VoIP conformance testing
Of particular interest to our customers is the conformance testing that we perform for VoIP equipment. As mentioned above these tests are split into VoIP Acoustic Performance, VoIP Voice Quality and VoIP Quality of Service.
VoIP Acoustic Performance
| Measurement | Description |
|---|---|
| SLR | Send Loudness Rating |
| RLR | Receive Loudness Rating |
| Frequency Response | Measures the gain or attenuation of transmitters or receivers as a function of frequency |
| STMR | Sidetone Masking Rating |
| Distortion | Measures the total harmonic distortion of the transmitter and receiver (summed up to the 5th harmonic) |
| Noise |
Send Noise is the noise contributed to the line by the TE. Receiver Noise is the noise contributed at the ear of the TE. |
| Acoustic Shock | Measures the maximum r.m.s. output sound pressure level to ensure that it meets with standardized requirements. |
VoIP Voice Quality
| Standard | Title |
|---|---|
| ITU-T P.862 | Perceptual evaluation of speech quality (PESQ): An objective method for end-to-end speech quality assessment of narrow-band telephone networks and speech codecs |
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