VQM Statistics Menu

Voice quality monitoring (VQM) allows real time passive Voice over IP (VoIP) quality measurements to be taken on all Realtime Transport Protocol (RTP) voice streams transmitted through an AOS device. The VQM statistics gathered by the AOS device are shared with the n-Command® MSP server using the VQM reporter. The reporter must be enabled on the AOS device before n-Command MSP can aggregate the VQM statistics gathered by the AOS device. Configuring the VQM reporter is done through the command line interface (CLI) on the AOS device, and consists of creating the reporter, configuring the parameters of the reporter, and viewing the reporter statistics. The reporter must be configured before n-Command MSP will gather VQM statistics. VQM reporter configuration instructions are outlined in the guide Configuring VQM Reporter for AOS and n-Command MSP (article number 3099), available from ADTRAN's knowledge base at the following location: http://kb.adtran.com/.

The VQM Statistics menu has two methods for viewing voice data. The first is a line chart that displays mean opinion score listening quality (MOS LQ) averages, individual voice streams, or a combination of the two. The second section is the individual call detail grid. To switch from one view to another, select the appropriate icon on the bottom left of the graph. Move the mouse over the icon to display a tool tip describing the view option. The individual call detail grid section is toggled on or off by selecting the last of the four view option icons.

More information is provided for interpreting VQM statistics in the Voice Quality Monitoring Configuration Guide (article number 2262), available from ADTRAN's knowledge base at the following location: http://kb.adtran.com/.

Line Graph

The line graph can display the averages of one interface or the average of all interfaces on the device. Select or deselect the interfaces using the check boxes to the left of the line graph. Not all of the listed interfaces will have voice data to report.

The refresh rate can be changed by selecting the Chart Options from the lower left corner of the screen. The refresh rate only applies to the chart when you are viewing the current day. Make a selection from the drop-down menu.

A 2-week interval is shown on the bottom graph. To zoom in on a smaller time period and display it in detail on the top graph, click and drag the sliders to include the time frame. The tool tips display a start and end time. The date can be changed by selecting the pop-up menu from the lower right corner next to Jump to Day. Select a date from the list to apply it to the line graph.

Individual Call Detail Grid

The individual call detail grid lists every call individually and can be filtered by selecting the Add Filter menu option at the bottom of the grid. Apply a filter in the same manner described in the section Adding a Filter to a List. The columns can be hidden or revealed by selecting the Manage Columns menu option at the bottom of the grid, as discussed in Manage List Columns.

Double click a row in the grid to display individual call details. The line graph disappears, and a new menu is displayed. The new menu lists several collapsed categories, all of which provide details of the call. Select the category to expand the details. Select the category again to collapse it. Multiple categories can be opened at one time.