Cisco 8831NR Administration Manual page 147

Troubleshooting and Maintenance
Metric Change
Conceal Ratio and Conceal Seconds increase
significantly
Conceal Ratio is near or at zero, but the voice quality
is poor
Note
Voice quality metrics do not account for noise or distortion, only frame loss.
Related Topics
Cisco Unified IP Phone Cleaning
To clean your conference phone, use a soft, dry cloth to wipe the conference phone and the LCD screen. Do
not apply liquids or powders directly on the conference phone. As with all non-weather-proof electronics,
liquids and powders can damage the components and cause failures.
Call Statistics Screen, on page 108
Remote Monitoring, on page 111
Cisco Unified IP Conference Phone 8831 and 8831NR Administration Guide
Cisco Unified IP Phone Cleaning
Condition
Network impairment from packet loss or high jitter.
• Noise or distortion in the audio channel such as
echo or audio levels.
• Tandem calls that undergo multiple
encode/decode such as calls to a cellular network
or calling card network.
Check packet transmit (TxCnt) and packet receive
(RxCnt) counters to verify that voice packets are
flowing.
137