I\'m trying to do a voice quality test (pesq), but I don\'t understand how to start. I trying to compile a public source code (http://www.itu.int/itu-t/recommendations/index.asp
Try AQuA software, it's not an ITU-T standard, but solves VoIP speech quality testing very well:
http://www.sevana.fi/voice_quality_testing_measurement_analysis.php