We introduce recently DTX in DL with Half Rate. We made a lot of measurements with different equipments. With ASCOM QVoice we does not encounter any problems. But there is not much silence in the speech samples. With TEMS in perfect conditions (our lab) we have very low SQI (RxQual both SUB and FULL is 0). Also we listen to the speech and find no disturbance. Can anyone perform simillar test to confirm that SQI is not suitable for such measurements?