Product details.
ITU-T testing.
1. ITU-T testing.
The Chinese name of ju- is the International Telecommunication Union Black Remote Information Standardization Organization (tu-jrtuele0mus***dztse This is the ** fixed-range communication-related quasi-weaving managed by the Telecommunication Union, and the communication visit formulated by U-is called Recommendations).
2. ITU-T knowledge sharing test items.
Voice distortion in two-way conversations.
Microphone sensitivity test.
Frequency response test of the microphone.
Microphone output level in the car.
Overload point test.
Microphone frequency response in a car.
Rated loudness test in the direction of transmission.
Rated loudness test in the receiving direction.
Change in the rated loudness of the transmit direction.
One-way voice quality in the receiving direction.
The voice quality in the sending direction is stable.
The voice quality in the receiving direction is stable.
Self-noise test.
Received an out-of-the-box data signal in the direction.
Distortion of the sending direction.
Closing direction is delayed.
Spectral echo subtraction.
Initial convergence without background noise.
The quality of one-way speech in the sending direction.
Activation of the receiving direction.
The decay range of the sending direction.
Send voice attenuation in a two-way session.
Background noise transmission after the call is set up.
Voice quality in the presence of background noise.
SRW Junction Ringing Void Rating.
SRW linearity in the transmit direction.
SRW linearity in the receiving direction.
SRW unidirectional voice quality in the receive direction.
Stability of voice quality in the receiving direction.
Microphone directional characteristics test.
Microphone distortion test.
High sound pressure level test.
Free channel noise test.
Improvement in signal-to-noise ratio.
The sending direction is delayed.
Change in the rated loudness of the receive direction.
Frequency response of transmit sensitivity.
Frequency response of the receiving sensitivity.
Free channel noise in the transmit direction.
Free channel noise in the receiving direction.
Identification of out-of-the-box data signals from the sender.
Distortion of the receiving direction.
Termination loss.
Echo level over time.
There is initial convergence of background noise.
Echo performance. Activation of the sending direction.
In the decay of the receiving direction.
Attenuation in a two-way session.
Echo component detection in bidirectional sessions.
Background noise transmission quality.
Comfort noise injection.
SRW retired.
Frequency response of SRW sensitivity.
Srw noise cancellation test in the transmit direction.
Verification of echo control failures.
3. ITU-T test standards.
1) itu-tp1110;
2) itu-tp1100