Analyzing VOICE Quality from CUCM logs

[Alok Mohanty]

Hello All

In order to determine the voice quality , is it sufficient to verify "numberPacketsLost=0 jitter=0 latency=0".

Secondly whats a good percentage value of (numberPacketsReceived/numberPacketsSent) ? Should this not give a quantitive measure of the voice quality.

StationInit: (0153560) ConnectionStatisticsRes directoryNum=8920040 ci=203823339 statsProcessingMode=0 numberPacketsSent=3833 numberOctetsSent=613280 numberPacketsReceived=3819 numberOctetsReceived=611040 numberPacketsLost=0 jitter=0 latency=0.

Source Filename: SDL019_100_000778.txt.gz

Thanks

Alok

[Mohammed al Baqari · Accepted solution]

Hi,

You are right. Voice quality is measured by latency, packet loss and jitter (there are other elements but supplementary such as echo-cancellation, noise reduction, etc).

From SRND, the parameters recommended are one-way latency < 100 msec, jitter < 30 msec, packet loss < 1%.

RTMT can provide you with good QoS report about each call which is in readable format. You can also define your thresholds in the reporting

[Manish Gogna · Accepted solution]

Hi Alok,

You can use QRT which is specific to quality parameters for voice calls

http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/admin/8_5_1/ccmfeat/fsgd-851-cm/fsqrt.html#wp1057888

Manish