone experiences
an error and provides a way to reset or restore various configuration and security settings.
Table 9-3 describes the ways to perform a basic reset. You can reset a phone with any of these operations
any time after the phone has started up. Choose the operation that is appropriate for your situation.
Phone call cannot be
established
The phone does not have a DHCP IP address, is unable to register to Cisco Unified
Communications Manager, and shows a Configuring IP or Registering message.
Verify the following:
1. The Ethernet cable is attached.
2. The CCM service is running on the Cisco Unified Communications Manager server.
3. Both phones are registered to the same Cisco Unified Communications Manager.
4. Audio server debug and capture logs are enabled for both phones. If needed, enable
Java debug.
<<REVIEWERS: Is other action recommended after these items are checked?>>
Call established with the iLBC
protocol does not show that the
iLBC codec is being used
Call statistics display does not show iLBC as the receiver/sender codec.
1. Check the following using Cisco Unified Communications Manager Administration:
–
Both phones are in the iLBC device pool.
–
The iLBC device pool is configured with the iLBC region.
–
The iLBC region is configured with the iLBC codec.
2. Capture a sniffer trace between the phone and Cisco Unified Communications Manager
and verify that SCCP messages,OpenReceiveChannel, and StationMediaTransmit
messages have media payload type value equal to 86. If so, the problem is with the
phone; otherwise, the problem is with the Cisco Unified Communications Manager
configuration.
3. Enable audio server debug and capture logs from both phones. If needed, enable Java
debug.
<<REVIEWERS: Is other action recommended after these items are checked?>>
Table 9-2 Cisco Unified IP Phone Troubleshooting (continued)
Summary Explanation