Where To Go For More Troubleshooting Information; Cleaning The Cisco Unified Ip Phone - Cisco 6921 Administration Manual

Where to Go for More Troubleshooting Information

Table 9-4
Metric Change
Conceal Ratio is near or at zero,
but the voice quality is poor.
Voice quality metrics do not account for noise or distortion, only frame loss.
Note
Where to Go for More Troubleshooting Information
If you have additional questions about troubleshooting the Cisco Unified IP Phones, several Cisco.com
web sites can provide you with more tips. Choose from the sites available for your access level.
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Cleaning the Cisco Unified IP Phone

To clean your Cisco Unified IP phone, use only a dry soft cloth to gently wipe the phone and the LCD
screen. Do not apply liquids or powders directly on the phone. As with all non-weather-proof
electronics, liquids and powders can damage the components and cause failures.
Cisco Unified IP Phone 6921, 6941, and 6961 Administration Guide for Cisco Unified Communications Manager 8.0 (SCCP)
9-14
Changes to Voice Quality Metrics
Cisco Unified IP Phone Troubleshooting Resources:
http://www.cisco.com/en/US/products/hw/phones/ps379/tsd_products_support_troubleshoot_and_
alerts.html
Cisco Products and Services (Technical Support and Documentation):
http://www.cisco.com/en/US/products/ps10326/tsd_products_support_series_home.html
Condition
Noise or distortion in the audio channel such as echo or
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audio levels.
Tandem calls that undergo multiple encode/decode such as
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calls to a cellular network or calling card network.
Acoustic problems coming from a speakerphone,
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handsfree cellular phone or wireless headset.
Check packet transmit (TxCnt) and packet receive (RxCnt)
counters to verify that voice packets are flowing.
Chapter 9 Troubleshooting and Maintenance
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