User's Manual Part 2

Nomad User’s Manual Chapter 9 – Voice Quality Configuration Options

9.3 IMS Client Testing

Nomad provides the option for Utilizing a local IMS Client as the Uplink Device. The mobile handset

will source speech while the IMS Client will record the uplink speech sample for ten seconds, acting

in the traditional role as the voice server. In the next ten second cycle, the IMS client will source

speech while the mobile handset records the downlink speech sample. The uplink and downlink

speech sample recordings are scored by Nomad.

To perform testing utilizing the local IMS Client as Uplink Device:

 Connect the test handset to any active channel on the Spirent ME hardware unit via audio

cable or Bluetooth.

 On the Nomad Test Setup screen, configure that channel as a Mobile task with the

following settings:

o Session → Uplink Device: IMS Client

o Channel Settings → Audio interface for this channel: Analog Interface(ME),

Narrowband (ME HD), High Definition (ME HD) or Bluetooth Interface as desired.

Note that a maximum of two Bluetooth devices is permitted for Voice Quality testing

at one time.

 Click the Start Logging Session button and proceed through the Start Logging Session

Wizard.

 The test sequence starts with the mobile handset sourcing data to the IMS Client.

 In the second half of the cycle, the IMS Client will source data to the mobile handset.

Downlink data collected at the handset is displayed in the Voice Quality Task Status

Window during the following cycle.

 During testing, adjust the downlink volume using the Settings → Levels dialog such that the

Insertion Gain (PESQ) or Attenuation (POLQA) falls as close to 0 as possible. The Input

slider should sit within the Normal Operating Range values displayed.

 End the test when desired.

Test results can be found on the Voice Quality Summary tab of the output report.

9.4 Mobile-to-Mobile Testing

Nomad provides the option for Mobile-to-Mobile testing. One handset will source speech while the

other will record speech for ten seconds. The process will alternate in the next ten second cycle.

Both the sourcing and recording is handled by a single Nomad installation.

To perform Mobile-to-Mobile testing:

 Connect one handset to Channel 1 of the Spirent ME hardware unit via audio cable.

Connect the second handset to Channel 2.