I've just updated to firmware 18.104.22.1680 from 22.214.171.124 to give it a try. As soon as i gave a first call, i had the impression of a lower quality sound. A sound with less presence. I was using G711a in the two cases. I've reverted to 126.96.36.199 and get back the audio quality. I ask myself if this problem wouldn't be related to the new HI-Q algorythm. Aastra, please could you check audio quality on this firmware, and perhaps give a possibility to disable Hi-Q on futur firmware ?