n Call Quality vs. Client Health chart in the UCC dashboard of the switch.
When VoIP calls are prioritized using media classification, end-to-end call quality metrics such as Mean Opinion
Score (MOS), delay, jitter, and packet loss are not available.
UCC score computes the quality of voice calls. It takes delay, jitter, and packet loss of Real-time Transport
Protocol (RTP) packets into account. UCC score is computed on a scale of 0 to 100. To compute the UCC score,
you must enable RTP Analysis on the master switch.
In the CLI
To enable RTP analysis in the CLI:
(host) (config) #voice real-time-config
(host) (Configure Real-Time Analysis) #config-enable
In the WebUI
To enable RTP Analysis in the WebUI:
1. Navigate to Configuration > Advanced Services > All Profiles.
2. In Profiles section, expand Other Profiles > Configure Real-Time Analysis.
3. In Profile Details section, check the Real-Time Analysis of voice calls check box.
4. Click Apply.
Available Call Quality Metrics
Following call quality metrics are available for Lync/Skype4b calls prioritized by media classification:
Client IP, Client Mac, ALG, Duration(approximate), Orig time(approximate), Status, Reason, Call Type
(voice/video), Client Health, UCC Score, UCC Band, Source port, Destination port, Originated and modified
DSCP & WMM values, delay, jitter, and packet loss.
As the RTP packets are encrypted, following call quality metrics are not available for Lync/Skype4b calls
prioritized by media classification:
Client Name, Direction, Called to, MOS, MOS band, End-to-end Delay, jitter and packet loss.
File transfer and desktop sharing CDRs are also not available. WLAN delay, jitter, and packet loss are not available
for video sessions.
The show ucc commands are extended to media classification based Lync/Skype4b ALG. For more
information on the list of commands, see Viewing UCC Information on page 958.
The UCC dashboard is extended to media classification based Lync/Skype4b ALG. For more information on
UCC dashboard, see UCC Dashboard in the WebUI on page 954.
Important Points to Remember
n You must disable Lync/Skype4b ALG if you use the classify-media option. For more information on Lync
ALG, see Unified Communication and Collaboration on page 945.
n When using media classification, UCC score, jitter, delay, and packet loss is calculated only for voice RTP
streams. These metrics are not available for video streams.
n Media classification does not work in split-tunnel forwarding mode.
n When VoIP calls are prioritized using media classification, end-to-end call quality metrics such as Mean
Opinion Score (MOS), delay, jitter, and packet loss are not available.
n Media classification is not supported when clients are behind a Network Address Translation (NAT) device.
AOS-W 6.5.3.x | User Guide Voice and Video | 965
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