Cisco 7906G Administration Guide

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Cisco Unified IP Phone 7906G and 7911G Administration Guide for Cisco Unified CallManager 5.1
OL-11515-01
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.
• 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
Conceal Ratio and Conceal
Seconds increase significantly
• Network impairment from packet
loss or high jitter.
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, hands-free cellular
phone or wireless headset.
Check packet transmit (TxCnt) and
packet receive (RxCnt) counters to verify
that voice packets are flowing.
Table 9-4 Changes to Voice Quality Metrics (continued)
Metric Change Condition

Cisco 7906G Specifications

General

Brand	Cisco
Model	7906G
Category	IP Phone
Language	English