PESQ - (Perceptual Evaluation of Speech Quality) measures and quantifies voice quality in the ultimate terms - customer perception. PESQ measures the effects of distortions such as noise, delay, and front-end clipping to provide a single Mean Opinion Score (MOS) plus a wealth of diagnostic information.
PESQ measures voice quality by comparing an input test signal with the signal output, across a connection and is effective across a range of networks, including PSTN, mobile, and VoIP.
PESQ takes into account coding distortions, errors, packet loss, delay, variable delay and filtering.
TCS using the PESQ algorithm is perfect for verifying all your VoIP links and send alerts if the quality is degraded. TCS uses the new relase 2.0 of PESQ supporting the Rec. P.862.1 extension.