Reports

QoE Summary Report

The QoE summary report shows the sample size of calls and aggregate values for the following MOSs so that you can see at a glance the average level of media quality for audio calls whose quality was monitored:

• Conversational MOS

• Listening MOS

• Network MOS

• Sending MOS

If you click a metric in the report, a subreport displays a histogram that shows the distribution of scores for that metric.

For each MOS, the QoE Summary Report shows the average score for a prior period, as well as for the current period. The current period is the time range that is specified in the Period filter, and the period ends on the date and time specified in the Period End field of the report. The Prior Period is the same time range, but it ends on the start date of the Current Period. For example, Figure 2 shows a QoE Summary Report for the current week and for the week before. The Difference column shows the difference between the sample size and the MOSs for both periods of time. The larger the sample size, the more meaningful the average score.

Figure 2. QoE Summary Report

Figure 3. QoE Summary Report – Conversational MOS

QoE Trend Report

The QoE trend report shows changes in the MOSs over time so that you can see whether media quality is improving, declining, or staying the same. The following MOSs are reported:

• Conversational MOS

• Listening MOS

• Sending MOS

• Network MOS

• Network MOS Degradation

The QoE Trend Report displays the MOSs and the network MOS degradation over the period that is specified by the Period and Period Ends filters. For example, the QoE Trend Report in Figure 4 shows the MOSs over one week period with the specified end date. Each row shows a trend for a particular metric. The blue horizontal line represents the cumulative mean value for the MOSs that are shown. In this example, the Mean column shows the cumulative MOS for each metric for the previous week. The mean value can be calculated by using the following formula:

Mean = sum of (MOS * number of samples) / total number of samples

Using the above formula, the mean value for this example would be:

Conversational MOS Mean = (2.98*44 + 3.12*33 + 3.06*26 + 2.88*33 + 3.40*4 + 3.08*35 + 2.96*31) / (44 + 33 + 26 + 33 + 4 + 35 + 31) = 3.02

If you click the column heading, a Call List Report for that day will be displayed. For details about the Call List Report, see the Call List section in Scenario and Other Report Collections later in this guide.

Figure 4. QoE Trend Report

Worst Performing Endpoints

The worst performing endpoints report shows the 100 endpoint with the lowest MOSs so that you can proactively correct poor performing endpoints even if the individual endpoint is not causing an alert.

By default, the Worst Performing Endpoints report lists the endpoints beginning with the worst performer. You can, however, sort each column as you choose. Because the conversational MOS, the sending MOS, and the listening MOS are not statistically valid if the sample size is too small, these values are included in the report only if the sample size is greater than 30.

Table 4 shows an example of a Worst Performing Endpoints report.

Table 4. Sample Worst Performing Endpoints report

Device Report

The device report, which is not included in conference reports, displays the number of calls that were made and the number of unique users, as well as the cumulative Conversational MOS, Sending MOS, and Listening MOS of the recipients for each device.

The device report captures the conversational MOS, sending MOS of the device, and the listening MOS on the receiving end in order to help you identify devices that are performing poorly. By default, the report will show all capture devices so that you can compare performance across devices. A typical device issue will manifest itself as echo and/or distortion. The following device report shows a sample of capture devices. For each device, it shows the number of calls that were made, how many unique users made calls, and the relevant MOSs.

Table 5. Device Report