Cisco CP-7942G Administration Guide - Page 169

Where to Go for More Troubleshooting Information, Cleaning the Cisco Unified IP Phone

Page 169 highlights

Chapter 9 Troubleshooting and Maintenance Where to Go for More Troubleshooting Information Table 9-5 Changes to Voice Quality Metrics Metric Change Condition Conceal Ratio is near or at zero, • Noise or distortion in the audio channel such as echo or but the voice quality is poor. audio levels. • Tandem calls that undergo multiple encode/decode such as calls to a cellular network or calling card network. • Acoustic problems coming from a speakerphone, handsfree cellular phone or wireless headset. Check packet transmit (TxCnt) and packet receive (RxCnt) counters to verify that voice packets are flowing. Note Voice quality metrics do not account for noise or distortion, only frame loss. 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. • Cisco Unified IP Phone Troubleshooting Resources: http://www.cisco.com/en/US/products/hw/phones/ps379/tsd_products_ support_series_home.html • Cisco Products and Services (Technical Support and Documentation): http://www.cisco.com/en/US/products/sw/voicesw/tsd_products_support_ category_home.html 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. OL-15483-01 Cisco Unified IP Phone 7962G and 7942G Administration Guide for Cisco Unified Communications Manager 7.0 9-17

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9-17
Cisco Unified IP Phone 7962G and 7942G Administration Guide for Cisco Unified Communications Manager 7.0
OL-15483-01
Chapter 9
Troubleshooting and Maintenance
Where to Go for More Troubleshooting Information
Note
Voice quality metrics do not account for noise or distortion, only frame loss.
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.
Cisco Unified IP Phone Troubleshooting Resources:
support_series_home.html
Cisco Products and Services (Technical Support and Documentation):
category_home.html
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.
Conceal Ratio is near or at zero,
but the voice quality is poor.
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.
Acoustic problems coming from a speakerphone,
handsfree cellular phone or wireless headset.
Check packet transmit (TxCnt) and packet receive (RxCnt)
counters to verify that voice packets are flowing.
Table 9-5
Changes to Voice Quality Metrics
Metric Change
Condition