52.28.8 AQM Measurement

Performs audio quality measurement (AQM), including PESQ/POLQA, during a CS voice call. See chapters "AQM for CS Voice with ACU TerraTec" and "AQM for CS Voice with AQM Modules".
Please note that in certain CS voice AQM setups, you do not use this activity but rather the Voice Quality activity. Details are given under the latter.

Configuration property:

Algorithm: One of PESQ, POLQA NB, and POLQA SWB. Please note that POLQA can be measured only in the ACU TerraTec configuration (Measurement Type = "M2M DL + UL").

Measurement Type:

M2F DL + UL: Mobile-to-fixed audio quality measurement using CallGenerator.

M2M DL: Mobile-to-mobile audio quality measurement using Mobile Receiving Unit (MRU).

M2M DL + UL: Mobile-to-mobile audio quality measurement using Audio Capturing Unit (ACU TerraTec).

AQM Duration: The length of time for which to collect audio quality measurements ("hh:mm:ss").

Audio Channel (only used for M2M DL + UL, otherwise has the value "None"):

Channel1: Choose this channel for the phone connected to LINE IN 1/LINE 0;OUT 0;1 on the ACU (TerraTec).

Channel2: Channel for phone connected to LINE 0;IN 0;2/LINE 0;OUT 0;2.

Channel3: Channel for phone connected to LINE 0;IN 0;3/LINE 0;OUT 0;3.

Channel4: Channel for phone connected to LINE 0;IN 0;4/LINE 0;OUT 0;4.

Recording Threshold (only used for M2M DL + UL): All audio files (*.pcm) with an AQM value worse than this threshold value will be stored under My Documents\TEMS Product Files\TEMS Investigation 23.2\Voice Quality Recordings. The point of this mechanism is to have files with poor audio quality automatically saved for further study.