When the TE20 connects to a cloud videoconference at : lifesize.com the audio from Huawei devices was like a robot sound.
Perform a loopback test to assure that TE20 was fine and request wireshark packet capture. However found that the lifesize site was not using protocols like: AAC-LD but was using G7221C
disable those protocols and the audio problem was fixed:
Audio codec issue.