User's Manual Part 2

Nomad User’s Manual Chapter 10 – Call Performance Configuration Options

When testing is complete, the matching Mobile Originated and Mobile Terminated results are

merged together to create a single session file. Generate a report in the standard manner for this

merged session file. Test results can be found on the Call Performance Summary, Call Initiation,

Call Retention, Audio Verification and Device Performance tabs of the output report.

In the report, the Mobile to Mobile “Calling” channel is treated as a Mobile Originated task. The

Mobile to Mobile “Receiving” channel is treated as a Mobile Terminated task. The statistics

reported for the two tasks will likely be similar, with a few key differences:

 Call Initiation Statistics – Calls that failed on the MO side will not be represented on the

MT side. Specifically, initiations classified as Failed Attempts, No Service or Access

Timeout will be counted on the MO channel but not on the MT channel.

 Setup Time – The Setup Time is generally larger for MT calls than for MO calls.

Spirent recommends following this best practice for the best results with Mobile-to-Mobile call

performance testing:

 The Access Timeout parameter for a Mobile-to-Mobile call campaign must be set to a

larger duration than it takes the phone to go to voicemail. If Access Timeout is too short,

Nomad will fail to recognize a call sent to voicemail. Instead, such a call will be classified as

an Access Timeout before voicemail picks up. A 45-second Access Timeout is generally

sufficient for North American carriers.