![Cisco IP Phone 6841 Скачать руководство пользователя страница 237](http://html.mh-extra.com/html/cisco/ip-phone-6841/ip-phone-6841_administration-manual_65713237.webp)
Condition
Metric Change
•
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.
Conceal Ratio is near or at zero, but
the voice quality is poor.
Network impairment from packet loss or high jitter levels:
•
Average MOS LQK decreases may indicate widespread and
uniform impairment.
•
Individual MOS LQK decreases may indicate bursty impairment.
Cross-check the conceal ratio and conceal seconds for evidence of
packet loss and jitter.
MOS LQK scores decrease
significantly
•
Check to see if the phone is using a different codec than expected
(RxType and TxType).
•
Check to see if the MOS LQK version changed after a firmware
upgrade.
MOS LQK scores increase
significantly
Voice quality metrics do not account for noise or distortion, only frame loss.
Note
Voice Quality Reporting
You can capture voice quality metrics for Voice over Internet Protocol (VoIP) sessions with a Session Initiation
Protocol (SIP) event package. Voice call quality information derived from RTP and call information from
SIP is conveyed from a User Agent (UA) in a session (reporter) to a third party (collector).
The Cisco IP phone uses User Datagram Protocol (UDP) to send a SIP PUBLISH message to a collector
server.
Supported Scenarios for Voice Quality Reporting
Currently, only the basic call scenario supports voice quality reporting. A basic call can be a peer to peer
incoming or outgoing call. The phone sends the SIP Publish message when a call ends.
Cisco IP Phone 6800 Series Multiplatform Phones Administration Guide
223
Voice Quality Reporting
Содержание IP Phone 6841
Страница 15: ...P A R T I About the Cisco IP Phone Cisco IP Phone Hardware page 3 Technical Details page 11 ...
Страница 16: ......
Страница 34: ...Cisco IP Phone 6800 Series Multiplatform Phones Administration Guide 20 External Devices ...
Страница 35: ...P A R T II Phone Installation Cisco IP Phone Installation page 23 Third Party Call Control Setup page 61 ...
Страница 36: ......
Страница 79: ...P A R T III Phone Accessories Cisco IP Phone Accessories page 67 Wall Mount Kit page 71 ...
Страница 80: ......
Страница 84: ...Cisco IP Phone 6800 Series Multiplatform Phones Administration Guide 70 Headsets ...
Страница 92: ......
Страница 146: ...Cisco IP Phone 6800 Series Multiplatform Phones Administration Guide 132 Configure the XML Directory Service ...
Страница 147: ...P A R T V Phone Troubleshooting Monitoring Phone Systems page 135 Troubleshooting page 209 Maintenance page 221 ...
Страница 148: ......
Страница 222: ...Cisco IP Phone 6800 Series Multiplatform Phones Administration Guide 208 Cisco IP Phone Web Page ...