I have see some problems last week and get reported by end users about some cutting. If I count from 1 to 20 some numbers are cut and the other person do not hear that. Is happening on all phones. Well recently I have changed phone from Polycom to Yealinks. Yealink with newest firmware: 18.104.22.168
I dont see VAD enable - its disabled so this is the only thing comes to my mind. I have checked QOS on my switches and firewall - I see pockets are categorised correctly so this is not an issue here. I know it smells like QoS but its not. I dont see any errors in call in asterisk besides this:
WARNING[C-000002d4]: translate.c:405 framein: no samples for ulawtolin
I don’t think this cause the problems with Yealink phones. I tried both ulaw and g729 - same issue. Seems like people started complaining after switching to Yealink phones. I am out of any ideas and only bang my head into a wall.