The PSTN Device report can provide you with metrics showing the performance levels of various endpoint devices on your network during unified communications-to-public switched telephone network (UC-to-PSTN) calls, to help you identify devices that are performing poorly. The metrics used focus on conversational quality and acoustic measures. By default, the report shows all capture devices so that you can compare performance across devices.

For each device type, the report displays the following:

Additionally, for Office Communicator endpoints only, the Speech/Echo, Speech Level, Background Noise, and Background Noise Sent are shown.

You can sort the results by each column. Overall quality score averages for all devices are shown at the top of each data column, so that you can compare each individual device’s scores with the overall average.

In this list, you can click the name of a device and see a list of individual calls that involved the device, and the quality scores for each call.


You can filter the data in this report based on the following:

  • Location.Use this filter to view data from only a specific location or subnet.

  • Media Connectivity.Use this to choose only calls that are directly connected (that is, by users within the enterprise), or calls that use the A/V Edge service or the HTTP Proxy to be connected (that is, calls that involve external users).

  • Mediation Server.Use this to choose only calls that go through a specific Mediation Server. This filter can be particularly useful for isolating faults on the Mediation Server-gateway leg of calls.

  • Capture Device prefix.In this filter, you can type a partial string, and the report will show only devices with descriptions that begin with that string. Examples of useful strings to type here would be headsetor microphone.

    If you leave this filter blank the report will query for all devices, and the report might take a long time to generate on large networks.
  • Exclude External Calls.Select this to exclude calls where either the sender or receiver are located outside of the enterprise network. Note that this is Trueby default; select Falseto include external calls in the report.

  • Client Type.Use this filter to view the quality of calls on specific client types, such as Office Communicator, Office Communicator Phone Edition, or Office Communications Server 2007 R2 Attendant.

  • Call Type.Use this filter to select the direction of calls: PSTN-to-UC, UC-to-PSTN, or both.


  • You want to evaluate the performance of new headsets purchased for your UC users. You use this report, with the Capture Device prefixset to the beginning of the name of these headsets, to get a quality report for only those devices, to compare to your overall device numbers.

See Also