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The VQT Undercradle is a voice quality analyzer that provides objective, quantitative metrics and analysis of end user voice quality parameters for hybrid PSTN/packet switched networks, using analog telephony interfaces. The VQT Undercradle combines voice quality testing with protocol and performance analysis of data networks. The VQT Undercradle attaches to the Keysight (formerly Agilent) Advisor to perform End-to-end measurements for clarity, delay, echo, DTMF twist and attenuation, and VAD analysis through FXO and E&M interfaces. Provides detailed measurement and analysis capabilities for the key metrics of voice quality: clarity, delay and echo.