QualTest is Sevana’s mobile test probe for VoIP and cellular networks. It runs end-to-end and single-ended call tests and estimates voice quality on both. On VoIP calls it also captures the network metrics, so you can correlate what a caller heard with what the network did; on cellular networks it focuses on the audio quality itself. For a quick overview, see the QualTest deck.

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What the QualTest mobile test probe does

End-to-end and single-ended testing

QualTest runs as an Android application across VoIP and cellular networks. From the frontend, you set up tests by specifying the calling and called parties, the reference audio and the devices.

Network metrics with MOS

Moreover, it measures RTT, jitter and packet loss for VoIP calls, and computes a MOS from either reference audio or the real call audio.

Audio correlated with the VoIP network

On VoIP calls, waveform analysis links audio faults to the measured network conditions, so you can see why a call sounded wrong instead of guessing.

Reporting and transcripts

In addition, reporting shows MOS over different time periods and the split of successful and failed test calls, while a speech-to-text engine surfaces what was actually said.

QualTest runs on rooted or unrooted Android phones. Analysis can happen on the phone itself, or on a connected host such as a Raspberry Pi when the phone is unrooted.

Who uses QualTest

Because field testing matters to many roles, several kinds of team rely on the QualTest probe.

Used by

  • Mobile operators
  • Telecom service providers
  • Telecom solution providers
  • 3G, 4G/LTE and 5G test and measurement
  • Test engineers

Designed for

  • Learning about voice quality in cellular or VoIP networks
  • Discovering the reasons behind voice quality loss
  • Comparing quality across devices and time periods
  • Running scheduled tests from a central dashboard

Technical details

Features

QualTest provides:

  • Network RTT, jitter and packet-loss measurement for VoIP calls
  • A MOS score from reference audio or real call audio
  • Waveform analysis that correlates audio problems with VoIP network conditions
  • Speech-to-text on the call audio
Main use cases
  • Test mobile call quality in the field
  • Run as a test agent managed from an administrator dashboard
QualTest mobile test probe by Sevana

For your call quality testing needs

Talk to our team about putting the QualTest probe to work in your network.

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