GL Communications Inc.
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Active and Passive Voice Quality Testing


The VQuad™ provides the one box active QoS solution for sending/recording voice over a variety of network interfaces in an automated and synchronized manner. Using the GL VQT, analysis of the recorded voice files can automatically be executed from the VQuad™ in an intrusive manner. The VQT utilizes the ITU algorithms POLQA NB/WB/SWB and PESQ LQ/LQO/WB. In addition to sending/recording voice, the VQuad™ along with Dual UTA HD also supports RTD/OWD, Voice, Data, and Video quality measurements, drive testing with GPS mapping, & Indoor Tracking System (ITS) to provide tracking information in remote locations.

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The GL Passive Quality of Service testing allows one to monitor voice anywhere within a network (using the desired Wireless/VoIP/TDM/Analog Network probes) and gather statistics and quality of service measurements. The various network probes utilize GL hardware and software applications to support T1/E1, Analog, and VoIP networks. All network probes are non-intrusive and require no active testing on either side of the call. Rather, the non-intrusive Passive Monitoring utilizes the metrics from the voice or VoIP RTP and provides statistics, analytical measurements, and in certain cases MOS results.

Main Features

Passive QoS Analysis

  • Call Quality Of Service (QOS) for all calls with E-Model based (G.107) Mean Opinion Score (MOS) and R-factor with individual and summary statistics presented in graphical and tabular formats
  • MOS score for VoIP Networks using E-Model
  • Near Real-Time QoS Measurements of All Networks
  • Line Echo and Acoustic Echo Measurements
  • Automated operation
  • Results can be exported to file

Active QoS Analysis

  • MOS score using ITU Standard Algorithms POLQA NB/WB/SWB and PESQ LQ/LQO/WB
  • Additional Metrics include Jitter, Clipping, Levels, Latency
  • Automated operation
  • Results saved to database with full featured Query functionality
  • Graphical and Tabular results can be exported to file

Additional Links

For Wireless Networks

For VoIP Networks

For T1 E1 Networks

For PSTN Network

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