User's Manual Part 1

Nomad User’s Manual Chapter 4 – Specifying Nomad Settings

4.4.4 Audio Server

The Audio Server facilitates voice quality testing by answering calls, sending and recording .WAV

files, storing the recorded .WAV files and handling uplink data collection. The Audio Server is an

extremely high quality Interactive Voice Response (IVR) service provided by Spirent

Communications to answer calls, send and record speech, and store the recorded samples for

access to uplink results.

In this area:

 Select the geographically relevant Audio Server.

 Enter your Audio Server Username and Password.

 Validate Settings to ensure that the settings are correct for access throughout the test

process.

Figure 4-14 - Audio Server Area

4.4.5 MOS Correction

Invalid MOS scores, such as those obtained by comparing an empty .WAV file to a reference file,

may drastically skew performance statistics. Invalid MOS values may also be obtained when DTMF

(push-button) tones are audible in the recorded speech sample. Selecting Enable MOS Correction

prevents invalid MOS scores from being reported. This option is enabled by default.

Figure 4-15 - MOS Correction Area

4.4.6 IMS Setup

This setting is currently inapplicable to most users. It is utilized for configuring a local IMS client

that will act as the server side in Voice Quality testing. For users configuring the local IMS client,

this field should point to the boghe-remote.dll that is located on the Nomad system. This feature is

part of the CS8 Nomad lab integration. For more information please contact your Spirent Sales

representative.